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Defense Perimeter






In Chess , the defense perimeter is a drawing technique in which the side lagging in material or otherwise at a disadvantage sets up a perimeter, largely composed of a pawn chain, that the opponent cannot penetrate. It is related to another drawing strategy, the Fortress . Unlike the fortress, a defense perimeter can often be set up in the middlegame with several pieces remaining on the board.

In the diagram on the right, from Andrew Soltis 's ''The Art of Defense in Chess'', Black played 1...Qb6!? in response to the threatned break b5-b6. White could still have won by bringing his King to a4 and Knight to b3, winning the a5 pawn. But he took the bait with 2. Nxb6? and the game was drawn after 2...cxb6 3. h4 gxh4 4. Qd2 h3! 5. gxh3 h4.


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