topic:
do you think this is perhaps the start of new generation of stockfish?
can we call this (Oct 15 and beyond) "the next-gen stockfish"
that leaps forward with a big stride?
***
I think SF Oct 15 has started an epoch
and SF Oct 15 is quite different from the previous SF versions
in a rudimentary way
after watching over hundreds of matches for SF's latest versions
I have made an observation that SF Oct 15
did something I have never seen before from SF engines
Oct 15 is perhaps only slightly better than the previous versions
in terms of elo rating
but Oct 15 did something no previous versions did (perhaps
the previous versions did this, perhaps I just never saw them doing it)
that engine version (Oct 15) overcame one of the biggest obstacles
and weak points SF had I guess
***
I heard many ppl saying something like
when SF is having a match with other engines with same or similar elo
SF was leading by more than +2.0 or so
from both SF's eval and opponent's eval
(not just from SF's eval, but also from opponent's engine output eval)
but all of a sudden, SF just lost quickly
it looks like SF is weak at the ending phase
or at the pivotal moment
and also, when SF is losing by
more than -1.5 points
SF can never recover from the trailing
and SF can never win
and after trailing behind opponent with -1.5 or more points
SF can only lose and draw
and never win
***
SF Oct 15 was having matches with houdini 3 pro
SF was black so it's not easy for black side
and SF was losing
by houdini's eval, -4.0 or so
by SF's eval, -5.0 or so
then guess what happens
SF won the match
I think I never saw this kind of reversal
this kind of reversion is hard to come by from SF
but it seems like SF overcame one of the biggest weaknesses SF had
if SF can win over after trailing behind by -5.0
ppl can expect a lot more from later SF versions
which has the potential to be revolutionary!
[pgn][Event "Computer Chess Game"]
[Site "USER01"]
[Date "2013.10.16"]
[Round "95"]
[White "Houdini 3 Pro w32"]
[Black "Stockfish 151013"]
[Result "0-1"]
[TimeControl "60/60"]
[Annotator "17. +0.22 17... +0.00"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8.
Be3 Be7 9. O-O O-O 10. Qd2 Nbd7 11. a4 Rc8 12. a5 Ng4 13. Bxg4 Bxg4 14. Nc1
Be6 15. f3 Qe8 16. N1e2 Qd8 17. Ng3 {+0.22/16 2.8} Nf6 {+0.00/19 1.7} 18.
Rfd1 {+0.20/16 4} Qc7 {+0.24/18 1.3} 19. Bb6 {+0.20/17 1.8} Qd7
{+0.22/21 1.3} 20. Nf1 {+0.15/16 1.1} Rfe8 {+0.28/20 1.0} 21. Ne3
{+0.32/16 1.2} Qc6 {+0.28/21 1.1} 22. Qf2 {+0.30/16 7} Kh8 {+0.28/19 1.7}
23. Rd3 {+0.39/15 0.9} Kg8 {+0.28/20 4} 24. Rad1 {+0.55/14 1.0} Qd7
{+0.50/19 7} 25. b3 {+0.75/17 1.1} Rf8 {+0.72/18 1.4} 26. Na4
{+0.84/16 2.1} Nh5 {+0.78/18 1.6} 27. R3d2 {+0.72/16 2.4} Qc6
{+0.68/18 1.5} 28. c4 {+0.95/15 1.4} Nf6 {+0.80/19 1.4} 29. Nc3
{+0.97/17 2.1} Qe8 {+0.84/18 1.8} 30. Rd3 {+1.02/15 1.1} Rc6 {+0.72/18 1.5}
31. Na2 {+1.00/16 0.9} Qb8 {+0.92/19 1.0} 32. Nb4 {+1.01/15 1.5} Rcc8
{+0.86/21 1.2} 33. Qe2 {+0.93/14 1.3} Rfe8 {+0.86/19 3} 34. g3
{+0.89/15 0.8} Nd7 {+0.68/18 1.3} 35. Nbd5 {+0.78/16 2.0} Nxb6
