Scratch Chess Engine - Game of Kings

ArnoHu

Samueldora wrote:
Here's the one and only match between Bonsai (green) and Game of Kings (medium) I played recently, using the Phosphorus player. Bonsai had white and won in 28 moves.

1.c4 e5 2.Nc3 Nf6 3.Nf3 Bd6 4.d4 e4 5.Ng5 Bb4 6.Bf4 O-O 7.a3 Bxc3+ 8.bxc3 h6 9.Nh3 Nc6 10.d5 Ne7 11.Rb1 c6 12.d6 Nf5 13.Qc2 a5 14.e3 Re8 15.a4 g5 16.Bg3 Nxg3 17.hxg3 Re6 18.Qd1 Qf8 19.c5 Nd5 20.Qc2 Qd8 21.Bc4 g4 22.Nf4 Nxf4 23.gxf4 Re8 24.Rxh6 Kg7 25.Rh5 f6 26.Qd1 Rb8 27.Qxg4+ Kf8 28.Qg8#

Bonsai (green) - GoK (medium)

If wonder, if there's some yet unknown AI in those engines or elsewhere which detects who's the tester and produces a result he likes.

On Medium and Green they are pretty equal in playing strength - and interestingly also in think time, at least on Sulfurous. I once played 3 games in a row, it was one win each and one draw. I posted that in the comments some weeks ago as far as I remember. Also I have experimented quite a bit lately with search depth on Medium (for now I traded playing strength for speed on Medium, vice versa to Difficult), so depending when one played, the result might have looked differently.

Last edited by ArnoHu (Sept. 15, 2018 21:09:28)

ArnoHu

At the moment one of the most promising enhancements for GoK would be bitboards (https://en.wikipedia.org/wiki/Bitboard). There are no bitwise operations in Scratch, but I had the idea to lookup eight times from a precalculated 256x256 = 64k table for every per-byte bitwise operation, to get 64bit operations emulated at good speed. That would make the engine so much faster so we could extend search depth significantly.

Most of all, move generation would benefit from bitboards, this is what currently eats up big chunks of runtime. That basically also means ripping the engine's inner workings apart and assembling them again afterwards, something for which I currently don't have the time. But let's see what the future will bring.

ArnoHu

After we had several Scratch Chess Engines play against Leela Chess Zero some weeks ago, lets do another run, and this time against Stockfish:

Game #1: Game of Kings Level Difficult (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Game of Kings wins in 82 moves, https://lichess.org/ps3kSL2B
Game #2: Bonsai Blue Belt (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Stockfish wins in 42 moves, https://lichess.org/IL09gSEZ
Game #3: Stockfish Level 5 (white) vs. The Turk (Sulfurous runtime, black): Stockfish wins in 16 moves, https://lichess.org/Hx6ncmyG
Game #4: Archimedes Chess (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Stockfish wins in 15 moves, https://lichess.org/5bCaj6qJ
Game #5: Stockfish Level 5 (white) vs. Midecash Chess (black): Stockfish wins in 8 moves, https://lichess.org/87hJdptk

Last edited by ArnoHu (Sept. 16, 2018 20:00:06)

ahmetlii

ArnoHu wrote:
After we had several Scratch Chess Engines play against Leela Chess Zero some weeks ago, lets do another run, and this time against Stockfish:

Game #1: Game of Kings Level Difficult (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Game of Kings wins in 82 moves, https://lichess.org/ps3kSL2B
Game #2: Bonsai Blue Belt (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Stockfish wins in 42 moves, https://lichess.org/IL09gSEZ
Game #3: Stockfish Level 5 (white) vs. The Turk (Sulfurous runtime, black): Stockfish wins in 16 moves, https://lichess.org/Hx6ncmyG
Game #4: Archimedes Chess (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Stockfish wins in 15 moves, https://lichess.org/5bCaj6qJ
Game #5: Stockfish Level 5 (white) vs. Midecash Chess (black): Stockfish wins in 8 moves, https://lichess.org/87hJdptk

WOW! I'm a lichess user.But if this engine in Scratch,this engine will awesome.

Last edited by ahmetlii (Sept. 19, 2018 08:34:24)

ArnoHu

ahmetlii wrote:
ArnoHu wrote:
After we had several Scratch Chess Engines play against Leela Chess Zero some weeks ago, lets do another run, and this time against Stockfish:

Game #1: Game of Kings Level Difficult (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Game of Kings wins in 82 moves, https://lichess.org/ps3kSL2B
Game #2: Bonsai Blue Belt (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Stockfish wins in 42 moves, https://lichess.org/IL09gSEZ
Game #3: Stockfish Level 5 (white) vs. The Turk (Sulfurous runtime, black): Stockfish wins in 16 moves, https://lichess.org/Hx6ncmyG
Game #4: Archimedes Chess (Sulfurous runtime, white) vs. Stockfish Level 5 (black): Stockfish wins in 15 moves, https://lichess.org/5bCaj6qJ
Game #5: Stockfish Level 5 (white) vs. Midecash Chess (black): Stockfish wins in 8 moves, https://lichess.org/87hJdptk

WOW! I'm a lichess user.But if this engine in Scratch,this engine will awesome.

Thanks, it actually plays best on the fast Sulfurous engine, as it can increase search depth. That's at https://sulfurous.aau.at/html/app.html?id=148769358.

ArnoHu

Round two of Scratch engines vs. Stockfish, this time level 6:

Game #1: Game of Kings Level Difficult (Sulfurous runtime, white) vs. Stockfish Level 6 (black): Game of Kings wins in 55 moves, https://lichess.org/1qUqaHgV
Game #2: Game of Kings Level Difficult (Sulfurous runtime, white) vs. Stockfish Level 6 (black): Game of Kings wins in 65 moves, https://lichess.org/n8220pgY

Game #3: Bonsai Blue Belt (Sulfurous runtime, white) vs. Stockfish Level 6 (black):
Game #4: Bonsai Blue Belt (Sulfurous runtime, white) vs. Stockfish Level 6 (black):

Game #5: Stockfish Level 6 (white) vs. The Turk (Sulfurous runtime, black):
Game #6: Stockfish Level 6 (white) vs. The Turk (Sulfurous runtime, black):

Game #7: Archimedes Chess (Sulfurous runtime, white) vs. Stockfish Level 6 (black):
Game #8: Archimedes Chess (Sulfurous runtime, white) vs. Stockfish Level 6 (black):

Game #9: Stockfish Level 6 (white) vs. Midecash Chess (black):
Game #10: Stockfish Level 6 (white) vs. Midecash Chess (black):

Last edited by ArnoHu (Oct. 22, 2018 16:01:03)

ArnoHu

OK, so the GoK development version at https://scratch.mit.edu/projects/208477599/ now contains full iterative deepening prototype on level “Difficult” (the main version only does that up to ply3). Initial tests look promising, a lot better than when I tried that once a couple of months ago. Even in the worst case scenario (complex board on Scratch 2.0 and slow machine), it is faster. Currently has a guaranteed thinktime of 40-60 seconds. On endgame it went to ply10 and saw checkmate in 8.

