-TC=4'+2"
-Hash=256 MB
-GUI: Arena 3.5.1
-Books: Perfect_2010.abk for both engines
-default settings for both engines
-1 thread-CPU=Intel i5-7400-3GHz (Kaby Lake)
-6-men Syzygy bases for both engines.
Clover 2.4 x64 has 3202 Elo points (CCRL 40/15) - still untested in CCRL Blitz (after about four months).
Zahak 7.1 x64 has 2964 Elo points (CCRL Blitz).
Zahak 8.0 x64 has 3133 Elo points (CCRL Blitz) - tested in maximum urgency (only some few days).
+12 -42 =46
-108 Elo points
A sample from this match:
[pgn]
[Event "NN Test158"]
[Site "ISR 3"]
[Date "2021.10.30"]
[Round "10"]
[White "Clover.2.4_x64_bmi2"]
[Black "Zahak-windows-amd64-8.0-avx"]
[Result "1-0"]
[BlackElo "2200"]
[ECO "B84"]
[Opening "Sicilian"]
[Time "20:48:19"]
[Variation "Scheveningen, Classical, 7.O-O Be7 8.f4"]
[WhiteElo "2200"]
[TimeControl "240+2"]
[Termination "adjudication"]
[PlyCount "74"]
[WhiteType "program"]
[BlackType "program"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Be7 8.
f4 e5 9. Nf5 {(Nd4-f5) +0.45/20 10} Bxf5 {(Bc8xf5 e4xf5 Nb8-c6 Kg1-h1 h7-h6
Nc3-d5 Nf6xd5 Qd1xd5 O-O c2-c3 Be7-f6 f4xe5 Bf6xe5 Bc1-e3 Nc6-e7 Qd5-e4
Qd8-c7 Qe4-c4 Qc7-d7 Qc4-e4 Ra8-e8 Ra1-d1) -0.19/21 8} 10. exf5 {(e4xf5 O-O
Kg1-h1 h7-h6 Be2-f3 Nb8-c6 Nc3-d5 Nf6xd5 Bf3xd5 Be7-f6 c2-c3 Qd8-b6 Qd1-b3
Qb6xb3 a2xb3 Rf8-b8 Rf1-e1 Nc6-e7 Bd5-e4 d6-d5 f4xe5 Bf6xe5 Be4xd5 Ne7xd5
Re1xe5 Rb8-d8) +0.42/24 9} Nc6 {(Nb8-c6 Kg1-h1 h7-h6 Be2-f3 O-O Nc3-d5
Nf6xd5 Bf3xd5 Be7-f6 f4xe5 d6xe5 c2-c3 Qd8-c7 Qd1-g4 Ra8-d8 Bd5-b3 Nc6-a5
Bc1xh6 Na5xb3 a2xb3 Qc7-b6 Ra1-d1) -0.18/21 8} 11. Kh1 {(Kg1-h1 Ra8-c8
Be2-f3 O-O g2-g4 e5xf4 g4-g5 Nf6-e8 h2-h4 h7-h6 Bf3xc6 Rc8xc6 g5xh6 Be7-f6