{+0.70/18 1.3} 36. Nxb6 {+0.86/17 6} Rc5 {+0.80/17 1.5} 37. Qd2
{+0.92/15 0.7} Rc6 {+0.78/16 1.1} 38. Nf5 {+0.83/15 1.5} Bxf5
{+0.70/15 0.7} 39. exf5 {+0.83/14} h6 {+0.96/16 1.0} 40. Rd5 {+0.98/15 0.6}
h5 {+0.76/16 2.3} 41. Kg2 {+0.97/15 0.6} h4 {+0.84/16 0.9} 42. g4
{+0.92/15 0.7} Qd8 {+0.70/17 0.8} 43. h3 {+0.69/14 0.6} Bg5 {+0.70/16 0.7}
44. Qd3 {+0.71/16 0.8} Qe7 {+0.72/17 0.8} 45. Qe4 {+0.76/15 0.6} Qc7
{+0.90/17 0.8} 46. b4 {+0.76/15 0.9} Bf6 {-1.25/17 2.4} 47. Qd3
{+0.88/15 1.3} Be7 {+0.90/16 0.8} 48. Qd2 {+0.83/15 0.8} Qb8 {+0.88/16 1.4}
49. Rd3 {+0.85/15 1.2} Qc7 {+0.88/17 0.6} 50. Qe3 {+0.78/14 0.5} Bd8
{+0.88/16 2.7} 51. Qe2 {+0.64/13 1.1} Bg5 {+0.70/16 0.6} 52. Rd4
{+0.70/15 0.5} Kh8 {+0.86/16 1.5} 53. Re4 {+0.70/14 0.5} Qb8 {+0.88/15 0.3}
54. Nd5 {+0.75/15 0.6} Rf8 {+0.94/15 0.6} 55. f4 {+0.96/13 0.6} exf4
{+0.96/13 0.2} 56. f6 {+0.99/13 0.7} g6 {-1.05/13 0.3} 57. Re7
{+1.40/14 1.1} Qd8 {-1.33/14 0.4} 58. Qe4 {+1.92/14 0.8} Qb8 {-1.33/14 0.2}
59. Nxf4 {+2.22/12 0.6} d5 {-2.76/15 0.3} 60. Qxg6 {+2.22/11} Bxf6
{-2.46/16 0.3} 61. Qh6+ {+2.23/10} Kg8 {-2.46/12} 62. Nh5 {+1.93/13 1.0}
Bc3 {-2.66/19 1.4} 63. Qg5+ {+1.93/12} Rg6 {-2.42/20 2.0} 64. Qf5
{+2.00/14 2.0} Qd6 {-2.80/19 6} 65. Rxb7 {+2.93/13 1.1} Qe6 {-3.01/19 2.2}
66. Qf3 {+2.63/12 1.4} Qe4 {-2.78/16 1.2} 67. Rd3 {+2.67/13 2.0} Ba1
{-2.72/18 4} 68. Qxe4 {+3.18/13 1.2} dxe4 {-3.35/18 2.2} 69. Rd5
{+2.88/15 3} Re6 {-3.49/17 3} 70. Kf2 {+2.83/15 1.9} e3+ {-3.65/17 4} 71.
Ke2 {+2.83/14} Re4 {-3.65/18 1.2} 72. c5 {+3.24/15 3} Rc4 {-3.53/17 1.2}
73. Kxe3 {+3.26/14 1.0} Re8+ {-4.00/16 5} 74. Kd2 {+3.32/14 1.2} Rce4
{-3.73/16 1.2} 75. c6 {+3.80/13 1.4} Re2+ {-4.46/13 1.0} 76. Kd1 {+3.80/12}
Re1+ {-5.13/14 1.2} 77. Kc2 {+3.52/12} R8e2+ {-5.11/15 0.7} 78. Rd2
{+3.47/11 0.1} Re6 {-5.03/16 0.8} 79. Rb6 {+3.51/13 0.9} R6e3
{-3.19/16 2.6} 80. Rf2 {+3.76/14 0.7} Bd4 {-2.10/16 2.5} 81. Rxa6
{+1.61/15 6} Rc3+ {-2.44/15 0.2} 82. Kd2 {+1.19/14 0.1} Rec1 {-2.10/17 0.2}
83. Ra8+ {+0.23/16 5} Kh7 {-2.10/12} 84. Rxf7+ {+0.03/15 0.6} Kh6
{+0.00/18 0.5} 85. Raf8 {+0.09/16 4} R1c2+ {+0.00/19 0.3} 86. Ke1
{+0.12/16 0.7} Rc1+ {+0.00/19 0.5} 87. Ke2 {+0.12/17 0.5} R1c2+
{+0.00/21 0.5} 88. Kf1 {+0.12/17 1.3} Rxh3 {+0.00/22 0.4} 89. Rf6+
{+0.12/15 0.5} Bxf6 {+0.82/15 0.1} 90. Rxf6+ {+0.10/14} Kg5 {+0.80/17 0.4}
91. Rg6+ {+0.10/16 1.6} Kxg6 {+0.80/12} 92. Nf4+ {+0.08/15} Kh6
{+0.92/18 0.8} 93. g5+ {+0.04/16 0.8} Kg7 {+1.05/19 0.7} 94. Nxh3
{+0.04/15} Rxc6 {+0.86/19 0.4} 95. Kf2 {+0.04/18 1.0} Rc3 {+1.92/18 0.7}
96. Nf4 {+0.01/14 0.5} Rb3 {+2.43/18 0.3} 97. Nd5 {+0.01/14 0.5} Kg6
{+2.62/15 0.3} 98. a6 {-2.55/15 4} Kxg5 {+4.20/16 0.3} 99. Nc7
{-3.21/16 2.8} Ra3 {+5.61/17 0.4} 100. b5 {-3.32/15 0.5} Ra2+
{+6.54/19 0.7} 101. Kg1 {-3.32/13 0.4} Kg4 {+7.01/21 0.3} 102. Nd5
{-3.60/14 0.3} Kg3 {+8.12/21 0.4} 103. Ne3 {-3.84/16 0.3} Ra1+
{+9.29/20 0.3} 104. Nf1+ {-3.84/15} Kf3 {+9.59/22 0.2} 105. b6
{-5.51/16 0.7} Rxa6 {+9.59/21 0.5} 106. Kh2 {-5.54/18 0.3} Ke2
{+82.92/22 0.1} 107. Kh3 {-5.62/19 0.5}
{Xboard adjudication} 0-1
[/pgn]