Last edited by ArnoHu (Oct. 8, 2018 10:27:20)

ArnoHu

Here is a fun game that GoK (white) lost against Bonsai - all the latest improvements are nice, and at the point GoK made its fatal mistake it was working on ply9 - but ply14 would have been necessary to see that Bonsai secured its pawn promotion here. https://lichess.org/6uq1zRMV#68

ArnoHu

Rematch, GoK Easy (white, 5 secs think time, Sulfurous) vs. Bonsai Green: https://lichess.org/FCfQSyNZ

ArnoHu

Game of Kings Chess (white, level Easy, Sulfurous) plays three test games vs. Midecah Chess, wins in 3, 20 and 7 moves:

1. e2e4 f7f6 2. Nb1c3 g7g5 3. Qd1h5

1. e2e4 Ng8h6 2. Nb1c3 c7c6 3. d2d4 Nh6g8 4. Bc1f4 Nb8a6 5. Bf1xa6 b7xa6 6. Ng1f3 e7e6 7. O-O h7h5 8. a2a3 Ng8h6 9. Nf3e5 d7d6 10. Ne5xc6 Qd8b6 11. Nc6b4 Qb6xb4 12. a3xb4 h5h4 13. b4b5 a6xb5 14. Nc3xb5 a7a5 15. Nb5c7 Ke8d7 16. Nc7xa8 Kd7c6 17. Ra1xa5 f7f6 18. Ra5a7 g7g6 19. c2c4 Nh6g4 20. Qd1a4

1. e2e4 f7f6 2. Nb1c3 g7g6 3. Bf1b5 c7c5 4. Ng1f3 Nb8a6 5. O-O h7h6 6. Nf3h4 g6g5 7. Qd1h5

Last edited by ArnoHu (Oct. 21, 2018 02:21:54)

ArnoHu

Game of Kings Chess (level Easy, Sulfurous) plays three test games vs. Bonsai Chess (green belt), wins in 46, 93 and 60 moves:

1. c2c4 e7e5 2. Nb1c3 Ng8f6 3. Ng1f3 Nb8c6 4. e2e4 Bf8b4 5. d2d3 Bb4xc3 6. b2xc3 O-O 7. Qd1c2 d7d6 8. Ra1b1 b7b6 9. h2h3 a7a5 10. d3d4 Bc8b7 11. d4d5 Nc6a7 12. c4c5 Ra8c8 13. c5c6 Na7xc6 14. d5xc6 Bb7xc6 15. Bf1d3 a5a4 16. c3c4 h7h6 17. Bc1b2 a4a3 18. Bb2xa3 Rc8a8 19. Ba3b4 Bc6a4 20. Qc2c1 Ba4c6 21. Nf3xe5 d6xe5 22. Bb4xf8 Qd8xd3 23. Bf8e7 Qd3xe4 24. Ke1d1 Qe4xg2 25. Rh1e1 Bc6f3 26. Kd1c2 Bf3e4 27. Kc2b2 Qg2xf2 28. Kb2b3 Qf2xa2 29. Kb3b4 Ra8a4 30. Kb4b5 Be4xb1 31. Be7xf6 Qa2b3 32. Kb5c6 Ra4xc4 33. Qc1xc4 Qb3xc4 34. Kc6b7 g7xf6 35. Re1g1 Kg8f8 36. Rg1g4 Bb1e4 37. Kb7a7 Qc4c6 38. Rg4xe4 Qc6xe4 39. Ka7b8 Qe4c4 40. Kb8b7 Kf8e7 41. Kb7c8 Ke7d6 42. Kc8b7 Qc4h4 43. Kb7a6 Qh4xh3 44. Ka6b7 Qh3a3 45. Kb7b8 Kd6c6 46. Kb8c8 Qa3f8

1. e2e4 d7d6 2. Nb1c3 Nb8c6 3. Bf1c4 Nc6e5 4. Bc4b5 Bc8d7 5. Bb5xd7 Qd8xd7 6. d2d4 Ne5c4 7. b2b3 Nc4b6 8. Ng1f3 Qd7c6 9. Bc1b2 Ng8f6 10. d4d5 Qc6c5 11. Rh1f1 O-O-O 12. Qd1d2 Qc5b4 13. a2a3 Qb4c5 14. b3b4 Qc5c4 15. Qd2d3 Qc4xd3 16. c2xd3 h7h6 17. d3d4 g7g5 18. a3a4 Bf8g7 19. a4a5 Nb6c4 20. O-O-O Kc8b8 21. e4e5 Nc4xb2 22. Kc1xb2 Nf6d7 23. e5e6 f7xe6 24. d5xe6 g5g4 25. Nf3d2 Nd7f8 26. d4d5 Nf8g6 27. Rd1c1 Ng6f4 28. Kb2b1 Nf4d3 29. Rc1c2 Nd3xb4 30. Rc2c1 Bg7xc3 31. Rc1xc3 Nb4xd5 32. Rc3c4 Nd5f6 33. Rf1d1 d6d5 34. Rc4b4 Rd8d6 35. Rd1e1 Rd6a6 36. Rb4b5 Ra6c6 37. Nd2b3 Nf6e4 38. Kb1a1 Rh8d8 39. Rb5xd5 Rd8xd5 40. Re1xe4 h6h5 41. Ka1b1 b7b5 42. a5b6 c7xb6 43. Kb1b2 Kb8c7 44. Re4a4 Kc7d6 45. Ra4xa7 Kd6xe6 46. Kb2b1 h5h4 47. Ra7a4 Rd5d1 48. Kb1b2 Ke6e5 49. Ra4xg4 Rd1f1 50. f2f3 Rf1f2 51. Kb2a3 Rc6c8 52. Rg4xh4 Rf2xg2 53. Rh4e4 Ke5d5 54. Re4d4 Kd5e6 55. Rd4d2 Rg2xd2 56. Nb3xd2 Rc8c2 57. Nd2e4 Rc2xh2 58. Ka3b4 Ke6e5 59. Kb4b5 Ke5f4 60. Kb5xb6 Rh2b2 61. Kb6c5 Rb2b8 62. Kc5d5 Kf4xf3 63. Ne4d2 Kf3e2 64. Nd2e4 Rb8d8 65. Kd5e6 Rd8d3 66. Ke6f5 Rd3d4 67. Kf5e5 Rd4c4 68. Ne4g5 Rc4c5 69. Ke5f4 Ke2d3 70. Ng5e6 Rc5d5 71. Kf4f3 Rd5e5 72. Ne6f4 Kd3d2 73. Nf4g6 Re5e6 74. Ng6f4 Re6e3 75. Kf3f2 e7e6 76. Nf4h5 Re3e4 77. Kf2f3 Re4e5 78. Nh5f4 Re5e1 79. Nf4h5 Re1f1 80. Kf3e4 Kd2c3 81. Nh5f4 Rf1e1 82. Ke4f3 e6e5 83. Nf4d5 Kc3d4 84. Kf3f2 Re1c1 85. Nd5f6 Rc1c6 86. Nf6g4 e5e4 87. Kf2g3 e4e3 88. Kg3f3 Rc6c8 89. Kf3e2 Rc8f8 90. Ke2d1 Rf8f4 91. Ng4h6 Kd4d3 92. Kd1e1 e3e2 93. Nh6g8 Rf4f1

