Endless theme tourney

[Rodolfo Leoni]

Partecipants:

Andscacs091
Arasanx-64-popcnt
AsmFishW_2017-05-22_popcnt
BrainFish_170622_x64_modern
Critter_1.6a_64bit
Equinox 3.30-x64
Fire 5 x64
Fizbo19x64
Hannibal1.7x64
Ice3-x64-modern
Komodo-9.02-64bit
McBrain_2017_v25_x64_modern
Pedone_1.6_win64
Seagull
Stockfish_17062902_x64_modern
Stockfish_8_x64_popcnt
Strelka_5.5x64
Texel64

2 Round Robins
New Stockfish developement versions can be included while tourney is running, as well as new engine versions.
Engine authors can ask to include their engines
TC: 30 mins +15 secs per move
4 Threads, ponder off
Hash: 1 GB
Hardware: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz with 3.9 GB Memory

Thematic position after
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.
Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6
gxf6 15. gxf6 Bf8 16. Rg1 h5

[D] r1b1kb1r/2q2p2/p2ppP2/1pn4p/3NP3/2N2Q2/PPP4P/2KR1BR1 w kq 0 17;

Any suggestion to make this test more interesting is welcome.

[Rodolfo Leoni]

A great game from Andscacs!

I guess Texel weak move was 18. .. Bb7

[pgn]
[Event "B99y Top Engines"]
[Site "UTENTE-PC"]
[Date "2017.07.01"]
[Round "1"]
[White "Andscacs091"]
[Black "Texel64"]
[Result "1-0"]
[ECO "B99"]
[Opening "Sicilian"]
[TimeControl "1800+15"]
[Termination "adjudication"]
[PlyCount "102"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.
Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6
gxf6 15. gxf6 Bf8 16. Rg1 h5 17. a3 {+0.01/19 69} Qb6 {0.00/20 72} 18. Rg7
{+0.73/23 75} Bb7 {-0.07/19 89} 19. Bh3 {+1.63/24 76} b4 {-1.34/21 241} 20.
axb4 {+1.42/25 70} Qxb4 {-1.75/21 64} 21. Qg2 {+1.41/25 57} Rc8 {-1.90/20
152} 22. Bxe6 {+1.33/25 152} Nxe6 {-2.19/20 54} 23. Nxe6 {+1.57/24 65} Rxc3
{-2.39/20 65} 24. bxc3 {+1.75/26 117} Qxc3 {-2.16/20 54} 25. Nxf8 {+1.66/23
46} Rxf8 {-1.99/20 53} 26. Rg5 {+1.72/28 71} Qa1+ {-1.75/18 54} 27. Kd2
{+1.26/4 0} Qxf6 {-1.57/19 51} 28. Rxh5 {+1.76/26 49} Qd4+ {-1.61/17 48}
29. Ke1 {+1.93/25 70} Qb4+ {-1.58/18 49} 30. Kf2 {+1.85/28 50} Bxe4
{-1.42/18 48} 31. Qg7 {+1.71/27 96} f6 {-1.78/19 48} 32. Qc7 {+1.76/26 52}
d5 {-1.91/19 45} 33. Rh4 {+1.72/26 38} Rg8 {-1.73/20 52} 34. Qc6+ {+1.75/28
52} Ke7 {-1.38/20 45} 35. Qxd5 {+1.84/28 51} Qb6+ {-1.47/21 51} 36. Qd4
{+2.05/27 56} Qxd4+ {-1.57/21 41} 37. Rxd4 {+2.08/29 34} Bxc2 {-1.61/21 41}
38. Rc4 {+2.15/28 58} Bd3 {-1.63/21 41} 39. Rc6 {+2.44/28 90} Rb8 {-1.74/21
40} 40. Rh6 {+2.40/30 36} Rb1 {-1.87/21 39} 41. Ke3 {+2.97/28 32} Rb3
{-2.06/21 47} 42. Kd4 {+3.13/33 78} a5 {-2.17/20 45} 43. Rcxf6 {+3.34/31
69} a4 {-2.11/21 37} 44. Rc6 {+3.38/31 46} Kd7 {-2.16/22 36} 45. Rc5
{+3.50/32 34} Rb5 {-2.14/22 83} 46. Rxb5 {+3.96/33 31} Bxb5 {-2.73/25 62}
47. Rh5 {+66.07/30 41} Bf1 {-2.92/25 33} 48. Ra5 {+68.58/35 62} Ke6
{-2.85/24 66} 49. Rxa4 {+66.67/36 37} Kf5 {-9.30/24 30} 50. Ra1 {+93.95/36
57} Bh3 {-9.45/24 26} 51. Rg1 {+96.94/32 52} Kf4 {-9.45/25 29 Arena
Adjudication} 1-0


