Endgame Novelty

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AdminX
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Endgame Novelty

Post by AdminX » Mon Sep 30, 2019 10:33 am



27. a4

Played by Radjabov vs Ding in Game 1 of the final in the FIDE World Cup 2019.
"Good decisions come from experience, and experience comes from bad decisions."
__________________________________________________________________
Ted Summers

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Re: Endgame Novelty

Post by AdminX » Mon Sep 30, 2019 10:43 am

And the game ended in a quick draw.

"Good decisions come from experience, and experience comes from bad decisions."
__________________________________________________________________
Ted Summers

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Re: Endgame Novelty

Post by bob » Mon Sep 30, 2019 7:22 pm

I ran this with Crafty on my MacBook. It evaluates 27. a4 as an instant draw. If I let it think on its own, it chooses 27. f3 with a comfortable advantage for white...

Code: Select all

         22     1.99          0.17   27. Rc1 Kf8 28. c4 Ne7 29. Kf3 Rd4
                                     30. cxb5 axb5 31. Rd1 Nf5 32. Rxd4 Nxd4+
                                     33. Ke4 Nxb3 34. axb3 Ke7 35. Ke5 g5
                                     36. b4 h6 37. f3 Kd7 38. Kf6
         22     4.57          0.53   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kf7 32. a4 h5
                                     33. Bxd5+ cxd5 34. h4 gxh4+ 35. Kxh4 Kg6
                                     36. a5 Rb4+ 37. Kh3 Rb3 38. Kg3 h4+
                                     39. Kf4
         22->   4.57          0.53   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kf7 32. a4 h5
                                     33. Bxd5+ cxd5 34. h4 gxh4+ 35. Kxh4 Kg6
                                     36. a5 Rb4+ 37. Kh3 Rb3 38. Kg3 h4+
                                     39. Kf4 (s=2)
         23     4.64          0.46   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kg7 32. Bxd5 cxd5
                                     33. a4 Rb6 34. Rd1 Rd6 35. f4 Kf6 36. Rd4
                                     Ra6 37. Kf3 gxf4 38. Kxf4 (s=2)
         23->   4.67          0.46   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kg7 32. Bxd5 cxd5
                                     33. a4 Rb6 34. Rd1 Rd6 35. f4 Kf6 36. Rd4
                                     Ra6 37. Kf3 gxf4 38. Kxf4 (s=2)
         24     4.80          0.51   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kg7 32. Bxd5 cxd5
                                     33. a4 Rb6 34. Rd1 Rd6 35. f4 Kf6 36. Rd4
                                     Ra6 37. Kf3 h6 38. fxg5+ hxg5 39. Rb4
                                     (s=2)
         24->   4.88          0.51   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kg7 32. Bxd5 cxd5
                                     33. a4 Rb6 34. Rd1 Rd6 35. f4 Kf6 36. Rd4
                                     Ra6 37. Kf3 h6 38. fxg5+ hxg5 39. Rb4
                                     (s=2)
         25     5.14          0.51   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kg7 32. Bxd5 cxd5
                                     33. a4 Rb6 34. a5 Ra6 35. f4 Kf6 36. Kf3
                                     h6 37. Ke3 gxf4+ 38. Kxf4 h5 39. Ra3 Re6
                                     (s=2)
         25->   5.19          0.51   27. f3 Re2 28. c4 bxc4 29. Bxc4 Rxb2
                                     30. Bxa6 g5 31. Bc4 Kg7 32. Bxd5 cxd5
                                     33. a4 Rb6 34. a5 Ra6 35. f4 Kf6 36. Kf3
                                     h6 37. Ke3 gxf4+ 38. Kxf4 h5 39. Ra3 Re6
         26     6.71          0.52   27. f3 Re6 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Rg6+ 31. Kf2 Rh6 32. Bb3 Kf8 33. Rc5 Rxh3
                                     34. Rxc6 Rh5 35. Rc5 Nf6 36. Rc8+ Ke7
                                     37. Rc7+ Nd7 38. Ba4 Rd5 39. Ra7 h5
                                     40. Bc6 Rd1 41. Bxd7 Rxd7 42. Rxa5
         26->   6.79          0.52   27. f3 Re6 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Rg6+ 31. Kf2 Rh6 32. Bb3 Kf8 33. Rc5 Rxh3
                                     34. Rxc6 Rh5 35. Rc5 Nf6 36. Rc8+ Ke7
                                     37. Rc7+ Nd7 38. Ba4 Rd5 39. Ra7 h5
                                     40. Bc6 Rd1 41. Bxd7 Rxd7 42. Rxa5
