four-player chess
four-handed
four-way chess

The first game published by the company was Bosworth, a four-player chess variant which has since been retired.

Fortress chess (or Russian Four-Handed chess) is a four-player chess variant played in Russia in 18th and 19th centuries.

Enochian chess is a four-player chess variant, similar to Chaturaji, associated with the Hermetic Order of the Golden Dawn.

Chris Zalewski: Enochian Chess of the Golden Dawn: A Four-Handed Chess Game.

CHAPTER TWENTY STEN FOUR-HANDED BEERMUos and pushed away from the vendor.

THREE AND FOUR-HANDED CASSINO Three-handed Cassino is in all essential particulars identical with the Twenty-one Point game.

Four-handed chess (also known as Four-player, Four-man, or Four-way chess) is a chess variant, which is typically played with four people.

Four-handed chess (or Four-player, Four-man, Four-way chess): can be played by four people and uses a special board and four sets of differently coloured pieces.