Losing chess
Antichess
Giveaway chess
Suicide chess
Killer chess

The warnings are in use to avoid situations where a competitor would stall a losing chess game and focus his activity only on boxing.

An alternative rule-set may also be specified (such as circe chess or losing chess), or a fairy piece may be substituted for an orthodox piece.

Losing chess (Suicide chess) has been a popular chess variant on most chess servers that have offered it ever since the early days of the ICS.

Antichess (or Losing chess, Losing Game, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess): capturing moves are mandatory and the object is to lose all one's pieces.

Antichess (also known as Losing chess, Losing Game, Zero chess, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess, or Shmess) is a chess variant in which the objective of each player is to lose all of his pieces.

Besides standard FIDE chess, Zillions of Games contains many national chess variants such as shogi, xiangqi, janggi, as well as a number of popular chess variants like Ultima, Extinction chess, Losing Chess, shatranj, Berolina chess, Grand chess and others.

Take Me chess is also a form of antichess.

Because of the popularity of Antichess, several variations have spawned.

Kamikaze chess: a variant of Antichess.

Take, for example, Giveaway Chess, in which captures are mandatory and the object is to lose all your pieces.

Sjeng is able to make use of multiple computer processors and is able to play some chess variants, such as Chess960, crazyhouse and giveaway chess.

Antichess (or Losing chess, Losing Game, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess): capturing moves are mandatory and the object is to lose all one's pieces.

Antichess (also known as Losing chess, Losing Game, Zero chess, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess, or Shmess) is a chess variant in which the objective of each player is to lose all of his pieces.

Promotions to king are allowed in some chess variants, such as suicide chess.

Annie remembers a chess game known as "Suicide Chess" where if you win you lose.

Chicken Chess: a combination of Benedict Chess and Suicide Chess.

Gardner minichess was also played by AISE with suicide chess and progressive chess rules.

Chess - a chess game featuring a high-quality graphical display and support for chess variants such as crazyhouse and suicide chess.

Losing chess (Suicide chess) has been a popular chess variant on most chess servers that have offered it ever since the early days of the ICS.

XBoard has always been supportive of Chess variants, such as Suicide Chess or Crazyhouse, acting as a client for Internet Chess Servers that offered such variants.

There are two major variants played online, Losers Chess (aka w17) played on ICC, which actually created the variant because they were unable to implement the free ICSs' Suicide chess rules.

Antichess (or Losing chess, Losing Game, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess): capturing moves are mandatory and the object is to lose all one's pieces.

Antichess (also known as Losing chess, Losing Game, Zero chess, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess, or Shmess) is a chess variant in which the objective of each player is to lose all of his pieces.

Killer Chess Tactics, Raymond Keene, Leonid Shamkovich & Eric Schiller, Cardoza, 2003.

Antichess (or Losing chess, Losing Game, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess): capturing moves are mandatory and the object is to lose all one's pieces.

Antichess (also known as Losing chess, Losing Game, Zero chess, Giveaway chess, Suicide chess, Killer chess, Take-all chess, Reverse chess, or Shmess) is a chess variant in which the objective of each player is to lose all of his pieces.