OK, I've modified the code to correctly store in the hash table and ran 100 games against TSCP. Plankton got a score of 83% which is the highest yet. But in game 6 where Plankton was clearly winning the game ended in a draw due to 3-fold repetition. Here is the game:
[pgn][Event "T15_Raz_Pru_Tap_Futility.at"]
[Site "RCH-DIV-GT250J2"]
[Date "2020.07.10"]
[Round "6"]
[White "TSCP181c"]
[Black "Plankton64_03"]
[Result "1/2-1/2"]
[BlackElo "2200"]
[ECO "D50"]
[Opening "QGD"]
[Time "12:57:22"]
[Variation "Semi-Tarrasch, Old Pillsbury Variation"]
[WhiteElo "2200"]
[TimeControl "0+3"]
[Termination "normal"]
[PlyCount "137"]
[WhiteType "human"]
[BlackType "human"]
1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. Nf3 c5 5. Bg5 {(e2e3 b8d7 c4d5 f6d5 f1c4
d5c3 b2c3) +0.07/6 2} cxd4 {(c5xd4 Nf3xd4 d5xc4 Qd1-a4+ Nb8-d7 Qa4xc4 e6-e5
Nd4-c2 Bf8-e7 e2-e4 O-O O-O-O) +0.35/11 2} 6. Qxd4 {(d1d4 f8e7 c4d5 e6d5
e1c1 b8c6) +0.22/6 2} Nc6 {(Nb8-c6 Qd4-h4 Bf8-e7 O-O-O h7-h6 c4xd5 e6xd5
Bg5xf6 Be7xf6 Qh4-h5 d5-d4) +0.50/11 2} 7. Qh4 {(d4h4 d5c4 a1d1 d8b6 g5f6
b6b2 f6d4 c6d4 h4d4) +0.06/7 2} Be7 {(Bf8-e7 c4xd5 e6xd5 e2-e4 d5xe4 Nc3xe4
Nf6xe4 Qh4xe4 O-O Bg5xe7 Nc6xe7) +0.41/11 2} 8. O-O-O {(e1c1 e8g8 e2e4 h7h6
g5f6 e7f6) +0.25/6 2} h6 {(h7-h6 c4xd5 e6xd5 Bg5xf6 Be7xf6 Qh4-h5 Bf6xc3
b2xc3 Qd8-a5 Qh5xd5 Qa5xc3+) +0.37/11 2} 9. cxd5 {(c4d5 e6d5 e2e4 e8g8 g5f6
e7f6) +0.29/6 2} exd5 {(e6xd5 e2-e4 O-O Nc3xd5 Nf6xd5 Bg5xe7 Nc6xe7 e4xd5
Ne7xd5 Bf1-c4 Bc8-e6 Qh4xd8 Ra8xd8) +0.17/11 2} 10. Bxf6 {(g5f6 e7f6 h4f4
f6c3 f4e3 c8e6 e3c3) -0.04/6 2} Bxf6 {(Be7xf6 Qh4-a4 Qd8-b6 Qa4-a3 Bf6xc3
Qa3xc3 Qb6xf2 Qc3xg7 Qf2-c5+ Kc1-d2 Qc5-f8 Qg7-f6) +0.27/11 2} 11. Qa4
{(h4a4 f6c3 b2c3 e8g8 e2e4 c8e6 f1c4) -0.08/7 2} Bxc3 {(Bf6xc3 b2xc3 Qd8-f6
Rd1xd5 Qf6xc3+ Kc1-b1 O-O e2-e4 Bc8-e6 Rd5-d3 Qc3-c5 Nf3-d4 Nc6xd4 Rd3xd4)
+0.40/11 2} 12. bxc3 {(b2c3 d8f6 a4b3 e8g8 e2e3 c8g4 f1e2) -0.26/7 2} Qf6
{(Qd8-f6) +0.40/10 2} 13. Qa3 {(a4a3 c8e6 e2e3 e8c8 f1b5 h8e8 b5c6 b7c6)
-0.31/6 2} Be6 {(Bc8-e6 e2-e3 O-O-O Bf1-b5 Be6-g4 Bb5-e2 Kc8-b8 h2-h3
Bg4xf3 Be2xf3 Nc6-e5 Rd1xd5 Rd8xd5 Bf3xd5 Qf6xf2) +0.38/11 2} 14. e3 {(e2e3
e8c8 f1b5 d8e8 h2h4 h6h5 b5c6 b7c6) -0.30/6 2} O-O-O {(O-O-O Bf1-b5 Be6-g4)
+0.31/10 2} 15. h3 {(h2h3 d8e8 f1b5 h8h7 b5c6 b7c6) -0.30/6 2} Kb8 {(Kc8-b8
Bf1-b5 Rd8-c8 Bb5-d3 g7-g5 Kc1-b1 Be6-f5 Qa3-a4 Bf5-e6 Qa4-c2) +0.38/10 2}
16. Bb5 {(f1b5 c6e5 f3e5 f6e5 b5d3 d8c8) -0.15/6 2} Rc8 {(Rd8-c8 Bb5-d3)
+0.36/9 2} 17. Rd2 {(d1d2 f6e7 a3b2 h6h5 b5c6 c8c6) -0.16/6 2} Rc7 {(Rc8-c7
Kc1-b2 Nc6-e5 Nf3-d4 a7-a6 Bb5-f1 Be6-d7 g2-g4 Qf6-b6+ Qa3-b4 Qb6-f6)
+0.38/10 2} 18. Bxc6 {(b5c6 c7c6 f3d4 c6a6 a3c5 h8e8) -0.10/6 2} Rxc6
{(Rc7xc6 Nf3-d4 Rc6-a6 Qa3-b2 Ra6-b6 Qb2-a1 Qf6-g6 g2-g4) +0.20/10 2} 19.
