Position 15 is the game Langer Chwieseni (7.39). – White has some problems with his isolated pawn at c3. Black should develop his worst piece at the moment. With 16…Rfd8 (option C) black fights back at the d file. In the game black thought that white has a problem with his first rank: 16…Bxb4 (option B) 17.cxb4 Now white has solved his problem with the pawns at the queen side. 17…Nxb4 Black thinks winning a pawn because of the weakness of the first rank 18.Qxb4 Qc1+ Is it mate? 19.Rd1 No! White keeps his extra piece and won the game. Option A, 16…Nxb4 is generally not a good move. The knight at a6 is placed on a good square where it controls c5. Trading it at b4 only solves white problems.
Position 15 is the game Langer – Chwieseni (7.39). White has some problems with his isolated pawn at c3. Black should develop his worst piece at the moment. With 16…Rfd8 (option C) black fights back at the d file. In the game black thought that white has a problem with his first rank: 16…Bxb4 (option B) 17.cxb4 Now white has solved his problem with the pawns at the queen side. 17…Nxb4 Black thinks winning a pawn because of the weakness of the first rank 18.Qxb4 Qc1+ Is it mate? 19.Rd1 No! White keeps his extra piece and won the game. Option A, 16…Nxb4 is generally not a good move. The knight at a6 is placed on a good square where it controls c5. Trading it at b4 only solves white problems.
NATO%20Chess%202013%20Round%207%20Highlights.docx