1. Ng1f3 d7d6 2. e2e4 Ng8f6 3. Bf1d3 Nb8c6 4. O-O e7e5 5. b2b3 Nc6d4 6. Nf3xd4 e5xd4 7. h2h3 a7a6 8. Bc1b2 c7c5 9. c2c3 Qd8b6 10. c3xd4 c5xd4 11. a2a4 h7h6 12. a4a5 Qb6c6 13. Rf1e1 Qc6c5 14. Ra1a4 Qc5c7 15. Bb2xd4 Bc8d7 16. Bd4b6 Qc7b8 17. Ra4c4 Bd7b5 18. Rc4c3 Bb5xd3 19. Rc3xd3 Bf8e7 20. Nb1c3 O-O 21. b3b4 Rf8e8 22. Nc3d5 Nf6xd5 23. Rd3xd5 Be7d8 24. Bb6d4 b7b5 25. d2d3 Qb8c7 26. Qd1g4 Bd8g5 27. h3h4 f7f6 28. h4xg5 f6xg5 29. Rd5f5 Ra8c8 30. Qg4h5 Re8e7 31. Qh5g6 Re7e8 32. Kg1f1 Rc8b8 33. Bd4f6 Re8e6 34. Rf5f3 Rb8c8 35. Re1d1 g5g4 36. Qg6xg4 Rc8e8 37. Qg4g6 Re8c8 38. Rf3g3 d6d5 39. Qg6xg7 Qc7xg7 40. Rg3xg7 Kg8f8 41. Rg7h7 Re6xf6 42. Rh7h8 Kf8e7 43. Rh8xc8 d5xe4 44. d3xe4 Rf6f8 45. Rc8xf8 Ke7xf8 46. Rd1d6 h6h5 47. Rd6xa6 Kf8f7 48. Ra6h6 h5h4 49. Rh6xh4 Kf7g6 50. a5a6 Kg6g5 51. g2g3 Kg5f6 52. a6a7 Kf6e5 53. a7a8 Ke5d4 54. Qa8d5 Kd4c3 55. e4e5 Kc3b2 56. Kf1e2 Kb2a3 57. e5e6 Ka3b2 58. Ke2d3 Kb2a3 59. Kd3c3 Ka3a4 60. Qd5a2

ArnoHu

ArnoHu wrote:
Game of Kings Chess (level Easy, Sulfurous) plays three test games vs. Bonsai Chess (green belt), wins in 46, 93 and 60 moves:

1. c2c4 e7e5 2. Nb1c3 Ng8f6 3. Ng1f3 Nb8c6 4. e2e4 Bf8b4 5. d2d3 Bb4xc3 6. b2xc3 O-O 7. Qd1c2 d7d6 8. Ra1b1 b7b6 9. h2h3 a7a5 10. d3d4 Bc8b7 11. d4d5 Nc6a7 12. c4c5 Ra8c8 13. c5c6 Na7xc6 14. d5xc6 Bb7xc6 15. Bf1d3 a5a4 16. c3c4 h7h6 17. Bc1b2 a4a3 18. Bb2xa3 Rc8a8 19. Ba3b4 Bc6a4 20. Qc2c1 Ba4c6 21. Nf3xe5 d6xe5 22. Bb4xf8 Qd8xd3 23. Bf8e7 Qd3xe4 24. Ke1d1 Qe4xg2 25. Rh1e1 Bc6f3 26. Kd1c2 Bf3e4 27. Kc2b2 Qg2xf2 28. Kb2b3 Qf2xa2 29. Kb3b4 Ra8a4 30. Kb4b5 Be4xb1 31. Be7xf6 Qa2b3 32. Kb5c6 Ra4xc4 33. Qc1xc4 Qb3xc4 34. Kc6b7 g7xf6 35. Re1g1 Kg8f8 36. Rg1g4 Bb1e4 37. Kb7a7 Qc4c6 38. Rg4xe4 Qc6xe4 39. Ka7b8 Qe4c4 40. Kb8b7 Kf8e7 41. Kb7c8 Ke7d6 42. Kc8b7 Qc4h4 43. Kb7a6 Qh4xh3 44. Ka6b7 Qh3a3 45. Kb7b8 Kd6c6 46. Kb8c8 Qa3f8

