Atlas 4.25 Release

[Manza]

Hello all,

new version Atlas 4.25 available at https://sites.google.com/view/atlaschess/home/down.

A small summary of the changes:

* Total rewrite to add new features.
* Added SMP multiprocessor support.
* Added Sygygy endbase support.
* Improved time management.
* General re-testing of parameters in the evaluation.
* Elimination of the Razoring pruning technique (no gain).


My test at fast control (30s+0.3s) shows about 120 elo gain in self testing and about 100 elo gain against several engines, but it could be different at long time controls as usual.

Regards,

Andres Manzanares.
https://sites.google.com/view/atlaschess/home

[chessica]

[fen]6rk/1p1R3p/2n3p1/p7/8/P3Q3/1qP2PPP/4R1K1 w - - 0 1[/fen]


Atlas 4.25:
...
36/29 00:14 29.267k 2.086k +M9 1.De3-h6 Db2-g7 2.Td7xg7 Tg8xg7 3.Dh6-f4 h7-h5 4.Df4-h6+ Kh8-g8 5.Te1-e8+ Kg8-f7 6.Dh6-e3 Tg7-h7 7.De3-e6+ Kf7-g7 8.Te8-g8+ Kg7-h6 9.Tg8xg6+
37/29 00:23 48.021k 2.025k +M8 1.c2-c3 Tg8-f8 2.Kg1-h1 Db2-a1 3.Te1xa1 Kh8-g8 4.De3-h6 Tf8-f7 5.Ta1-e1 Tf7-e7 6.Te1xe7 Sc6xe7 7.Td7xe7 g6-g5 8.Dh6-g7+
38/29 00:26 53.281k 2.036k +M8 1.c2-c3 Tg8-f8 2.Kg1-h1 Db2-a1 3.Te1xa1 Kh8-g8 4.De3-h6 Tf8-f7 5.Ta1-e1 Tf7-e7 6.Te1xe7 Sc6xe7 7.Td7xe7 g6-g5 8.Dh6-g7+
39/29 00:30 61.941k 2.057k +M8 1.c2-c3 Tg8-f8 2.Kg1-h1 Db2-a1 3.Te1xa1 Kh8-g8 4.De3-h6 Tf8-f7 5.Ta1-e1 Tf7-e7 6.Te1xe7 Sc6xe7 7.Td7xe7 g6-g5 8.Dh6-g7+

[chessica]

[fen]N6k/8/8/8/8/8/8/K6B w - - 0 1[/fen]