         27     7.23          0.52   27. f3 Re6 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Rg6+ 31. Kf2 Rh6 32. Bb3 Kf8 33. Rc5 Rxh3
                                     34. Rxc6 Rh5 35. Rc5 Nf6 36. Rc8+ Ke7
                                     37. Rc7+ Nd7 38. Ba4 Rd5 39. Ra7 h5
                                     40. Bc6 Rd1 41. Bxd7 Rxd7 42. Rxa5
         27->   7.32          0.52   27. f3 Re6 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Rg6+ 31. Kf2 Rh6 32. Bb3 Kf8 33. Rc5 Rxh3
                                     34. Rxc6 Rh5 35. Rc5 Nf6 36. Rc8+ Ke7
                                     37. Rc7+ Nd7 38. Ba4 Rd5 39. Ra7 h5
                                     40. Bc6 Rd1 41. Bxd7 Rxd7 42. Rxa5
         28    13.06          0.40   27. f3 Re6 28. a4 Rg6+ 29. Kf2 Rd6
                                     30. axb5 axb5 31. Ra6 Kf8 32. Bxd5 Rxd5
                                     33. Rxc6 Rd2+ 34. Ke3 Rxb2 35. Rc7 Rc2
                                     36. Rc5 Kf7 37. Kd4 Rb2 38. Ke5 h6 39. Kd5
                                     Rb1 40. Kc6 Rb3 41. Kd6 Kf6
         28->  13.54          0.40   27. f3 Re6 28. a4 Rg6+ 29. Kf2 Rd6
                                     30. axb5 axb5 31. Ra6 Kf8 32. Bxd5 Rxd5
                                     33. Rxc6 Rd2+ 34. Ke3 Rxb2 35. Rc7 Rc2
                                     36. Rc5 Kf7 37. Kd4 Rb2 38. Ke5 h6 39. Kd5
                                     Rb1 40. Kc6 Rb3 41. Kd6 Kf6
         29    31.70          0.59   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Ne7 38. Rd6 Rxa3 39. Bd3 Kf7
                                     40. Kd4 g6 41. Bc4+ Kg7 42. Ke4 Nf5
         29->  32.16          0.59   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Ne7 38. Rd6 Rxa3 39. Bd3 Kf7
                                     40. Kd4 g6 41. Bc4+ Kg7 42. Ke4 Nf5
         30    35.40          0.55   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Ne7 38. Rc4 Rxa3 39. Be4 Kf7
                                     40. Kd6 Kf6 41. Rc7 Nf5+ 42. Bxf5 Kxf5
                                     43. Rf7+ Kg6
         30->  36.11          0.55   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Ne7 38. Rc4 Rxa3 39. Be4 Kf7
                                     40. Kd6 Kf6 41. Rc7 Nf5+ 42. Bxf5 Kxf5
                                     43. Rf7+ Kg6
         31    40.99          0.59   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Ne7 38. Rd6 Rxa3 39. Be4 Kf7
                                     40. Rd7 Ra1 41. Ra7 a4 42. Bd5+ Ke8
                                     43. Ke6 Re1+ 44. Be4
         31->  41.53          0.59   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Ne7 38. Rd6 Rxa3 39. Be4 Kf7
                                     40. Rd7 Ra1 41. Ra7 a4 42. Bd5+ Ke8
                                     43. Ke6 Re1+ 44. Be4
         32    47.77          0.55   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Nf6 38. Rc8+ Ke7 39. Be4 Rxa3
                                     40. Rc7+ Nd7+ 41. Kf4 Kd6 42. Rc6+ Ke7
                                     43. Kf5 a4 44. Rg6 Kf7 45. Bd5+ Kf8
                                     46. Ke6 Nc5+ 47. Kd6
         32->  48.68          0.55   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kf4 Rg2
                                     34. a3 Nd5+ 35. Ke5 Rxb2 36. Bxh7 Rb3
                                     37. Rxc6 Nf6 38. Rc8+ Ke7 39. Be4 Rxa3
                                     40. Rc7+ Nd7+ 41. Kf4 Kd6 42. Rc6+ Ke7
                                     43. Kf5 a4 44. Rg6 Kf7 45. Bd5+ Kf8
                                     46. Ke6 Nc5+ 47. Kd6
         33     1:03          0.60   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kh2 h6
                                     34. a3 Nd5 35. h4 Rh5 36. Kg3 Ne7 37. Be4
                                     Rb5 38. Rc2 Kf7 39. Bxc6 Nxc6 40. Rxc6
                                     Rxb2 41. Rc5 a4 42. Ra5 Rd2 43. Rxa4 Kf6
         33->   1:04          0.60   27. f3 Re5 28. c4 bxc4 29. Bxc4 a5 30. Rc1
                                     Kf8 31. Bd3 Nb4 32. Bb1 Rg5+ 33. Kh2 h6
                                     34. a3 Nd5 35. h4 Rh5 36. Kg3 Ne7 37. Be4
                                     Rb5 38. Rc2 Kf7 39. Bxc6 Nxc6 40. Rxc6
                                     Rxb2 41. Rc5 a4 42. Ra5 Rd2 43. Rxa4 Kf6
as opposed to this (after 27. a4 was played:

