# -*- coding: utf-8 -*-

import faulthandler
import unittest
import pyffish as sf

faulthandler.enable()

CHESS = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
CHESS960 = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w HAha - 0 1"
CAPA = "rnabqkbcnr/pppppppppp/10/10/10/10/PPPPPPPPPP/RNABQKBCNR w KQkq - 0 1"
CAPAHOUSE = "rnabqkbcnr/pppppppppp/10/10/10/10/PPPPPPPPPP/RNABQKBCNR[] w KQkq - 0 1"
SITTUYIN = "8/8/4pppp/pppp4/4PPPP/PPPP4/8/8[KFRRSSNNkfrrssnn] w - - 0 1"
MAKRUK = "rnsmksnr/8/pppppppp/8/8/PPPPPPPP/8/RNSKMSNR w - - 0 1"
SHOGI = "lnsgkgsnl/1r5b1/ppppppppp/9/9/9/PPPPPPPPP/1B5R1/LNSGKGSNL[-] w - - 0 1"
SHOGI_SFEN = "lnsgkgsnl/1r5b1/ppppppppp/9/9/9/PPPPPPPPP/1B5R1/LNSGKGSNL b - 1"
SEIRAWAN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR[EHeh] w KQBCDFGkqbcdfg - 0 1"
GRAND = "r8r/1nbqkcabn1/pppppppppp/10/10/10/10/PPPPPPPPPP/1NBQKCABN1/R8R w - - 0 1"
GRANDHOUSE = "r8r/1nbqkcabn1/pppppppppp/10/10/10/10/PPPPPPPPPP/1NBQKCABN1/R8R[] w - - 0 1"
XIANGQI = "rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR w - - 0 1"
SHOGUN = "rnb+fkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNB+FKBNR[] w KQkq - 0 1"
JANGGI = "rnba1abnr/4k4/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/4K4/RNBA1ABNR w - - 0 1"


ini_text = """
# Hybrid variant of Grand-chess and crazyhouse, using Grand-chess as a template
[grandhouse:grand]
startFen = r8r/1nbqkcabn1/pppppppppp/10/10/10/10/PPPPPPPPPP/1NBQKCABN1/R8R[] w - - 0 1
pieceDrops = true
capturesToHand = true

# Shogun chess
[shogun:crazyhouse]
startFen = rnb+fkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNB+FKBNR[] w KQkq - 0 1
commoner = c
centaur = g
archbishop = a
chancellor = m
fers = f
promotionRank = 6
promotionLimit = g:1 a:1 m:1 q:1
promotionPieceTypes = -
promotedPieceType = p:c n:g b:a r:m f:q
mandatoryPawnPromotion = false
firstRankPawnDrops = true
promotionZonePawnDrops = true
whiteDropRegion = *1 *2 *3 *4 *5
blackDropRegion = *4 *5 *6 *7 *8
immobilityIllegal = true

# Asymmetric variant with one army using pieces that move like knights but attack like other pieces (kniroo and knibis)
[orda:chess]
startFen = lhaykahl/8/pppppppp/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1
centaur = h
knibis = a
kniroo = l
silver = y
promotionPieceTypes = qh
flagPiece = k
whiteFlag = *8
blackFlag = *1

[diana:losalamos]
pieceToCharTable = PNBRQ................Kpnbrq................k
bishop = b
promotionPieceTypes = rbn
castling = true
castlingKingsideFile = e
castlingQueensideFile = b
startFen = rbnkbr/pppppp/6/6/PPPPPP/RBNKBR w KQkq - 0 1

[passchess:chess]
pass = true
"""

sf.load_variant_config(ini_text)


