https://rowan441.github.io/1dchess/chess.html

[white-king] [white-knig] [white-rook] [black-king] [black-knig]
[black-rook]
1D-Chess
By: Rowan Monk
Claim Draw Restart Game

1D-Chess

1d-chess is a new variant where you can play the beautiful game
without all those unneccessary and complicated extra dimensions. Play
as white against the AI. You might initally find it more difficult
than expected, but assming optimal play, is there a forced win for
white?

Mouse over to reveal answer: Try this line: N4 N5, N6 K7, R4 K6, R2
K7, R5++

Rules

There are three pieces in 1d-chess:

King:

Can move one square in any direction.

Knight:

Can move 2 squares forward or backward. (jumping over any pieces in
the way)

Rook:

Can move in a straight line in any direction.

Win by checkmating the enemy king. This occurs when the enemy king is
in check (under attack by one of your pieces) and there are no legal
moves for the opponent to get their king out of check.

Careful! A draw can occur if:

  * A player is not in check and there are no legal moves for them to
    play (Stalemate)
  * The same board position is repeated 3 times in a game. (3 Fold
    Repetition)
  * There are only kings left on the board, thus it is impossible to
    checkmate the opponent (Insufficient Material)

Credits

This chess variant was first described by Martin Gardner in the
Mathematical Games column of the July 1980 issue of Scientific
American
See The column on JSTOR