Beginners' chess position

[tpoppins]

From a game in progress:
[d]r1bqn1r1/3n3k/1p1p3b/1N1Pp2p/2P1P1pP/P1QB1pP1/1R1N1P1B/R6K w - - 4 35

Cute, isn't it?

If you saw this position at some other, not computer-chess-related site, you would probably judge White to be around 1200 Elo. Yet that estimate would be about 2000 Elo off -- this is a game between top engines.

Any guesses who White is? ;)

[MikeGL]

From a game in progress:
[d]r1bqn1r1/3n3k/1p1p3b/1N1Pp2p/2P1P1pP/P1QB1pP1/1R1N1P1B/R6K w - - 4 35

Cute, isn't it?

If you saw this position at some other, not computer-chess-related site, you would probably judge White to be around 1200 Elo. Yet that estimate would be about 2000 Elo off -- this is a game between top engines.

Any guesses who White is?

Maybe White is SF8 and black is Komodo, or Houdini.
What's the complete pgn.

[Eelco de Groot]

It's not a typical computer position. It seems Black played really well or White really bad, but not like computers. I see not much for White; you would like to push c5 perhaps, I don't know I'm that 1200 player , but if bxc5 you can double your rooks on the b file but the knight on b5 is terribly in the way and can't leave pawn a3 undefended.

[MikeGL]

From a game in progress:
[d]r1bqn1r1/3n3k/1p1p3b/1N1Pp2p/2P1P1pP/P1QB1pP1/1R1N1P1B/R6K w - - 4 35

Cute, isn't it?

If you saw this position at some other, not computer-chess-related site, you would probably judge White to be around 1200 Elo. Yet that estimate would be about 2000 Elo off -- this is a game between top engines.

Any guesses who White is?

Maybe White is SF8 and black is Komodo, or Houdini.
What's the complete pgn.

Sorry, I changed my mind. After counting the pawns I am sure black is Houdini, because I noticed on all Houdini games recently that it likes to give up pawns for piece activity.

My guesstimate:
Black-Houdini
White-Komodo

[Lyudmil Tsvetkov]

From a game in progress:
[d]r1bqn1r1/3n3k/1p1p3b/1N1Pp2p/2P1P1pP/P1QB1pP1/1R1N1P1B/R6K w - - 4 35

Cute, isn't it?

If you saw this position at some other, not computer-chess-related site, you would probably judge White to be around 1200 Elo. Yet that estimate would be about 2000 Elo off -- this is a game between top engines.

Any guesses who White is?

They don't want to implement the relevant knowledge in 'The Secret of Chess'.
An f2,g3 white pawns, f3-g4 black pawns, with a white bishop on g1 or h2 is penalised there severely, more than 2 full pawns.

[Lyudmil Tsvetkov]

From a game in progress:
[d]r1bqn1r1/3n3k/1p1p3b/1N1Pp2p/2P1P1pP/P1QB1pP1/1R1N1P1B/R6K w - - 4 35

Cute, isn't it?

If you saw this position at some other, not computer-chess-related site, you would probably judge White to be around 1200 Elo. Yet that estimate would be about 2000 Elo off -- this is a game between top engines.

Any guesses who White is?

Maybe White is SF8 and black is Komodo, or Houdini.
What's the complete pgn.

Sorry, I changed my mind. After counting the pawns I am sure black is Houdini, because I noticed on all Houdini games recently that it likes to give up pawns for piece activity.

My guesstimate:
Black-Houdini
White-Komodo

Of the 3 top engines, Komodo indeed has the most severe problems with mobility for individual pieces, but I would be very much surprised if one of the top engines is involved in this.
The black win is simply too obvious.

[Uri Blass]

From a game in progress:
[d]r1bqn1r1/3n3k/1p1p3b/1N1Pp2p/2P1P1pP/P1QB1pP1/1R1N1P1B/R6K w - - 4 35

Cute, isn't it?

