A bug in Stockfish 1.7.1

[Damir]

(970) CrapCleaner,Stockfish 1.7.1 JA (2655) - Phil Harris,Rybka 3 (2725) [A13]
Rated game, 5m + 0s Engine Room, 12.05.2010
[0.00;–0.25]
Rybka 3 (6 cores): 17.3 plies; 506kN/s Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz 4345MHz, Firestorm.ctg, 512 MB 1.c4 e6 B/0 0 2.Nf3 d5 B/0 0 3.g3 Nf6 B/0 0 4.b3 Nc6 -0.25/15 7 5.d4 (Bg2) 5...a5 -0.29/13 9 6.e3 Bb4+ (a4) -0.22/14 9 7.Bd2 0–0 -0.17/15 0 8.a3 Bd6 (Bxd2+) -0.20/17 0 9.Nc3 (c5) 9...dxc4 -0.12/15 16 10.bxc4 e5 -0.09/16 5 11.Be2 (d5) 11...exd4 -0.50/15 4 12.exd4 Bh3 -0.55/16 0 13.Ng5 Qd7 -0.50/17 0 14.Be3 Rfe8 -0.50/16 0 15.c5 (Nxh3) 15...Bf8 -0.67/15 7 16.Nxh3 Qxh3 -0.67/15 3 17.Qa4 (Qb3) 17...Rad8 -0.64/14 6 18.0–0–0 Ng4 -0.72/15 6 19.Bf1 (Bxg4) 19...Qh5 -0.72/13 0 20.Be2 Qf5 -0.72/15 0 21.Bxg4 Qxg4 -0.70/15 2 22.Kb2 Qf5 (g6) -0.71/14 19 23.h4 Rb8 (g6) -0.70/14 0 24.Ka1 Be7 -0.74/14 0 25.Rd2 (Qc4) 25...Bf6 -0.72/14 4 26.Rhd1 Rbd8 (Red8) -0.66/14 8 27.Qb3 g6 (b6) -0.65/14 0 28.Ka2 (Qb5) 28...Bg7 (Ne7) -0.44/13 10 29.d5 (Nb5) 29...Ne5 -0.23/13 7 30.d6 cxd6 (c6) -0.23/15 24 31.cxd6 (Nb5) 31...Qg4 (Qd7) -0.21/15 12 32.Rd4 (Bb6) 32...Qd7 -0.06/13 3 33.Na4 Qc6 0.00/15 4 34.Rc1 (Bg5) 34...Qf3 0.00/13 3 35.Rc7 (Rcd1) 35...Nd7 0.00/13 1 36.Rd2 (Qd5) 36...Qf5 0.00/13 3 37.Qd5 (Nc3) 37...Re5 (Be5) 0.00/14 3 38.Qd3 Qg4 (Qh3) 0.00/14 0 39.Qb3 Qf5 (b5) 0.00/15 0 40.Rxb7 h5 0.00/16 1 41.Nb2 (Qd3) 41...Rc8 (Nc5) 0.00/14 2 42.Rd3 Ree8 0.00/17 0 43.Rb5 (Qd5) 43...Re5 0.00/15 3 44.Rxe5 (Rb7) 44...Bxe5 -0.06/14 0 45.Rd5 Rb8 0.00/15 3 46.Rb5 Rxb5 0.00/17 3 47.Qxb5 Qe6+ (Qc2) 0.00/17 2 48.Qb3 Qxd6 0.00/18 0 49.Nc4 Qe7 (Qd5) 0.00/16 0 50.Nxa5 (Nxe5) 50...Bg7 0.00/14 1 51.Qc2 (Nc4) 51...Qf6 (Qd6) -0.01/13 2 52.Nb3 (Nc4) 52...Qe6 0.00/16 1 53.Ba7 (Qc8+) 53...Bf8 (Qg4) -0.06/15 1 54.Bd4 Nb6 -0.06/16 0 55.Bxb6 Qxb6 -0.04/18 1 56.a4 Qe6 -0.03/18 0 57.Qd3 (Kb1) 57...Bc5 (Bb4) -0.04/17 1 58.Qf3 (Qd8+) 58...Qc4 -0.15/17 1 59.Kb2 