Community variant
Hoppel-poppel++
Variant in the spirit of Hoppel-Poppel and New Zealand, white rooks capture like knights, knights like bishops, bishops like rooks, black pieces cycle in the opposite direction, rooks capture like bishops, knights like rooks, bishops like knights.
In the standard piece set piece at the bottom is how the piece moves, at the top is how it captures.
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), queen (q), rook-knight (r), custom piece 1 (b), knibis (n), pawn (p), custom piece 2 (z), kni-rook (x) and biskni (y).
- custom piece 1 (b) is a custom piece with Betza movement `mBcR`.
- custom piece 2 (z) is a custom piece with Betza movement `mRcB`.
Promotion
- The pieces that can promote are: pawn (p).
- Promotion choices are White: custom piece 1 (b), knibis (n), rook-knight (r) and queen (q) and Black: kni-rook (x), biskni (y), custom piece 2 (z) and queen (q).
Piece movement
These diagrams show custom pieces and known Fairy-Stockfish built-in fairy pieces from White's perspective on a compact preview board. Some special moves, especially hoppers and game-state-dependent moves, can still depend on blockers or game state.
mBcR
mRcB
move
capture
move or capture
initial only
hopper target
Fairy-Stockfish rules
[hoppelplusplus:chess]
pieceToCharTable = PNBRQ..............Kpxyzq..............k
rookni = r
knibis = n
kniroo = x
biskni = y
customPiece1 = b:mBcR
customPiece2 = z:mRcB
promotionPieceTypesWhite = bnrq
promotionPieceTypesBlack = xyzq
castlingRookPieces = rz
startFen = zxyqkyxz/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1