Doublemove Chess
Invented by: Fred Galvin, 1957
Except for white's first move, players make two moves per turn. Win by capturing the king.
Game hierarchy
• Game
• Generic Chess
• Generic x8
• Generic 8x8
• Chess
• Doublemove Chess
Board
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
Piece Types
| Internal Name | Name | Notation | Added By | Notes |
| King | King | K | Generic Chess | can castle; extinction loses |
| Pawn | Pawn | P | Generic Chess | can promote; pawn structure evaluation |
| Rook | Rook | R | Chess | castling partner; open file bonus |
| Bishop | Bishop | B | Chess | colorbinding evaluation; outpost bonus |
| Knight | Knight | N | Chess | outpost bonus |
| Queen | Queen | Q | Chess | |
Game Variables
Name = "Doublemove Chess"
Invented = "1957"
InventedBy = "Fred Galvin"
NumberOfSquareColors = 2
FENFormat = "{array} {current player} {castling} {en-passant} {half-move clock} {turn number}"
FENStart = "#{Array} w #default #default 0 1"
Array = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR"
DeduplicateMoves = false
StaticExchangeEvaluation = true
Declared in Generic Chess:
StalemateResult = Draw
PromotionRule = Standard
PromotionTypes = "QRNB"
BareKing = false
EnPassant = true
PromotingType = Pawn
CastlingType = King
Declared in Generic x8:
PawnDoubleMove = true
Declared in Generic 8x8:
Castling = Standard
Rules
DoubleMoveCompletionRule
BasicPromotionRule
Move50Rule
CastlingRule
ExtinctionRule
RepetitionDrawRule
Evaluations
PawnStructureEvaluation
DevelopmentEvaluation
LowMaterialEvaluation
ColorbindingEvaluation
RookTypeEvaluation
OutpostEvaluation
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