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Chess / gothic chess variants

These new variants are just opening positions w/ a twist. Normal rules apply. In castling king is in the middle of rooks. Castling in standard: "KQkq". Others use X-FEN. Chess18, Chess324, FRC and DFRC are already invented. Some variants are capped to 1000000, as they don't fit into RAM. All files are in variants.zip

chess18

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Standard
  • BishopRule: Legal
  • Positions: 18
  • Capped: False
  • File: chess18.txt

chess12

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Standard
  • BishopRule: Illegal
  • Positions: 12
  • Capped: False
  • File: chess12.txt

chess30

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Standard
  • BishopRule: Any
  • Positions: 30
  • Capped: False
  • File: chess30.txt

chess960

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Must
  • BishopRule: Legal
  • Positions: 960
  • Capped: False
  • File: chess960.txt

chess720

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Must
  • BishopRule: Illegal
  • Positions: 720
  • Capped: False
  • File: chess720.txt

chess1680

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Must
  • BishopRule: Any
  • Positions: 1680
  • Capped: False
  • File: chess1680.txt

chess1920

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: No
  • BishopRule: Legal
  • Positions: 1920
  • Capped: False
  • File: chess1920.txt

chess1440

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: No
  • BishopRule: Illegal
  • Positions: 1440
  • Capped: False
  • File: chess1440.txt

chess3360

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: No
  • BishopRule: Any
  • Positions: 3360
  • Capped: False
  • File: chess3360.txt

chess2880

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Any
  • BishopRule: Legal
  • Positions: 2880
  • Capped: False
  • File: chess2880.txt

chess2160

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Any
  • BishopRule: Illegal
  • Positions: 2160
  • Capped: False
  • File: chess2160.txt

chess5040

  • Variant: Chess
  • Board: 8x8
  • Double: False
  • Castling: Any
  • BishopRule: Any
  • Positions: 5040
  • Capped: False
  • File: chess5040.txt

chess324

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Standard
  • BishopRule: Legal
  • Positions: 324
  • Capped: False
  • File: chess324.txt

chess144

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Standard
  • BishopRule: Illegal
  • Positions: 144
  • Capped: False
  • File: chess144.txt

chess900

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Standard
  • BishopRule: Any
  • Positions: 900
  • Capped: False
  • File: chess900.txt

chess921600

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Must
  • BishopRule: Legal
  • Positions: 921600
  • Capped: False
  • File: chess921600.txt

chess518400

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Must
  • BishopRule: Illegal
  • Positions: 518400
  • Capped: False
  • File: chess518400.txt

chess-8x8-2x-must-any-capped-1000000

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Must
  • BishopRule: Any
  • Positions: 1000000
  • Capped: True
  • File: chess-8x8-2x-must-any-capped-1000000.txt

chess-8x8-2x-no-legal-capped-1000000

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: No
  • BishopRule: Legal
  • Positions: 1000000
  • Capped: True
  • File: chess-8x8-2x-no-legal-capped-1000000.txt

chess-8x8-2x-no-illegal-capped-1000000

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: No
  • BishopRule: Illegal
  • Positions: 1000000
  • Capped: True
  • File: chess-8x8-2x-no-illegal-capped-1000000.txt

chess-8x8-2x-no-any-capped-1000000

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: No
  • BishopRule: Any
  • Positions: 1000000
  • Capped: True
  • File: chess-8x8-2x-no-any-capped-1000000.txt

chess-8x8-2x-any-legal-capped-1000000

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Any
  • BishopRule: Legal
  • Positions: 1000000
  • Capped: True
  • File: chess-8x8-2x-any-legal-capped-1000000.txt

chess-8x8-2x-any-illegal-capped-1000000

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Any
  • BishopRule: Illegal
  • Positions: 1000000
  • Capped: True
  • File: chess-8x8-2x-any-illegal-capped-1000000.txt