If you saw this position at some other, not computer-chess-related site, you would probably judge White to be around 1200 Elo. Yet that estimate would be about 2000 Elo off -- this is a game between top engines.

Any guesses who White is?

No

I see no way to estimate elo of white based on the position without seeing the moves.

[chessmobile]

I say Stockfish is white and Komodo black.

[tpoppins]

[pgn][Event "asmFish 051117 64-bit 40/40 Gauntlet"]
[Site "CCRL"]
[Date "2017.11.29"]
[Round "27"]
[White "asmFish 051117 64-bit"]
[Black "Houdini 6 64-bit"]
[Result "0-1"]
[ECO "A45"]
[Opening "Queen's pawn game"]
[PlyCount "281"]
[Termination "adjudication"]
[TimeControl "40/1260"]

1. d4 {book} Nf6 {book} 2. Bf4 {book} g6 {book} 3. e3 {book} Bg7 {book}
4. h3 {book} d6 {book} 5. Nf3 {book} O-O {book} 6. c4 {book} Nc6 {book}
7. Nc3 {book} Nd7 {book} 8. Be2 {+0.27/28 42s} h6 {-0.26/25 133s}
9. Bh2 {+0.26/29 51s} e5 {-0.14/20 18s} 10. O-O {+0.34/27 9.0s}
b6 {-0.23/25 207s} 11. a3 {+0.30/26 33s} a5 {-0.23/22 24s}
12. Re1 {+0.39/25 12s} Kh8 {-0.22/23 34s} 13. Qa4 {+0.48/28 53s}
Bb7 {-0.49/22 23s} 14. Rad1 {+0.47/27 15s} f5 {-0.33/23 48s}
15. Qc2 {+0.36/25 66s} Kh7 {-0.35/22 100s} 16. Bg3 {+0.44/26 47s}
Kh8 {-0.23/22 48s} 17. d5 {+0.55/22 11s} Ne7 {-0.23/20 23s}
18. b4 {+0.16/29 184s} Bc8 {-0.23/22 20s} 19. e4 {+0.17/27 41s}
f4 {-0.13/23 15s} 20. Bh2 {+0.05/26 23s} g5 {-0.05/23 28s}
21. Nb5 {+0.09/25 17s} Ng6 {-0.21/24 33s} 22. Rb1 {+0.19/26 24s}
h5 {-0.14/21 19s} 23. Nd2 {+0.32/24 13s} Nh4 {-0.09/22 34s}
24. bxa5 {+0.07/31 239s} Nf6 {+0.07/22 26s} 25. axb6 {0.00/24 11s}
cxb6 {+0.28/21 15s} 26. Kh1 {0.00/27 26s} g4 {+0.33/22 37s}
27. Rb3 {0.00/27 24s} Bh6 {+0.09/21 44s} 28. Qc3 {0.00/23 31s}
Rg8 {+0.30/21 28s} 29. g3 {-0.31/28 150s} Ng6 {+0.73/19 13s}
30. h4 {-0.25/22 6.7s} Kh7 {+0.92/19 22s} 31. Rb2 {-0.30/22 11s}
Ne8 {+0.91/19 16s} 32. Rg1 {-0.17/23 9.2s} f3 {+0.90/22 56s}
33. Bd3 {0.00/22 7.0s} Nf8 {+1.08/20 11s} 34. Ra1 {+0.17/23 11s}
Nd7 {+1.00/25 34s} 35. Nb3 {0.00/29 6.7s} Nc5 {+0.93/24 26s}
36. Nxc5 {0.00/34 6.0s} bxc5 {+0.93/23 0.006s} 37. Qe1 {0.00/36 37s}
Rg7 {+0.86/24 31s} 38. Bc2 {0.00/35 4.1s} Rb7 {+1.02/24 29s}
39. Rab1 {0.00/35 7.7s} Rb6 {+1.22/25 14s} 40. a4 {-0.15/34 34s}
