File:4 Players Individual Circular Chess variant in 6 Players Circular Chess invented by Hridayeshwar Singh Bhati.JPG - Wikimedia Commons

3D Printable Hexchess 2 - 4-Player Chess Board - Borders and Tiles by Dalla Croce Studios

Cliff Pickover on X: Fortress chess is a 4-player chess variant

4 Player Chess Set Combination - Single Weighted Regulation Colored Chess Pieces & 4 Player Vinyl Chess Board

4 player chess rules teams - Chess Forums

4 player chess Wiki

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Large 4 Player Chess Set

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Three or Four Players Chess Set：A Leather Game Mat + 4 Packs of Pieces (64 Pieces) + 1 Game Manual + A Drawstring Storage Bag. A Strategy Chess Game for 2-4 Players : Toys & Games