Qd1-g4 Bf6xc3 b2xc3 Rc6xc3 h6xg7 Ne8xg7 Rf1-g1 Rc3-g3 Rg1xg3 f4xg3)
+0.40/22 9} h6 {(h7-h6 Be2-f3 O-O Nc3-d5 Nf6xd5 Bf3xd5 Be7-f6 f4xe5 d6xe5
c2-c3 Qd8-c7 Qd1-g4 Ra8-d8 Bd5-b3 Kg8-h8 Qg4-e4 Nc6-a5 Bb3-d5 Qc7-b6 Rf1-d1
Rd8-e8 c3-c4) -0.28/22 9} 12. Bf3 {(Be2-f3 Qd8-d7 g2-g4 e5xf4 Bc1xf4 O-O
Nc3-d5 Ra8-d8 h2-h3 Nf6xd5 Bf3xd5 Be7-f6 c2-c3 Bf6-e5 Qd1-f3 Nc6-e7 Bf4xe5
d6xe5 Bd5-e4 Qd7-d2 f5-f6 Ne7-g6) +0.45/24 9} O-O {(O-O Nc3-d5 Nf6xd5
Bf3xd5 Ra8-b8 c2-c3 Be7-f6 Bc1-e3 Nc6-e7 Bd5-e4 d6-d5 f4xe5 Bf6xe5 Be4-c2
Qd8-d6 Qd1-h5 Qd6-c7 Ra1-e1 Rb8-e8 Be3-g1 b7-b5 Bc2-b3) -0.32/20 8} 13. Nd5
{(Nc3-d5 Nf6xd5 Bf3xd5 Be7-f6 c2-c3 e5xf4 Bc1xf4 Nc6-e7 Bd5-f3 Rf8-e8
Qd1-c2 Qd8-d7 g2-g4 Ne7-c6 Qc2-g2 Bf6-e5 Bf3-d5 Qd7-e7 Bf4xe5 Qe7xe5 Ra1-d1
Ra8-d8 Bd5xc6 b7xc6 Qg2xc6) +0.60/23 9} Re8 {(Rf8-e8 c2-c3 Nf6xd5 Bf3xd5
Be7-f6 f4xe5 Re8xe5 Bc1-f4 Re5-e7 h2-h3 Nc6-e5 Bf4-h2 Ra8-c8 Rf1-e1 Qd8-c7
Qd1-e2 b7-b5 Ra1-d1 Rc8-e8 Qe2-h5 Bf6-g5) -0.19/21 8} 14. fxe5 {(f4xe5
d6xe5 Nd5xf6+ Be7xf6 Bf3-e4 Qd8-b6 Qd1-g4 Kg8-h7 b2-b3 Re8-d8 c2-c4 a6-a5
Ra1-b1 a5-a4 Qg4-h5 Rd8-d7 Be4-d5 Kh7-g8 Bc1-a3 Nc6-b4 b3xa4 Ra8xa4 Rb1-b3
Ra4xa3 Rb3xa3 Nb4xd5 c4xd5 Rd7xd5) +0.46/24 9} dxe5 {(d6xe5 Nd5xf6+ Be7xf6
Bf3-e4 Bf6-g5 c2-c3 Qd8xd1 Rf1xd1 Re8-d8 Bc1xg5 h6xg5 a2-a4 Ra8-c8 b2-b4
g5-g4 a4-a5 Kg8-f8 Kh1-g1 f7-f6 h2-h3 g4xh3 g2xh3 Rd8xd1+ Ra1xd1 Kf8-e7
Kg1-f2) -0.40/21 10} 15. Nxf6+ {(Nd5xf6+) +0.43/25 8} Bxf6 {(Be7xf6 Bf3-e4
Qd8-c7 Qd1-g4 Kg8-h7 Bc1-e3 Ra8-d8 Ra1-d1 Nc6-a5 b2-b3 Na5-c6 c2-c4 Nc6-d4
h2-h3 Rd8-d7 Be4-d5 Re8-d8 Rd1-d2 Kh7-h8 Rf1-d1 Kh8-g8 Kh1-h2 Kg8-h8 Qg4-e4
Bf6-g5) -0.30/22 9} 16. Be4 {(Bf3-e4 Bf6-g5 Qd1-g4 Bg5xc1 Ra1xc1 Qd8-f6
