Tempo Chess is a fast, tactical chess puzzle game built around two main rules:
Every move you play must give check.
Captured pieces can be "dropped" onto the board to deliver check/checkmate.
Each puzzle starts from a pre-set position. Your job is to find a forced checkmate, delivering check after check while the opponent defends.
What makes it different
Checks-only puzzles: every move you make must be check (or checkmate).
Crazyhouse/bughouse-inspired drops: captured pieces can be dropped back onto the board to create new checking ideas and tactical finishes.
Keep the tempo by checking and ending in checkmate.
Checkmate puzzles where every move must give check.