Chigorin Chess

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

Chigorin Chess, starting position

Chigorin Chess is a chess variant invented by Ralph Betza in 2002.^[1] It was named after Mikhail Ivanovich Chigorin.^[1] Betza commented that

Today he [Chigorin] is mostly remembered as a player who preferred Knights to Bishops. He didn't, really; instead, he had a more modern understanding of the relative values than his contemporaries, he realized that it all depends on the position, and that losing a tempo to get [Bishop] for [Knight] is usually a bad idea.

— Ralph Betza, Chigorin Chess, The Chess Variant Pages

Rules

The game follows all the rules and conventions of standard chess, with two differences:^[1]

1. White starts with all four minor pieces being knights, and a chancellor (which moves as rook or knight) instead of a queen, while Black starts with all four minor pieces being bishops and has a standard queen.^[1]
2. Pawns can only promote to any piece that their side had at the beginning of the game, except the king. Thus, white pawns may only promote to knight, rook, or chancellor, while black pawns may only promote to bishop, rook, or queen.^[1]

Gameplay

Chigorin Chess was meant to emphasize the contrast between the relative values of knights and bishops in standard chess. Betza commented that it was a good introductory variant for chessplayers, like his earlier Almost Chess.^[1]

Betza noted that White has a large advantage due to his fast development, being able to castle already on the third move, whereas Black can only castle at the fifth move at the earliest, and to castle this early he must move the f- or h-pawn to develop the g8-bishop and weaken his kingside.^[1]

References

1. Chigorin Chess at The Chess Variant Pages