Rc1-d1 Ra8-d8 c2-c3 Rd8xd1 Rf1xd1 Re8-d8 Rd1xd8+ Qf6xd8 h2-h3 Kg8-h7 Kh1-h2
f7-f6 Qg4-e2 a6-a5 a2-a4 Qd8-d7 b2-b3 Qd7-d6 Qe2-b5 Qd6-d2 Be4xc6 b7xc6
Qb5xc6 Qd2-c1) +0.44/28 8} Qc7 {(Qd8-c7 Qd1-g4 Kg8-h8 Bc1-e3 Ra8-d8 Ra1-d1
Nc6-e7 h2-h3 b7-b5 Qg4-f3 Kh8-g8 Be3-f2 Bf6-g5 c2-c3 Qc7-a5 a2-a3 Qa5-c7
Rd1xd8 Re8xd8 Rf1-d1 Rd8xd1+ Qf3xd1 Qc7-c4) -0.41/22 14} 17. Qg4 {(Qd1-g4)
+0.40/22 8} Kh7 {(Kg8-h7 Bc1-e3 Ra8-d8 Ra1-d1 Nc6-e7 Qg4-f3 Kh7-g8 c2-c3
Qc7-c4 a2-a3 Qc4-a2 Rd1-b1 b7-b5 Qf3-g4 Ne7-d5 Be3xh6 Qa2-c4 Rb1-d1 Nd5-f4
Rd1xd8) -0.37/21 8} 18. Be3 {(Bc1-e3) +0.45/24 8} Rad8 {(Ra8-d8 Ra1-d1
b7-b5 h2-h3 Nc6-e7 b2-b3 Qc7-a5 Kh1-h2 Rd8xd1 Rf1xd1 Qa5xa2 Rd1-d7 Qa2-a5
Be3-f2 Qa5-a1 h3-h4 Qa1-a3 Qg4-h5 Kh7-g8 Kh2-h3) -0.21/21 11} 19. Rfd1
{+0.51/25 7} Nd4 {(Nc6-d4 Ra1-c1 Nd4-b5 Be4-d5 Nb5-d4 c2-c4 Re8-e7 b2-b4
Qc7-d7 Qg4-e4 Kh7-g8 h2-h3 Bf6-g5 Be3xg5 h6xg5 Rd1-f1 Qd7-d6 Qe4-g4 Qd6-h6
Rc1-d1 Qh6-f6) -0.25/21 6} 20. Rac1 {(Ra1-c1 Qc7-a5 c2-c3 Nd4-b5 c3-c4
Rd8xd1+ Qg4xd1 Nb5-d4 a2-a3 Re8-e7 Qd1-d3 Re7-d7 Rc1-d1 Qa5-d8 b2-b4 Kh7-g8
Be3-g1 Bf6-g5 Be4-d5 Bg5-f6 Qd3-e4 b7-b5 h2-h3 a6-a5 h3-h4 a5xb4 a3xb4
b5xc4 Bd5xc4 Bf6xh4 Qe4xe5) +0.43/25 7} Qc4 {(Qc7-c4 c2-c3 Nd4-b5 Rd1xd8
Re8xd8 b2-b3 Qc4-c7 c3-c4 Nb5-d4 Be4-d5 Kh7-h8 Qg4-e4 Qc7-a5 Bd5xf7 Qa5xa2
Qe4xb7 Nd4xf5 Be3-b6 Qa2xb3 Qb7xa6) -0.23/21 22} 21. b3 {+0.61/24 7} Qc7
{(Qc4-c7 c2-c4 Re8-e7 Be4-d5 Re7-d7 h2-h3 Nd4-c6 Qg4-g3 Kh7-h8 Qg3-f2
Nc6-d4 Rd1-d3 Kh8-g8 g2-g4 a6-a5 Rc1-d1 b7-b5 Qf2-g2 b5xc4 b3xc4 Bf6-g5
Be3xd4) -0.18/21 8} 22. Bd2 {(Be3-d2 Nd4-b5 c2-c4 Nb5-d4 Be4-d5 Qc7-e7
Bd2-e3 Re8-f8 Rc1-b1 b7-b5 h2-h3 Qe7-a3 Rd1-d2 Qa3-a5 Rb1-d1 Qa5-c3 Rd2-d3
Qc3-c2 a2-a4 b5xa4 b3xa4 Qc2xa4 Qg4-h5 Kh7-g8) +0.63/23 7} Re7 {(Re8-e7