Code: Select all

         23     1.04          0.00   27. ... Re2 28. axb5 axb5 29. Ra2 Rd2
                                     30. Bxd5+ cxd5 31. f3 Kf7 32. Kf4 d4
                                     33. Ra7+ Kf6 34. Rb7 dxc3 35. bxc3 Rd5
                                     36. Ke4 Rh5 37. Rb6+ Ke7 38. Rb8 Kf7
                                     39. Kf4 Rd5 40. Rb7+ Kf6 <3-fold>
         23->   1.14          0.00   27. ... Re2 28. axb5 axb5 29. Ra2 Rd2
                                     30. Bxd5+ cxd5 31. f3 Kf7 32. Kf4 d4
                                     33. Ra7+ Kf6 34. Rb7 dxc3 35. bxc3 Rd5
                                     36. Ke4 Rh5 37. Rb6+ Ke7 38. Rb8 Kf7
                                     39. Kf4 Rd5 40. Rb7+ Kf6 <3-fold>
         24     1.33          0.00   27. ... Re2 28. axb5 axb5 29. Ra2 Rd2
                                     30. Bxd5+ cxd5 31. f3 Kf7 32. Kf4 d4
                                     33. Ra7+ Kf6 34. Rb7 dxc3 35. bxc3 Rd5
                                     36. Ke4 Rh5 37. Rb6+ Ke7 38. Rb8 Kf7
                                     39. Kf4 Rd5 40. Rb7+ Kf6 <3-fold>
         24->   1.37          0.00   27. ... Re2 28. axb5 axb5 29. Ra2 Rd2
                                     30. Bxd5+ cxd5 31. f3 Kf7 32. Kf4 d4
                                     33. Ra7+ Kf6 34. Rb7 dxc3 35. bxc3 Rd5
                                     36. Ke4 Rh5 37. Rb6+ Ke7 38. Rb8 Kf7
                                     39. Kf4 Rd5 40. Rb7+ Kf6 <3-fold>
         25     2.37          0.04   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 g5 35. Rxh7 d4
                                     36. Rh6+ Kd5 37. Rg6 d3 38. Rxg5+ Kd4
                                     39. Rg4+ Kd5 40. Rg8 Kc4 41. Rd8 Kxb4
         25->   2.53          0.04   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 g5 35. Rxh7 d4
                                     36. Rh6+ Kd5 37. Rg6 d3 38. Rxg5+ Kd4
                                     39. Rg4+ Kd5 40. Rg8 Kc4 41. Rd8 Kxb4
         26     3.06          0.01   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 g5 35. Rxh7 Rb3
                                     36. Rh6+ Kf5 37. Rd6 Ke5 38. Rb6 d4
                                     39. Rb5+ Kf6 40. Kg4 Ke6 41. Rxg5 Rxb4
         26->   3.19          0.01   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 g5 35. Rxh7 Rb3
                                     36. Rh6+ Kf5 37. Rd6 Ke5 38. Rb6 d4
                                     39. Rb5+ Kf6 40. Kg4 Ke6 41. Rxg5 Rxb4
         27     3.67          0.03   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 g5 35. Rxh7 Rb3
                                     36. Rh6+ Kf5 37. Rd6 Ke5 38. Rb6 d4
                                     39. Rb5+ Kf6 40. Rb7 Ke6 41. Kg4 Kd5
                                     42. Rd7+ Kc4
         27->   3.85          0.03   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 g5 35. Rxh7 Rb3
                                     36. Rh6+ Kf5 37. Rd6 Ke5 38. Rb6 d4
                                     39. Rb5+ Kf6 40. Rb7 Ke6 41. Kg4 Kd5
                                     42. Rd7+ Kc4
         28     5.01          0.09   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5 36. b6
                                     Rg1+ 37. Kf2 Rb1 38. Rb8 Kd6 39. Ke3 Rb3+
                                     40. Kf4 Kc6 41. Rc8+ Kd6 42. Rc7 Rxb6
                                     43. Rxg7
         28->   5.37          0.09   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5 36. b6
                                     Rg1+ 37. Kf2 Rb1 38. Rb8 Kd6 39. Ke3 Rb3+
                                     40. Kf4 Kc6 41. Rc8+ Kd6 42. Rc7 Rxb6
                                     43. Rxg7
