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4d Chess

This is a very bad chess program that doesn’t really work. I made it after finding a 4d chessboard on Tabletop Simulator. What I found most interesting was that this 4d chess could be played on a regular 8x8 chessboard. This was accomplished by using a table-of-tables approach (or matrix-of-matrices if you’d rather).

How to play

This chess ““program”” provides no utilities like turn order, check or check mate, pawn promotion, or capturing your own pieces (however it does disallow illegal moves). I would recommend this game be played hotseat or one player “hosts” the game and does the moves for another. You have the standard white-plays-first of chess.

I would say checkmate is the only win-condition, but I am unsure a checkmate is even possible. Other poorly thought out (never tested) game modes could be:

Animal Rights: Play until all of someone’s knights are captured.
Tower Defense: Play until all of someone’s rooks are captured.
Creative Name 1: Play until all of someone’s bishops are captured.
Creative Name 2: Play until all of someone’s pawns are captured.
Variety: Play until someone has captured at least one rook, one knight, one bishop, and one pawn.

What are all these colors and symbols?

In an effort to extend chess notation to four dimensions you can find a bunch of symbols and colors along the chess squares.

1, 2, 3, and 4 are the outer vertical checkering.
A, B, C, and D are the outer horizontal checkering.
# and - are the inner vertical checkering.
^ and * are the inner horizontal checkering.

The numbers preceded by i are the spots index in the 4 dimensional array that represents the chessboard.

Piece move extensions

Pawn: Can move 1 unit in any of the vertical dimensions and optionally 1 unit in any other dimension (to mimic diagonal captures).
Knight: Can only move 1 unit in any dimension and 2 units in a different dimension.
Rook: Can move any amount of units in any single dimension.
Bishop: Can move any amount of units in exactly 2 dimensions simultaneously.
Queen: Has the Rook and Bishop’s moveset combined.
King: Can move in 1 unit in any number of dimensions simultaneously.