Bd2-e3 Re7-d7 c2-c3 Nd4-b5 c3-c4 Nb5-d4 b3-b4 a6-a5 b4-b5 Qc7-c5 Rd1-d3
a5-a4 h2-h3 Qc5-b4 Qg4-d1 Kh7-g8 Be3-d2 Qb4-b2 Bd2-a5 Nd4-e2 Ba5xd8 Rd7xd3)
-0.14/22 8} 23. Be1 {(Bd2-e1 Re7-d7 c2-c4 a6-a5 Be4-d5 Bf6-g5 Rc1-c3 Nd4-c2
Qg4-e2 Nc2xe1 Qe2xe1 Bg5-f6 Rc3-d3 Qc7-c5 h2-h3 Qc5-b6 Rd1-d2 Rd7-c7 h3-h4
Qb6-b4) +0.31/22 7} Red7 {(Re7-d7 c2-c3 Nd4-b5 Rd1xd7 Rd8xd7 c3-c4 Nb5-d6
Be4-b1 Nd6-b5 Bb1-e4) 0.00/21 5} 24. h3 {(h2-h3 Kh7-g8 c2-c3 Nd4-b5 c3-c4
Rd7xd1 Rc1xd1 Rd8xd1 Qg4xd1 Nb5-d6 Qd1-d5 Nd6xe4 Qd5xe4 Qc7-c6 Qe4xc6 b7xc6
g2-g4 e5-e4 Kh1-g2 h6-h5 Kg2-f1 h5xg4 h3xg4) +0.31/23 7} Qc5 {(Qc7-c5 c2-c3
Nd4-b5 c3-c4 Nb5-d6 Be4-d5 Bf6-g5 Rc1-b1 Nd6-e8 Qg4-f3 Qc5-c7 Rd1-d3 Ne8-f6
Rb1-d1 b7-b5 Be1-f2 Nf6xd5 Rd3xd5 Rd7xd5 c4xd5) -0.04/19 5} 25. a4 {(a2-a4
b7-b5 Be1-a5 Rd8-c8 a4xb5 Qc5xb5 b3-b4 Rc8-c3 Be4-d3 Qb5-b8 b4-b5 Rc3-c5
Ba5-b4 Rc5-c7 Rc1-b1 Nd4xb5 c2-c4 Rd7-d4 Qg4-g3 Rc7xc4 Bd3xc4 Rd4xc4 Rd1-d7
Nb5-d4 Qg3-e1 Nd4xf5) +0.21/25 7} Rd6 {(Rd7-d6 Rc1-b1 Qc5-a3 Rd1-d3 Rd8-d7
Qg4-d1 Nd4-c6 Rd3xd6 Rd7xd6 Qd1-h5 Kh7-g8 Rb1-d1 Nc6-d4 a4-a5 Nd4-c6 Be4xc6
b7xc6 Rd1xd6 Qa3xd6 Qh5-e2 c6-c5) -0.30/19 4} 26. Rb1 {(Rc1-b1) +0.90/21 6}
Qa3 {(Qc5-a3 Rb1-a1 Qa3-c5 Rd1-b1 Qc5-c7 c2-c3 Nd4-c6 b3-b4 Nc6-e7 Qg4-f3
Rd6-d7 a4-a5 Qc7-c4 b4-b5 Ne7-d5 b5-b6 Kh7-h8 Rb1-b2 Qc4-c8 Ra1-d1 Nd5-f4
Rd1xd7 Rd8xd7) -0.49/21 5} 27. Rd3 {(Rd1-d3 Kh7-g8 Rb1-d1 Nd4-c6 Rd3xd6
Rd8xd6 Qg4-e2 Rd6xd1 Qe2xd1 Qa3-b2 g2-g4 Nc6-d4 a4-a5 Qb2-a2 h3-h4 Bf6-d8
Qd1-d2 Qa2-b1 Kh1-h2 Bd8-c7 b3-b4 b7-b5 a5xb6/ep Bc7xb6) +0.95/25 7} Kg8
{(Kh7-g8 Kh1-h2 Kg8-h8 Rb1-d1 b7-b6 Be1-g3 Kh8-g8 Rd1-d2 b6-b5 a4xb5 Nd4xb5
Be4-d5 Nb5-d4 Bd5-c4 Qa3-c1 c2-c3 Nd4xb3 Rd2-d1 Rd6xd3) -0.28/19 5} 28.