[/pgn]

[cdani]

Thanks for the tournament and the game!

[Guenther]

A great game from Andscacs!

I guess Texel weak move was 18. .. Bb7

[pgn]
[Event "B99y Top Engines"]
[Site "UTENTE-PC"]
[Date "2017.07.01"]
[Round "1"]
[White "Andscacs091"]
[Black "Texel64"]
[Result "1-0"]
[ECO "B99"]
[Opening "Sicilian"]
[TimeControl "1800+15"]
[Termination "adjudication"]
[PlyCount "102"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.
Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6
gxf6 15. gxf6 Bf8 16. Rg1 h5 17. a3 {+0.01/19 69} Qb6 {0.00/20 72} 18. Rg7
{+0.73/23 75} Bb7 {-0.07/19 89} 19. Bh3 {+1.63/24 76} b4 {-1.34/21 241} 20.
axb4 {+1.42/25 70} Qxb4 {-1.75/21 64} 21. Qg2 {+1.41/25 57} Rc8 {-1.90/20
152} 22. Bxe6 {+1.33/25 152} Nxe6 {-2.19/20 54} 23. Nxe6 {+1.57/24 65} Rxc3
{-2.39/20 65} 24. bxc3 {+1.75/26 117} Qxc3 {-2.16/20 54} 25. Nxf8 {+1.66/23
46} Rxf8 {-1.99/20 53} 26. Rg5 {+1.72/28 71} Qa1+ {-1.75/18 54} 27. Kd2
{+1.26/4 0} Qxf6 {-1.57/19 51} 28. Rxh5 {+1.76/26 49} Qd4+ {-1.61/17 48}
29. Ke1 {+1.93/25 70} Qb4+ {-1.58/18 49} 30. Kf2 {+1.85/28 50} Bxe4
{-1.42/18 48} 31. Qg7 {+1.71/27 96} f6 {-1.78/19 48} 32. Qc7 {+1.76/26 52}
d5 {-1.91/19 45} 33. Rh4 {+1.72/26 38} Rg8 {-1.73/20 52} 34. Qc6+ {+1.75/28
52} Ke7 {-1.38/20 45} 35. Qxd5 {+1.84/28 51} Qb6+ {-1.47/21 51} 36. Qd4
{+2.05/27 56} Qxd4+ {-1.57/21 41} 37. Rxd4 {+2.08/29 34} Bxc2 {-1.61/21 41}
38. Rc4 {+2.15/28 58} Bd3 {-1.63/21 41} 39. Rc6 {+2.44/28 90} Rb8 {-1.74/21
40} 40. Rh6 {+2.40/30 36} Rb1 {-1.87/21 39} 41. Ke3 {+2.97/28 32} Rb3
{-2.06/21 47} 42. Kd4 {+3.13/33 78} a5 {-2.17/20 45} 43. Rcxf6 {+3.34/31
69} a4 {-2.11/21 37} 44. Rc6 {+3.38/31 46} Kd7 {-2.16/22 36} 45. Rc5
{+3.50/32 34} Rb5 {-2.14/22 83} 46. Rxb5 {+3.96/33 31} Bxb5 {-2.73/25 62}
47. Rh5 {+66.07/30 41} Bf1 {-2.92/25 33} 48. Ra5 {+68.58/35 62} Ke6
{-2.85/24 66} 49. Rxa4 {+66.67/36 37} Kf5 {-9.30/24 30} 50. Ra1 {+93.95/36
57} Bh3 {-9.45/24 26} 51. Rg1 {+96.94/32 52} Kf4 {-9.45/25 29 Arena
Adjudication} 1-0


[/pgn]

What was the GUI? Texel depths look very strange especially for 4 cores and the given thinking times.