Bb4 (Bd6) -0.08/17 1 60.a5 Qa6 (Bf8) -0.08/18 0 61.Qe4 Qf6+ -0.06/18 0 62.Kb1 Bxa5 -0.05/19 1 63.Nxa5 Qb6+ -0.05/20 1 64.Kc2 Qxa5 -0.05/20 1 65.Kd3 Qa2 (Qa3+) -0.05/20 1 66.Qe8+ (Ke3) 66...Kg7 -0.05/21 1 67.Qe3 (Qe5+) 67...Qa6+ -0.05/18 0 68.Kd4 (Kd2) 68...Qd6+ (Qa7+) -0.05/18 0 69.Kc4 (Ke4) 69...Kh7 (Kf6) -0.05/19 1 70.Qd4 (Kc3) 70...Qa3 (Qa6+) -0.05/21 1 71.Kd5 (Qe3) 71...Qf3+ -0.05/18 0 72.Kc5 (Kc4) 72...Qb3 (Kg8) -0.05/20 1 73.Qf4 Qc3+ (Kg7) -0.05/21 0 74.Kd5 Qd3+ -0.05/22 0 75.Ke5 (Kc6) 75...Kg8 (Kg7) -0.05/21 1 76.Qe4 (Qe3) 76...Qd1 (f6+) -0.05/19 0 77.Qd4 (Qe3) 77...Qf3 -0.05/21 0 78.Qf4 Qb3 (Qd3) -0.05/21 0 79.Kd4 (Ke4) 79...Qc2 (Qb4+) -0.05/20 1 80.Qe3 (Ke3) 80...Qc6 (Qa4+) -0.05/21 1 81.Qe5 (Kd3) 81...Qf3 -0.05/20 0 82.Qe8+ (Qe3) 82...Kh7 (Kg7) -0.05/22 0 83.Qe3 Qg2 (Qf6+) -0.05/22 0 84.Qe2 (Qf4) 84...Qb7 (Qc6) -0.05/19 0 85.Qc2 (Qe3) 85...Kg7 (Qd7+) -0.05/19 2 86.Qc3 Kg8 (Kf6) -0.05/20 0 87.Ke3 (Qe3) 87...Qa7+ (Kf8) -0.05/20 0 88.Qd4 Qa3+ (Qxd4+) -0.04/22 0 89.Ke4 (Ke2) 89...Qb3 (Qe7+) -0.04/21 1 90.Kf4 (Qd8+) 90...Qb7 (Qb8+) -0.05/20 0 91.Qc5 (Ke3) 91...Qb8+ (Kg7) -0.05/19 1 92.Ke4 (Kg5) 92...Qb1+ -0.05/20 0 93.Ke5 (Ke3) 93...Qf5+ -0.05/17 0 94.Kd6 Qe6+ -0.05/19 0 95.Kc7 Qe4 (Qb3) -0.05/20 1 96.Kb6 (Kd6) 96...Qe8 (Qe6+) -0.05/18 0 97.Qd4 (Kc7) 97...Qc8 (Qe6+) -0.05/20 0 98.Kb5 Qc7 (Qf5+) -0.05/21 0 99.Qc5 (Qb6) 99...Qd8 (Qxc5+) -0.05/20 0 100.Kc4 (Kc6) 100...Qd1 (Qd2) -0.05/21 0 101.Qd4 Qe2+ (Qa4+) -0.05/21 0 102.Kc5 (Kc3) 102...Qe1 (Qf3) -0.05/20 0 103.Qf4 (Qd8+) 103...Qd1 (Qa5+) -0.05/19 0 104.f3 (Qe3) 104...Qc2+ (Qd3) -0.29/15 0 105.Kd4 Qb3 -0.13/17 0 106.Ke4 Qb1+ (Qc2+) -0.12/17 0 107.Kd5 (Ke3) 107...Qd3+ (Qb5+) -0.11/16 0 108.Ke5 Qc3+ (Qb5+) -0.11/18 0 109.Kd6 (Ke4) 109...Qb2 (Qd3+) -0.29/17 0 110.Kc7 (Kd5) 110...Qa1 (Qc2+) -0.29/18 0 111.Kd7 (Kd6) 111...Qb1 (Qa6) -0.29/19 1 112.Qe4 (Ke7) 112...Qb5+ -0.29/18 0 113.Ke7 (Kc8) 113...Qc5+ -0.29/18 0 114.Kd7 Qa7+ (Qb5+) -0.29/19 0 