Nf6 {+1.14/29 51s} 41. Bg1 {-0.05/32 26s} Nd7 {+1.31/26 29s}
42. Qc3 {-0.21/34 45s} Rba6 {+1.40/33 48s} 43. Ra2 {-0.21/37 19s}
Nb6 {+1.33/30 23s} 44. Rba1 {-0.21/36 28s} Ra5 {+1.33/31 53s}
45. Bh2 {-0.17/36 50s} Bf8 {+1.34/29 7.6s} 46. Qb3 {-0.14/33 16s}
Bd7 {+1.34/30 44s} 47. Qd3 {-0.17/37 94s} R8a6 {+1.34/29 37s}
48. Nc3 {-0.17/35 30s} Bh6 {+1.34/27 12s} 49. Bg1 {-0.17/36 18s}
Ra8 {+1.34/31 48s} 50. Nb5 {-0.17/39 33s} Be8 {+1.34/32 40s}
51. Bh2 {-0.17/37 17s} Qe7 {+1.34/31 45s} 52. Qc3 {-0.17/37 21s}
Kg8 {+1.20/31 149s} 53. Qd3 {-0.17/38 18s} Qd8 {+1.20/24 6.1s}
54. Bg1 {-0.17/39 22s} Bf8 {+1.20/28 37s} 55. Nc3 {-0.17/38 22s}
Kh7 {+1.20/27 36s} 56. Qf1 {-0.17/40 78s} Kg6 {+1.06/26 62s}
57. Qd3 {-0.32/42 271s} Bh6 {+1.08/26 53s} 58. Nb5 {-0.32/39 28s}
R5a6 {+1.04/25 20s} 59. Bd1 {-0.24/30 27s} Kh7 {+0.95/27 60s}
60. Qc3 {-0.32/31 39s} Kg8 {+0.91/26 75s} 61. Bc2 {-0.17/35 9.0s}
Nd7 {+1.24/26 14s} 62. Rb2 {-0.39/39 42s} Rb6 {+1.09/24 27s}
63. Raa2 {-0.39/36 16s} Nb8 {+1.22/27 17s} 64. a5 {-0.39/36 7.1s}
Rba6 {+1.22/26 0.010s} 65. Ra1 {-0.39/42 21s} Nd7 {+1.22/28 12s}
66. Rba2 {-0.39/42 12s} Nf6 {+1.36/27 12s} 67. Qe1 {-0.39/45 27s}
Bf8 {+1.54/26 13s} 68. Ra3 {-0.58/37 52s} Be7 {+1.62/24 12s}
69. R1a2 {-0.58/37 18s} Bg6 {+1.37/27 99s} 70. Qa1 {-0.58/37 25s}
Rb8 {+1.38/28 25s} 71. Nc3 {-0.58/31 48s} Bf8 {+1.38/27 14s}
72. Qc1 {-0.43/28 8.3s} Kh7 {+1.38/27 12s} 73. Bd3 {-0.43/31 4.2s}
Bg7 {+1.38/28 10s} 74. Qd1 {-0.43/36 13s} Rba8 {+1.38/27 13s}
75. Qa1 {-0.43/34 3.8s} R8a7 {+1.38/28 12s} 76. Nb5 {-0.43/35 12s}
Rb7 {+1.38/29 14s} 77. Qc1 {-0.43/35 6.8s} Bh6 {+1.38/29 14s}
78. Qe1 {-0.43/34 6.7s} Kg8 {+1.37/27 4.8s} 79. Bc2 {-0.43/37 20s}
Rb8 {+1.38/28 18s} 80. Nc3 {-0.43/36 6.8s} Rba8 {+1.37/28 31s}
81. Qa1 {-0.43/37 19s} Kh7 {+1.19/28 114s} 82. Bd3 {-0.43/40 21s}
Be8 {+1.12/30 50s} 83. Qb1 {-0.43/41 21s} Bg7 {+1.12/31 47s}
84. Nb5 {-0.43/42 22s} Bf8 {+1.12/28 59s} 85. Nc3 {-0.43/37 25s}
Bg6 {+1.12/29 85s} 86. Qa1 {-0.43/39 46s} Kg8 {+0.97/29 39s}
87. Bc2 {-0.60/40 168s} Bh6 {+0.97/28 44s} 88. Bb1 {-0.60/37 50s}
Qc7 {+0.93/28 51s} 89. Bd3 {-0.60/34 13s} Bf8 {+1.01/26 27s}
90. Qe1 {-0.60/35 17s} Be7 {+1.04/28 22s} 91. Qb1 {-0.60/38 58s}
