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12... b6
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Black is still working for an attack, but positionally is standing badly with an unprotected queen and lack of piece development. The idea is to follow with Bb8-b7 to apply pressure down the long diagonal. |
 
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13. Nb5
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White attacks the queen with the idea of Ra1-c1 to support the move Nb5-c7+ and a winning fork. Rate as ! for the concept. |
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13... Qd7
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Black sees the move Nc7+, but does not see the assisting move of Ra1-c1. |
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14. Rc1 O-O
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Black obtains king safety at the expense of the rook. There is no better move. |
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15. Nc7
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Rate as ! for the continuation of the idea started at move 13. |
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15... Bb7 16. Nxa8
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White transitions from +1 to +3 points securing a material edge. Rate as +\- because of the material advantage combined with a positional advantage gained by better piece placement. |
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16... Bxa8 17. Qc2
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White begins to setup an attack on the king by targeting h7. The knight at f6 will have to be eliminated to free the protection of h7. |
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17... d4
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This move does not accomplish anything and is easily refuted. Black may have been thinking Be3xd4, Ba8xf3, g2xf3, Qd7xd4 winning a bishop - not a very good or likely line. |
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18. Nxd4 Bxg2
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Black overestimates the success of this move hoping Kg1xg2, Qd7-d5+, Kg2-g1, and continued manouvers using the queen and knight in an attempt at mate. |
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19. Kxg2
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White now stands very much better materially and even with the risky appearance of the king on g2 is fine positionally. Rate +\- with +6 points. |
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19... Qd5+ 20. f3
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The refutation. |
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20... Ng4
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Black aims for Ng4xe3 with a grand fork of K, Q, R. The pin prevents the capture of the knight. Not a bad try but for the bishop can escape while maintaining control of the e3 square. |
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21. Bg1 Nd7
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Black moves another piece into the fray, but unfortunately it is a knight travelling from the opposite side of the board and will not gain ground quickly enough. |
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22. Be4
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There is no move that will afford black an advantage. Black resigns. If Qd5-g5 in hopes of a revealed attack by moving the knight, then f3xg4, Qg5xg4+, Kg2-h1 and the attack is over. Win 1-0. |
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