those squares camouflage with the background and the walls
WoF - Chamber of Executioners

It seems your posting has not met the minimum requirements for submission, detailed in this thread. Please complete the following requirements:
- Which gamerules apply, including promotion rank and options.

Time control: ¼+4D
Testing games:
https://www.chess.com/4-player-chess?g=9864115-0
https://www.chess.com/4-player-chess?g=9864092-0
https://www.chess.com/4-player-chess?g=9860708-0
https://www.chess.com/4-player-chess?g=9864222-0
https://www.chess.com/4-player-chess?g=9864255-0
https://www.chess.com/4-player-chess?g=9864267-0
https://www.chess.com/4-player-chess?g=9864279-0
https://www.chess.com/4-player-chess?g=9864311-0
https://www.chess.com/4-player-chess?g=9864533-0
https://www.chess.com/4-player-chess?g=9883217-0
https://www.chess.com/4-player-chess?g=9883231-0
https://www.chess.com/4-player-chess?g=9883248-0
https://www.chess.com/4-player-chess?g=9883254-0
https://www.chess.com/4-player-chess?g=9883268-0