Edit:
First move for Andscacs also has a much too low depth - I get at least depth 23 on a very old quadcore in 60 seconds here with 4 cores.

Guenther

[Rodolfo Leoni]

Thanks for the tournament and the game!

Hi Daniel,
I think that's an interesting position. It's funny to see engines playing tactics.

What was the GUI? Texel depths look very strange especially for 4 cores and the given thinking times.

Edit:
First move for Andscacs also has a much too low depth - I get at least depth 23 on a very old quadcore in 60 seconds here with 4 cores.

Guenther

Hi Guenther,

I'm using Arena 3.5.1. I don't know why Texel search is so shallow. The UCI common CPUs is set to 4.

About Andscacs, I noticed many fails low/up on first move. That means engine had to perform several full searches. I guess there could be some randomnesses on search with different hardwares. Often, on the same hardware too!

Rodolfo

[Rodolfo Leoni]

Strelka- Arasan

Same "blunder" by Arasan (18. .. Bb7), different handling. But Andscacs line was better, I guess.

[pgn][Event "B99y Top Engines"]
[Site "UTENTE-PC"]
[Date "2017.07.01"]
[Round "1"]
[White "Strelka_5.5x64"]
[Black "Arasanx-64-popcnt"]
[Result "1-0"]
[ECO "B99"]
[Opening "Sicilian"]
[TimeControl "1800+15"]
[Termination "normal"]
[PlyCount "102"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.
Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6
gxf6 15. gxf6 Bf8 16. Rg1 h5 17. a3 {+0.61/18 101} Qb6 18. Rg7 {+0.67/17
46} Bb7 {-0.83/25 72} 19. Bh3 {+0.87/17 42} b4 {-1.72/26 70} 20. axb4
{+0.85/15 0} Qxb4 {-1.31/27 69} 21. Nd5 {+2.45/17 76} Bxd5 {-0.18/29 68}
22. exd5 {+2.43/15 0} Rb8 {-0.97/29 65} 23. b3 {+2.70/15 1} e5 {-0.77/29
64} 24. Nc6 {+2.68/19 64} Nxb3+ {-0.86/32 63} 25. cxb3 {+2.66/17 0} Qa3+
{-0.96/32 61} 26. Kd2 {+2.64/17 0} Rxb3 {-1.25/32 60} 27. Bd7+ {+1.98/19
87} Kxd7 {-1.39/31 59} 28. Qf5+ {+1.96/18 0} Kc7 {-1.02/30 57} 29. Rxf7+
{+2.95/19 103} Kb6 {-1.32/30 56} 30. Qf2+ {+2.65/17 0} Qc5 {-1.49/32 193}
31. Qxc5+ {+2.63/17 0} Kxc5 {-1.33/32 50} 32. Nd8 {+2.30/23 174} Bh6+
{-1.43/30 49} 33. Kc2 {+4.14/20 23} Rf3 {-1.25/31 48} 34. Rc7+ {+4.67/20
54} Kb6 {-1.98/31 47} 35. Rb7+ {+4.65/18 0} Kc5 {-2.18/34 162} 36. Ne6+
{+5.18/21 38} Kc4 {-2.19/33 149} 37. Rc7+ {+4.62/19 0} Kb4 {-2.33/30 113}
38. Rb1+ {+5.59/21 50} Ka3 {-2.29/29 35} 39. Rc3+ {+5.57/19 0} Rxc3+
{-2.64/30 34} 40. Kxc3 {+5.55/19 0} Rc8+ {-2.76/30 34} 41. Kd3 {+5.53/18 0}
a5 {-2.74/29 33} 42. f7 {+5.75/21 39} a4 {-3.06/29 33} 43. Rb6 {+5.73/20 0}
Rc1 {-3.04/27 32} 44. Rxd6 {+6.04/22 123} Kb4 {-3.18/29 91} 45. Ke4
{+6.38/22 95} Rf1 {-3.49/27 30} 46. Rb6+ {+6.36/20 0} Kc3 {-3.67/27 29} 47.
Rb7 {+7.99/19 39} a3 {-4.04/27 29} 48. Ra7 {+7.97/18 0} a2 {-4.13/27 28}
49. d6 {+8.15/19 47} Rxf7 {-4.23/26 28} 50. Rxa2 {+8.13/18 0} Bd2 {-4.16/27
28} 51. Kxe5 {+9.85/22 125} Bc1 {-4.14/25 27 Black resigns} 1-0