115.Kc8 Qf2 (Qc5+) -0.29/20 0 116.Qe8+ (Qf4) 116...Kg7 -0.29/18 0 117.Qe5+ Kh7 -0.13/20 0 118.Qf4 Kg8 (Kg7) -0.13/20 1 119.Kd7 Qa7+ (Qc5) -0.13/19 0 120.Kc6 (Kd6) 120...Qa8+ (Qa3) -0.13/19 1 121.Kc5 Qd8 (Qa3+) -0.13/19 0 122.Kc4 (Kc6) 122...Qd7 (Qd1) -0.13/17 0 123.Kc5 Qd3 (Qd8) -0.13/18 0 124.Qf6 (Qb8+) 124...Qd2 (Qa3+) -0.13/16 0 125.Kc4 Qd1 -0.13/19 0 126.Qc3 (Qf4) 126...Qe2+ -0.13/16 0 127.Qd3 Qe7 (Qa2+) -0.13/18 0 128.f4 Kg7 (Qc7+) -0.13/19 0 129.Qd4+ Kh7 (f6) -0.12/19 0 130.Qe5 Qa3 -0.12/19 0 131.Qe8 (Qf6) 131...Qa7 (Kg7) -0.12/17 0 132.Qf8 (Kd5) 132...Qa6+ (Qa4+) -0.09/17 0 133.Kd4 Qb6+ (Qf6+) -0.09/19 0 134.Qc5 (Kd5) 134...Qb2+ -0.12/16 0 135.Ke3 (Qc3) 135...Qg2 (Qb3+) -0.12/17 0 136.Qg5 Qg1+ -0.12/19 0 137.Ke4 (Ke2) 137...Qh1+ (Qb1+) -0.12/18 0 138.Ke5 Qc6 (Qa1+) -0.12/19 0 139.f5 (Kd4) 139...Kg7 (Qc3+) -0.12/16 0 140.f6+ Kf8 -0.12/18 0 141.Kd4 Qa4+ -0.12/19 0 142.Kd5 (Ke5) 142...Qb5+ -0.12/19 0 143.Ke4 Qb1+ (Qc4+) -0.12/20 0 144.Kd4 (Kf4) 144...Qa1+ (Qb4+) -0.11/20 0 145.Kc4 (Kd5) 145...Kg8 (Qa6+) -0.11/19 0 146.Kd3 (Qf4) 146...Qa6+ (Qa3+) -0.13/20 0 147.Kd4 Qa7+ (Qd6+) -0.12/21 0 148.Ke4 Qa4+ -0.12/22 0 149.Kd5 (Kf3) 149...Qa2+ -0.12/21 0 150.Kc5 (Kd4) 150...Qa7+ -0.12/21 0 151.Kb4 (Kd5) 151...Qb6+ (Qd4+) -0.12/20 0 152.Kc4 Qc6+ (Qa6+) -0.12/22 0 153.Kd4 Qd6+ (Qd7+) -0.11/22 0 154.Ke4 (Kc4) 154...Qb4+ (Qc6+) -0.12/22 0 155.Ke3 (Kf3) 155...Qc3+ -0.12/21 0 156.Ke2 (Kf2) 156...Qb2+ (Qc4+) -0.12/20 0 157.Kd3 (Kf3) 157...Qb1+ (Qb3+) -0.12/22 0 158.Kd4 (Ke3) 158...Qd1+ (Qa1+) -0.12/23 0 159.Kc5 (Ke3) 159...Qc2+ -0.12/21 0 160.Kd6 (Kd4) 160...Qd3+ -0.12/21 0 161.Ke5 (Kc5) 161...Qe2+ -0.12/21 0 162.Kf4 (Kd5) 162...Qf2+ (Qc4+) -0.12/23 0 163.Ke4 Qc2+ -0.12/23 0 164.Kf3 Qd3+ (Qc3+) -0.12/23 0 165.Kf4 (Kf2) 165...Qc4+ (Qd4+) -0.12/23 0 166.Ke3 (Kf3) 166...Qb3+ (Qc3+) -0.11/22 0 167.Kd2 Qa2+ (Qb2+) -0.11/23 0 168.Kc3 (Ke3) 168...Kh7 (Qa4) -0.12/19 0 169.Kd4 Qa1+ (Qa4+) -0.12/22 0 170.Kd3 (Ke4) 