Bd8 {+1.16/26 20s} 92. Nb5 {-0.74/35 40s} Qe7 {+1.26/28 58s}
93. Rb3 {-0.75/35 39s} Rxa5 {+1.45/27 17s} 94. Rxa5 {-0.75/34 19s}
Rxa5 {+1.32/26 4.5s} 95. Nc3 {-0.82/36 97s} Ra7 {+1.46/24 0.039s}
96. Rb8 {-0.82/36 16s} Kg7 {+1.31/30 40s} 97. Nb5 {-0.60/35 9.3s}
Rb7 {+1.32/30 23s} 98. Ra8 {-0.60/35 30s} Qd7 {+1.31/29 34s}
99. Ra2 {-0.78/34 36s} Be7 {+1.31/29 27s} 100. Bh2 {-0.86/35 49s}
Qd8 {+1.49/26 15s} 101. Qe1 {-0.80/34 12s} Qb8 {+1.59/27 19s}
102. Qa1 {-0.59/33 12s} Qh8 {+1.60/29 42s} 103. Nc3 {-0.67/37 42s}
Qh6 {+1.42/30 48s} 104. Qd1 {-0.76/37 23s} Qh7 {+1.44/29 14s}
105. Qc2 {-0.81/38 19s} Kg8 {+1.51/29 20s} 106. Ra8+ {-0.81/30 17s}
Bf8 {+1.43/28 6.0s} 107. Qa2 {-0.77/33 14s} Ne8 {+1.36/30 64s}
108. Qa1 {-0.83/34 35s} Rb3 {+1.50/26 15s} 109. Bc2 {-0.70/33 13s}
Rb4 {+1.46/30 20s} 110. Bd3 {-0.62/35 39s} Qh6 {+1.46/30 17s}
111. Ra2 {-0.72/37 33s} Rb7 {+1.43/27 15s} 112. Bg1 {-0.73/34 28s}
Qh7 {+1.36/29 46s} 113. Ra5 {-0.76/36 58s} Qd7 {+1.29/28 56s}
114. Bc2 {-0.75/36 18s} Qe7 {+1.29/27 11s} 115. Qa4 {-0.75/33 18s}
Rb4 {+1.18/25 21s} 116. Qa2 {-0.75/34 15s} Qg7 {+1.30/25 17s}
117. Ra8 {-0.59/32 21s} Qh6 {+0.80/26 27s} 118. Rc8 {-0.50/31 8.0s}
Nf6 {+1.20/20 3.8s} 119. Bd3 {-0.50/33 13s} Be8 {+1.05/25 13s}
120. Qc2 {-0.66/35 24s} Qh7 {+1.03/25 9.8s} 121. Qd2 {-0.68/35 37s}
Qd7 {+1.05/26 46s} 122. Ra8 {-0.75/33 30s} Qb7 {+1.52/26 26s}
123. Ra5 {-0.86/39 59s} Rb6 {+1.41/29 53s} 124. Qg5+ {-0.86/40 28s}
Bg7 {+1.99/32 27s} 125. Nd1 {-1.13/38 90s} Ra6 {+1.99/34 11s}
126. Rxa6 {-1.69/41 36s} Qxa6 {+1.99/33 0.011s} 127. Bc2 {-1.75/43 22s}
Kh7 {+2.72/29 24s} 128. Qf5+ {-2.65/43 141s} Bg6 {+3.34/30 24s}
129. Qe6 {-2.65/42 10s} Qxc4 {+3.34/29 0.010s} 130. Ne3 {-2.66/42 18s}
Qa6 {+3.47/31 23s} 131. Qe7 {-2.66/44 44s} Qb6 {+3.64/30 24s}
132. Kh2 {-3.87/38 55s} Qb8 {+3.97/30 26s} 133. Kh1 {-3.95/43 46s}
Nxe4 {+3.53/31 33s} 134. Bxe4 {-3.75/39 15s} Bxe4 {+4.31/32 24s}
135. Qe6 {-5.07/41 71s} Qf8 {+5.33/32 27s} 136. Kh2 {-5.15/45 37s}
Bd3 {+5.33/34 24s} 137. Kh1 {-5.15/44 15s} c4 {+9.77/31 27s}
138. Qd7 {-9.91/41 85s} c3 {+9.76/30 0.001s} 139. Qa4 {-10.80/35 33s}
e4 {+14.05/31 80s} 140. Qd7 {-11.50/39 44s} Kh8 {+14.05/30 0.002s}
141. Qa7 {-11.83/41 36s, Black wins by adjudication} 0-1[/pgn]