variant_positions = {
    "chess": {
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1": (False, False),  # startpos
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -": (False, False),  # startpos
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR": (False, False),  # startpos
        "rnbqkbnr/ppp2ppp/4p3/3pP3/8/8/PPPP1PPP/RNBQKBNR w KQkq d6 0 3": (False, False),
        "k7/8/8/8/8/8/8/K7 w - - 0 1": (True, True),  # K vs K
        "k7/b7/8/8/8/8/8/K7 w - - 0 1": (True, True),  # K vs KB
        "k7/n7/8/8/8/8/8/K7 w - - 0 1": (True, True),  # K vs KN
        "k7/p7/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vs KP
        "k7/r7/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vs KR
        "k7/q7/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vs KQ
        "k7/nn6/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vsNN K
        "k7/bb6/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vs KBB opp color
        "k7/b1b5/8/8/8/8/8/K7 w - - 0 1": (True, True),  # K vs KBB same color
        "kb6/8/8/8/8/8/8/K1B6 w - - 0 1": (True, True),  # KB vs KB same color
        "kb6/8/8/8/8/8/8/KB7 w - - 0 1": (False, False),  # KB vs KB opp color
        "8/8/8/8/8/6KN/8/6nk w - - 0 1": (False, False),  # KN vs KN
    },
    "atomic": {
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1": (False, False),  # startpos
        "8/8/8/8/3K4/3k4/8/8 b - - 0 1": (True, True),  # K vs K
        "k7/p7/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vs KP
        "k7/q7/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vs KQ
    },
    "crazyhouse": {
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR/ w KQkq - 0 1": (False, False),  # lichess style startpos
    },
    "3check": {
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 3+3 0 1": (False, False),  # startpos
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 +0+2": (False, False),  # lichess style check count
        "k7/n7/8/8/8/8/8/K7 w - - 1+2 0 1": (True, False),  # K vs KN
        "k7/b7/8/8/8/8/8/K7 w - - 3+1 0 1": (True, False),  # K vs KB
    },
    "horde": {
        "rnbqkbnr/pppppppp/8/1PP2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP w kq - 0 1": (False, False),  # startpos
    },
    "racingkings": {
        "8/8/8/8/8/8/krbnNBRK/qrbnNBRQ w - - 0 1": (False, False),  # startpos
        "8/8/8/8/8/8/K6k/8 w - - 0 1": (False, False),  # KvK
    },
    "placement": {
        "8/pppppppp/8/8/8/8/PPPPPPPP/8[KQRRBBNNkqrrbbnn] w - - 0 1": (False, False),  # startpos
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR[] w KQkq - 0 1": (False, False),  # chess startpos
        "k7/8/8/8/8/8/8/K7[] w - - 0 1": (True, True),  # K vs K
    },
    "newzealand": {
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1": (False, False),  # startpos
    },
    "seirawan": {
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR[HEhe] w KQBCDFGkqbcdfg - 0 1": (False, False),  # startpos
        "k7/8/8/8/8/8/8/K7[] w - - 0 1": (True, True),  # K vs K
        "k7/8/8/8/8/8/8/KH6[] w - - 0 1": (False, True),  # KH vs K
        "k7/8/8/8/8/8/8/4K3[E] w E - 0 1": (False, True),  # KE vs K
    },
    "cambodian": {
        "rnsmksnr/8/pppppppp/8/8/PPPPPPPP/8/RNSKMSNR w DEde 0 0 1": (False, False),  # startpos
        "1ns1ksn1/r6r/pppmpppp/3p4/8/PPPPPPPP/RK2N2R/1NS1MS2 w Ee - 6 5": (False, False),
    },
    "sittuyin": {
        "8/8/4pppp/pppp4/4PPPP/PPPP4/8/8[KFRRSSNNkfrrssnn] w - - 0 1": (False, False),  # startpos
        "k7/8/8/8/8/8/8/K7 w - - 0 1": (True, True),  # K vs K, skip pocket
        "k6P/8/8/8/8/8/8/K7[] w - - 0 1": (True, True),  # KP vs K
        "k6P/8/8/8/8/8/8/K6p[] w - - 0 1": (False, False),  # KP vs KP
        "k7/8/8/8/8/8/8/KFF5[] w - - 0 1": (False, True),  # KFF vs K
        "k7/8/8/8/8/8/8/KS6[] w - - 0 1": (False, True),  # KS vs K
    },
    "makpong": {
        "8/8/8/4k2K/5m~2/4m~3/8/8 w - 128 8 58": (True, False),  # KFF vs K
        "k7/n7/8/8/8/8/8/K7 w - - 0 1": (True, False),  # K vs KN
        "k7/8/8/8/8/8/8/K7 w - - 0 1": (True, True),  # K vs K
    },
    "xiangqi": {
        "rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR w - - 0 1": (False, False),  # startpos
        "5k3/4a4/3CN4/9/1PP5p/9/8P/4C4/4A4/2B1K4 w - - 0 46": (False, False),  # issue #53
        "4k4/9/9/9/9/9/9/9/9/4K4 w - - 0 1": (True, True),  # K vs K
        "4k4/9/9/4p4/9/9/9/9/9/4KR3 w - - 0 1": (False, False),  # KR vs KP
        "4k4/9/9/9/9/9/9/9/9/3KN4 w - - 0 1": (False, True),  # KN vs K
        "4k4/9/4b4/9/9/9/9/4B4/9/4K4 w - - 0 1": (True, True),  # KB vs KB
        "4k4/9/9/9/9/9/9/9/4A4/4KC3 w - - 0 1": (False, True),  # KCA vs K
    },
    "janggi": {
        JANGGI: (False, False),  # startpos
        "rhea1aehr/4k4/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/4K4/RHEA1AEHR w - - 0 1": (False, False),  # startpos
        "5k3/4a4/3CN4/9/1PP5p/9/8P/4C4/4A4/2B1K4 w - - 0 46": (False, False),  # issue #53
        "4k4/9/9/9/9/4B4/4B4/9/9/4K4 w - - 0 1": (False, True),  # KEE vs K
        "4k4/9/9/9/9/9/9/9/4A4/4KC3 w - - 0 1": (False, True),  # KCA vs K
    },
    "shako": {
        "k9/10/10/10/10/10/10/10/10/KC8 w - - 0 1": (True, True),  # KC vs K
        "k9/10/10/10/10/10/10/10/10/KCC7 w - - 0 1": (False, True),  # KCC vs K
        "k9/10/10/10/10/10/10/10/10/KEC7 w - - 0 1": (False, True),  # KEC vs K
        "k9/10/10/10/10/10/10/10/10/KNE7 w - - 0 1": (False, True),  # KNE vs K
        "kb8/10/10/10/10/10/10/10/10/KE8 w - - 0 1": (False, False),  # KE vs KB opp color
        "kb8/10/10/10/10/10/10/10/10/K1E7 w - - 0 1": (True, True),  # KE vs KB same color
    },
    "orda": {
        "k7/8/8/8/8/8/8/K7 w - - 0 1": (False, False),  # K vs K
    },
    "tencubed": {
        "2cwamwc2/1rnbqkbnr1/pppppppppp/10/10/10/10/PPPPPPPPPP/1RNBQKBNR1/2CWAMWC2 w - - 0 1":  (False, False),  # startpos
        "10/5k4/10/10/10/10/10/10/5KC3/10 w - - 0 1":  (False, True),  # KC vs K
        "10/5k4/10/10/10/10/10/10/5K4/10 w - - 0 1":  (True, True),  # K vs K
    },
}

