what are king of the hill and 3 check

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Cwsinclair
TELL ME PLEASE!
Cheetah88888888

those are variants of chess. you can go to them by going to Play > 4 Player & Variants
explanations:
king of the hill is a chess variant where you try to get ur king to the middle before the opponent i think and 3 check is one that you win by giving 3 checks