KEG: Post III
Oops. In my last post, "20. Nd2" was a typo and should have read "20. Na2." I did manage to get the diagram right, and it correctly shows a Knight at a2 rather than at d2. 21. Bb5?
To the extent White (with one of his Knights marooned on a2) still had any remaining advantage, that edge lay in his control of the c-file. Burn should therefore have played 21. Rc7. His actual move (21. Bb5?) was weak, but turned out to be the winning move since it led Marco to commit his fatal blunder on his 22nd turn. After 21. Bb5, the position was:
 click for larger view21... NxB?
I append a question mark to this move not only because it was bad intrinsically (as it was by removing the protection by the Knight of a Rook incursion by White on c8) but also because of the losing plan it contemplated that was revealed on Marco's next move. With 21...Nf6, Marco would suddenly have had the better chances. The text removes on of Black's minor piece defenders for c8. With his Bishop still on b7, Marco should have been able to survive even after the second-best text move. 22. QxN
 click for larger viewMarco's position--with his Bishop standing guard on b7--was still quite defensible. All he had to do was deal with the not so terrible threat of QxB. This "problem" could have easily been dealt with by 22...Ba6 (best) or 22...Nf8 (allowing the g7 Rook fo defend the b7 Bishop). But here Marco miscalculated and decided that he had a winning attack on the King-side, forgetting that with the b7 Bishop gone, c8 became a lethal inroad for Burn. As will be seen, Marco may have had a little trap in mind for Burn here. But this trap was one into which Burn was unlikely to fall. 22... g4??
"??"--(Tournament Book)
Talk about hanging a piece!
23. QxB
Game over!
23... gxN
This loses the Queen, but the alternatives (23...Rb8; 23...Nc5; 23...Rb8; 23...Ne5) were no prizes either. After 23...gxN, the position was:
 click for larger view24. Rc8!
As pointed out in the Tournament Book, 24. QxR?? [Burn's little trap] would lose after 24...Rxg2+ (i.e., 25. Kf1 QxQ 26. Rc8+ QxR 27. RxQ+ Kf7 leaving Black two pawns ahead in the ending). But Burn didn't fall for this, and now Marco was simply lost since Burn's Queen remained while Marco's was soon to be gone. 24... Rxg2+
25. Kh1 RxR
26. RxR QxR
27. QxR+ Nf8
 click for larger viewWhat followed was not of much interest. Burn's winning method was probably not the fastest or most pleasing, but it was sound and sure. Marco should probably have spared himself further trauma and just resigned. 28. Qc2 Ng6
29. Nc1 Kg7
30. Nd3 Rg5
31. Ne1 Nh4
32. Qd1
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