Nd4 {(f3d4 c6a6 a3b4 h8e8 d2b2 f6e7) -0.10/6 2} Ra6 {(Rc6-a6 Qa3-b2 Ra6-b6
Qb2-a1 Be6-d7 g2-g3 Qf6-g6 Rd2-c2 Qg6-e4 Rh1-h2 f7-f5) +0.23/11 2} 20. Qb4
{(a3b4 f6g6 h1h2 h8e8 d2b2 a6b6) -0.10/6 2} Rb6 {(Ra6-b6 Qb4-a5 Qf6-g6
Nd4-b5 Rb6xb5 Qa5xb5 Qg6xg2 Qb5-f1 Qg2xf1+ Rh1xf1 Be6xh3 Rf1-g1) +1.04/11
2} 21. Qa5 {(b4a5 f6g6 d4b5 g6g2 a5a7 b8c8 a7b6 g2h1) -0.38/6 2} Qg6
{(Qf6-g6 Nd4-b5 Rb6xb5 Qa5xb5 Qg6xg2 Qb5-f1 Qg2xf1+ Rh1xf1 Be6xh3 Rf1-g1
Rh8-c8 Rg1xg7 Rc8xc3+) +0.72/11 2} 22. Nb5 {(d4b5 b6b5 a5b5 g6g2 h1d1 g2h3)
-0.49/6 2} Rxb5 {(Rb6xb5 Qa5xb5 Qg6xg2 Qb5-f1 Qg2xf1+ Rh1xf1 Be6xh3 Rf1-g1
g7-g5 Rd2xd5 Bh3-e6 Rd5-a5) +0.11/11 2} 23. Qxb5 {(a5b5 g6g2 b5f1 e6h3 f1d1
h8c8 d2d5 c8c3) -0.39/7 2} Qxg2 {(Qg6xg2 Qb5-f1 Qg2xf1+ Rh1xf1 Be6xh3
Rf1-g1 h6-h5 Rg1xg7 Bh3-e6 f2-f4 h5-h4 Kc1-c2) +0.12/11 2} 24. Qf1 {(b5f1
g2f1 h1f1 e6h3 f1g1 h8h7 d2d5 h6h5) +0.28/7 2} Qxf1+ {(Qg2xf1+ Rh1xf1
Be6xh3 Rf1-g1 g7-g6 Rd2xd5 Bh3-e6 Rd5-d2 h6-h5 e3-e4 Rh8-c8 Kc1-b2 h5-h4)
+0.51/12 2} 25. Rxf1 {(h1f1 e6h3 f1g1 h8h7 d2d5 h3e6 d5d8 b8c7 d8d2)
+0.14/7 2} Bxh3 {(Be6xh3 Rf1-g1 g7-g6 Rd2xd5 Bh3-e6 Rd5-d2 h6-h5 e3-e4)
+0.65/13 2} 26. Rg1 {(f1g1 g7g6 d2d5 h3e6 d5d2 h8c8 c1b2 h6h5) +0.09/8 3}
g6 {(g7-g6) +0.65/12 3} 27. Rxd5 {(d2d5 h3e6 d5d2 h8c8 c1b2 h6h5 e3e4)
+0.27/7 2} Be6 {(Bh3-e6 Rd5-d2 h6-h5 e3-e4 h5-h4 e4-e5 h4-h3 Rg1-h1 g6-g5
Rh1-h2 b7-b5 Kc1-b2) +0.57/12 3} 28. Rd2 {(d5d2 h6h5 e3e4 h5h4 f2f4 h4h3
c1d1 h3h2) -0.02/8 3} h5 {(h6-h5 e3-e4 h5-h4 e4-e5 h4-h3 Rg1-h1 g6-g5
Rh1-h2 Kb8-c7 a2-a4 b7-b6 Kc1-c2) +0.57/12 2} 29. e4 {(e3e4 h5h4 f2f4 h4h3
