patzer2: <25...Qb6>
Attempting to save the Knight meets with a withering attack on the helpless King:
If 25... f6, then White wins after
26. exf6 Bxf6 27. h4 Nf7 28. Qxe6+ Be7 29. Bg7
;
If 25... d4, then White wins after 26. Nd1 d3 27. cxd3 Rb6 28. f4 f5 29. exf6 Nf7 30. Bg7 Bxf6 31. Bxh8 Bxh8 32. Nf2 Kf8 33. Qe2
;
If 25... f5, then White wins after 26. exf6 Bxf6 27.h4 Nf7 28. Qxe6+ Qe7 29. Qc6+ Kd8 30. Rfd1 d4 31. Nd5 Qd6 32. Qxd6+ Nxd6 33. Nxf6
.
<26. Rae1>
Also winning is 26. Rfe1 d4 27. Nf1 d3+ 28. Kh1 d2 29. Red1 f5 30. exf6 Nf7 31. Bg7 Rg8 32. Qh4 h6 33. fxe7 Rxg7 34. Qf6 Rg8 35. Qxc3 Kxe7 36. Nxd2
.
<26... d4 27. Nd1 d3+ 28. Kh1 dxc2 29. Nf2 Bc5 30. Nd3 Be3 31. Bxg5 Bd2 32. Re2 O-O 33. Nc1 b4 34. Bxd2 cxd2 35. Rxd2 bxa3 36. Rxc2 Rfc8 37. Qe4 Rxc2 38. Qxc2 Qd4 39. Na2>
Also winning is 39. f4 Qb2 40. Rf2 Rd8 41. Kg1 g5 42. g3 Qxc2 43. Rxc2
.
<39... Qxe5 40. b4 Rd8 41. h3 h5 42. Rb1 Qe3 43. Rd1 Rd5>
Also losing for Black is 43... Rxd1+ 44. Qxd1 Qf2 45. Qa1 Qb2 46. Qxb2 axb2 47. Nc3 Kf8 48. Kg1 h4 49. Kf1 Ke7 50. Ke2 Kd7 51. Kd2
.
<44. Qb1 Qe2 45. Re1 Qd2 46. Rc1 Rd8 47. b5 Rb8 48. Rc3 h4 49. b6 Qd6
50. Rb3 Rb7 51. Nc3 Qc6 52. Rxa3 Qxb6>
No help for black is 52... Rxb6 53.
Qa1 Qd6 54. Ne4 Rb1+ 55. Qxb1 Qxa3 56. Qb8+ Kg7 57. Qe5+ Kg8 58. Qg5
.
<53. Qxb6 Rxb6 54. Ra4 g5 55. f4 Rb3 56. Ne2 Re3 57. Ng1> 1-0
Black resigns in the face of nothing but losing possibilities, such as 57...gxf4 58. Rxf4 e5 59. Rxh4 f6 60. Nf3 Kf7 61. Kg1 Ra3 62. Re4 1-0