Chess played on a
cylindrical board. To avoid pieces sliding off the board,
cylinder chess is usually played on a flat board, with the convention that the left and right sides of the board are assumed to be joined. Since the
a and
h files are considered to be adjacent, a game of cylindrical chess might begin
1. d4 g6+!, the
check being given by Black's f8
bishop. Some players disallow
castling in cylindrical chess, but usually all rules are the same as standard chess.
Here is a cylindrical chess problem by Augustus Mongredien:
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| | |BP | | | | |WR |
+---+---+---+---+---+---+---+---+
| |BK |BP | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | |WR |
+---+---+---+---+---+---+---+---+
|WK | | | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
White is to move and
checkmate in two. Here's the solution, printed backwards:
knar htfif
eht ot koor emas eht evom, sevom kcalb retfa; detrats ti erehw sdne
ti taht os yllatnoziroh serauqs thgie knar htruof eht no koor eht evoM