Atlas 4.25: # in 30

Code: Select all

 42/49	00:32	 91.461k	2.817k	+7,58	1.Ka1-b2 Kh8-g7 2.Kb2-c3 Kg7-f6 3.Kc3-d4 Kf6-g5 4.Kd4-e5 Kg5-g6 5.Lh1-e4+ Kg6-h6 6.Sa8-c7 Kh6-g5 7.Le4-f3 Kg5-g6 8.Sc7-d5 Kg6-f7 9.Lf3-h5+ Kf7-g7 10.Sd5-f4 Kg7-h6 11.Ke5-f6 Kh6-h7 12.Lh5-g4 Kh7-g8 13.Lg4-f3 Kg8-h7 14.Sf4-e6 Kh7-h8 15.Se6-c7 Kh8-g8 16.Lf3-e4 Kg8-f8 17.Sc7-d5 Kf8-g8 18.Le4-f3 Kg8-h7 19.Lf3-h1 Kh7-h6 20.Lh1-e4 Kh6-h5 21.Sd5-f4+ Kh5-h6
 43/56	00:41	 118.676k	2.832k	+145,97	1.Ka1-b2 Kh8-g7 2.Kb2-c3 Kg7-f6 3.Kc3-d4 Kf6-g5 4.Kd4-e5 Kg5-g6 5.Lh1-e4+ Kg6-h6 6.Sa8-c7 Kh6-g5 7.Sc7-e6+ Kg5-h5 8.Ke5-f5 Kh5-h6 9.Kf5-f6 Kh6-h5 10.Se6-f4+ Kh5-g4 11.Sf4-d3 Kg4-h4 12.Le4-f3 Kh4-g3 13.Lf3-h5 Kg3-h4 14.Kf6-g6 Kh4-g3 15.Kg6-f5 Kg3-h4 16.Lh5-f3 Kh4-g3 17.Kf5-e4 Kg3-h4 18.Ke4-f4 Kh4-h3 19.Sd3-e5 Kh3-h2 20.Lf3-a8 Kh2-h3 21.La8-c6 Kh3-h2 22.Lc6-e8
 44/60	00:49	 142.618k	2.853k	+156,77	1.Ka1-b2 Kh8-g7 2.Kb2-c3 Kg7-f6 3.Kc3-d4 Kf6-f5 4.Sa8-c7 Kf5-f6 5.Lh1-f3 Kf6-f5 6.Lf3-d5 Kf5-f6 7.Kd4-e4 Kf6-g6 8.Ke4-e5 Kg6-g7 9.Ld5-f3 Kg7-g6 10.Sc7-d5 Kg6-f7 11.Lf3-h5+ Kf7-g7 12.Ke5-e6 Kg7-h6 13.Lh5-f3 Kh6-g5 14.Lf3-e4 Kg5-h4 15.Ke6-f5 Kh4-h5 16.Kf5-f6 Kh5-g4 17.Kf6-e5 Kg4-h5 18.Sd5-b4 Kh5-g5 19.Sb4-d3 Kg5-h5 20.Ke5-f6 Kh5-h6 21.Le4-f3 Kh6-h7 22.Sd3-e5 Kh7-h8
 45/60	01:27	 252.068k	2.877k	+156,39	1.Ka1-b2 Kh8-g7 2.Kb2-c3 Kg7-f7 3.Kc3-d4 Kf7-f6 4.Sa8-b6 Kf6-f5 5.Lh1-d5 Kf5-f6 6.Kd4-e4 Kf6-g5 7.Ke4-e5 Kg5-g6 8.Sb6-a8 Kg6-g7 9.Ke5-f5 Kg7-h7 10.Kf5-f6 Kh7-h8 11.Kf6-f7 Kh8-h7 12.Sa8-c7 Kh7-h8 13.Ld5-f3 Kh8-h7 14.Lf3-h1 Kh7-h6 15.Kf7-f6 Kh6-h7 16.Sc7-d5 Kh7-g8 17.Lh1-f3 Kg8-f8 18.Sd5-f4 Kf8-e8 19.Lf3-c6+ Ke8-f8 20.Sf4-e6+ Kf8-g8 21.Lc6-d5 Kg8-h8 22.Kf6-f7 Kh8-h7 23.Ld5-f3
 46/60	01:46	 307.869k	2.895k	+156,85	1.Ka1-b2 Kh8-g7 2.Lh1-d5 Kg7-h7 3.Kb2-c3 Kh7-g7 4.Sa8-b6 Kg7-g6 5.Sb6-d7 Kg6-h5 6.Kc3-d4 Kh5-g5 7.Kd4-e5 Kg5-g6 8.Ld5-b3 Kg6-g7 9.Ke5-f5 Kg7-h7 10.Lb3-e6 Kh7-g7 11.Le6-d5 Kg7-h8 12.Kf5-f6 Kh8-h7 13.Ld5-c4 Kh7-h6 14.Lc4-d3 Kh6-h5 15.Ld3-f5 Kh5-h4 16.Kf6-e5 Kh4-h5 17.Sd7-b6 Kh5-h6 18.Ke5-f6 Kh6-h5 19.Sb6-a8 Kh5-h4 20.Sa8-c7 Kh4-g3 21.Kf6-e5 Kg3-f3 22.Ke5-d4 Kf3-f4 23.Lf5-d3 Kf4-g4