invalid_variant_positions = {
    "chess": (
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 a",  # invalid full move
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - b 1",  # invalid half move
        "rnbqkbnr/ppp2ppp/4p3/3pP3/8/8/PPPP1PPP/RNBQKBNR w KQkq -6 0 3",  # invalid en passant
        "rnbqkbnr/ppp2ppp/4p3/3pP3/8/8/PPPP1PPP/RNBQKBNR w KQkq .6 0 3",  # invalid en passant
        "rnbqkbnr/ppp2ppp/4p3/3pP3/8/8/PPPP1PPP/RNBQKBNR w KQkq d- 0 3",  # invalid en passant
        "rnbqkbnr/ppp2ppp/4p3/3pP3/8/8/PPPP1PPP/RNBQKBNR w KQkq  0 3",  # invalid/missing en passant
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w 123 - 0 1",  # invalid castling
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR g KQkq - 0 1",  # invalid side to move
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNH w KQkq - 0 1",  # invalid piece type
        "rnbqkbnr/pppppppp/7/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",  # invalid file count
        "rnbqkbnr/pppppppp/9/7/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",  # invalid file count
        "rnbqkbnr/pppppppp/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",  # invalid rank count
        "rnbqkbn1/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",  # missing castling rook
        "1nbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",  # missing castling rook
        "rnbqkbnr/pppppppp/8/8/8/4K3/PPPPPPPP/RNBQ1BNR w KQkq - 0 1",  # king not on castling rank
        "rnbqkbnr/pppppppp/8/8/8/RNBQKBNR/PPPPPPPP/8 w KQkq - 0 1",  # not on castling rank
        "8/pppppppp/rnbqkbnr/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",  # not on castling rank
    ),
    "atomic": (
        "rnbqkbnr/pppppppp/8/8/8/RNBQKBNR/PPPPPPPP/8 w KQkq - 0 1",  # wrong castling rank
    ),
    "3check": (
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 3+a 0 1",  # invalid check count
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 +a+2",  # invalid lichess check count
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 +1+4",  # invalid lichess check count
    ),
    "horde": (
        "rnbqkbnr/pppppppp/8/1PP2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPK w kq - 0 1",  # wrong king count
        "rnbq1bnr/pppppppp/8/1PP2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP w kq - 0 1",  # wrong king count
    ),
    "sittuyin": (
        "8/8/4pppp/pppp4/4PPPP/PPPP4/8/8[FRRSSNNkfrrssnn] w - - 0 1",  # wrong king count
    ),
    "shako": {
        "c8c/ernbqkbnre/pppppppppp/10/10/10/10/PPPPPPPPPP/C8C/ERNBQKBNRE w KQkq - 0 1",  # not on castling rank
    },
    "seirawan": {
        "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQK1NR[HEhe] w KQBCDFGkqbcdfg - 0 1",  # white gating flag
        "rnbqkb1r/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR[HEhe] w KQBCDFGkqbcdfg - 0 1",  # black gating flag
    }
}


class TestPyffish(unittest.TestCase):
    def test_version(self):
        result = sf.version()
        self.assertEqual(len(result), 3)

    def test_info(self):
        result = sf.info()
        self.assertTrue(result.startswith("Fairy-Stockfish"))

    def test_variants_loaded(self):
        variants = sf.variants()
        self.assertTrue("shogun" in variants)

    def test_set_option(self):
        result = sf.set_option("UCI_Variant", "capablanca")
        self.assertIsNone(result)

    def test_two_boards(self):
        self.assertFalse(sf.two_boards("chess"))
        self.assertTrue(sf.two_boards("bughouse"))

    def test_start_fen(self):
        result = sf.start_fen("capablanca")
        self.assertEqual(result, CAPA)

        result = sf.start_fen("capahouse")
        self.assertEqual(result, CAPAHOUSE)

        result = sf.start_fen("xiangqi")
        self.assertEqual(result, XIANGQI)

        result = sf.start_fen("grandhouse")
        self.assertEqual(result, GRANDHOUSE)

        result = sf.start_fen("shogun")
        self.assertEqual(result, SHOGUN)

    def test_legal_moves(self):
        fen = "10/10/10/10/10/k9/10/K9 w - - 0 1"
        result = sf.legal_moves("capablanca", fen, [])
        self.assertEqual(result, ["a1b1"])

        result = sf.legal_moves("grand", GRAND, ["a3a5"])
        self.assertIn("a10b10", result)

        result = sf.legal_moves("xiangqi", XIANGQI, ["h3h10"])
        self.assertIn("i10h10", result)

        result = sf.legal_moves("xiangqi", XIANGQI, ["h3h10"])
        self.assertIn("i10h10", result)

        result = sf.legal_moves("shogun", SHOGUN, ["c2c4", "b8c6", "b2b4", "b7b5", "c4b5", "c6b8"])
        self.assertIn("b5b6+", result)

        # In Janggi stalemate position pass move (in place king move) is possible
        fen = "4k4/c7R/9/3R1R3/9/9/9/9/9/3K5 b - - 0 1"
        result = sf.legal_moves("janggi", fen, [])
        self.assertEqual(result, ["e10e10"])

    def test_short_castling(self):
        legals = ['f5f4', 'a7a6', 'b7b6', 'c7c6', 'd7d6', 'e7e6', 'i7i6', 'j7j6', 'a7a5', 'b7b5', 'c7c5', 'e7e5', 'i7i5', 'j7j5', 'b8a6', 'b8c6', 'h6g4', 'h6i4', 'h6j5', 'h6f7', 'h6g8', 'h6i8', 'd5a2', 'd5b3', 'd5f3', 'd5c4', 'd5e4', 'd5c6', 'd5e6', 'd5f7', 'd5g8', 'j8g8', 'j8h8', 'j8i8', 'e8f7', 'c8b6', 'c8d6', 'g6g2', 'g6g3', 'g6f4', 'g6g4', 'g6h4', 'g6e5', 'g6g5', 'g6i5', 'g6a6', 'g6b6', 'g6c6', 'g6d6', 'g6e6', 'g6f6', 'g6h8', 'f8f7', 'f8g8', 'f8i8']
        moves = ['b2b4', 'f7f5', 'c2c3', 'g8d5', 'a2a4', 'h8g6', 'f2f3', 'i8h6', 'h2h3']
        result = sf.legal_moves("capablanca", CAPA, moves)
        self.assertCountEqual(legals, result)
        self.assertIn("f8i8", result)