1. e2e4 d7d6 2. Nb1c3 Nb8c6 3. Bf1c4 Nc6e5 4. Bc4b5 Bc8d7 5. Bb5xd7 Qd8xd7 6. d2d4 Ne5c4 7. b2b3 Nc4b6 8. Ng1f3 Qd7c6 9. Bc1b2 Ng8f6 10. d4d5 Qc6c5 11. Rh1f1 O-O-O 12. Qd1d2 Qc5b4 13. a2a3 Qb4c5 14. b3b4 Qc5c4 15. Qd2d3 Qc4xd3 16. c2xd3 h7h6 17. d3d4 g7g5 18. a3a4 Bf8g7 19. a4a5 Nb6c4 20. O-O-O Kc8b8 21. e4e5 Nc4xb2 22. Kc1xb2 Nf6d7 23. e5e6 f7xe6 24. d5xe6 g5g4 25. Nf3d2 Nd7f8 26. d4d5 Nf8g6 27. Rd1c1 Ng6f4 28. Kb2b1 Nf4d3 29. Rc1c2 Nd3xb4 30. Rc2c1 Bg7xc3 31. Rc1xc3 Nb4xd5 32. Rc3c4 Nd5f6 33. Rf1d1 d6d5 34. Rc4b4 Rd8d6 35. Rd1e1 Rd6a6 36. Rb4b5 Ra6c6 37. Nd2b3 Nf6e4 38. Kb1a1 Rh8d8 39. Rb5xd5 Rd8xd5 40. Re1xe4 h6h5 41. Ka1b1 b7b5 42. a5b6 c7xb6 43. Kb1b2 Kb8c7 44. Re4a4 Kc7d6 45. Ra4xa7 Kd6xe6 46. Kb2b1 h5h4 47. Ra7a4 Rd5d1 48. Kb1b2 Ke6e5 49. Ra4xg4 Rd1f1 50. f2f3 Rf1f2 51. Kb2a3 Rc6c8 52. Rg4xh4 Rf2xg2 53. Rh4e4 Ke5d5 54. Re4d4 Kd5e6 55. Rd4d2 Rg2xd2 56. Nb3xd2 Rc8c2 57. Nd2e4 Rc2xh2 58. Ka3b4 Ke6e5 59. Kb4b5 Ke5f4 60. Kb5xb6 Rh2b2 61. Kb6c5 Rb2b8 62. Kc5d5 Kf4xf3 63. Ne4d2 Kf3e2 64. Nd2e4 Rb8d8 65. Kd5e6 Rd8d3 66. Ke6f5 Rd3d4 67. Kf5e5 Rd4c4 68. Ne4g5 Rc4c5 69. Ke5f4 Ke2d3 70. Ng5e6 Rc5d5 71. Kf4f3 Rd5e5 72. Ne6f4 Kd3d2 73. Nf4g6 Re5e6 74. Ng6f4 Re6e3 75. Kf3f2 e7e6 76. Nf4h5 Re3e4 77. Kf2f3 Re4e5 78. Nh5f4 Re5e1 79. Nf4h5 Re1f1 80. Kf3e4 Kd2c3 81. Nh5f4 Rf1e1 82. Ke4f3 e6e5 83. Nf4d5 Kc3d4 84. Kf3f2 Re1c1 85. Nd5f6 Rc1c6 86. Nf6g4 e5e4 87. Kf2g3 e4e3 88. Kg3f3 Rc6c8 89. Kf3e2 Rc8f8 90. Ke2d1 Rf8f4 91. Ng4h6 Kd4d3 92. Kd1e1 e3e2 93. Nh6g8 Rf4f1

1. Ng1f3 d7d6 2. e2e4 Ng8f6 3. Bf1d3 Nb8c6 4. O-O e7e5 5. b2b3 Nc6d4 6. Nf3xd4 e5xd4 7. h2h3 a7a6 8. Bc1b2 c7c5 9. c2c3 Qd8b6 10. c3xd4 c5xd4 11. a2a4 h7h6 12. a4a5 Qb6c6 13. Rf1e1 Qc6c5 14Your text to link here…. Ra1a4 Qc5c7 15. Bb2xd4 Bc8d7 16. Bd4b6 Qc7b8 17. Ra4c4 Bd7b5 18. Rc4c3 Bb5xd3 19. Rc3xd3 Bf8e7 20. Nb1c3 O-O 21. b3b4 Rf8e8 22. Nc3d5 Nf6xd5 23. Rd3xd5 Be7d8 24. Bb6d4 b7b5 25. d2d3 Qb8c7 26. Qd1g4 Bd8g5 27. h3h4 f7f6 28. h4xg5 f6xg5 29. Rd5f5 Ra8c8 30. Qg4h5 Re8e7 31. Qh5g6 Re7e8 32. Kg1f1 Rc8b8 33. Bd4f6 Re8e6 34. Rf5f3 Rb8c8 35. Re1d1 g5g4 36. Qg6xg4 Rc8e8 37. Qg4g6 Re8c8 38. Rf3g3 d6d5 39. Qg6xg7 Qc7xg7 40. Rg3xg7 Kg8f8 41. Rg7h7 Re6xf6 42. Rh7h8 Kf8e7 43. Rh8xc8 d5xe4 44. d3xe4 Rf6f8 45. Rc8xf8 Ke7xf8 46. Rd1d6 h6h5 47. Rd6xa6 Kf8f7 48. Ra6h6 h5h4 49. Rh6xh4 Kf7g6 50. a5a6 Kg6g5 51. g2g3 Kg5f6 52. a6a7 Kf6e5 53. a7a8 Ke5d4 54. Qa8d5 Kd4c3 55. e4e5 Kc3b2 56. Kf1e2 Kb2a3 57. e5e6 Ka3b2 58. Ke2d3 Kb2a3 59. Kd3c3 Ka3a4 60. Qd5a2

Game #4 ends in draw, crazy match full of horizon effects. GoK (white) didn't see the draw coming, the human viewer of course does: https://lichess.org/kkgDG4Q6

Last edited by ArnoHu (Oct. 21, 2018 07:38:12)

ArnoHu

Another engine vs engine test game, actually the standard setup on Scratch 2.0 with similar think time. GoK (Medium, white) vs. Bonsai (Green, black): https://lichess.org/9qz0eFXo. On move 15 GoK ran into a horizon effect, that it would have prevented on a higher level or faster runtime.

On Sulfurous, GoK (Easy) is 3:1 against Bonsai (Green).

I also let GoK (Easy, Sulfurous) play one game against each Archimedes, The Turk and Midecah. GoK won every single game in less than ten moves, but of course benefited from opponent's mistakes.

