Diamond Chess
Invented by: J. A. Porterfield Rynd, 1886
Chess with the board rotated 45 degrees and a different opening position. Only the pawns move differently.
Game hierarchy
• Game
• Generic Chess
• Diamond Chess
Board
FEN: krbp4/rqnp4/nbpp4/pppp4/4PPPP/4PPBN/4PNQR/4PBRK w - - 0 1
Piece Types
| Internal Name | Name | Notation | Added By | Notes |
| King | King | K | Generic Chess | royal |
| Diamond Pawn | Pawn | P | Diamond Chess | can promote |
| Rook | Rook | R | Diamond Chess | open file bonus; trap king on back rank bonus |
| Bishop | Bishop | B | Diamond Chess | colorbinding evaluation |
| Knight | Knight | N | Diamond Chess | |
| Queen | Queen | Q | Diamond Chess | trap king on back rank bonus |
Game Variables
Name = "Diamond Chess"
Invented = "1886"
InventedBy = "J. A. Porterfield Rynd"
NumberOfSquareColors = 2
FENFormat = "{array} {current player} {castling} {en-passant} {half-move clock} {turn number}"
FENStart = "#{Array} w #default #default 0 1"
Array = "krbp4/rqnp4/nbpp4/pppp4/4PPPP/4PPBN/4PNQR/4PBRK"
DeduplicateMoves = false
StaticExchangeEvaluation = true
Declared in Generic Chess:
StalemateResult = Draw
PromotionRule = Custom
PromotionTypes = "QRBN"
BareKing = false
EnPassant = false
PromotingType = Pawn (Diamond Pawn)
CastlingType = King
Declared in Diamond Chess:
Orientation =
Rules
MoveCompletionDefaultRule
CheckmateRule
Move50Rule
BasicPromotionRule
RepetitionDrawRule
Evaluations
DevelopmentEvaluation
LowMaterialEvaluation
ColorbindingEvaluation
RookTypeEvaluation
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