Battery
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Exercises built from YOUR games (solved, missed) are part of ChessPivot Plus. Discover ChessPivot Plus
The idea
A battery lines up two long-range pieces on one line: the front piece threatens, the one behind backs it up and multiplies the pressure. Doubled rooks on an open file, queen in front of the bishop aimed at the castled king — build the battery BEFORE striking: the threat then outgrows its execution.