Last edited by ArnoHu (Nov. 10, 2018 09:41:50)

ArnoHu

Game of Kings plays against the first three Scratch Chess Engines ever created

GoK Chess (Easy, Sulfurous) vs. Midecah Chess (Scratch 2.0, as project doesn't work on Sulfurous): https://lichess.org/zyO6s1v1 (GoK wins in 8 moves)
GoK Chess (Easy, Sulfurous) vs. The Turk (Sulfurous): https://lichess.org/UN8CTbxq (GoK wins in 9 moves)
GoK Chess (Easy, Sulfurous) vs. Archimedes Chess (Sulfurous): https://lichess.org/mCInk9M2 (GoK wins in 6 moves)

Last edited by ArnoHu (Nov. 17, 2018 05:08:21)

ArnoHu

Game of Kings plays against its favorite opponent: Bonsai

With the Zobrist hash overflow bug fixed (which had led to transposition table cache misses on Scratch 2.0), GoK plays better against Bonsai due to additional search depth via iterative deepening:

GoK Chess (Medium, Scratch 2.0) vs. Bonsai Chess (Green, Scratch 2.0): https://lichess.org/QJbnvseV (GoK wins in 45 moves)
GoK Chess (Medium, Scratch 2.0) vs. Bonsai Chess (Green, Scratch 2.0): https://lichess.org/5Swn6lZd (GoK wins in 20 moves)
GoK Chess (Medium, Scratch 2.0) vs. Bonsai Chess (Green, Scratch 2.0): https://lichess.org/k2jh1cX8 (GoK wins in 60 moves)

GoK Chess (Difficult 60sec, Scratch 2.0) vs. Bonsai Chess (Green, Scratch 2.0): https://lichess.org/SlVbzo41 (GoK wins in 46 moves)

Sulfurous had not been affected. No int overflows there.

GoK Chess (Medium, Sulfurous) vs. Bonsai Chess (Green, Sulfurous): https://lichess.org/ciUVDrP2 (GoK wins in 41 moves)
GoK Chess (Medium, Sulfurous) vs. Bonsai Chess (Green, Sulfurous): https://lichess.org/YkjXcwlx (GoK wins in 55 moves)
GoK Chess (Medium, Sulfurous) vs. Bonsai Chess (Green, Sulfurous): https://lichess.org/TU21EnB9 (GoK wins in 42 moves)

GoK Chess (Easy, Sulfurous) vs. Bonsai Chess (Green, Sulfurous): https://lichess.org/dmeNfEnA (GoK wins in 58 moves)
GoK Chess (Easy, Sulfurous) vs. Bonsai Chess (Green, Sulfurous): https://lichess.org/dEE4YttC (Bonsai wins in 72 moves)
GoK Chess (Easy, Sulfurous) vs. Bonsai Chess (Green, Sulfurous): https://lichess.org/VdqmxKf2 (GoK wins in 63 moves)

GoK Chess (Difficult, Sulfurous) vs. Bonsai Chess (Blue, Sulfurous): https://lichess.org/hfBdrDkA (GoK wins in 42 moves)

Last edited by ArnoHu (Nov. 21, 2018 20:43:39)

ArnoHu

Chess Engines on Scratch 3.0

GoK Chess (Medium) vs. Bonsai Chess (Green Belt): https://lichess.org/Glpf2rqU (GoK wins in 44 moves)
GoK Chess (Medium) vs. Midecah Chess: Midecah Chess causes error on Scratch 3.0
GoK Chess (Medium) vs. The Turk: https://lichess.org/ND5FIxHu (GoK wins in 29 moves)
GoK Chess (Medium) vs. Archimedes Chess: https://lichess.org/BCnGTaOB (GoK wins in 36 moves)

Last edited by ArnoHu (Nov. 17, 2018 06:34:02)

waabooboo

I have tested GoK against my professional-strength chess engine, Shredder. I initially set Shredder to play at 1800 elo, and Shredder adjusted its playing strength by itself after each game depending on how GoK did against it. Five games were played, which I have notated below. Also listed for each game is the strength Shredder was playing at and Shredder's estimate for GoK's playing strength at the time.

Game #1: GoK (?) – Shredder (1800) (1-0)

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Bd2 O-O 6. cxd5 exd5 7. Bb5 a6 8. Qa4 Bxc3 9. Bxc3 Bd7 10. Bxd7 Nbxd7 11. Qc2 Ne4 12. Bb4 Re8 13. Nf3 a5 14. Ba3 Ra6 15. O-O Rg6 16. b3 Qb8 17. Qd3 c6 18. b4 axb4 19. Bxb4 Qc7 20. a4 f5 21. a5 f4 22. exf4 Qxf4 23. Nd2 Rh6 24. g3 Qf5 25. Rad1 Qh3 26. Nf3 Ng5 27. Nh4 Nb8 28. Rfe1 Ne4 29. f3 Na6 30. Bd2 Rxh4 31. gxh4 Re6 32. Bg5 Nb4 33. Qb3 c5 34. dxc5 Nxg5 35. hxg5 Rg6 36. Re8+ Kf7 37. Re5 Qh4 38. Qe3 Nc2 39. Rf5+ Rf6 40. Qe5 Rxf5 41. Qxf5+ Ke8 42. Qxd5 g6 43. Qd8+ Kf7 44. Qf6+ Kg8 45. Rd8# (1-0)

Game #2: Shredder (2000) – GoK (2200?) (1-0)

1. c4 e5 2. e3 Bb4 3. a3 Bc5 4. d4 exd4 5. exd4 Be7 6. Bd3 d5 7. Nc3 dxc4 8. Bxc4 Nc6 9. Nf3 Nf6 10. d5 Na5 11. Be2 Bg4 12. b4 c6 13. O-O Nxd5 14. Nxd5 cxd5 15. bxa5 Qxa5 16. Rb1 O-O 17. Rxb7 Bc5 18. Rb5 Qc7 19. Qxd5 Bd6 20. Rb7 Bxf3 21. Qxf3 Bxh2+ 22. Kh1 Qe5 23. g3 Bxg3 24. Bb2 Qe6 25. fxg3 Rad8 26. Qg4 Qh6+ 27. Qh5 Qc6+ 28. Bf3 Qc4 29. Bg2 Rd3 30. Qg5 g6 31. Qf6 Rc3 32. Bxc3 Qxf1+ 33. Bxf1 h6 34. Qg7# (1-0)

Game #3: GoK (1900?) – Shredder (1950) (0-1)