g1h1 b8c7 c1d1) -0.01/7 3} h4 {(h5-h4 e4-e5 Kb8-c7 f2-f4 h4-h3 Rd2-h2 b7-b5
Kc1-b2 a7-a5 Rg1-h1 Kc7-c6 Kb2-c2) +0.56/12 2} 30. f4 {(f2f4 h4h3 c1d1 h8h4
g1f1 h3h2 d2d8) -0.12/7 3} h3 {(h4-h3 e4-e5 Rh8-h4 Rg1-f1 Kb8-c7 Kc1-b2
b7-b5 Rf1-f2 Kc7-c6 a2-a3 Be6-d5 f4-f5) +0.57/12 2} 31. Rf1 {(g1f1 b8c7
c1d1 c7c6 f1h1 h8h4 h1f1) -0.21/7 3} Kc7 {(Kb8-c7 e4-e5 b7-b5 Kc1-b2 Kc7-c6
Rf1-f2 Be6-d5 Rf2-h2) +0.58/11 2} 32. a3 {(a2a3 f7f6 c1c2 c7c6 f1h1 h8h4
h1g1) -0.21/7 2} b5 {(b7-b5 Rf1-f2 Rh8-h5 e4-e5 a7-a5 Rf2-h2 Kc7-c6 Kc1-b2
Be6-d5 Rd2-d3 Bd5-e6) +0.57/11 3} 33. Rff2 {(f1f2 h8e8 f4f5 e6c4 f2h2 e8e4
f5g6) -0.13/7 2} a5 {(a7-a5 e4-e5 Kc7-c6 Rf2-h2 Rh8-h4 Rd2-d4 Rh4-h5 Kc1-c2
Be6-d5 a3-a4 b5xa4 Rd4xa4) +0.57/11 3} 34. Kc2 {(f4f5 g6f5 e4f5 e6d7 f5f6
h8g8 f2e2) -0.09/7 3} Rh5 {(Rh8-h5 e4-e5 f7-f6 e5xf6 Rh5-f5 Kc2-d3 Rf5xf6
Kd3-d4 Be6-c4 Kd4-e5 Rf6-f5+ Ke5-e4 Kc7-c6) +0.67/12 2} 35. Kd3 {(c2d3 c7c6
d3d4 h5c5 d2d3 c5c4 d4e5 c6c5) -0.16/7 3} g5 {(g6-g5 f4xg5 Rh5xg5 Kd3-d4
Kc7-d6 Rd2-e2 Rg5-g4 Rf2-h2 Rg4-h4 Re2-b2 Rh4-h5 Rh2-f2) +0.68/12 3} 36.
fxg5 {(f4g5 h5g5 d3d4 c7d6 d2d3 g5g2 e4e5 d6d7 f2d2) -0.04/8 2} Rxg5
{(Rh5xg5 Kd3-d4 Kc7-c6 Rf2-h2 Rg5-g1 Rd2-f2 Rg1-d1+ Kd4-e5 a5-a4 Rf2-f6
Rd1-d3 Rh2-c2 Rd3-e3) +0.72/12 2} 37. Kd4 {(d3d4 c7d6 d2e2 g5e5 f2h2 e5g5
e2d2) -0.03/7 3} Kd6 {(Kc7-d6 Rd2-b2 Rg5-h5 Rb2-b1 Rh5-c5 Rf2-h2 a5-a4
Rh2-b2 Be6-d7 Rb2-h2 Bd7-e6) +0.69/11 2} 38. Rh2 {(f2h2 g5c5 d2b2 c5c4 d4d3
e6d7 h2f2 d6e6) -0.08/7 3} Rg1 {(Rg5-g1 Rd2-d3 Rg1-a1 e4-e5+ Kd6-c6 Rd3xh3
Be6xh3 Rh2xh3 Ra1xa3 Rh3-h6+ Kc6-d7 Rh6-f6 Kd7-e7 c3-c4) +1.55/12 2} 39.
