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Chess with different armies (or Betza chess^[1]) is a chess variant in which two sides use different sets of fairy pieces. There are several armies of equal strength to choose from, including standard FIDE army. In all armies kings and pawns are the same as in FIDE chess, but other pieces are different.

Contents 1 Rules 1.1 Colorbound Clobberers 1.2 Nutty Knights 1.3 Remarkable Rookies 2 Other armies 3 References

Before the game players choose their armies in a certain way, predefined by tournament rules. This can be done either randomly or secretly by both players. Each player has a choice of 4 armies^[2]: the Fabulous FIDEs, where all pieces move as in standard chess, Colorbound Clobberers, Nutty Knights or Remarkable Rookies army.

All armies are designed to be equal in strength, but have significantly different properties. kings and pawns move the same as in chess for all armies. Pawns can only promote to pieces available in either player's army at the start. The castling is done as in standard chess with exception of the case when rook replacement is a colorbound, like in colorbound clobberers army. In the latter case the king when castling long moves to b1 and rook replacement to c1. This makes sure that colorbound pieces doesn't change its square color.

Fers.

Alfil, can jump.

Wazir.

Dabbabah, can jump.

Many pieces in the following armies are combination of standard chess pieces and 4 fairy pieces: fers, alfil, wazir and dabbabah (see their movement diagrams above). The game can be played with standard chess pieces and the following move diagrams use standard pieces as well (except queens).

Cardinal. Moves as bishop or knight.

Bede. Moves as bishop or dabbabah. Can jump by orthogonal moves.

FAD. Moves as fers, alfil or dabbabah (hence the name.) Can jump for all moves.

Waffle. Moves as wazir or alfil. Can jump by diagonal moves.

Colonel. Moves as king or as rook forward and sideways or as knight forward.

Charging rook. Moves as king backwards or as rook forward and sideways.

Charging knight. Moves as king backward and sideways and as knight forward.

Fibnif. Moves as fers or as a knigh for its two longest forwards and backwards moves.

Chancellor. Moves as rook or knight.

Short rook. Moves as rook, but not more than 4 spaces.

Half duck. Moves as fers or dabbabah or jump 3 squares in orthogonal directions.

Woody rook. Moves as dabbabah or as wazir. Can jump for all moves.

The four armies described above were play tested by Ralph Betza and selected as most balanced ones. There are other armies, invented by Betza and other people:

• Cylindrical Ciders^[3] (Ralph Betza);
• Fighting Fizzies ^[4] (Peter Aronson);
• Forward FIDEs^[5] (Ralph Betza);
• Pizza Kings^[6] (John Lawson);
• Seeping Switchers^[7] (Jörg Knappen).

In initial version of the game there were 8 armies^[1] and in these armies the king moved differently then king in the standard chess. Instead of normal pawns, fairy pawns could be selected, for example berolina pawns. However, later Betza abandoned the idea of using fairy pieces for king and pawn^[8] and reduced the number of armies to four.