        moves = ['a2a4', 'f7f5', 'b2b3', 'g8d5', 'b1a3', 'i8h6', 'c1a2', 'h8g6', 'c2c4']
        result = sf.legal_moves("capablanca", CAPA, moves)
        self.assertIn("f8i8", result)

        moves = ['f2f4', 'g7g6', 'g1d4', 'j7j6', 'h1g3', 'b8a6', 'i1h3', 'h7h6']
        result = sf.legal_moves("capablanca", CAPA, moves)
        self.assertIn("f1i1", result)

        # Check that chess960 castling notation is used for otherwise ambiguous castling move
        # d1e1 is a normal king move, so castling has to be d1f1
        result = sf.legal_moves("diana", "rbnk1r/pppbpp/3p2/5P/PPPPPB/RBNK1R w KQkq - 2 3", [])
        self.assertIn("d1f1", result)

        # Test configurable piece perft
        legals = ['a3a4', 'b3b4', 'c3c4', 'd3d4', 'e3e4', 'f3f4', 'g3g4', 'e1e2', 'f1f2', 'b1a2', 'b1b2', 'b1c2', 'c1b2', 'c1c2', 'c1d2', 'a1a2', 'g1g2', 'd1c2', 'd1d2', 'd1e2']
        result = sf.legal_moves("yarishogi", sf.start_fen("yarishogi"), [])
        self.assertCountEqual(legals, result)

    def test_get_fen(self):
        result = sf.get_fen("chess", CHESS, [])
        self.assertEqual(result, CHESS)

        # incomplete FENs
        result = sf.get_fen("chess", "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR", [])
        self.assertEqual(result, "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1")
        result = sf.get_fen("chess", "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -", [])
        self.assertEqual(result, "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1")
        result = sf.get_fen("chess", "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w 1 2", [])
        self.assertEqual(result, "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 1 2")

        # alternative piece symbols
        result = sf.get_fen("janggi", "rhea1aehr/4k4/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/4K4/RHEA1AEHR w - - 0 1", [])
        self.assertEqual(result, JANGGI)

        result = sf.get_fen("capablanca", CAPA, [])
        self.assertEqual(result, CAPA)

        result = sf.get_fen("xiangqi", XIANGQI, [])
        self.assertEqual(result, XIANGQI)

        result = sf.get_fen("seirawan", SEIRAWAN, [])
        self.assertEqual(result, SEIRAWAN)

        # test idempotence for S-Chess960 gating flags
        fen1 = sf.get_fen("seirawan", SEIRAWAN, [], True)
        fen2 = sf.get_fen("seirawan", fen1, [], True)
        self.assertEqual(fen1, fen2)

        fen = "rnab1kbcnr/ppppPppppp/10/4q5/10/10/PPPPP1PPPP/RNABQKBCNR[p] b KQkq - 0 3"
        result = sf.get_fen("capahouse", CAPA, ["f2f4", "e7e5", "f4e5", "e8e5", "P@e7"])
        self.assertEqual(result, fen)

        fen0 = "reb1k2r/ppppqppp/2nb1n2/4p3/4P3/N1P2N2/PB1PQPPP/RE2KBHR[h] b KQkqac - 2 6"
        fen1 = "reb2rk1/ppppqppp/2nb1n2/4p3/4P3/N1P2N2/PB1PQPPP/RE2KBHR[h] w KQac - 3 7"
        result = sf.get_fen("seirawan", fen0, ["e8g8"])
        self.assertEqual(result, fen1)

        result = sf.get_fen("chess", CHESS, [], True, False, False)
        self.assertEqual(result, CHESS960)

        # test O-O-O
        fen = "rbkqnrbn/pppppppp/8/8/8/8/PPPPPPPP/RBKQNRBN w AFaf - 0 1"
        moves = ["d2d4", "f7f5", "e1f3", "h8g6", "h1g3", "c7c6", "c2c3", "e7e6", "b1d3", "d7d5", "d1c2", "b8d6", "e2e3", "d8d7", "c1a1"]
        result = sf.get_fen("chess", fen, moves, True, False, False)
        self.assertEqual(result, "r1k1nrb1/pp1q2pp/2pbp1n1/3p1p2/3P4/2PBPNN1/PPQ2PPP/2KR1RB1 b fa - 2 8")

        # passing should not affect castling rights
        fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
        result = sf.get_fen("passchess", fen, ["e1e1", "e8e8"])
        self.assertEqual(result, "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 2 2")

        # SFEN
        result = sf.get_fen("shogi", SHOGI, [], False, True)
        self.assertEqual(result, SHOGI_SFEN)

        # makruk FEN
        fen = "rnsmksnr/8/1pM~1pppp/p7/8/PPPP1PPP/8/RNSKMSNR b - - 0 3"
        result = sf.get_fen("makruk", MAKRUK, ["e3e4", "d6d5", "e4d5", "a6a5", "d5c6m"], False, False, True)
        self.assertEqual(result, fen)
        result = sf.get_fen("makruk", fen, [], False, False, True)
        self.assertEqual(result, fen)