Rb2 {(d2b2 d6c6 b2f2 g1d1 d4e5 d1d3 f2c2 c6c5) -0.18/7 2} Kc6 {(Kd6-c6
Rb2-f2 Rg1-d1+ Kd4-e5 Kc6-c5 Rf2-f6 Rd1-d3 Rh2-c2 Kc5-c4 Rf6-f2 a5-a4
Rf2-d2 Rd3xd2 Rc2xd2 Kc4xc3) +1.65/13 3} 40. Rbf2 {(b2f2 g1d1 d4e5 c6c5
f2f6 d1a1 f6e6 f7e6 h2h3 a1a3 e5e6) -0.20/7 2} Rd1+ {(Rg1-d1+) +1.66/12 2}
41. Ke5 {(d4e5 c6c5 f2f6 d1d3 h2c2 c5c4 f6f1 d3c3 c2c3 c4c3) -0.76/7 3} Kc5
{(Kc6-c5 Rf2-d2 Rd1-a1 Rd2-d6 Ra1xa3 Rd6xe6 f7xe6 Rh2xh3 Kc5-c4 Ke5xe6
Ra3xc3 Rh3-h7 b5-b4 e4-e5) +1.81/14 3} 42. Rf6 {(f2f6 d1d3 h2c2 c5c4 f6f2
d3c3 c2c3 c4c3 f2f3) -0.76/8 3} Rd3 {(Rd1-d3 Rh2-c2 Kc5-c4 Rc2-c1 Rd3xc3
Rc1xc3+ Kc4xc3 Ke5-d6 b5-b4 a3xb4 a5xb4 e4-e5 b4-b3 Rf6xe6 f7xe6 Kd6xe6)
+2.30/15 2} 43. Rc2 {(h2c2 c5c4 f6f1 c4b3 c2h2 a5a4 f1a1 b3c3) -0.84/8 3}
Kc4 {(Kc5-c4 Rf6-f2 Rd3xc3 Rc2xc3+ Kc4xc3 Rf2-f3+ Kc3-c4 Ke5-f4 b5-b4 a3xb4
a5xb4 Rf3-f2) +2.43/14 3} 44. Rf1 {(f6f1 d3c3 c2c3 c4c3 f1g1 b5b4 a3b4 a5b4
g1g7) -0.92/8 3} Rxc3 {(Rd3xc3 Rf1-f2 Rc3xc2 Rf2xc2+ Kc4-d3 Rc2-c6 b5-b4
a3xb4 a5xb4 Rc6-d6+ Kd3-e3 Rd6-d1 b4-b3) +2.46/13 3} 45. Rxc3+ {(c2c3 c4c3
f1b1 b5b4 a3b4 a5b4 b1c1 c3d3 c1d1 d3c4 d1d4) -1.22/8 2} Kxc3 {(Kc4xc3
Rf1-f3+ Kc3-c4 Rf3-f1 b5-b4 a3xb4 a5xb4 Rf1-c1+ Kc4-d3 Rc1-f1 b4-b3 Rf1-f2
Kd3-c3 Rf2-f3+) +2.52/13 3} 46. Kf4 {(e5f4 b5b4 a3b4 a5b4 f4e5 c3d2 f1f2
d2d3 f2h2) -1.27/8 3} b4 {(b5-b4 a3xb4 a5xb4 Kf4-e3 b4-b3 Rf1-c1+ Kc3-b2
Rc1-h1 Kb2-a2 Ke3-d3 b3-b2 Kd3-c2 h3-h2 e4-e5 Be6-d5) +2.71/14 3} 47. axb4
{(a3b4 a5b4 f4e5 b4b3 f1f3 c3d2 f3f2 d2e3 f2h2 e3d3) -1.49/8 2} axb4
{(a5xb4 Kf4-e3 b4-b3 Rf1-c1+ Kc3-b2 Ke3-d2 Kb2-a3 Rc1-a1+ Ka3-b4 Ra1-b1
Kb4-c4 Kd2-e3 h3-h2 Rb1-c1+ Kc4-b5 e4-e5 b3-b2) +2.78/14 2} 48. Ke5 {(f4e5
b4b3 f1f3 c3c2 f3f2 c2d3 f2f3 d3e2 f3g3 b3b2 g3g1) -1.56/8 2} b3 {(b4-b3
Rf1-f3+ Kc3-b2 Ke5-d4 Kb2-a3 Rf3-f1 b3-b2 e4-e5 h3-h2 Rf1-h1 Be6-a2 Rh1-d1
b2-b1Q Rd1xb1 Ba2xb1) +5.14/14 2} 49. Rf3+ {(f1f3 c3c2 f3f2 c2d3 e5f4 d3c3
