How to play
Double Chess

Played on a double width board, 12x16, with a duplicate set of pieces.

Introduction

Double Chess is played on an 8 x 16 board (i.e. two boards) with 2 sets of pieces. A third queen is substitured for the second King though. All rules remain the same as Standard Chess with the exception of additional castling rules to accommodate four Rooks starting on the home rank

Starting Position

The board double the width, and the game starts with one King and three Queens each.
Board is interactive - make a move

Moves of the Pieces

The moves of the pieces remains the same as Standard Chess.

Pawn Promotion

Pawn promotion rules remains the same as Standard Chess.

Castling

When inside castling on queenside, the King moves to G file, and the rook the the H file. When castling on the kingside side, the King moves to the K file and the Rook to the J file.

White inside castling
Board is interactive - make a move

When outside castling on queenside, the King moves to E file, and the rook the the F file. When castling on the kingside side, the King moves to the M file and the Rook to the I file.

White outside castling
Board is interactive - make a move

En Passant

En passant rules remains the same as Standard Chess.

Check and Checkmate

Check and Checkmate rules remain the same as Standard Chess.

Stalemate

Stalemate conditions remain the same as Standard Chess.

Draw

Draw conditions remain the same as Standard Chess.

Winning

Winning conditions remain the same as Standard Chess.

Attribution