        # makruk piece honor counting
        fen = "8/3k4/8/2K1S1P1/8/8/8/8 w - - 0 1"
        moves = ["g5g6m"]
        result = sf.get_fen("makruk", fen, moves, False, False, True)
        self.assertEqual(result, "8/3k4/6M~1/2K1S3/8/8/8/8 b - 88 8 1")

        fen = "8/2K3k1/5m2/4S1S1/8/8/8/8 w - 128 97 1"
        moves = ["e5f6"]
        result = sf.get_fen("makruk", fen, moves, False, False, True)
        self.assertEqual(result, "8/2K3k1/5S2/6S1/8/8/8/8 b - 44 8 1")

        # ignore count_started for piece honor counting
        fen = "8/3k4/8/2K1S1P1/8/8/8/8 w - - 0 1"
        moves = ["g5g6m"]
        result = sf.get_fen("makruk", fen, moves, False, False, True, -1)
        self.assertEqual(result, "8/3k4/6M~1/2K1S3/8/8/8/8 b - 88 8 1")

        fen = "8/2K3k1/5m2/4S1S1/8/8/8/8 w - 128 1 30"
        moves = ["e5f6"]
        result = sf.get_fen("makruk", fen, moves, False, False, True, 58)
        self.assertEqual(result, "8/2K3k1/5S2/6S1/8/8/8/8 b - 44 8 30")

        # makruk board honor counting
        fen = "3k4/2m5/8/4MP2/3KS3/8/8/8 w - - 0 1"
        moves = ["f5f6m"]
        result = sf.get_fen("makruk", fen, moves, False, False, True)
        self.assertEqual(result, "3k4/2m5/5M~2/4M3/3KS3/8/8/8 b - 128 0 1")

        fen = "3k4/2m5/5M~2/4M3/3KS3/8/8/8 w - 128 0 33"
        moves = ["d4d5"]
        result = sf.get_fen("makruk", fen, moves, False, False, True)
        self.assertEqual(result, "3k4/2m5/5M~2/3KM3/4S3/8/8/8 b - 128 1 33")

        fen = "3k4/2m5/5M~2/4M3/3KS3/8/8/8 w - 128 36 1"
        moves = ["d4d5"]
        result = sf.get_fen("makruk", fen, moves, False, False, True)
        self.assertEqual(result, "3k4/2m5/5M~2/3KM3/4S3/8/8/8 b - 128 37 1")

        fen = "3k4/2m5/5M~2/4M3/3KS3/8/8/8 w - 128 0 33"
        moves = ["d4d5"]
        result = sf.get_fen("makruk", fen, moves, False, False, True, -1)
        self.assertEqual(result, "3k4/2m5/5M~2/3KM3/4S3/8/8/8 b - 128 0 33")

        fen = "3k4/2m5/5M~2/4M3/3KS3/8/8/8 w - 128 7 33"
        moves = ["d4d5"]
        result = sf.get_fen("makruk", fen, moves, False, False, True, 58)
        self.assertEqual(result, "3k4/2m5/5M~2/3KM3/4S3/8/8/8 b - 128 8 33")

        # asean counting
        fen = "4k3/3r4/2K5/8/3R4/8/8/8 w - - 0 1"
        moves = ["d4d7"]
        result = sf.get_fen("asean", fen, moves, False, False, False)
        self.assertEqual(result, "4k3/3R4/2K5/8/8/8/8/8 b - 32 0 1")

        fen = "4k3/3r4/2K5/8/3R4/1P6/8/8 w - - 0 1"
        moves = ["d4d7"]
        result = sf.get_fen("asean", fen, moves, False, False, False)
        self.assertEqual(result, "4k3/3R4/2K5/8/8/1P6/8/8 b - - 0 1")

        fen = "8/2P1k3/2K5/8/8/8/8/8 w - - 0 1"
        moves = ["c7c8b"]
        result = sf.get_fen("asean", fen, moves, False, False, False)
        self.assertEqual(result, "2B5/4k3/2K5/8/8/8/8/8 b - 88 0 1")

        fen = "8/8/4K3/3Q4/1k1N4/5b2/8/8 w - - 0 1"
        moves = ["d4f3"]
        result = sf.get_fen("asean", fen, moves, False, False, False)
        self.assertEqual(result, "8/8/4K3/3Q4/1k6/5N2/8/8 b - 128 0 1")

        fen = "3Q4/4P3/4K3/3Q4/1k6/8/8/8 w - - 0 1"
        moves = ["e7e8q"]
        result = sf.get_fen("asean", fen, moves, False, False, False)
        self.assertEqual(result, "3QQ3/8/4K3/3Q4/1k6/8/8/8 b - - 0 1")

    def test_get_san(self):
        fen = "4k3/8/3R4/8/1R3R2/8/3R4/4K3 w - - 0 1"
        result = sf.get_san("chess", fen, "b4d4")
        self.assertEqual(result, "Rbd4")

        result = sf.get_san("chess", fen, "f4d4")
        self.assertEqual(result, "Rfd4")

        result = sf.get_san("chess", fen, "d2d4")
        self.assertEqual(result, "R2d4")

        result = sf.get_san("chess", fen, "d6d4")
        self.assertEqual(result, "R6d4")

        fen = "4k3/8/3R4/3P4/1RP1PR2/8/3R4/4K3 w - - 0 1"
        result = sf.get_san("chess", fen, "d2d4")
        self.assertEqual(result, "Rd4")

        fen = "1r2k3/P1P5/8/8/8/8/8/4K3 w - - 0 1"
        result = sf.get_san("chess", fen, "c7b8q")
        self.assertEqual(result, "cxb8=Q+")

        fen = "1r2k3/P1P5/8/8/8/8/8/4K3 w - - 0 1"
        result = sf.get_san("chess", fen, "c7b8q", False, sf.NOTATION_LAN)
        self.assertEqual(result, "c7xb8=Q+")