f2f3 c3d4 f3f2 f7f6 f2d2) -1.67/8 3} Kb2 {(Kc3-b2) +5.35/13 3} 50. Kd4
{(e5d4 b2a3 e4e5 h3h2 f3f1 b3b2 f1b1 a3b3) -1.68/8 2} Ka3 {(Kb2-a3)
+5.45/13 2} 51. Rf1 {(e4e5 h3h2 f3f1 b3b2 f1h1 e6f5 e5e6 f7e6) -2.80/8 2}
b2 {(b3-b2 Kd4-e3 Ka3-a2 Ke3-f2 b2-b1Q Rf1xb1 Ka2xb1 Kf2-g3 Kb1-c2 Kg3-f3
Kc2-c3 Kf3-g3 Kc3-d4) +5.67/14 3} 52. Ke5 {(d4e5 e6a2 e5f4 f7f6 f4g3 b2b1q
f1b1 a2b1 g3h3 b1e4) -4.33/7 3} Ka2 {(Ka3-a2 Ke5-f4 b2-b1Q Rf1xb1 Ka2xb1
Kf4-g3 Kb1-c2 Kg3-f2 Kc2-d3 Kf2-f3 Kd3-d4 e4-e5 Kd4xe5 Kf3-g3 f7-f6)
+7.37/15 3} 53. Kf4 {(e5f4 b2b1q f1b1 a2b1 f4f3 b1c2 f3g3 c2d3 g3f4)
-4.81/9 2} b1=Q {(b2-b1Q Rf1xb1 Ka2xb1 Kf4-g3 Kb1-c2 Kg3-f3 Kc2-c3 Kf3-f2
Kc3-d3 Kf2-f3 f7-f6 Kf3-f2 Kd3xe4 Kf2-g3 Ke4-e5) +7.37/15 2} 54. Rxb1
{(f1b1 a2b1 f4g3 b1c2 e4e5 c2d3 g3f3 h3h2 f3g2) -5.28/9 2} Kxb1 {(Ka2xb1
Kf4-g3 Kb1-c2 Kg3-f3 Kc2-d3 e4-e5 Kd3-d4 Kf3-f2 Kd4xe5 Kf2-g3 Be6-d7 Kg3-h2
Bd7-g4 Kh2-g3 f7-f5 Kg3-f2 f5-f4) +7.77/17 3} 55. Kg3 {(f4g3 b1c2 e4e5 c2d3
g3f3 d3d4 f3f2 d4e5 f2g3 f7f6) -6.42/10 3} Kc2 {(Kb1-c2 Kg3-f2 Kc2-d3 e4-e5
Kd3-d4 Kf2-f3 Kd4xe5 Kf3-g3 Be6-g4 Kg3-h2 f7-f5 Kh2-g1 f5-f4 Kg1-f2 Ke5-d5
Kf2-f1 f4-f3) +8.09/17 2} 56. e5 {(e4e5 c2d3 g3f3 d3d4 f3f2 d4e5 f2g3 f7f6
g3f3 f6f5) -6.55/10 3} Kc3 {(Kc2-c3 Kg3-f3 Kc3-d4 Kf3-f2 Kd4xe5 Kf2-g3
Be6-g4 Kg3xg4 h3-h2 Kg4-f3 h2-h1Q+ Kf3-e2 f7-f5 Ke2-d2 f5-f4 Kd2-c2 f4-f3
Kc2-c3) +11.32/17 2} 57. Kf3 {(g3f3 c3d4 f3f2 d4e5 f2g3 f7f6 g3h2 e5f4
h2g1) -6.52/9 2} Kd4 {(Kc3-d4 Kf3-f2 Kd4xe5 Kf2-f1 f7-f5 Kf1-g1 f5-f4
Kg1-f2 Be6-g4 Kf2-f1 f4-f3 Kf1-f2 h3-h2 Kf2-g3 f3-f2 Kg3xg4 h2-h1Q)
+11.75/17 2} 58. Kf2 {(f3f2 d4e5 f2g3 e6g4 g3h2 f7f5 h2g1 f5f4 g1f2 f4f3)
-7.06/10 3} Kxe5 {(Kd4xe5 Kf2-g3 Ke5-e4 Kg3-h2 Ke4-f4 Kh2-g1 Kf4-g3 Kg1-f1
h3-h2 Kf1-e2 h2-h1Q Ke2-e3 f7-f5 Ke3-d3 f5-f4 Kd3-c2 f4-f3 Kc2-c3)
+14.50/18 2} 59. Kf3 {(f2g3 e6g4 g3h2 f7f5 h2h1 f5f4 h1g1 f4f3 g1f2)
