Andernach chess

Andernach chess is a chess variant in which a piece making a capture (except kings) changes colour.[1] For instance, if a white bishop on a2 were to capture a black knight on g8, the result would be a black bishop on g8. Non-capturing moves are played as in orthodox chess. If a pawn captures on eighth rank, it is promoted first and then changes colour.

The game was named after the German town of Andernach, which is the site of annual meetings of fairy chess enthusiasts. It was during the 1993 meeting there that Andernach chess was introduced with a chess problem composing tournament for Andernach problems. It has since become a popular variant in problem composition, though it has not yet become popular as a game-playing variant.

Example problem

Michel Caillaud
Comm. Andernach TT, 1993
abcdefgh
8a8 black rookb8 black knightc8 black bishopd8 black queene8 black kingf8 black bishopg8 black knighth8 black rook8
7a7 black pawnb7 black pawnc7 black pawnd7e7 black pawnf7 black pawng7 black pawnh7 black pawn7
6a6b6c6d6e6f6g6h66
5a5b5c5d5e5f5g5h55
4a4b4c4d4e4f4g4h44
3a3b3c3d3e3f3g3h33
2a2 white pawnb2 white pawnc2 white pawnd2 white pawne2 white pawnf2 white pawng2 white pawnh2 white pawn2
1a1 white rookb1 white knightc1 white bishopd1 white queene1 white kingf1 white bishopg1h1 white rook1
abcdefgh
Shortest proof game in 3.0 (Andernach chess)

An example Andernach chess problem is shown in the diagram. The task is to find a proof game, which would last three moves and lead to the position shown. The solution is:

1. Nf3 Nc6 2. Ne5 Nxe5(=wN)

The black knight turns into a white knight after capture on e5. White can now move this knight.

3. Nxd7(=bN)

This time a white knight turns into a black knight.

3... Nb8 (see diagram)

Variations

The precursor of Andernach chess was Tibetan chess, in which the black units (called lamas) change colour and piece type when capturing white pieces of a different type. As in Andernach chess, the king is not affected by capture. For example, if a black pawn on d7 captures a white queen on c6, it becomes a white queen and can be moved by White on the next move.[2] This game is not related to Chandraki, a chess variant that may have been played in Tibet.[3]

A variant on Andernach chess is anti-Andernach, in which pieces except kings change colour after non-captures, but stay the same colour after a capture. There is also super-Andernach in which all pieces except kings change colour after every move, whether a capture or not. Super-Andernach was introduced by John Rice in The Problemist Supplement in March 2006.

See also

References

  1. ^ Andernach Chess by Joost de Heer and Otto Janko
  2. ^ Pritchard (1994), p. 314, Tibetan Chess (III)
  3. ^ Chandraki, the Tibetan Chess by Jean-Louis Cazaux.
  • Pritchard, D. B. (1994). The Encyclopedia of Chess Variants. Games & Puzzles Publications. ISBN 0-9524142-0-1.
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