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. c5 b6 5. Be3 bxc5 6. dxc5 e5 7. Nf3 d4 8. Nxe5 Bxc5 9. b4 Bxb4 10. Qa4+ c6 11. Qxb4 dxe3 12. fxe3 Qc7 13. Nc4 Na6 14. Qa3 Qe7 15. Qxe7+ Kxe7 16. Ne5 Nb4 17. Rc1 Bf5 18. e4 Nxe4 19. g4 Nxc3 20. Nxc6+ Nxc6 21. gxf5 Nxa2 22. Rxc6 Rhc8 23. Bg2 Rxc6 24. Bxc6 Rc8 25. Bf3 Kf6 26. e4 Rc2 27. O-O Ke5 28. Rb1 Kf4 29. Rf1 Rd2 30. f6 g6 31. Be2+ Ke5 32. Bc4 Nc3 33. Bxf7 Rd6 34. Bc4 Rxf6 35. Rxf6 Kxf6 36. Kf2 Nxe4+ 37. Ke3 Ke5 38. h4 a5 39. Bg8 Nf6 40. Bb3 Nd5+ 41. Kf2 Ke4 42. Bc2+ Kf4 43. Bb3 Nc3 44. Bg8 a4 45. Bxh7 a3 46. Bg8 a2 47. Bxa2 Nxa2 48. Ke2 Nc3+ 49. Kd3 Kg3 50. Kxc3 Kxh4 51. Kd4 g5 52. Kd3 g4 53. Ke3 g3 54. Kf3 Kh3 55. Ke3 Kh2 56. Kf4 g2 57. Ke3 g1=Q+ 58. Kd3 Qg4 59. Kd2 Qd4+ 60. Kc1 Qc3+ 61. Kb1 Kg3 62. Ka2 Kf4 63. Kb1 Ke3 64. Ka2 Kd2 65. Kb1 Qb4+ 66. Ka2 Kc2 67. Ka1 Qb2# (0-1)

Game 4: Shredder (1873) – GoK (1796?) (0-1)

1. g4 e5 2. Bg2 d5 3. d4 Bxg4 4. dxe5 c6 5. h3 Bf5 6. Nc3 Bb4 7. Nf3 Ne7 8. a3 Bxc3+ 9. bxc3 O-O 10. Rb1 Nd7 11. Rxb7 Nc5 12. Rb4 a5 13. Rb1 Ne4 14. Qd4 c5 15. Qe3 Nc6 16. Nd2 Nxd2 17. Bxd2 Bxc2 18. Rb5 d4 19. Qf3 dxc3 20. Qxc3 Nd4 21. Rb7 Bg6 22. Qxc5 Nc2+ 23. Kd1 Rc8 24. Qd6 Qh4 25. f4 Rcd8 26. Rd7 Rxd7 27. Qxd7 Rd8 28. Qa7 Qxf4 29. Bd5 Qa4 30. Bf3 Ne3+ 31. Kc1 Qxa3# (0-1)

Game 5: GoK (1905?) – Shredder (1889) (½ ½)

1. e4 e6 2. d4 c5 3. Bf4 Qb6 4. b3 cxd4 5. Nd2 Bb4 6. Qg4 g6 7. Qg5 f6 8. Qb5 Qxb5 9. Bxb5 e5 10. Bg3 a6 11. Bc4 d6 12. O-O-O Ne7 13. f4 b5 14. Be2 O-O 15. Ngf3 Be6 16. Kb1 Nd7 17. h3 Rac8 18. Bf2 d5 19. fxe5 fxe5 20. Bg3 Bxd2 21. Nxd2 Nc6 22. Bf3 Nb4 23. Rc1 Kg7 24. a3 dxe4 25. Nxe4 Nd5 26. Nd6 Rc6 27. Ne4 a5 28. Be1 b4 29. Ng5 N7b6 30. Bg3 Rf5 31. Nxe6+ Rxe6 32. Bg4 Nc3+ 33. Ka1 bxa3 34. Rhe1 Nd7 35. Bf2 Rb6 36. Bxf5 gxf5 37. Bxd4 exd4 38. Re7+ Kg6 39. Rxd7 Rb4 40. Re1 h5 41. h4 f4 42. Re5 a4 43. Rd6+ Kf7 44. Rd7+ Kg6 45. Rd6+ Kf7 46. Rd7+ Kg6 47. Rd6+ (½ ½)

ArnoHu

waabooboo wrote:
I have tested GoK against my professional-strength chess engine, Shredder. I initially set Shredder to play at 1800 elo, and Shredder adjusted its playing strength by itself after each game depending on how GoK did against it. Five games were played, which I have notated below. Also listed for each game is the strength Shredder was playing at and Shredder's estimate for GoK's playing strength at the time.

Game #1: GoK (?) – Shredder (1800) (1-0)

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Bd2 O-O 6. cxd5 exd5 7. Bb5 a6 8. Qa4 Bxc3 9. Bxc3 Bd7 10. Bxd7 Nbxd7 11. Qc2 Ne4 12. Bb4 Re8 13. Nf3 a5 14. Ba3 Ra6 15. O-O Rg6 16. b3 Qb8 17. Qd3 c6 18. b4 axb4 19. Bxb4 Qc7 20. a4 f5 21. a5 f4 22. exf4 Qxf4 23. Nd2 Rh6 24. g3 Qf5 25. Rad1 Qh3 26. Nf3 Ng5 27. Nh4 Nb8 28. Rfe1 Ne4 29. f3 Na6 30. Bd2 Rxh4 31. gxh4 Re6 32. Bg5 Nb4 33. Qb3 c5 34. dxc5 Nxg5 35. hxg5 Rg6 36. Re8+ Kf7 37. Re5 Qh4 38. Qe3 Nc2 39. Rf5+ Rf6 40. Qe5 Rxf5 41. Qxf5+ Ke8 42. Qxd5 g6 43. Qd8+ Kf7 44. Qf6+ Kg8 45. Rd8# (1-0)

Game #2: Shredder (2000) – GoK (2200?) (1-0)

1. c4 e5 2. e3 Bb4 3. a3 Bc5 4. d4 exd4 5. exd4 Be7 6. Bd3 d5 7. Nc3 dxc4 8. Bxc4 Nc6 9. Nf3 Nf6 10. d5 Na5 11. Be2 Bg4 12. b4 c6 13. O-O Nxd5 14. Nxd5 cxd5 15. bxa5 Qxa5 16. Rb1 O-O 17. Rxb7 Bc5 18. Rb5 Qc7 19. Qxd5 Bd6 20. Rb7 Bxf3 21. Qxf3 Bxh2+ 22. Kh1 Qe5 23. g3 Bxg3 24. Bb2 Qe6 25. fxg3 Rad8 26. Qg4 Qh6+ 27. Qh5 Qc6+ 28. Bf3 Qc4 29. Bg2 Rd3 30. Qg5 g6 31. Qf6 Rc3 32. Bxc3 Qxf1+ 33. Bxf1 h6 34. Qg7# (1-0)

Game #3: GoK (1900?) – Shredder (1950) (0-1)

