Following that same diagonal, there should be an empty space, then one of your opponent's checkers(piece A), then another opponent checker (piece B) one row behind. Your second checker (piece 2) should be one row in front of your first checker on the diagonal. Your first checker (piece 1) should be in the leftmost or rightmost column, against the edge of the board. To use the 'Trapping Pairs' strategy, you need to wait for a certain setup on the board.