        result = sf.get_san("capablanca", CAPA, "e2e4")
        self.assertEqual(result, "e4")

        result = sf.get_san("capablanca", CAPA, "e2e4", False, sf.NOTATION_LAN)
        self.assertEqual(result, "e2-e4")

        result = sf.get_san("capablanca", CAPA, "h1i3")
        self.assertEqual(result, "Ci3")

        result = sf.get_san("sittuyin", SITTUYIN, "R@a1")
        self.assertEqual(result, "R@a1")

        fen = "3rr3/1kn3n1/1ss1p1pp/1pPpP3/6PP/p3KN2/2SSFN2/3R3R[] b - - 0 14"
        result = sf.get_san("sittuyin", fen, "c6c5")
        self.assertEqual(result, "Scxc5")

        fen = "7R/1r6/3k1np1/3s2N1/3s3P/4n3/6p1/2R3K1[] w - - 2 55"
        result = sf.get_san("sittuyin", fen, "h4h4f")
        self.assertEqual(result, "h4=F")

        fen = "k7/2K3P1/8/4P3/8/8/8/1R6[] w - - 0 1"
        result = sf.get_san("sittuyin", fen, "e5f6f")
        self.assertEqual(result, "e5f6=F")

        result = sf.get_san("shogi", SHOGI, "i3i4")
        self.assertEqual(result, "P-16")

        result = sf.get_san("shogi", SHOGI, "i3i4", False, sf.NOTATION_SHOGI_HOSKING)
        self.assertEqual(result, "P16")

        result = sf.get_san("shogi", SHOGI, "f1e2", False, sf.NOTATION_SHOGI_HOSKING)
        self.assertEqual(result, "G49-58")
        result = sf.get_san("shogi", SHOGI, "f1e2", False, sf.NOTATION_SHOGI_HODGES)
        self.assertEqual(result, "G4i-5h")
        result = sf.get_san("shogi", SHOGI, "f1e2", False, sf.NOTATION_SHOGI_HODGES_NUMBER)
        self.assertEqual(result, "G49-58")

        fen = "lnsgkgsnl/1r5b1/pppppp1pp/6p2/9/2P6/PP1PPPPPP/1B5R1/LNSGKGSNL w -"
        result = sf.get_san("shogi", fen, "b2h8", False, sf.NOTATION_SHOGI_HODGES)
        self.assertEqual(result, "Bx2b=")
        result = sf.get_san("shogi", fen, "b2h8+", False, sf.NOTATION_SHOGI_HODGES)
        self.assertEqual(result, "Bx2b+")

        fen = "lnsgkg1nl/1r5s1/pppppp1pp/6p2/9/2P6/PP1PPPPPP/7R1/LNSGKGSNL[Bb] w "
        result = sf.get_san("shogi", fen, "B@g7", False, sf.NOTATION_SHOGI_HODGES)
        self.assertEqual(result, "B*3c")
        result = sf.get_san("shogi", fen, "B@g7", False, sf.NOTATION_SHOGI_HODGES_NUMBER)
        self.assertEqual(result, "B*33")

        fen = "lnsgkg1nl/1r4s+B1/pppppp1pp/6p2/9/2P6/PP1PPPPPP/7R1/LNSGKGSNL[B] w "
        result = sf.get_san("shogi", fen, "h8g7", False, sf.NOTATION_SHOGI_HODGES)
        self.assertEqual(result, "+B-3c")

        fen = "lnk2gsnl/7b1/p1p+SGp1pp/6p2/1pP6/4P4/PP3PPPP/1S2G2R1/L2GK1bNL[PRppns] w "
        result = sf.get_san("shogi", fen, "d7d8", False, sf.NOTATION_SHOGI_HODGES)
        self.assertEqual(result, "+S-6b")

        result = sf.get_san("xiangqi", XIANGQI, "h1g3")
        self.assertEqual(result, "Hg3")

        result = sf.get_san("xiangqi", XIANGQI, "h1g3", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "H2+3")

        result = sf.get_san("xiangqi", XIANGQI, "c1e3")
        self.assertEqual(result, "Ece3")

        result = sf.get_san("xiangqi", XIANGQI, "c1e3", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "E7+5")

        result = sf.get_san("xiangqi", XIANGQI, "h3h10")
        self.assertEqual(result, "Cxh10")

        result = sf.get_san("xiangqi", XIANGQI, "h3h10", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "C2+7")

        result = sf.get_san("xiangqi", XIANGQI, "h3h5")
        self.assertEqual(result, "Ch5")

        # WXF notation does not denote check or checkmate
        fen = "4k4/4a3R/9/9/9/9/9/9/4K4/9 w - - 0 1"
        result = sf.get_san("xiangqi", fen, "i9e9", False)
        self.assertEqual(result, "Rxe9+")
        result = sf.get_san("xiangqi", fen, "i9e9", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "R1=5")
        result = sf.get_san("xiangqi", fen, "i9i10", False)
        self.assertEqual(result, "Ri10#")
        result = sf.get_san("xiangqi", fen, "i9i10", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "R1+1")

        # skip disambiguation for elephants and advisors, but not for pieces that require it
        fen = "rnbakabnr/9/1c5c1/p1p1p1p1p/4P4/1NB6/P1P1P3P/1C1A3C1/9/RNBAK4 w - - 0 1"
        result = sf.get_san("xiangqi", fen, "c5e3", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "E7-5")
        result = sf.get_san("xiangqi", fen, "d1e2", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "A6+5")
        result = sf.get_san("xiangqi", fen, "b5c7", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "H++7")
        result = sf.get_san("xiangqi", fen, "e6e7", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "P++1")
        result = sf.get_san("xiangqi", fen, "e4e5", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "P-+1")