chess-8x8-2x-any-any-capped-1000000

  • Variant: Chess
  • Board: 8x8
  • Double: True
  • Castling: Any
  • BishopRule: Any
  • Positions: 1000000
  • Capped: True
  • File: chess-8x8-2x-any-any-capped-1000000.txt

gothic720

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Standard
  • BishopRule: Legal
  • Positions: 720
  • Capped: False
  • File: gothic720.txt

gothic540

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Standard
  • BishopRule: Illegal
  • Positions: 540
  • Capped: False
  • File: gothic540.txt

gothic1260

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Standard
  • BishopRule: Any
  • Positions: 1260
  • Capped: False
  • File: gothic1260.txt

gothic84000

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Must
  • BishopRule: Legal
  • Positions: 84000
  • Capped: False
  • File: gothic84000.txt

gothic67200

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Must
  • BishopRule: Illegal
  • Positions: 67200
  • Capped: False
  • File: gothic67200.txt

gothic151200

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Must
  • BishopRule: Any
  • Positions: 151200
  • Capped: False
  • File: gothic151200.txt

gothic168000

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: No
  • BishopRule: Legal
  • Positions: 168000
  • Capped: False
  • File: gothic168000.txt

gothic134400

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: No
  • BishopRule: Illegal
  • Positions: 134400
  • Capped: False
  • File: gothic134400.txt

gothic302400

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: No
  • BishopRule: Any
  • Positions: 302400
  • Capped: False
  • File: gothic302400.txt

gothic252000

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Any
  • BishopRule: Legal
  • Positions: 252000
  • Capped: False
  • File: gothic252000.txt

gothic201600

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Any
  • BishopRule: Illegal
  • Positions: 201600
  • Capped: False
  • File: gothic201600.txt

gothic453600

  • Variant: Gothic
  • Board: 10x8
  • Double: False
  • Castling: Any
  • BishopRule: Any
  • Positions: 453600
  • Capped: False
  • File: gothic453600.txt

gothic518400

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Standard
  • BishopRule: Legal
  • Positions: 518400
  • Capped: False
  • File: gothic518400.txt

gothic291600

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Standard
  • BishopRule: Illegal
  • Positions: 291600
  • Capped: False
  • File: gothic291600.txt

gothic-10x8-2x-standard-any-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Standard
  • BishopRule: Any
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-standard-any-capped-1000000.txt

gothic-10x8-2x-must-legal-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Must
  • BishopRule: Legal
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-must-legal-capped-1000000.txt

gothic-10x8-2x-must-illegal-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Must
  • BishopRule: Illegal
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-must-illegal-capped-1000000.txt

gothic-10x8-2x-must-any-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Must
  • BishopRule: Any
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-must-any-capped-1000000.txt

gothic-10x8-2x-no-legal-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: No
  • BishopRule: Legal
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-no-legal-capped-1000000.txt

gothic-10x8-2x-no-illegal-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: No
  • BishopRule: Illegal
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-no-illegal-capped-1000000.txt

gothic-10x8-2x-no-any-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: No
  • BishopRule: Any
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-no-any-capped-1000000.txt

gothic-10x8-2x-any-legal-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Any
  • BishopRule: Legal
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-any-legal-capped-1000000.txt

gothic-10x8-2x-any-illegal-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Any
  • BishopRule: Illegal
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-any-illegal-capped-1000000.txt

gothic-10x8-2x-any-any-capped-1000000

  • Variant: Gothic
  • Board: 10x8
  • Double: True
  • Castling: Any
  • BishopRule: Any
  • Positions: 1000000
  • Capped: True
  • File: gothic-10x8-2x-any-any-capped-1000000.txt

Total positions

  • Chess: 8461588
  • Gothic: 12626920
  • Total: 21088508

Total variants

  • Chess: 24
  • Gothic: 24
  • Total: 48

License

MIT ( totally free to use for whatever )

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Opening fens for chess + gothic

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variants Latest
Sep 30, 2022

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