Corner positions, once played, remain immune to flipping for the rest of the game (because there is no other opposite color behind them to create a flip); thus a player could use a piece in a corner of the board to anchor groups of pieces (starting with the adjacent edges) permanently. Therefore, capturing a corner often proves an effective strategy when the opportunity arises. More generally, a piece is stable when, along all four axes (horizontal, vertical, and each diagonal), it is on a boundary, in a filled row, or next to a stable piece of the same color. Grabbing a corner prematurely may be a mistake, however, if in doing so the player leaves "holes" along the edge. These holes can be filled by the opposing player and could result in capture of some or most of the pieces along that edge. This renders occupying the Corners largely useless.

See also Modifier

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