1D Chess

[Desmond]

1D Chess is a variant of chess that is played along a single file, on the board shown below the a-file.

The pieces cannot move off the a-file.
The king moves as in normal chess, 1 space at a time.
The rook moves as in normal chess, as far as it can along the file.
The knight jumps exactly 2 squares.
Other rules of the game are the same - checkmate, stalemate etc.

With best play, what is the result? What is the longest game with best play?

To get you started, white has exactly 4 moves s/he can make from the starting position. 1.Na4, 1.Ra4, 1.Ra5, or 1.Rxa6.

k7/n7/r7/8/8/R7/N7/K7 w - - 0 1

[whatteaux]

There's an interesting analysis herre: http://chessexpress.blogspot.com/2021/02/one-dimensional-chess.html

[Andrew Hardegen]

Here's a chess variant that I can solve!

[Desmond]

I posted the solution here (https://www.linkedin.com/pulse/1d-chess-puzzle-brian-thomas).

[Capablanca-Fan]

↑↑ Thanks, there are more subtleties than I thought.