        # Tandem pawns
        fen = "rnbakabnr/9/1c5c1/p1p1P1p1p/4P4/9/P3P3P/1C5C1/9/RNBAKABNR w - - 0 1"
        result = sf.get_san("xiangqi", fen, "e7d7", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "15=6")
        result = sf.get_san("xiangqi", fen, "e6d6", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "25=6")
        result = sf.get_san("xiangqi", fen, "e4e5", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "35+1")

        # use tandem pawn notation for pair of tandem pawns
        fen = "5k3/9/3P5/3P1P1P1/5P3/9/9/9/9/4K4 w - - 0 1"
        result = sf.get_san("xiangqi", fen, "d7e7", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "26=5")
        result = sf.get_san("xiangqi", fen, "f6e6", False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, "24=5")

        fen = "1rb1ka2r/4a4/2ncb1nc1/p1p1p1p1p/9/2P6/P3PNP1P/2N1C2C1/9/R1BAKAB1R w - - 1 7"
        result = sf.get_san("xiangqi", fen, "c3e2")
        self.assertEqual(result, "Hce2")

        result = sf.get_san("xiangqi", fen, "c3d5")
        self.assertEqual(result, "Hd5")

        result = sf.get_san("janggi", JANGGI, "b1c3", False, sf.NOTATION_JANGGI)
        self.assertEqual(result, "H02-83")

        fen = "1b1aa2b1/5k3/3ncn3/1pp1pp3/5r2p/9/P1PPB1PPB/2N1CCN1c/9/R2AKAR2 w - - 19 17"
        result = sf.get_san("janggi", fen, "d1e2", False, sf.NOTATION_SAN)
        self.assertEqual(result, "Ade2")

        fen = "1Pbcka3/3nNn1c1/N2CaC3/1pB6/9/9/5P3/9/4K4/9 w - - 0 23"
        result = sf.get_san("janggi", fen, "f8f10", False, sf.NOTATION_SAN)
        self.assertEqual(result, "Cfxf10")

        fen = "rnsm1s1r/4n1k1/1ppppppp/p7/2PPP3/PP3PPP/4N2R/RNSKMS2 b - - 1 5"
        result = sf.get_san("makruk", fen, "f8f7")
        self.assertEqual(result, "Sf7")

        fen = "4k3/8/8/4S3/8/2S5/8/4K3 w - - 0 1"
        result = sf.get_san("makruk", fen, "e5d4")
        self.assertEqual(result, "Sed4")

        result = sf.get_san("makruk", fen, "c3d4")
        self.assertEqual(result, "Scd4")

        fen = "4k3/8/8/3S4/8/3S4/8/4K3 w - - 0 1"
        result = sf.get_san("makruk", fen, "d3d4")
        self.assertEqual(result, "Sd4")

        UCI_moves = ["e2e4", "e7e5", "g1f3", "b8c6h", "f1c4", "f8c5e"]
        SAN_moves = ["e4", "e5", "Nf3", "Nc6/H", "Bc4", "Bc5/E"]

        fen = SEIRAWAN
        for i, move in enumerate(UCI_moves):
            result = sf.get_san("seirawan", fen, move)
            self.assertEqual(result, SAN_moves[i])
            fen = sf.get_fen("seirawan", SEIRAWAN, UCI_moves[:i + 1])

        result = sf.get_san("seirawan", fen, "e1g1")
        self.assertEqual(result, "O-O")

        result = sf.get_san("seirawan", fen, "e1g1h")
        self.assertEqual(result, "O-O/He1")
        result = sf.get_san("seirawan", fen, "e1g1e")
        self.assertEqual(result, "O-O/Ee1")

        result = sf.get_san("seirawan", fen, "h1e1h")
        self.assertEqual(result, "O-O/Hh1")
        result = sf.get_san("seirawan", fen, "h1e1e")
        self.assertEqual(result, "O-O/Eh1")

    def test_get_san_moves(self):
        UCI_moves = ["e2e4", "e7e5", "g1f3", "b8c6h", "f1c4", "f8c5e"]
        SAN_moves = ["e4", "e5", "Nf3", "Nc6/H", "Bc4", "Bc5/E"]
        result = sf.get_san_moves("seirawan", SEIRAWAN, UCI_moves)
        self.assertEqual(result, SAN_moves)

        UCI_moves = ["c3c4", "g7g6", "b2h8"]
        SAN_moves = ["P-76", "P-34", "Bx22="]
        result = sf.get_san_moves("shogi", SHOGI, UCI_moves)
        self.assertEqual(result, SAN_moves)

        UCI_moves = ["h3e3", "h10g8", "h1g3", "c10e8", "a1a3", "i10h10"]
        SAN_moves = ["C2=5", "H8+7", "H2+3", "E3+5", "R9+2", "R9=8"]
        result = sf.get_san_moves("xiangqi", XIANGQI, UCI_moves, False, sf.NOTATION_XIANGQI_WXF)
        self.assertEqual(result, SAN_moves)

        UCI_moves = ["e2e4", "d7d5", "f1a6+", "d8d6"]
        SAN_moves = ["e4", "d5", "Ba6=A", "Qd6"]
        result = sf.get_san_moves("shogun", SHOGUN, UCI_moves)
        self.assertEqual(result, SAN_moves)

    def test_gives_check(self):
        result = sf.gives_check("capablanca", CAPA, [])
        self.assertFalse(result)

        result = sf.gives_check("capablanca", CAPA, ["e2e4"])
        self.assertFalse(result)

        moves = ["g2g3", "d7d5", "a2a3", "c8h3"]
        result = sf.gives_check("capablanca", CAPA, moves)
        self.assertTrue(result)

    def test_game_result(self):
        result = sf.game_result("chess", CHESS, ["f2f3", "e7e5", "g2g4", "d8h4"])
        self.assertEqual(result, -sf.VALUE_MATE)

