Author: Eelco de Groot
Date: 20:22:22 07/30/03
It probably isn't very good. I wanted to see how BETA9 would react to some further changes and threw Ed's implementation of Singular Extensions [Pruning = MISC_12] in the brew as well. This gives a poor branching factor especially if you go a little deeper. Not exactly an exploding tree but it can slow things down. I haven't seen much postions where it might have an effect but there probably aren't that many positions in an average game, where singular extensions could find something useful. But the playing style does not seem to bad. I don't go for many games, I usually stick to just one testposition to speed things up a bit :) This works wonders. BETA9 is often faster to play a key move but not everywhere, mainly I think because I also use a risky Selective Search = 130, among several other severely undertested value changes, leading to: ------------------------------------------------------------- [Personality = BETAZOID.ENG] * Rebel 12 (beta-9) further positional tuning [Pawn Value = 100] [Knight Value = 100] [Bishop Value = 100] [Rook Value = 100] [Queen Value = 95] [King Safety = 125] [Mobility = 90] [Pawn Structure = 100] [Passed Pawns = 100] [Pins = 100] [Bishop Pair = 100] [Chess Knowledge = 200] [Attractiveness = 135] [Attacking = 130] [Strength of Play = 100] [Draw Contempt Factor = 0.00] [Selective Search = 130] [Search Technique = NULLMOVE] [Pruning = MISC_25] [Pruning = MISC_37] [Pruning = MISC_40] [Pruning = MISC_09] [Pruning = MISC_10] [Pruning = MISC09_2.00] [Pruning = MISC10_4.00] [Pruning = MISC_12] [ANTI-GM = OFF] [EVALUATION = SMART] [Extensions (remaining)= 3] [Extensions (checks)= 0] [Extensions (captures)= 0] ------------------------------------------------------------- An example to show that the variations from BETAZOID do not awfully differ much from BETA9; a position from a recent game played by Judit Polgar. For the analysis by Judit see NIC Magazine 2003 nr. 5 p.21-24 Tournament: Enghien les Bains 2003 Round: 4 Date: before 31/7/2003 White: Judit Polgar Black: Joel Lautier Opening: B33 Sicilian: Sveshnikov Variation White ELO: 2715 Black ELO: 2666 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5 11. Bd3 Be6 12. Qh5 Rg8 13. g3 Rg5 14. Qd1 Bxd5 15. exd5 Ne7 16. c3 Bh6 17. Be2 Rc8 18. c4 f4 19. cxb5 e4 20. gxf4 Qa5+ 21. Kf1 Rxd5 22. Qe1 Qc7 23. bxa6 Qd7 24. Rg1 Qh3+ 25. Rg2 Bxf4 26. Qb4 Bxh2 27. Bg4 Qd3+ 28. Be2 Qh3 29. Bg4 Qd3+ 30. Ke1 Nc6 31. Qb7 Qd2+ 32. Kf1 Qd3+ 33. Be2 Qh3 34. Rc1 Rg5 35. Bg4 Qd3+ 36. Ke1 e3 37. Bd7+ Ke7 38. Bf5+ 1-0 After 23..., Qd7: [D]2r1k3/3qnp1p/P2p3b/3r4/4pP2/N7/PP2BP1P/R3QK1R w - - 1 1 Judit writes here: 24.Rg1! "With this move I am defending and attacking at the same time. I am defending against Qh3 check, while at the same time the rook takes the open file, after which Bg4 may also become a threat one day." The computer however thinks it has something even better than 24.Rg1, namely 24.h2-h3. I don't know if this will bear out after further analysis. What do other programs think? BETA9 gives 00:00:00.7 0,48 1 57 Nc4 Qh3+ Kg1 Bxf4 00:00:00.8 0,71 1 305 Qb4 Qh3+ Kg1 00:00:00.8 0,72 1 367 Rg1 Qh3+ Rg2 Bxf4 00:00:00.8 0,89 2 613 Rg1 Bxf4 00:00:01.0 0,72 3 1200 Rg1 Qh3+ 00:00:01.2 1,34 4 8624 Rg1 Qh3+ 00:00:01.4 1,17 5 18001 Rg1 Bxf4 Bg4 00:00:01.8 1,17 6 45017 Rg1 Bxf4 Bg4 00:00:03.0 1,30 7 148864 Rg1 Bxf4 Bg4 00:00:05.5 0,94 8 312089 Rg1 Bxf4 Bg4 00:00:13.6 1,42 8 946270 h3 Kf8 Nc4 00:00:32.0 1,45 9 2267686 h3 Kf8 Nc4 00:01:10.0 1,37 10 5203421 h3 Bg7 Nc4 Bd4 Qb4 Rdc5 Rd1 Nc6 00:03:25.3 1,55 11 17793212 h3 Kf8 Qb4 Rdc5 Qxe4 Bg7 b4 f5 00:09:17.8 1,65 12 51383867 h3 Kf8 Qb4 Qc6 Re1 f5 Rg1 00:25:40.7 1,67 13 145227447 h3 Kf8 Qb4 Bg7 01:05:40.0 1,54 14 398438588 h3 Kf8 Nc4 Rebel Betazoid, -named thus because it tries to telempathize what the opponent is thinking, before it is even thinking it!-, gives: 00:00:01.3 0,52 1 57 Nc4 Qh3+ Kg1 Bxf4 00:00:01.3 1,07 1 253 Bc4 Qh3+ Kg1 00:00:01.3 0,00 2 460 Bc4 Qh3+ Kg1 Qg4+ Kf1 Qh3+ 00:00:01.4 0,39 2 589 h3 Bxf4 00:00:01.4 0,89 2 1323 Rg1 Rdc5 00:00:01.5 0,77 3 1855 Rg1 Qh3+ 00:00:01.7 0,79 3 2607 Qb4 Qh3+ Kg1 00:00:02.2 0,69 4 7791 Qb4 Qh3+ Kg1 Bg7 Bb5+ Kf8 00:00:02.2 0,69 4 8995 Rg1 00:00:02.3 1,25 4 11404 Rg1 Qh3+ 00:00:02.4 1,27 5 20258 Rg1 Rdc5 Bg4 f5 Bh5+ Kd8 00:00:03.0 1,35 6 65357 Rg1 Bxf4 Bg4 00:00:03.7 1,35 7 123605 Rg1 Bxf4 Bg4 00:00:07.2 1,24 8 367157 Rg1 Bxf4 Bg4 00:00:13.5 1,31 8 846922 h3 Bg7 Qb4 Kf8 00:00:43.0 1,45 9 2921023 h3 Bg7 Nc4 Bd4 Qb4 Rdc5 Rd1 Nf5 00:02:01.7 1,56 10 8692790 h3 Bg7 Nc4 Rb8 f3 Bxb2 fxe4 Bxa1 00:07:30.4 1,55 11 35475635 h3 Kf8 Qb4 f5 00:18:18.0 1,76 12 93555118 h3 Kf8 Qb4 Qc6 Re1 Rd2 Rg1 Bxf4
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