Community variant
Shatar (custom) v2
Remake the original to make it closer to modern rules
This is a user-catalogued casual variant. Technical details such as board size, FEN, pieces, and hand rules are defined in the Fairy-Stockfish variants.ini block below.
Generated rule overview
This variant inherits its base rules from `chess` and overrides the settings shown below.
Board and setup
Pieces and movement
- The piece set used on the board is: king (k), bers (q), rook (r), bishop (b), knight (n) and pawn (p).
Move rules
- Castling is not allowed.
- Pawn double-step moves are enabled.
Promotion
- Promotions are available in the configured promotion zones. The the promotion region for White is all squares on rank 8 and the promotion region for Black is all squares on rank 1.
- The pieces that can promote are: pawn (p).
- Promotion choices are both sides: bers (q).
- Pawn promotion is mandatory when a pawn reaches the last rank/required zone.
Winning and losing
- Shatar-specific mating rules are enabled.
Fairy-Stockfish rules
[shatar_v2:chess]
pawn = p
knight = n
bishop = b
rook = r
bers = q
king = k
queen = -
startFen = rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1
castling = false
# Only d- and e-pawns can make the initial double step
doubleStep = true
doubleStepRegionWhite = d2 e2
doubleStepRegionBlack = d7 e7
# Promotion to Baras
promotionPieceTypes = q
mandatoryPawnPromotion = true
promotionRegionWhite = *8
promotionRegionBlack = *1
shatarMateRule = true