[/pgn]

AsmFishW-Stockfish 8 in progress... W is better so far.

[Rodolfo Leoni]

.....I noticed many fails low/up .....

Rodolfo

I wanted to say... fails low/high

When lunch time I think with my stomach!

[Rodolfo Leoni]

I just can't understand where's Stockfish weak move. Maybe, castling was premature.

[pgn][Event "B99y Top Engines"]
[Site "UTENTE-PC"]
[Date "2017.07.01"]
[Round "1"]
[White "AsmFishW_2017-05-22_popcnt"]
[Black "Stockfish_8_x64_popcnt"]
[Result "1-0"]
[ECO "B99"]
[Opening "Sicilian"]
[TimeControl "1800+15"]
[Termination "normal"]
[PlyCount "118"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.
Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6
gxf6 15. gxf6 Bf8 16. Rg1 h5 17. a3 {0.00/29 96} Qb6 {-0.12/28 132} 18. Kb1
{+0.31/31 128} b4 {0.00/25 16} 19. axb4 {+0.16/28 12} Qxb4 {-0.42/28 116}
20. e5 {+0.18/28 88} Bb7 {-0.28/27 78} 21. Qf2 {+0.43/26 65} O-O-O
{-0.47/30 118} 22. Nf3 {+0.38/25 16} Kb8 {-0.57/29 120} 23. Be2 {+0.35/28
86} d5 {-0.52/28 88} 24. Rg3 {+0.16/29 145} Bc6 {-0.47/28 70} 25. Ng5
{+0.45/27 104} Rd7 {-0.49/28 83} 26. Na2 {+0.68/28 41} Qa5 {-0.50/30 51}
27. Ra3 {+0.46/32 94} Ne4 {-0.43/27 10} 28. Rxa5 {+0.51/30 11} Nxf2
{-0.50/32 99} 29. Rd4 {+0.57/33 54} Ng4 {-0.56/28 10} 30. Nf3 {+0.22/28 40}
Rg8 {-0.43/32 31} 31. h3 {+0.83/29 102} Nf2 {-0.70/30 144} 32. Nb4
{+0.76/34 76} Bxb4 {-0.82/28 10} 33. Rxb4+ {+1.04/26 11} Rb7 {-0.69/31 34}
34. Rh4 {+1.10/33 123} Ne4 {-0.60/28 35} 35. Bxa6 {+1.34/29 18} Ra7
{-1.08/31 143} 36. Ra2 {+0.89/33 109} Rg3 {-0.86/31 33} 37. Be2 {+1.29/27
41} Rxf3 {-1.00/32 22} 38. Bxf3 {+1.35/36 57} Nd2+ {-0.83/34 30} 39. Kc1
{+1.54/36 26} Nxf3 {-1.18/33 12} 40. Rxa7 {+1.58/36 9} Kxa7 {-1.46/38 84}
41. Rxh5 {+1.60/39 38} d4 {-1.53/37 68} 42. h4 {+1.64/36 9} Be4 {-1.71/32
18} 43. Rh8 {+1.76/38 88} Nxe5 {-1.72/35 74} 44. h5 {+1.79/32 7} Ng4
{-1.65/33 55} 45. Rf8 {+2.05/33 28} Nh6 {-1.76/33 64} 46. Rd8 {+1.97/29 8}
e5 {-2.17/36 279} 47. Re8 {+2.64/33 31} Kb6 {-2.56/36 53} 48. Rxe5
{+2.66/29 7} Bh7 {-2.76/33 71} 49. Rd5 {+3.18/32 27} d3 {-3.33/34 49} 50.
Rd8 {+3.18/33 13} Bf5 {-3.29/33 32} 51. cxd3 {+3.63/34 37} Kc7 {-3.52/29 7}
52. Rh8 {+3.70/30 7} Ng4 {-3.46/34 31} 53. Kd2 {+3.98/32 32} Nxf6 {-3.47/28
27} 54. Kc3 {+4.05/28 8} Bg4 {-3.85/30 42} 55. h6 {+4.42/34 51} Bf5
{-4.14/33 34} 56. Ra8 {+4.48/30 8} Kb6 {-4.14/33 21} 57. Ra1 {+4.72/32 36}
Bg6 {-4.14/28 23} 58. Rf1 {+5.04/32 27} Nh7 {-4.52/31 36} 59. Kc4 {+5.28/31
31} Bh5 {-4.73/34 29 Black resigns} 1-0


