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In the position from the game Krasenkow versus Zvjaginsev, [4] a thicket of black pawns hems in Black's bishop on c8, so Black is effectively playing with one piece fewer than White. Although the black pawns also obstruct the white bishop on e2, it has many more attacking possibilities, and thus is a good bishop vis-à-vis Black's bad bishop.
The defending bishop must maintain an attack on the pawn on the same color square as itself, so that the attacking king is not allowed to advance. If White pushes the other (unattacked) pawn, Black's bishop sacrifices itself for both pawns, with a draw. (If the second pawn is protected and advances instead, the position is also a draw.)
In a chess endgame, a wrong bishop is a bishop that would have been better placed on the opposite square color. [1] This most commonly occurs with a bishop and one of its rook pawns, but it also occurs with a rook versus a bishop, a rook and one rook pawn versus a bishop, and possibly with a rook and one bishop pawn versus a bishop.
In a chess endgame of a king, bishop, and pawn versus a bare king, or, less commonly, a king, rook, and pawn versus a bishop and king, a wrong rook pawn is a rook pawn (a pawn on the a- or h-file) whose promotion square is the opposite color from the bishop's square color.
Black is better, but Black's bishop cannot dislodge the white knight from its centralized outpost. Opposite-colored bishops sometimes give the defender drawing chances in the long run, even if the opponent has a material advantage of one or two pawns or even the exchange .
The Exchange Variation of the Ruy Lopez is a chess opening that begins with the moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6. Black may recapture on c6 with either pawn; although 4...bxc6 is playable, 4...dxc6 is almost always chosen at master level. Black has gained the bishop pair at the cost of a weakened pawn structure, having doubled pawns ...
Black's intention is to play ...exd5 and create a queenside pawn majority, whose advance will be supported by a fianchettoed bishop on g7. The combination of these two features differentiates Black's setup from the other Benoni defenses and the King's Indian Defense , although transpositions between these openings are common.
has two pieces controlling the weak d5-square in front of the IQP (queen's knight and light-squared bishop). has three pieces preparing the thematic d4–d5 advance (queen's knight, light-squared bishop, and queen). has pinned the f6-knight against the black queen with the dark-squared bishop on g5 reducing Black's control of the crucial d5-square.