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S-House S-House

S-House is a custom variant combining the rules of S chess (AKA Seirawan or SHARPER chess) with the drop rules of Crazyhouse. The same rules apply to both games. As this is considered a derivative of S chess, please check the rules in its separate guide. Crazyhouse rules are as below for a reminder.

Crazyhouse Rules

Drops can be performed with captured pieces, which would be done in lieu of moving a piece on the board. Drops are annotated with @. So for example,R@e4 means rook drop at e4. The rules for dropping pieces are as follows:


The elephant and archbishop are also counted as pieces in hand, so they are able to be dropped on the board starting from the beginning.