-7.06/9 3} f5 {(f7-f5 Kf3-g3 f5-f4+ Kg3-f2 Be6-d5 Kf2-g1 f4-f3 Kg1-h2 f3-f2
Kh2xh3 f2-f1Q+ Kh3-h4 Qf1-g2 Kh4-h5 Qg2-h3+ Kh5-g5 Qh3-g2+) +13.29/16 2}
60. Kf2 {(f3f2 e5f4 f2f1 e6d5 f1g1 f4g3 g1f1 h3h2 f1e2 h2h1q) -13.46/10 3}
Kf4 {(Ke5-f4 Kf2-f1 Kf4-f3 Kf1-g1 Kf3-g3 Kg1-f1 h3-h2 Kf1-e2 h2-h1Q Ke2-d2)
+18.16/16 3} 61. Ke2 {(f2f1 e6c4 f1f2 c4d3 f2g1 f4g3 g1h1 d3e4 h1g1 h3h2
g1f1 h2h1q) -13.66/9 2} h2 {(h3-h2 Ke2-d3 h2-h1Q Kd3-c3 Qh1-e1+ Kc3-b2
Qe1-d1 Kb2-c3 Qd1-b3+ Kc3-d2 Qb3-b2+) +199.77/15} 62. Kd3 {(e2d3 f4e5 d3d2
h2h1q d2c3 f5f4 c3d3 f4f3) -14.07/8 2} h1=Q {(h2-h1Q Kd3-d2 Qh1-d5+)
+199.77/5} 63. Kd2 {(d3d2 f4e5 d2d3 f5f4 d3c3 h1h3 c3b4 f4f3) -14.17/7 3}
Qd5+ {(Qh1-d5+) +199.79/2} 64. Kc3 {(d2c3 f4e5 c3b4 f5f4 b4a4 d5c4 a4a5
f4f3) -14.27/6 3} Qb3+ {(Qd5-b3+) +199.85/2} 65. Kd2 {(c3d2 b3b2 d2d3 b2c1
d3e2 e6c4 e2f2 c1f1) -M4/6} Qb2+ {(Qb3-b2+) +199.87/2} 66. Kd3 {(d2d3 b2c1
d3e2 e6c4 e2f2 c1f1) -M3/5} Qb3+ {(Qb2-b3+) +199.85/2} 67. Kd2 {(d3d2)
0.00/23 3} Qe3+ {(Qb3-e3+ Kd2-c2 Qe3-b3+) +199.79/3} 68. Kc2 {(d2c2 f4e5
c2b2 e3d2 b2b1 f5f4 b1a1 f4f3) -14.57/6 3} Qb3+ {(Qe3-b3+) +199.81/2} 69.
Kd2 {(c2d2) 0.00/32 3-fold repetition} 1/2-1/2
[/pgn]
I set up the position from the command prompt and got a different outcome. The mate is discovered (great) and there is a bit of shuffling around but at least the outcome is mate:
Code: Select all
Ian's Low Memory Chess Program (plankton)
Version 8.7.6, 10/7/2020
Copyright 2020 Ian Mitchell
With late move reductions!
With history heuristic!
With evaluation cache!
With null moves!
With hash table!
With tapered eval!
With razoring!
With reverse pruning!
With futility pruning!
"help" displays a list of commands.
plankton> fen 8/8/4b3/5p2/5k2/7p/4K3/8 b - - 3 61
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . . . . . p 3
2 . . . . K . . . 2
1 . . . . . . . . 1
A B C D E F G H
Black to move.