Mike and Chris -- good guesses, thank you.

Lyudmil could have come right out and said "Drawfish" but he preferred to be a good sport. ;)

Eelco: although White was in effect a piece down, it did have a strong clamp on the queenside -- you spotted that right. It took Houdini about 100 moves to infiltrate, neutralize, subvert and convert. Drawfish was relentlessly, ruthlessly ground down.

I used to not think much of engine games, but something like this makes you stop and take notice. Thanks to Robert Houdart for such an amazing engine.

[Lyudmil Tsvetkov]

[pgn][Event "asmFish 051117 64-bit 40/40 Gauntlet"]
[Site "CCRL"]
[Date "2017.11.29"]
[Round "27"]
[White "asmFish 051117 64-bit"]
[Black "Houdini 6 64-bit"]
[Result "0-1"]
[ECO "A45"]
[Opening "Queen's pawn game"]
[PlyCount "281"]
[Termination "adjudication"]
[TimeControl "40/1260"]

1. d4 {book} Nf6 {book} 2. Bf4 {book} g6 {book} 3. e3 {book} Bg7 {book}
4. h3 {book} d6 {book} 5. Nf3 {book} O-O {book} 6. c4 {book} Nc6 {book}
7. Nc3 {book} Nd7 {book} 8. Be2 {+0.27/28 42s} h6 {-0.26/25 133s}
9. Bh2 {+0.26/29 51s} e5 {-0.14/20 18s} 10. O-O {+0.34/27 9.0s}
b6 {-0.23/25 207s} 11. a3 {+0.30/26 33s} a5 {-0.23/22 24s}
12. Re1 {+0.39/25 12s} Kh8 {-0.22/23 34s} 13. Qa4 {+0.48/28 53s}
Bb7 {-0.49/22 23s} 14. Rad1 {+0.47/27 15s} f5 {-0.33/23 48s}
15. Qc2 {+0.36/25 66s} Kh7 {-0.35/22 100s} 16. Bg3 {+0.44/26 47s}
Kh8 {-0.23/22 48s} 17. d5 {+0.55/22 11s} Ne7 {-0.23/20 23s}
18. b4 {+0.16/29 184s} Bc8 {-0.23/22 20s} 19. e4 {+0.17/27 41s}
f4 {-0.13/23 15s} 20. Bh2 {+0.05/26 23s} g5 {-0.05/23 28s}
21. Nb5 {+0.09/25 17s} Ng6 {-0.21/24 33s} 22. Rb1 {+0.19/26 24s}
h5 {-0.14/21 19s} 23. Nd2 {+0.32/24 13s} Nh4 {-0.09/22 34s}
24. bxa5 {+0.07/31 239s} Nf6 {+0.07/22 26s} 25. axb6 {0.00/24 11s}
cxb6 {+0.28/21 15s} 26. Kh1 {0.00/27 26s} g4 {+0.33/22 37s}
27. Rb3 {0.00/27 24s} Bh6 {+0.09/21 44s} 28. Qc3 {0.00/23 31s}
Rg8 {+0.30/21 28s} 29. g3 {-0.31/28 150s} Ng6 {+0.73/19 13s}
