FACTOID #53: If you thought Antarctica was inhospitable, think again - its land area is only ninety-eight percent ice. Reassuringly, the other 2% is categorised as "barren rock".
Andernach chess is a chess variant in which a piece making a capture (except kings) changes colour. For instance, if a white bishop on a2 were to capture a black knight on g8, the end result would be a black bishop on g8. Non-capturing moves are played as in orthodox chess. A chess variant is any game derived from, related to or similar to chess in at least one respect. ...
The variation grew out of Tibetan chess, in which a black unit changes colour when it captures a white piece of a different type. It is 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 tourney 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. Andernach is a town in Rheinland-Pfalz, Germany on the left bank of the Rhine river, just north of Koblenz. ... A chess variant is any game derived from or related to chess. ... Excelsior by Sam Loyd. ...
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.
For example, the knight in orthodox chess is a (2,1) leaper, meaning it moves two squares in one direction (horizontally or vertically) and one square in the other (note that it could also be described as a (1,2) leaper - there is no significance to the order of the numbers).
In shatranj, a forerunner to chess, the pieces which were later replaced by the bishop and queen were also leapers: the alfil was a (2,2) leaper (moving exactly two squares diagonally in any direction), and the fers a (1,1) leaper (that is, it can move one square diagonally in any direction).
There are three riders in orthodox chess: the rook can move an unlimited number of (1,0) cells and is therefore a (1,0) rider; the bishop is a (1,1) rider; and the queen is a (1,1) or (1,0) rider.
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