        # shogi pawn drop mate
        result = sf.game_result("shogi", "lnsg3nk/1r2b1gs1/ppppppp1p/7N1/7p1/9/PPPPPPPP1/1B5R1/LNSGKGS1L[P] w 0 1", ["P@i8"])
        self.assertEqual(result, sf.VALUE_MATE)

        # losers checkmate
        result = sf.game_result("losers", CHESS, ["f2f3", "e7e5", "g2g4", "d8h4"])
        self.assertEqual(result, sf.VALUE_MATE)

        # suicide stalemate
        result = sf.game_result("suicide", "8/8/8/7p/7P/8/8/8 w - - 0 1", [])
        self.assertEqual(result, sf.VALUE_DRAW)
        result = sf.game_result("suicide", "8/8/8/7p/7P/7P/8/8 w - - 0 1", [])
        self.assertEqual(result, -sf.VALUE_MATE)
        result = sf.game_result("suicide", "8/8/8/7p/7P/8/8/n7 w - - 0 1", [])
        self.assertEqual(result, sf.VALUE_MATE)

        # atomic check- and stalemate
        # checkmate
        result = sf.game_result("atomic", "BQ6/Rk6/8/8/8/8/8/4K3 b - - 0 1", [])
        self.assertEqual(result, -sf.VALUE_MATE)
        # stalemate
        result = sf.game_result("atomic", "KQ6/Rk6/2B5/8/8/8/8/8 b - - 0 1", [])
        self.assertEqual(result, sf.VALUE_DRAW)

    def test_is_immediate_game_end(self):
        result = sf.is_immediate_game_end("capablanca", CAPA, [])
        self.assertFalse(result[0])

        # bikjang (facing kings)
        moves = "e2e3 e9f9 h3d3 e7f7 i1i3 h10i8 i3h3 c10e7 h3h8 i10i9 h8b8 i9g9 d3f3 f9e9 f3f10 e7c10 f10c10 b10c8 c10g10 g9f9 b8c8 a10b10 b3f3 f9h9 a1a2 h9f9 a2d2 b10b9 d2d10 e9d10 c8c10 d10d9 f3f9 i8g9 f9b9 a7a6 g10g7 f7f6 e4e5 c7d7 g1e4 i7i6 e4b6 d9d8 c10c8 d8d9 b9g9 d7d6 b6e8 i6h6 e5e6 f6e6 c1e4 a6b6 e4b6 d6d5 c4c5 d9d10 e3d3 h6i6 c5c6 d5c5"
        result = sf.is_immediate_game_end("janggi", JANGGI, moves.split())
        self.assertFalse(result[0])

        moves = "e2e3 e9f9 h3d3 e7f7 i1i3 h10i8 i3h3 c10e7 h3h8 i10i9 h8b8 i9g9 d3f3 f9e9 f3f10 e7c10 f10c10 b10c8 c10g10 g9f9 b8c8 a10b10 b3f3 f9h9 a1a2 h9f9 a2d2 b10b9 d2d10 e9d10 c8c10 d10d9 f3f9 i8g9 f9b9 a7a6 g10g7 f7f6 e4e5 c7d7 g1e4 i7i6 e4b6 d9d8 c10c8 d8d9 b9g9 d7d6 b6e8 i6h6 e5e6 f6e6 c1e4 a6b6 e4b6 d6d5 c4c5 d9d10 e3d3 h6i6 c5c6 d5c5 d3d3"
        result = sf.is_immediate_game_end("janggi", JANGGI, moves.split())
        self.assertTrue(result[0])
        self.assertEqual(result[1], -sf.VALUE_MATE)

    def test_is_optional_game_end(self):
        result = sf.is_optional_game_end("capablanca", CAPA, [])
        self.assertFalse(result[0])

        # sittuyin stalemate due to optional promotion
        result = sf.is_optional_game_end("sittuyin", "1k4PK/3r4/8/8/8/8/8/8[] w - - 0 1", [])
        self.assertTrue(result[0])
        self.assertEqual(result[1], sf.VALUE_DRAW)

    def test_has_insufficient_material(self):
        for variant, positions in variant_positions.items():
            for fen, expected_result in positions.items():
                result = sf.has_insufficient_material(variant, fen, [])
                self.assertEqual(result, expected_result, "{}: {}".format(variant, fen))

    def test_validate_fen(self):
        # valid
        for variant, positions in variant_positions.items():
            for fen in positions:
                self.assertEqual(sf.validate_fen(fen, variant), sf.FEN_OK, "{}: {}".format(variant, fen))
        # invalid
        for variant, positions in invalid_variant_positions.items():
            for fen in positions:
                self.assertNotEqual(sf.validate_fen(fen, variant), sf.FEN_OK, "{}: {}".format(variant, fen))
        # chess960
        self.assertEqual(sf.validate_fen(CHESS960, "chess", True), sf.FEN_OK, "{}: {}".format(variant, fen))
        self.assertEqual(sf.validate_fen("nrbqbkrn/pppppppp/8/8/8/8/PPPPPPPP/NRBQBKRN w BGbg - 0 1", "newzealand", True), sf.FEN_OK, "{}: {}".format(variant, fen))
        # all variants starting positions
        for variant in sf.variants():
            fen = sf.start_fen(variant)
            self.assertEqual(sf.validate_fen(fen, variant), sf.FEN_OK, "{}: {}".format(variant, fen))

if __name__ == '__main__':
    unittest.main(verbosity=2)