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. c5 b6 5. Be3 bxc5 6. dxc5 e5 7. Nf3 d4 8. Nxe5 Bxc5 9. b4 Bxb4 10. Qa4+ c6 11. Qxb4 dxe3 12. fxe3 Qc7 13. Nc4 Na6 14. Qa3 Qe7 15. Qxe7+ Kxe7 16. Ne5 Nb4 17. Rc1 Bf5 18. e4 Nxe4 19. g4 Nxc3 20. Nxc6+ Nxc6 21. gxf5 Nxa2 22. Rxc6 Rhc8 23. Bg2 Rxc6 24. Bxc6 Rc8 25. Bf3 Kf6 26. e4 Rc2 27. O-O Ke5 28. Rb1 Kf4 29. Rf1 Rd2 30. f6 g6 31. Be2+ Ke5 32. Bc4 Nc3 33. Bxf7 Rd6 34. Bc4 Rxf6 35. Rxf6 Kxf6 36. Kf2 Nxe4+ 37. Ke3 Ke5 38. h4 a5 39. Bg8 Nf6 40. Bb3 Nd5+ 41. Kf2 Ke4 42. Bc2+ Kf4 43. Bb3 Nc3 44. Bg8 a4 45. Bxh7 a3 46. Bg8 a2 47. Bxa2 Nxa2 48. Ke2 Nc3+ 49. Kd3 Kg3 50. Kxc3 Kxh4 51. Kd4 g5 52. Kd3 g4 53. Ke3 g3 54. Kf3 Kh3 55. Ke3 Kh2 56. Kf4 g2 57. Ke3 g1=Q+ 58. Kd3 Qg4 59. Kd2 Qd4+ 60. Kc1 Qc3+ 61. Kb1 Kg3 62. Ka2 Kf4 63. Kb1 Ke3 64. Ka2 Kd2 65. Kb1 Qb4+ 66. Ka2 Kc2 67. Ka1 Qb2# (0-1)

Game 4: Shredder (1873) – GoK (1796?) (0-1)

1. g4 e5 2. Bg2 d5 3. d4 Bxg4 4. dxe5 c6 5. h3 Bf5 6. Nc3 Bb4 7. Nf3 Ne7 8. a3 Bxc3+ 9. bxc3 O-O 10. Rb1 Nd7 11. Rxb7 Nc5 12. Rb4 a5 13. Rb1 Ne4 14. Qd4 c5 15. Qe3 Nc6 16. Nd2 Nxd2 17. Bxd2 Bxc2 18. Rb5 d4 19. Qf3 dxc3 20. Qxc3 Nd4 21. Rb7 Bg6 22. Qxc5 Nc2+ 23. Kd1 Rc8 24. Qd6 Qh4 25. f4 Rcd8 26. Rd7 Rxd7 27. Qxd7 Rd8 28. Qa7 Qxf4 29. Bd5 Qa4 30. Bf3 Ne3+ 31. Kc1 Qxa3# (0-1)

Game 5: GoK (1905?) – Shredder (1889) (½ ½)

1. e4 e6 2. d4 c5 3. Bf4 Qb6 4. b3 cxd4 5. Nd2 Bb4 6. Qg4 g6 7. Qg5 f6 8. Qb5 Qxb5 9. Bxb5 e5 10. Bg3 a6 11. Bc4 d6 12. O-O-O Ne7 13. f4 b5 14. Be2 O-O 15. Ngf3 Be6 16. Kb1 Nd7 17. h3 Rac8 18. Bf2 d5 19. fxe5 fxe5 20. Bg3 Bxd2 21. Nxd2 Nc6 22. Bf3 Nb4 23. Rc1 Kg7 24. a3 dxe4 25. Nxe4 Nd5 26. Nd6 Rc6 27. Ne4 a5 28. Be1 b4 29. Ng5 N7b6 30. Bg3 Rf5 31. Nxe6+ Rxe6 32. Bg4 Nc3+ 33. Ka1 bxa3 34. Rhe1 Nd7 35. Bf2 Rb6 36. Bxf5 gxf5 37. Bxd4 exd4 38. Re7+ Kg6 39. Rxd7 Rb4 40. Re1 h5 41. h4 f4 42. Re5 a4 43. Rd6+ Kf7 44. Rd7+ Kg6 45. Rd6+ Kf7 46. Rd7+ Kg6 47. Rd6+ (½ ½)

Wooow, really cool - thanks for the effort. So this was running GoK with the fast Sulfurous engine at https://sulfurous.aau.at/html/app.html?id=148769358, right? On level Difficult, when you press ‘c’, GoK goes into a 60 seconds think time mode. I let it play five games against Stockfish 6 (1900), and it ended 2,5 : 2,5. Combined with your results I conclude that GoK plays at around ELO 1900.

waabooboo

ArnoHu wrote:
waabooboo wrote:
I have tested GoK against my professional-strength chess engine, Shredder. I initially set Shredder to play at 1800 elo, and Shredder adjusted its playing strength by itself after each game depending on how GoK did against it. Five games were played, which I have notated below. Also listed for each game is the strength Shredder was playing at and Shredder's estimate for GoK's playing strength at the time.

Game #1: GoK (?) – Shredder (1800) (1-0)

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Bd2 O-O 6. cxd5 exd5 7. Bb5 a6 8. Qa4 Bxc3 9. Bxc3 Bd7 10. Bxd7 Nbxd7 11. Qc2 Ne4 12. Bb4 Re8 13. Nf3 a5 14. Ba3 Ra6 15. O-O Rg6 16. b3 Qb8 17. Qd3 c6 18. b4 axb4 19. Bxb4 Qc7 20. a4 f5 21. a5 f4 22. exf4 Qxf4 23. Nd2 Rh6 24. g3 Qf5 25. Rad1 Qh3 26. Nf3 Ng5 27. Nh4 Nb8 28. Rfe1 Ne4 29. f3 Na6 30. Bd2 Rxh4 31. gxh4 Re6 32. Bg5 Nb4 33. Qb3 c5 34. dxc5 Nxg5 35. hxg5 Rg6 36. Re8+ Kf7 37. Re5 Qh4 38. Qe3 Nc2 39. Rf5+ Rf6 40. Qe5 Rxf5 41. Qxf5+ Ke8 42. Qxd5 g6 43. Qd8+ Kf7 44. Qf6+ Kg8 45. Rd8# (1-0)

Game #2: Shredder (2000) – GoK (2200?) (1-0)