Rbd1 {(Rb1-d1 Nd4-c6 Rd3xd6 Rd8xd6 Qg4-e2 Rd6-d4 c2-c3 Rd4xd1 Qe2xd1 Qa3-c5
Qd1-c2 h6-h5 g2-g3 h5-h4 Be1-f2 Qc5-a3 g3xh4 Qa3-e7 Be4xc6 b7xc6 Qc2-e4
Qe7-a3 Qe4-c4 Qa3-c1+ Kh1-g2 Qc1-c2 Qc4xc6 Qc2xb3 h4-h5) +0.95/26 6} b6
{(b7-b6 Kh1-h2 Kg8-h7 Be1-f2 Rd8-d7 Bf2-e3 Kh7-h8 Qg4-h5 Kh8-g8 Rd1-d2
Bf6-d8 Qh5-d1 Bd8-c7 g2-g3 b6-b5 f5-f6 g7xf6 Qd1-h5 Bc7-a5 Rd2-g2 f6-f5)
-0.62/20 10} 29. Kh2 {(Kh1-h2 Bf6-g5) +1.18/22 6} Kh8 {(Kg8-h8 Be1-f2
Bf6-g5 h3-h4 Bg5-f6 Rd1-d2 b6-b5 a4xb5 Nd4xb5 Be4-d5 Qa3-a5 Bd5xf7 Qa5xd2
Rd3xd2 Rd6xd2 Bf2-e3 Rd2xc2 Bf7-g6 a6-a5 Kh2-h3 Nb5-c3 Qg4-c4) -0.71/19 4}
30. Qh5 {(Qg4-h5 Kh8-g8 Be1-h4 Bf6xh4 Qh5xh4 Kg8-f8 Qh4-g4 Qa3-c5 Rd3-g3
Nd4xf5 b3-b4 Qc5xb4 Rd1xd6 Nf5xd6 Qg4xg7+ Kf8-e7 Qg7xe5+ Ke7-d7 Be4-f5+
Nd6xf5 Qe5xf5+ Kd7-c7 a4-a5 Qb4xa5 Qf5-f4+ Kc7-c6 Qf4xh6+ Rd8-d6 Qh6-f4
f7-f5 Rg3-g5 Qa5-c5 Rg5xf5 Qc5xc2 Qf4-e5 Qc2-c5) +1.19/24 6} Kg8 {(Kh8-g8
Be1-d2 Qa3-c5 Bd2-e3 Qc5-c7 b3-b4 Rd8-d7 Be3-f2 Bf6-g5 Kh2-h1 b6-b5 h3-h4
Bg5-f6 c2-c3 Nd4-b3 Rd3xd6 Rd7xd6 a4xb5 a6xb5 Rd1xd6 Qc7xd6) -0.98/18 4}
31. Bh4 {+1.36/24 5} Bxh4 {(Bf6xh4 Qh5xh4 Kg8-f8 c2-c3 Nd4xb3 Qh4xd8+
Rd6xd8 Rd3xd8+ Kf8-e7 Rd1-d7+ Ke7-f6 Be4-d5 e5-e4 Rd7xf7+ Kf6-e5 Rf7xg7
Nb3-d2 Rg7-h7 Ke5xf5 Rh7xh6 Qa3xc3 Rh6xb6 Nd2-f1+ Kh2-h1) -1.56/20 5} 32.
