En passant tactic
These puzzles use the en passant capture. A pawn that has just moved two squares can be captured by an enemy pawn as if it had moved one square, and only on the next move.
En passant can open a file, remove a defender, or deliver a discovered check. The rules page shows the capture on a board.
Source database: 8,655 puzzles with this tag. This trainer: 151.
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Find the move.
By rating band
These band pages are not indexed. They keep the same theme and fix the rating range.