170...Qa6+ (Qa3+) -0.12/22 0 171.Ke3 Qe6+ (Qa3+) -0.12/24 0 172.Kd4 (Kf2) 172...Qd6+ -0.12/21 0 173.Kc4 (Ke4) 173...Qc6+ -0.12/22 0 174.Kb4 (Kd4) 174...Qb6+ (Qd6+) -0.12/20 0 175.Kc3 (Kc4) 175...Qd8 (Qd6) -0.12/20 0 176.Kc4 (Qe5) 176...Qe8 (Qc7+) -0.11/18 0 177.Qf4 Qg8 (Qd8) -0.11/19 0 178.Kb3 (Kd4) 178...g5 (Qe8) -0.41/14 0 179.hxg5 Qg6 (Kg6) -0.42/16 0 180.Kb2 Qd3 -0.61/16 0 181.Qb4 Qe2+ -0.61/15 0 182.Kb1 Qe8 (Qf1+) -0.61/15 0 183.Qe7 (Kc2) 183...Qb8+ (Qb5+) -0.69/15 0 184.Kc2 (Kc1) 184...Kg6 -0.69/15 0 185.Qe4+ Kxg5 -0.69/14 0 186.Qe3+ (Qd5+) 186...Kg6 -0.70/14 0 187.Qe4+ (Qd3+) 187...Kxf6 -0.70/14 0 188.Qh4+ (Qf3+) 188...Kg6 -0.70/15 0 189.Qe4+ Kg7 -0.70/16 0 190.Qd4+ Kg8 -0.70/17 0 191.Qe3 Qd6 -0.70/16 0 192.Qf3 Qc5+ (Qe5) -0.74/17 0 193.Kd2 (Kb3) 193...Kg7 -0.75/16 0 194.Qf4 (Qd3) 194...Qd5+ -0.75/15 0 195.Kc3 (Ke2) 195...f6 (Qc6+) -0.78/13 0 196.Kb4 Kg6 -0.87/14 0 197.Qh4 (Qb8) 197...Qd6+ (Qc6) -0.88/13 0 198.Kc3 (Kb5) 198...Qc5+ -0.88/15 0 199.Kb3 Qe3+ (Qc6) -0.88/17 0 200.Kc2 (Kb4) 200...Qe2+ -0.88/15 0 201.Kc3 Qf3+ -0.88/17 0 202.Kd2 (Kb4) 202...Qd5+ (Qf2+) -0.88/15 0 203.Ke3 (Kc3) 203...Qc5+ (Qe5+) -0.88/15 0 204.Kf3 (Kd3) 204...Qc3+ -0.88/17 0 205.Ke2 Qc2+ (Qe5+) -0.88/20 0 206.Ke3 Qb3+ -0.88/20 0 207.Kf2 (Kd2) 207...Qa2+ (Qb6+) -0.88/19 1 208.Kf3 Qa3+ -0.88/19 0 209.Ke2 Qa6+ -0.88/18 0 210.Kf2 (Ke3) 210...Qc6 (Qd3) -0.49/16 0 211.Qd4 (Qf4) 211...Qc2+ -0.49/15 0 212.Ke3 (Kf3) 212...Qc7 (Qb3+) -0.49/15 0 213.Qe4+ (Kf2) 213...Kg7 (f5) -0.48/13 0 214.Kf3 (Kf2) 214...Qd6 (Qc3+) -0.48/17 0 215.Qb7+ (Kg2) 215...Kh6 -0.49/17 0 216.Qe4 Qd1+ -0.48/19 0 217.Kf2 (Kg2) 217...Qd8 (Qd2+) -0.45/16 0 218.Ke3 (Qe6) 218...Qa5 (Kg7) -0.48/13 0 219.Qf4+ (Kf3) 219...Kg7 -0.49/15 0 220.Qc4 Qa3+ (Qe1+) -0.48/20 0 221.Kf2 Qd6 (Qb2+) -0.48/20 0 222.Qe4 Qe5 (Qd2+) -0.38/20 0 223.Kf3 Qc5 -0.29/19 0 224.Qb7+ (Kg2) 224...Kh6 -0.43/16 0 225.Qe4 Qb5 -0.39/20 0 226.Kf2 (Qe3+) 226...Qd7 (Qb2+) -0.38/17 0 227.Kf3 (Kg2) 227...Qf7 (Kg7) -0.38/16 0 228.Qd4 (Kg2) 228...Qb7+ -0.45/15 0 229.Qe4 Qd7 -0.38/20 0 230.Kf2 (Kg2) 230...Kg7 (Qf7) -0.38/17 0 231.Ke3 (Kg1) 231...Qd8 (Qa7+) -0.38/16 0 232.Qb7+ Kf8 (Kh8) -0.38/18 0 233.Qb4+ Kf7 (Qe7+) -0.38/19 0 234.Qb7+ Kg6 -0.37/20 0 235.Qe4+ Kh6 (f5) -0.37/19 0 236.Kf3 (Qe6) 236...Qc8 -0.38/17 0 237.Qe3+ Kg6 (Kg7) -0.32/18 0 238.Qe4+ f5 (Qf5+) -0.19/18 0 239.Qd5 Qc3+ -0.19/19 0 240.Ke2 (Kg2) 240...Qb2+ (Qf6) -0.19/13 0 241.Kf3 Qf6 (Kf6) -0.07/17 0 242.Qg8+ Kh6 0.00/20 0 243.Kf4 Qd4+ (h4) 0.00/21 0 244.Kxf5 . 244...Qf2+ (Qd3+) 0.00/27 0 245.Ke4 Qe1+ 0.00/26 0 246.Kd3 (Kf3) 246...Qf1+ 0.00/18 0 247.Kc3 (Ke3) 247...Qe2 0.00/15 0 248.Qh8+ (Qf8+) 248...Kg6 0.00/18 0 249.Qg8+ Kf5 0.00/20 0 250.Qf7+ (Qc8+) 250...Kg4 -0.31/7 0 251.Qf4+ (Qd7+) 251...Kh3 -0.31/15 0 252.Qh4+ Kg2 -0.31/17 0 253.Kd4 Qf3 -0.30/18 0 254.Kc4 (Kc5
) 254...Qf5 Time (Lag: Av=0.34s, max=10.5s) -0.30/13 0 0–1

Stockfish lost this game in complete drawish position.
Have fun Stockfish team.

[Sven]

(970) CrapCleaner,Stockfish 1.7.1 JA (2655) - Phil Harris,Rybka 3 (2725) [A13]
Rated game, 5m + 0s Engine Room, 12.05.2010
[...]
254.Kc4 (Kc5) 254...Qf5 Time (Lag: Av=0.34s, max=10.5s) -0.30/13 0 0–1

Stockfish lost this game in complete drawish position.
Have fun Stockfish team.

You mean "lost on time in a 254 moves 5m + 0s game", correct?

I guess it is not unusual to lose on time after a nearly infinite number of moves when getting no increment per move, so what is the bug you are worrying about? It was a queens endgame starting at move 64, so 190 moves were made until SF was the first to run out of time. The final position of the game was evaluated by SF as "nearly draw". I can't see any wrong behaviour since it is not possible to make hundreds of moves without consuming time on the clock.

Sven

[Damir]

This is not the first time it happened... I think Stockfish time management need to be looked at...