11. Many conservative players at chess tournaments may be "bugged," when typically, younger players, play this game, between rounds, at chess tournaments.
From Quiz Chess Variants
Answer:
Bughouse
Bughouse, also known as Siamese Chess or Double Bughouse, is a game played with four players on two teams. Players on each team have opposite colors, and may give any captured pieces to their partner. The game can get boisterous and noisy, when partners are clamoring for certain pieces, or telling their partner not to give up particular pieces. White usually attacks, while the player with Black tries to supply their partner with the necessary pieces.