[/pgn]

AsmfishW node rate was almost 30% higher than Stockfish one. Is it normal? I didn't think assembly was so faster than C++.

[Rodolfo Leoni]

Results so far:

Andscacs091 - Texel64 1-0
Strelka_5.5x64 - Arasanx-64-popcnt 1-0
AsmFishW_2017-05-22_popcnt - Stockfish_8_x64_popcnt 1-0
Stockfish_17062902_x64_modern - BrainFish_170622_x64_modern 1/2-1/2
Critter_1.6a_64bit - Seagull 0-1
Pedone_1.6_win64 - Equinox 3.30-x64 1-0

Pedone played a nice, out of theory game vs. Equinox

[pgn][Event "B99y Top Engines"]
[Site "UTENTE-PC"]
[Date "2017.07.01"]
[Round "1"]
[White "Pedone_win64"]
[Black "Equinox 3.30-x64"]
[Result "1-0"]
[ECO "B99"]
[Opening "Sicilian"]

[TimeControl "1800+15"]
[Termination "normal"]
[PlyCount "68"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.
Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6
gxf6 15. gxf6 Bf8 16. Rg1 h5 17. a3 {+0.26/22 81} Rb8 {-0.25/22 90} 18. Re1
{+0.54/26 118} Bd7 {-0.15/21 32} 19. Nd5 {+0.84/26 108} Qc8 {-1.25/21 211}
20. Rg7 {+1.15/25 166} e5 {-1.39/22 104} 21. Nf5 {+1.32/26 69} Bxf5
{-1.39/21 5} 22. exf5 {+1.36/26 62} Nd7 {-1.62/22 126} 23. Kb1 {+1.80/26
50} Qd8 {-2.10/24 444} 24. Bh3 {+1.96/26 87} Nb6 {-2.18/22 93} 25. Qg2
{+2.18/30 64} Nxd5 {-2.94/22 114} 26. Qxd5 {+3.20/30 80} Qxf6 {-2.91/22 18}
27. Qc6+ {+3.20/29 68} Kd8 {-2.91/21 0} 28. Rd1 {+3.10/29 52} h4 {-3.07/23
69} 29. Qxa6 {+3.01/29 54} e4 {-3.32/24 101} 30. Qc6 {+4.54/30 47} e3
{-4.97/22 50} 31. Rg4 {+4.66/32 36} e2 {-4.97/21 1} 32. Re1 {+5.14/33 119}
Qe7 {-4.97/23 43} 33. Re4 {+5.14/33 39} Rc8 {-4.97/22} 34. Qxc8+ {+5.44/32
63} Kxc8 {-5.40/23 18 Black resigns} 1-0

[/pgn]

[Rodolfo Leoni]

Double sac by Fire, McBrain gave a Rook back to avoid to be ... Fired!