30. h4 {-0.25/22 6.7s} Kh7 {+0.92/19 22s} 31. Rb2 {-0.30/22 11s}
Ne8 {+0.91/19 16s} 32. Rg1 {-0.17/23 9.2s} f3 {+0.90/22 56s}
33. Bd3 {0.00/22 7.0s} Nf8 {+1.08/20 11s} 34. Ra1 {+0.17/23 11s}
Nd7 {+1.00/25 34s} 35. Nb3 {0.00/29 6.7s} Nc5 {+0.93/24 26s}
36. Nxc5 {0.00/34 6.0s} bxc5 {+0.93/23 0.006s} 37. Qe1 {0.00/36 37s}
Rg7 {+0.86/24 31s} 38. Bc2 {0.00/35 4.1s} Rb7 {+1.02/24 29s}
39. Rab1 {0.00/35 7.7s} Rb6 {+1.22/25 14s} 40. a4 {-0.15/34 34s}
Nf6 {+1.14/29 51s} 41. Bg1 {-0.05/32 26s} Nd7 {+1.31/26 29s}
42. Qc3 {-0.21/34 45s} Rba6 {+1.40/33 48s} 43. Ra2 {-0.21/37 19s}
Nb6 {+1.33/30 23s} 44. Rba1 {-0.21/36 28s} Ra5 {+1.33/31 53s}
45. Bh2 {-0.17/36 50s} Bf8 {+1.34/29 7.6s} 46. Qb3 {-0.14/33 16s}
Bd7 {+1.34/30 44s} 47. Qd3 {-0.17/37 94s} R8a6 {+1.34/29 37s}
48. Nc3 {-0.17/35 30s} Bh6 {+1.34/27 12s} 49. Bg1 {-0.17/36 18s}
Ra8 {+1.34/31 48s} 50. Nb5 {-0.17/39 33s} Be8 {+1.34/32 40s}
51. Bh2 {-0.17/37 17s} Qe7 {+1.34/31 45s} 52. Qc3 {-0.17/37 21s}
Kg8 {+1.20/31 149s} 53. Qd3 {-0.17/38 18s} Qd8 {+1.20/24 6.1s}
54. Bg1 {-0.17/39 22s} Bf8 {+1.20/28 37s} 55. Nc3 {-0.17/38 22s}
Kh7 {+1.20/27 36s} 56. Qf1 {-0.17/40 78s} Kg6 {+1.06/26 62s}
57. Qd3 {-0.32/42 271s} Bh6 {+1.08/26 53s} 58. Nb5 {-0.32/39 28s}
R5a6 {+1.04/25 20s} 59. Bd1 {-0.24/30 27s} Kh7 {+0.95/27 60s}
60. Qc3 {-0.32/31 39s} Kg8 {+0.91/26 75s} 61. Bc2 {-0.17/35 9.0s}
Nd7 {+1.24/26 14s} 62. Rb2 {-0.39/39 42s} Rb6 {+1.09/24 27s}
63. Raa2 {-0.39/36 16s} Nb8 {+1.22/27 17s} 64. a5 {-0.39/36 7.1s}
Rba6 {+1.22/26 0.010s} 65. Ra1 {-0.39/42 21s} Nd7 {+1.22/28 12s}
66. Rba2 {-0.39/42 12s} Nf6 {+1.36/27 12s} 67. Qe1 {-0.39/45 27s}
Bf8 {+1.54/26 13s} 68. Ra3 {-0.58/37 52s} Be7 {+1.62/24 12s}
69. R1a2 {-0.58/37 18s} Bg6 {+1.37/27 99s} 70. Qa1 {-0.58/37 25s}
Rb8 {+1.38/28 25s} 71. Nc3 {-0.58/31 48s} Bf8 {+1.38/27 14s}
72. Qc1 {-0.43/28 8.3s} Kh7 {+1.38/27 12s} 73. Bd3 {-0.43/31 4.2s}
Bg7 {+1.38/28 10s} 74. Qd1 {-0.43/36 13s} Rba8 {+1.38/27 13s}
