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Sunday, December 21, 2014

Won King and Pawn Ending if Bishops can be forced off.

The following Bishop Ending is of practical and theoretical interest. It arose from a French Defense where Black captured White's e4 pawn on the third move of the game at the Internet Chess Club.

White has three pawn islands to Black's two. In a pure King and Pawn ending, the side with the fewer pawn islands frequently has the advantage. Such would be the case here if Black could figure out a way to force a trade of Bishops. Black would eventually win the game owing to his 4-3 King Side Pawn majority.

As you can see from the screenshot of the game, Black has just played Bc6 begging White, played by Taliesin of the the ICC, to exchange Bishops which would lead to previously mentioned losing end game for White.

Why is the ending losing for White? In short, because of the weakness of his isolated c5 pawn and a2 pawn. Black can convert is 4-3 majority to a single passed pawn which White must chase down which will lead to Black's a7 pawn queening.

Since this passed pawn is a rook pawn, Black has to prevent White getting to the stalemating c1 square.




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