[pgn][Event "B99y Top Engines"]
[Site "UTENTE-PC"]
[Date "2017.07.01"]
[Round "1"]
[White "Fire 5 x64"]
[Black "McBrain_2017_v25_x64_modern"]
[Result "1/2-1/2"]
[BlackElo "3000"]
[ECO "B99"]
[Opening "Sicilian"]
[Time "17:59:59"]
[WhiteElo "3000"]
[TimeControl "1800+15"]
[Termination "normal"]
[PlyCount "108"]
[WhiteType "program"]
[BlackType "program"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.
Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6
gxf6 15. gxf6 Bf8 16. Rg1 h5 17. a3 {0.00/18 175} Qb6 18. Rg7 {0.00/21 84}
Rb8 {0.00/26 62} 19. b4 {0.00/22 153} Nd7 {0.00/28 69} 20. Be2 {0.00/23 32}
Ne5 {0.00/31 112} 21. Qg3 {0.00/23 57} Qd8 {-0.08/31 225} 22. Qg5 {0.00/25
61} Bxg7 {-0.62/32 125} 23. Qxg7 {+0.41/25 66} Rf8 {-0.78/27 11} 24. Nf3
{+0.48/25 65} Nxf3 {-0.36/29 45} 25. Bxf3 {+0.38/26 47} Qc7 {-0.46/36 115}
26. Rd3 {+0.43/27 66} h4 {-0.54/32 31} 27. Nd5 {+0.39/27 62} exd5 {-0.39/33
30} 28. exd5 {+0.41/27 63} Qa7 {-0.45/37 109} 29. Kd2 {+0.39/26 48} Qf2+
{-0.68/29 9} 30. Be2 {+0.50/26 47} Qf4+ {-0.63/36 63} 31. Re3+ {+0.51/26
58} Kd7 {-0.34/36 251} 32. Qxf8 {+0.48/26 45} Kc7 {-0.34/28 10} 33. Qxf7+
{+0.42/25 53} Bd7 {-0.25/32 41} 34. Qh7 {+0.37/26 73} Rf8 {-0.29/35 96} 35.
Qd3 {+0.60/24 76} Rxf6 {-0.21/30 62} 36. Kc3 {+0.44/26 85} Rf7 {-0.57/35
83} 37. Kb2 {+0.38/25 39} Qg5 {-0.37/30 27} 38. Qd4 {+0.39/25 44} Kb7
{-0.31/33 62} 39. Re4 {+0.38/27 42} Bf5 {-0.28/33 38} 40. Rf4 {+0.19/25 58}
Rc7 {-0.08/29 27} 41. c3 {+0.14/26 48} Re7 {-0.03/29 9} 42. Bf3 {0.00/25
51} Qg6 {-0.08/32 76} 43. Qf2 {+0.36/23 35} h3 {0.00/35 34} 44. Bd1
{+0.23/25 39} Bd7 {0.00/36 11} 45. Qh4 {+0.10/26 76} Re8 {0.00/39 36} 46.
Rf2 {+0.10/26 43} Qd3 {0.00/41 295} 47. Bc2 {0.00/28 45} Re2 {0.00/33 39}
48. Rxe2 {0.00/28 34} Qxe2 {0.00/35 13} 49. Qg3 {0.00/31 35} Bf5 {0.00/37
25} 50. Qg7+ {0.00/34 22} Kb6 {0.00/39 17} 51. Qg1+ {0.00/37 21} Kc7
{0.00/39 22} 52. Qg7+ {0.00/35 21} Kb6 {0.00/40 35} 53. Qg1+ {0.00/39 36}
Kb7 {0.00/42 95} 54. Qg7+ {0.00/40 38} Kb6 {0.00/42 22 3-fold repetition}
1/2-1/2

[/pgn]