75. Qa1 {-0.43/34 3.8s} R8a7 {+1.38/28 12s} 76. Nb5 {-0.43/35 12s}
Rb7 {+1.38/29 14s} 77. Qc1 {-0.43/35 6.8s} Bh6 {+1.38/29 14s}
78. Qe1 {-0.43/34 6.7s} Kg8 {+1.37/27 4.8s} 79. Bc2 {-0.43/37 20s}
Rb8 {+1.38/28 18s} 80. Nc3 {-0.43/36 6.8s} Rba8 {+1.37/28 31s}
81. Qa1 {-0.43/37 19s} Kh7 {+1.19/28 114s} 82. Bd3 {-0.43/40 21s}
Be8 {+1.12/30 50s} 83. Qb1 {-0.43/41 21s} Bg7 {+1.12/31 47s}
84. Nb5 {-0.43/42 22s} Bf8 {+1.12/28 59s} 85. Nc3 {-0.43/37 25s}
Bg6 {+1.12/29 85s} 86. Qa1 {-0.43/39 46s} Kg8 {+0.97/29 39s}
87. Bc2 {-0.60/40 168s} Bh6 {+0.97/28 44s} 88. Bb1 {-0.60/37 50s}
Qc7 {+0.93/28 51s} 89. Bd3 {-0.60/34 13s} Bf8 {+1.01/26 27s}
90. Qe1 {-0.60/35 17s} Be7 {+1.04/28 22s} 91. Qb1 {-0.60/38 58s}
Bd8 {+1.16/26 20s} 92. Nb5 {-0.74/35 40s} Qe7 {+1.26/28 58s}
93. Rb3 {-0.75/35 39s} Rxa5 {+1.45/27 17s} 94. Rxa5 {-0.75/34 19s}
Rxa5 {+1.32/26 4.5s} 95. Nc3 {-0.82/36 97s} Ra7 {+1.46/24 0.039s}
96. Rb8 {-0.82/36 16s} Kg7 {+1.31/30 40s} 97. Nb5 {-0.60/35 9.3s}
Rb7 {+1.32/30 23s} 98. Ra8 {-0.60/35 30s} Qd7 {+1.31/29 34s}
99. Ra2 {-0.78/34 36s} Be7 {+1.31/29 27s} 100. Bh2 {-0.86/35 49s}
Qd8 {+1.49/26 15s} 101. Qe1 {-0.80/34 12s} Qb8 {+1.59/27 19s}
102. Qa1 {-0.59/33 12s} Qh8 {+1.60/29 42s} 103. Nc3 {-0.67/37 42s}
Qh6 {+1.42/30 48s} 104. Qd1 {-0.76/37 23s} Qh7 {+1.44/29 14s}
105. Qc2 {-0.81/38 19s} Kg8 {+1.51/29 20s} 106. Ra8+ {-0.81/30 17s}
Bf8 {+1.43/28 6.0s} 107. Qa2 {-0.77/33 14s} Ne8 {+1.36/30 64s}
108. Qa1 {-0.83/34 35s} Rb3 {+1.50/26 15s} 109. Bc2 {-0.70/33 13s}
Rb4 {+1.46/30 20s} 110. Bd3 {-0.62/35 39s} Qh6 {+1.46/30 17s}
111. Ra2 {-0.72/37 33s} Rb7 {+1.43/27 15s} 112. Bg1 {-0.73/34 28s}
Qh7 {+1.36/29 46s} 113. Ra5 {-0.76/36 58s} Qd7 {+1.29/28 56s}
114. Bc2 {-0.75/36 18s} Qe7 {+1.29/27 11s} 115. Qa4 {-0.75/33 18s}
Rb4 {+1.18/25 21s} 116. Qa2 {-0.75/34 15s} Qg7 {+1.30/25 17s}
117. Ra8 {-0.59/32 21s} Qh6 {+0.80/26 27s} 118. Rc8 {-0.50/31 8.0s}
Nf6 {+1.20/20 3.8s} 119. Bd3 {-0.50/33 13s} Be8 {+1.05/25 13s}