plankton> st 60
Search time: 60000ms
plankton> go
ply mv time nodes score pv
1 0 0 15 761 1 h3h2
2 0 0 53 1422 3 h3h2 e2d3 (h2h1q)
3 0 16 116 1422 3 h3h2 e2d3 h2h1q
4 0 16 187 1411 5 h3h2 e2d3 h2h1q d3d4
5 0 16 324 1416 6 h3h2 e2d3 h2h1q d3d4 e6d5
6 0 16 968 1438 8 h3h2 e2d3 h2h1q d3d4 h1h8 d4d3 (f4e5)
7 0 16 3624 1446 9 h3h2 e2d3 h2h1q d3d4 h1d1 d4c3 f4e5 (c3b2)
8 0 16 9621 1461 11 h3h2 e2d3 h2h1q d3d2 f4e5 d2c2 h1e4 c2c3 (f5f4)
9 0 31 31375 1471 12 h3h2 e2d3 h2h1q d3d4 h1d1 d4c5 f4e5 c5b5 d1d5 (b5b4 f5f4)
10 0 47 52354 1474 13 h3h2 e2d3 h2h1q d3d4 h1d1 d4c5 f4e5 c5b4 f5f4 b4c3 (f4f3)
11 0 156 246491 1479 14 h3h2 e2d3 h2h1q d3c3 f4e5 c3d3 f5f4 d3d2 f4f3 d2e3 e6d5
12 0 391 710645 1488 18 h3h2 e2d3 h2h1q d3d2 f4e5 d2e2 f5f4 e2f2
13 0 656 1235803 2169 19 h3h2 e2d3 h2h1q d3d2 f4e5 d2e2 f5f4 e2f2 f4f3 f2e3 h1g1 e3d2 f3f2 (d2c2 f2f1q)
14 0 1109 2058831 2169 19 h3h2 e2d3 h2h1q d3d2 f4e5 d2e2 f5f4 e2f2 f4f3 f2e3 h1g1 e3d2 f3f2 d2c2 (f2f1q)
15 0 1281 2292098 2169 20 h3h2 e2d3 h2h1q d3d2 f4e5 d2e2 f5f4 e2f2 f4f3 f2e3 h1g1 e3d2 f3f2 d2c2 f2f1q (c2b2)
16 0 3531 6322904 2169 23 h3h2 e2d3 h2h1q d3d2 f4e5 d2e2 f5f4 e2d3 f4f3 d3c3 h1g2 c3b4 g2g4 b4c3 f3f2 c3d2 (f2f1q)
17 0 12594 22157818 19985 27 h3h2 e2d3 h2h1q d3d2 f4f3 d2c3 h1e1 c3c2 f3e4 c2b2 e1d2 b2b1 e4f4
nreps: 42106
nhash: 3509812
hashorder: 1157361
razor: 170721
prune: 3323597
hist: 57849
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . . . . . . 3
2 . . . . K . . p 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: h3h2
plankton> e2d3
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . K . . . . 3
2 . . . . . . . p 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 2 0 18 1422 1 h2h1q
2 2 0 43 1411 2 h2h1q d3d4
3 2 0 116 1416 4 h2h1q d3d4 e6d5
4 2 0 809 1481 6 h2h1q d3d4 h1b1
5 2 0 2419 19981 7 h2h1q d3d4 h1d5 d4c3 d5b3
nreps: 3
nhash: 157
hashorder: 212
razor: 34
prune: 199
hist: 12
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . K . . . . 3
2 . . . . . . . . 2
1 . . . . . . . q 1
A B C D E F G H
Computer's move: h2h1q
plankton> d3d2
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . . . . . . 3
2 . . . K . . . . 2
1 . . . . . . . q 1
A B C D E F G H
ply mv time nodes score pv
1 4 0 36 1442 1 f4e5
2 4 0 204 1442 3 h1d5 d2c2 (f4e5)
3 4 0 2242 1461 5 f4e5 d2d3 f5f4
4 4 0 2654 1461 5 f4e5 d2c2 f5f4 c2c3
5 4 0 9753 19975 9 h1d5 d2e1 d5e4 e1d2 e4e3 (d2c2 e3b3)
nreps: 16
nhash: 569
hashorder: 683
razor: 79
prune: 345
hist: 20
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . q . p . . 5
4 . . . . . k . . 4
3 . . . . . . . . 3
2 . . . K . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: h1d5, check!
plankton> d2c3
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . q . p . . 5
4 . . . . . k . . 4
3 . . K . . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 6 0 33 1438 2 f4e5
2 6 16 263 19985 3 d5b3
nreps: 0
nhash: 4
hashorder: 15
razor: 3
prune: 9
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . q K . . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: d5b3, check!
plankton> c3d2
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . q . . . . . . 3
2 . . . K . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 8 0 33 1442 1 f4e5
2 8 0 119 19987 3 b3b2
nreps: 1
nhash: 10
hashorder: 7
razor: 0
prune: 4
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . . . . . . 3
2 . q . K . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: b3b2, check!
plankton> d2d3
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . K . . . . 3
2 . q . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 10 0 37 1438 1 f4e5
2 10 0 287 1442 3 b2a3 d3c2 (f4e5)
3 10 16 1269 2177 5 b2b1 d3c3 b1c1
4 10 16 1478 19979 6 b2b1 d3c3 b1e1 c3d3 (e1d1)
nreps: 11
nhash: 145
hashorder: 141
razor: 22
prune: 168
hist: 10
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . K . . . . 3
2 . . . . . . . . 2
1 . q . . . . . . 1
A B C D E F G H
Computer's move: b2b1, check!
