Crazyhouse

Crazyhouse

Captured pieces join the captor’s reserve. Instead of moving, you may drop a piece from your hand onto any empty square. The most popular chess variant online.

Setup

Board: Standard 8×8.

Setup: Standard chess setup. Each player begins with an empty hand (reserve).

FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1

Rules

• When you capture an opponent’s piece, it switches colour and enters your hand (reserve).
• Instead of making a normal move, you may drop a piece from your hand onto any empty square.
• Pawns cannot be dropped on the first or eighth rank (no drop-promotions).
• Promoted pieces revert to pawns when captured.
• Dropped pieces have full movement on the following turn.
• All other standard chess rules apply (check, castling, en passant).

Win Condition

Checkmate the opponent’s King.

Strategy

Piece drops create explosive tactical possibilities — no piece is ever truly lost. Material advantage matters less than board control and king safety. Early attacks are common because captured pieces immediately reinforce the attack. Pawn structure is less important since pawns can appear anywhere.

Attribution

Derives from Shogi’s drop mechanic applied to Western chess. Documented in Pritchard, The Encyclopedia of Chess Variants (1994) and Pritchard, The Classified Encyclopedia of Chess Variants (2007) under “Chessgi” / “Crazyhouse”. Standardised rules from Lichess (lichess.org/variant/crazyhouse) and FICS, which popularised the variant from the 1990s onward. Public domain.