120. Qc2 {-0.66/35 24s} Qh7 {+1.03/25 9.8s} 121. Qd2 {-0.68/35 37s}
Qd7 {+1.05/26 46s} 122. Ra8 {-0.75/33 30s} Qb7 {+1.52/26 26s}
123. Ra5 {-0.86/39 59s} Rb6 {+1.41/29 53s} 124. Qg5+ {-0.86/40 28s}
Bg7 {+1.99/32 27s} 125. Nd1 {-1.13/38 90s} Ra6 {+1.99/34 11s}
126. Rxa6 {-1.69/41 36s} Qxa6 {+1.99/33 0.011s} 127. Bc2 {-1.75/43 22s}
Kh7 {+2.72/29 24s} 128. Qf5+ {-2.65/43 141s} Bg6 {+3.34/30 24s}
129. Qe6 {-2.65/42 10s} Qxc4 {+3.34/29 0.010s} 130. Ne3 {-2.66/42 18s}
Qa6 {+3.47/31 23s} 131. Qe7 {-2.66/44 44s} Qb6 {+3.64/30 24s}
132. Kh2 {-3.87/38 55s} Qb8 {+3.97/30 26s} 133. Kh1 {-3.95/43 46s}
Nxe4 {+3.53/31 33s} 134. Bxe4 {-3.75/39 15s} Bxe4 {+4.31/32 24s}
135. Qe6 {-5.07/41 71s} Qf8 {+5.33/32 27s} 136. Kh2 {-5.15/45 37s}
Bd3 {+5.33/34 24s} 137. Kh1 {-5.15/44 15s} c4 {+9.77/31 27s}
138. Qd7 {-9.91/41 85s} c3 {+9.76/30 0.001s} 139. Qa4 {-10.80/35 33s}
e4 {+14.05/31 80s} 140. Qd7 {-11.50/39 44s} Kh8 {+14.05/30 0.002s}
141. Qa7 {-11.83/41 36s, Black wins by adjudication} 0-1[/pgn]

Mike and Chris -- good guesses, thank you.

Lyudmil could have come right out and said "Drawfish" but he preferred to be a good sport.

Eelco: although White was in effect a piece down, it did have a strong clamp on the queenside -- you spotted that right. It took Houdini about 100 moves to infiltrate, neutralize, subvert and convert. Drawfish was relentlessly, ruthlessly ground down.

I used to not think much of engine games, but something like this makes you stop and take notice. Thanks to Robert Houdart for such an amazing engine.

I can't believe this is Stockfish.
I have not followed Stockfish development at all during the last months, but, if this is indeed Stockfish and you are not joking(as usual), then it has regressed a lot.

I don't know, Stockfish never has that severe problems with mobility in my games, Komodo on the other hand has, though I believed it was some weaker engine.