plankton> d3d4
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . K . k . . 4
3 . . . . . . . . 3
2 . . . . . . . . 2
1 . q . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 12 0 32 1411 2 b1b6
2 12 0 63 19983 1 b1b6
nreps: 0
nhash: 27
hashorder: 1
razor: 0
prune: 3
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . q . . b . . . 6
5 . . . . . p . . 5
4 . . . K . k . . 4
3 . . . . . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: b1b6, check!
plankton> d4d3
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . q . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . K . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 14 0 33 1438 1 f4e5
2 14 0 352 19979 3 b6e3
nreps: 2
nhash: 11
hashorder: 13
razor: 1
prune: 6
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . K q . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: b6e3, check!
plankton> d3c2
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . . q . . . 3
2 . . K . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 16 0 34 1442 1 f4e5
2 16 0 197 1446 3 f4e5 c2b2
3 16 0 2094 1470 5 e3e2 c2b1 e2d2 (b1a1)
4 16 15 3644 1486 7 e3e2 c2b1 e2d2 b1a1 (f4e5)
5 16 15 6305 19979 9 e3e2 c2c3 e2c4
nreps: 13
nhash: 566
hashorder: 418
razor: 27
prune: 192
hist: 14
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . . . . . . 3
2 . . K . q . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: e3e2, check!
plankton> c2c3
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . K . . . . . 3
2 . . . . q . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 18 0 36 1438 2 f4e5
2 18 0 72 19981 1 e2c4
nreps: 0
nhash: 31
hashorder: 1
razor: 0
prune: 4
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . q . . k . . 4
3 . . K . . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: e2c4, check!
plankton> c3d2
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . q . . k . . 4
3 . . . . . . . . 3
2 . . . K . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 20 0 31 1442 1 f4e5
2 20 0 167 19983 3 c4a2
nreps: 1
nhash: 5
hashorder: 12
razor: 3
prune: 6
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . . . . . . 3
2 q . . K . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: c4a2, check!
plankton> d2d3
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . . p . . 5
4 . . . . . k . . 4
3 . . . K . . . . 3
2 q . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 22 0 31 1438 1 f4e5
2 22 0 149 1442 3 a2a3
3 22 0 1388 1461 5 f4e5 d3c3 f5f4
4 22 0 1832 1466 6 f4e5 d3e3 f5f4 e3f3 (e6d5)
5 22 0 2854 19985 8 f4e5 d3e3 f5f4 e3d3 a2b3
nreps: 13
nhash: 243
hashorder: 244
razor: 38
prune: 168
hist: 12
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . k p . . 5
4 . . . . . . . . 4
3 . . . K . . . . 3
2 q . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: f4e5
plankton> d3c3
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . b . . . 6
5 . . . . k p . . 5
4 . . . . . . . . 4
3 . . K . . . . . 3
2 q . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 24 15 32 1461 2 f5f4
2 24 15 115 1511 3 a2e2
3 24 15 422 19995 3 e6c4 c3b4
nreps: 1
nhash: 153
hashorder: 32
razor: 0
prune: 82
hist: 9
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . . . . . 6
5 . . . . k p . . 5
4 . . b . . . . . 4
3 . . K . . . . . 3
2 q . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: e6c4
plankton> c3b4
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . . . . . 6
5 . . . . k p . . 5
4 . K b . . . . . 4
3 . . . . . . . . 3
2 q . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 26 0 35 1471 2 f5f4
2 26 0 107 19997 2 a2b3
nreps: 0
nhash: 2
hashorder: 20
razor: 5
prune: 0
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . . . . . 6
5 . . . . k p . . 5
4 . K b . . . . . 4
3 . q . . . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: a2b3, check!
plankton> b4a5
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . . . . . 6
5 K . . . k p . . 5
4 . . b . . . . . 4
3 . q . . . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
ply mv time nodes score pv
1 28 0 36 1479 2 f5f4
2 28 0 80 19999 2 b3b5
nreps: 0
nhash: 14
hashorder: 5
razor: 1
prune: 2
hist: 0
curo: 0
hash table usage: 0%
A B C D E F G H
8 . . . . . . . . 8
7 . . . . . . . . 7
6 . . . . . . . . 6
5 K q . . k p . . 5
4 . . b . . . . . 4
3 . . . . . . . . 3
2 . . . . . . . . 2
1 . . . . . . . . 1
A B C D E F G H
Computer's move: b3b5, check!
0-1 {Black mates}
plankton>
It seems like depending on what's in the HT it is struggling to make the fast mate. What can I do to avoid that?
Many thanks, Ian