         29     8.24          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         29->   8.48          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         30    10.13          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         30->  10.47          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         31    12.67          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         31->  13.01          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         32    15.39          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         32->  16.00          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         33    20.09          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         33->  20.74          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Ke6 34. Rb7 Rc1 35. b5 Ke5
                                     36. Kf2 Rc2+ 37. Kg3 Rc1 <3-fold>
         34    29.18          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Rb3 34. Rxd5 Rxb4 35. Rd7+ Kf6
                                     36. h4 h6 37. Rc7 Rd4 38. f4 Rd3+ 39. Kg4
                                     Rd6 40. Kf3 g6 41. Ke4 Re6+ 42. Kf3 Re1
                                     43. Rc6+ Kf5 44. Rc5+ Kf6 45. Rc6+
                                     <3-fold>
         34->  30.22          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Rb3 34. Rxd5 Rxb4 35. Rd7+ Kf6
                                     36. h4 h6 37. Rc7 Rd4 38. f4 Rd3+ 39. Kg4
                                     Rd6 40. Kf3 g6 41. Ke4 Re6+ 42. Kf3 Re1
                                     43. Rc6+ Kf5 44. Rc5+ Kf6 45. Rc6+
                                     <3-fold>
         35    44.08          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Rb3 34. Rxd5 Rxb4 35. Rd7+ Kf6
                                     36. h4 h6 37. Rc7 Rd4 38. f4 Rd3+ 39. Kg4
                                     Rd6 40. Kf3 g6 41. Ke4 Re6+ 42. Kf3 Re1
                                     43. Rc6+ Kf5 44. Rc5+ Kf6 45. Rc6+
                                     <3-fold>
         35->  45.77          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Rb3 34. Rxd5 Rxb4 35. Rd7+ Kf6
                                     36. h4 h6 37. Rc7 Rd4 38. f4 Rd3+ 39. Kg4
                                     Rd6 40. Kf3 g6 41. Ke4 Re6+ 42. Kf3 Re1
                                     43. Rc6+ Kf5 44. Rc5+ Kf6 45. Rc6+
                                     <3-fold>
         36     1:04          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Rb3 34. Rxd5 Rxb4 35. Rd7+ Kf6
                                     36. h4 h6 37. Rc7 Rd4 38. f4 Rd3+ 39. Kg4
                                     Rd6 40. Kf3 g6 41. Ke4 Re6+ 42. Kf3 Re1
                                     43. Rc6+ Kf5 44. Rc5+ Kf6 45. Rc6+
                                     <3-fold>
         36->   1:06          0.00   27. ... Re2 28. Bxd5+ cxd5 29. b4 Rc2
                                     30. f3 Rxc3 31. axb5 axb5 32. Ra5 Kf7
                                     33. Rxb5 Rb3 34. Rxd5 Rxb4 35. Rd7+ Kf6
                                     36. h4 h6 37. Rc7 Rd4 38. f4 Rd3+ 39. Kg4
                                     Rd6 40. Kf3 g6 41. Ke4 Re6+ 42. Kf3 Re1
                                     43. Rc6+ Kf5 44. Rc5+ Kf6 45. Rc6+
                                     <3-fold>
I suppose the question is, is 27. a4 considered the best move, or a legal move?

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Re: Endgame Novelty

Post by AdminX » Mon Sep 30, 2019 8:03 pm

While I was watching the commentary on the game this morning, it was stated that they (Radjabov and Ding) had played this line before in the pass. I don't think they claimed it to be a great move, just that it was new and had not been played before in the past. I will take a look at the f3 line.
"Good decisions come from experience, and experience comes from bad decisions."
__________________________________________________________________
Ted Summers

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