1. c4 e5 2. e3 Bb4 3. a3 Bc5 4. d4 exd4 5. exd4 Be7 6. Bd3 d5 7. Nc3 dxc4 8. Bxc4 Nc6 9. Nf3 Nf6 10. d5 Na5 11. Be2 Bg4 12. b4 c6 13. O-O Nxd5 14. Nxd5 cxd5 15. bxa5 Qxa5 16. Rb1 O-O 17. Rxb7 Bc5 18. Rb5 Qc7 19. Qxd5 Bd6 20. Rb7 Bxf3 21. Qxf3 Bxh2+ 22. Kh1 Qe5 23. g3 Bxg3 24. Bb2 Qe6 25. fxg3 Rad8 26. Qg4 Qh6+ 27. Qh5 Qc6+ 28. Bf3 Qc4 29. Bg2 Rd3 30. Qg5 g6 31. Qf6 Rc3 32. Bxc3 Qxf1+ 33. Bxf1 h6 34. Qg7# (1-0)

Game #3: GoK (1900?) – Shredder (1950) (0-1)

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. c5 b6 5. Be3 bxc5 6. dxc5 e5 7. Nf3 d4 8. Nxe5 Bxc5 9. b4 Bxb4 10. Qa4+ c6 11. Qxb4 dxe3 12. fxe3 Qc7 13. Nc4 Na6 14. Qa3 Qe7 15. Qxe7+ Kxe7 16. Ne5 Nb4 17. Rc1 Bf5 18. e4 Nxe4 19. g4 Nxc3 20. Nxc6+ Nxc6 21. gxf5 Nxa2 22. Rxc6 Rhc8 23. Bg2 Rxc6 24. Bxc6 Rc8 25. Bf3 Kf6 26. e4 Rc2 27. O-O Ke5 28. Rb1 Kf4 29. Rf1 Rd2 30. f6 g6 31. Be2+ Ke5 32. Bc4 Nc3 33. Bxf7 Rd6 34. Bc4 Rxf6 35. Rxf6 Kxf6 36. Kf2 Nxe4+ 37. Ke3 Ke5 38. h4 a5 39. Bg8 Nf6 40. Bb3 Nd5+ 41. Kf2 Ke4 42. Bc2+ Kf4 43. Bb3 Nc3 44. Bg8 a4 45. Bxh7 a3 46. Bg8 a2 47. Bxa2 Nxa2 48. Ke2 Nc3+ 49. Kd3 Kg3 50. Kxc3 Kxh4 51. Kd4 g5 52. Kd3 g4 53. Ke3 g3 54. Kf3 Kh3 55. Ke3 Kh2 56. Kf4 g2 57. Ke3 g1=Q+ 58. Kd3 Qg4 59. Kd2 Qd4+ 60. Kc1 Qc3+ 61. Kb1 Kg3 62. Ka2 Kf4 63. Kb1 Ke3 64. Ka2 Kd2 65. Kb1 Qb4+ 66. Ka2 Kc2 67. Ka1 Qb2# (0-1)

Game 4: Shredder (1873) – GoK (1796?) (0-1)

1. g4 e5 2. Bg2 d5 3. d4 Bxg4 4. dxe5 c6 5. h3 Bf5 6. Nc3 Bb4 7. Nf3 Ne7 8. a3 Bxc3+ 9. bxc3 O-O 10. Rb1 Nd7 11. Rxb7 Nc5 12. Rb4 a5 13. Rb1 Ne4 14. Qd4 c5 15. Qe3 Nc6 16. Nd2 Nxd2 17. Bxd2 Bxc2 18. Rb5 d4 19. Qf3 dxc3 20. Qxc3 Nd4 21. Rb7 Bg6 22. Qxc5 Nc2+ 23. Kd1 Rc8 24. Qd6 Qh4 25. f4 Rcd8 26. Rd7 Rxd7 27. Qxd7 Rd8 28. Qa7 Qxf4 29. Bd5 Qa4 30. Bf3 Ne3+ 31. Kc1 Qxa3# (0-1)

Game 5: GoK (1905?) – Shredder (1889) (½ ½)

1. e4 e6 2. d4 c5 3. Bf4 Qb6 4. b3 cxd4 5. Nd2 Bb4 6. Qg4 g6 7. Qg5 f6 8. Qb5 Qxb5 9. Bxb5 e5 10. Bg3 a6 11. Bc4 d6 12. O-O-O Ne7 13. f4 b5 14. Be2 O-O 15. Ngf3 Be6 16. Kb1 Nd7 17. h3 Rac8 18. Bf2 d5 19. fxe5 fxe5 20. Bg3 Bxd2 21. Nxd2 Nc6 22. Bf3 Nb4 23. Rc1 Kg7 24. a3 dxe4 25. Nxe4 Nd5 26. Nd6 Rc6 27. Ne4 a5 28. Be1 b4 29. Ng5 N7b6 30. Bg3 Rf5 31. Nxe6+ Rxe6 32. Bg4 Nc3+ 33. Ka1 bxa3 34. Rhe1 Nd7 35. Bf2 Rb6 36. Bxf5 gxf5 37. Bxd4 exd4 38. Re7+ Kg6 39. Rxd7 Rb4 40. Re1 h5 41. h4 f4 42. Re5 a4 43. Rd6+ Kf7 44. Rd7+ Kg6 45. Rd6+ Kf7 46. Rd7+ Kg6 47. Rd6+ (½ ½)

Wooow, really cool - thanks for the effort. So this was running GoK with the fast Sulfurous engine at https://sulfurous.aau.at/html/app.html?id=148769358, right? On level Difficult, when you press ‘c’, GoK goes into a 60 seconds think time mode. I let it play five games against Stockfish 6 (1900), and it ended 2,5 : 2,5. Combined with your results I conclude that GoK plays at around ELO 1900.

Yes, Arno Hu. For the five games, my result was 1902 elo for GoK; pretty darn close to your 1900 result.

ArnoHu

Game of Kings Chess (Medium, Sulfurous) plays Bonsai (Green, Sulfurous), The Turk (Sulfurous), Archimedes Chess (Sulfurous) and Midecah Chess (Scratch 2.0)

GoK (white) vs. Bonsai: GoK wins in 47 moves (https://lichess.org/qUcDFNmk)
GoK (white) vs. The Turk: GoK wins in 17 moves (https://lichess.org/eJMpVZwv)
GoK (white) vs. Archimedes: GoK wins in 22 moves (https://lichess.org/fv43OkrY)
GoK (white) vs. Midecah: GoK wins in 11 moves (https://lichess.org/Gqtj0B4n)

Discuss Scratch