Qxh4 {(Qh5xh4 Qa3-b2) +2.17/26 8} b5 {(b6-b5 c2-c3 Nd4-c6 a4xb5 a6xb5
Qh4-g3 Rd6xd3 Rd1xd3 Rd8-d6 Be4xc6 Rd6xc6 Qg3xe5 Kg8-h7 Qe5xb5 Rc6-c5
Qb5-b4 Qa3xb4 c3xb4 Rc5xf5 Rd3-d7) -1.95/20 7} 33. Qe7 {(Qh4-e7 Qa3-b2
a4xb5 Rd6-d7 Qe7-h4 f7-f6 b5xa6 Rd8-c8 Qh4-g3 Rc8xc2 Rd3xd4 e5xd4 Qg3-b8+
Kg8-h7 a6-a7 Rd7xa7 Qb8xa7 Rc2-e2 Be4-d5 Qb2-c2 Rd1-f1 Re2-e5 Qa7xd4 Re5xf5
Qd4-e4 Qc2xe4 Bd5xe4) +3.84/23 5} bxa4 {(b5xa4 c2-c3 a4xb3 c3xd4 Qa3-a4
Rd3-g3 b3-b2 Qe7xe5 g7-g6 f5xg6 f7-f6 Qe5-h5 Kg8-g7 Be4-d3 Qa4xd4 Rd1-f1
Qd4-e5 Qh5xe5 f6xe5 Bd3-f5 Rd8-e8) -2.50/19 9} 34. f6 {+7.90/24 6} Qb2
{(Qa3-b2 c2-c3 Qb2-f2 Qe7xe5 a4xb3 Rd3xd4 g7xf6 Rd4xd6 f6xe5 Rd6xd8+ Kg8-g7
Be4-d5 b3-b2 Rd8-d7 Qf2-c2 Bd5xf7 Kg7-f8 Bf7-a2 e5-e4 Rd1-b1 Qc2xc3 Rd7-b7
Qc3-e5+ Kh2-g1 e4-e3 Rb1xb2 e3-e2) -2.13/21 6} 35. Bg6 {(Be4-g6) +12.77/24
7} Rf8 {(Rd8-f8 f6xg7 Kg8xg7 Qe7xd6 f7xg6 Qd6xe5+ Kg7-g8 Qe5xd4 Qb2xd4
Rd3xd4 a4xb3 c2xb3 Kg8-g7 Rd4-d7+ Kg7-f6 Rd1-d6+ Kf6-f5 Rd7-c7 Rf8-b8
Rc7-c5+ Kf5-e4 Rd6xg6 Rb8xb3 Rg6xh6) -9.26/19 5} 36. fxg7 {(f6xg7 Kg8xg7
Qe7xd6 f7xg6 Qd6xe5+ Kg7-h7 Rd3xd4 Rf8-f7 Qe5-e8 Rf7-a7 Rd4-d7+ Ra7xd7
Rd1xd7+ Qb2-g7 Rd7xg7+ Kh7xg7 Qe8-e7+ Kg7-g8 b3xa4 h6-h5 Kh2-g3 a6-a5
Kg3-f3 h5-h4 Kf3-g4 g6-g5 Qe7xg5+ Kg8-h7 Kg4xh4) +18.97/26 12} Kxg7
{(Kg8xg7 Qe7xd6 f7xg6 Qd6xe5+ Kg7-g8 Rd3xd4 Qb2-c3 Qe5-e6+ Kg8-h8 Qe6xg6
Qc3-c7+ Kh2-h1 Qc7-g7 Qg6xg7+ Kh8xg7 Rd4xa4 Rf8-f6 Kh1-h2 Kg7-f7 Rd1-d5
Rf6-c6 Ra4-c4 Rc6-f6 Kh2-g3 Kf7-e6 Rc4-d4 Rf6-f1 c2-c4) -13.42/20 10} 37.
Qxd6 {(Qe7xd6) +22.16/20 7} fxg6 {(f7xg6 Qd6xe5+ Kg7-g8 Rd3xd4 Qb2-c3
Qe5-e6+ Kg8-h8 Qe6xg6 Qc3-c7+ Kh2-h1 Qc7-h7 Qg6xh7+ Kh8xh7 Rd4xa4 Rf8-f6
Rd1-d7+ Kh7-g8 Kh1-h2 Kg8-f8 Kh2-g3 Rf6-g6+ Kg3-f3 Kf8-e8 Rd7-d5 Rg6-f6+
Kf3-e3 Rf6-g6 Ra4-e4+ Ke8-f7 Ke3-f3 Rg6-f6+ Kf3-e3 Rf6-b6) -14.17/20 7
Arena Adjudication} 1-0
[/pgn]