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TETRIS GLOSSARY

Cancellation

Also called Cancel · Counter · Countering · Offsetting

Using generated attack to reduce pending incoming garbage before it enters your board. Any remaining attack may be sent onward. Exact timing and cancellation rules depend on the game.

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ATTACK ABSORBS INCOMING GARBAGE
6 incoming − 4 attack = 2 pendingHypothetical queueNo surplus attack remains

Here an attack offsets four pending lines. Exact cancellation timing depends on the game.