 47/60	01:56	 338.763k	2.907k	+156,77	1.Ka1-b2 Kh8-g7 2.Lh1-d5 Kg7-h7 3.Kb2-c3 Kh7-g7 4.Sa8-b6 Kg7-g6 5.Sb6-d7 Kg6-h5 6.Kc3-d4 Kh5-g5 7.Kd4-e5 Kg5-g6 8.Ld5-b3 Kg6-g7 9.Ke5-f5 Kg7-h7 10.Kf5-f6 Kh7-h8 11.Lb3-d5 Kh8-h7 12.Sd7-e5 Kh7-h8 13.Ld5-e4 Kh8-g8 14.Se5-g6 Kg8-h7 15.Le4-d5 Kh7-h6 16.Sg6-f8 Kh6-h5 17.Sf8-d7 Kh5-h4 18.Kf6-e5 Kh4-g5 19.Ld5-e4 Kg5-g4 20.Sd7-c5 Kg4-g3 21.Sc5-e6 Kg3-g4 22.Se6-c7 Kg4-g3 23.Ke5-d4 Kg3-g4
 48/60	02:11	 382.949k	2.907k	+157,19	1.Ka1-b2 Kh8-g7 2.Lh1-d5 Kg7-h7 3.Kb2-c3 Kh7-g6 4.Sa8-b6 Kg6-g7 5.Sb6-d7 Kg7-h6 6.Kc3-d3 Kh6-g6 7.Kd3-e4 Kg6-g5 8.Ld5-e6 Kg5-g6 9.Ke4-e5 Kg6-g7 10.Ke5-f5 Kg7-h7 11.Kf5-f6 Kh7-h8 12.Sd7-e5 Kh8-h7 13.Le6-d5 Kh7-h8 14.Ld5-e4 Kh8-g8 15.Se5-f7 Kg8-f8 16.Le4-h7 Kf8-e8 17.Sf7-e5 Ke8-d8 18.Lh7-e4 Kd8-c7 19.Se5-c4 Kc7-d7 20.Kf6-f7 Kd7-d8 21.Kf7-e6 Kd8-e8 22.Le4-d5 Ke8-f8 23.Ke6-f6 Kf8-e8 24.Sc4-e5 Ke8-d8
 49/60	02:30	 439.771k	2.913k	+M102	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Sa8-b6 Kg6-f6 4.Kc3-d4 Kf6-f5 5.Lh1-d5 Kf5-f6 6.Sb6-c4 Kf6-f5 7.Sc4-d6+ Kf5-f6 8.Kd4-e4 Kf6-g7 9.Ke4-e5 Kg7-g6 10.Ld5-h1 Kg6-g7 11.Lh1-e4 Kg7-g8 12.Ke5-f6 Kg8-f8 13.Sd6-f7 Kf8-g8 14.Le4-f5 Kg8-f8 15.Lf5-h7 Kf8-e8 16.Sf7-e5 Ke8-d8 17.Lh7-e4 Kd8-c7 18.Se5-c4 Kc7-d7 19.Le4-d5 Kd7-d8 20.Ld5-h1 Kd8-d7 21.Lh1-e4 Kd7-d8 22.Kf6-e6 Kd8-e8 23.Le4-d5 Ke8-f8 24.Ke6-f6 Kf8-e8 25.Sc4-b6
 50/60	02:57	 514.821k	2.903k	+M94	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Sa8-b6 Kg6-f6 4.Kc3-d4 Kf6-f5 5.Lh1-d5 Kf5-f6 6.Kd4-e4 Kf6-g6 7.Sb6-c4 Kg6-f6 8.Sc4-d6 Kf6-g5 9.Ke4-e5 Kg5-g6 10.Sd6-f7 Kg6-g7 11.Ke5-f5 Kg7-h7 12.Kf5-f6 Kh7-g8 13.Sf7-e5+ Kg8-h8 14.Se5-g6+ Kh8-h7 15.Ld5-h1 Kh7-h6 16.Lh1-f3 Kh6-h7 17.Lf3-d5 Kh7-h6 18.Ld5-g8 Kh6-h5 19.Sg6-e5 Kh5-h4 20.Se5-d3 Kh4-g3 21.Lg8-d5 Kg3-g4 22.Ld5-a8 Kg4-h4 23.La8-e4 Kh4-g4 24.Le4-d5 Kg4-h4 25.Kf6-f5 Kh4-h5
 51/60	03:10	 551.013k	2.899k	+M79	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f5 4.Lh1-d5 Kf5-f6 5.Sa8-b6 Kf6-f5 6.Sb6-d7 Kf5-g5 7.Kd4-e4 Kg5-g6 8.Ke4-e5 Kg6-g7 9.Ke5-f5 Kg7-h6 10.Kf5-f6 Kh6-h7 11.Sd7-e5 Kh7-h8 12.Se5-g6+ Kh8-h7 13.Ld5-f7 Kh7-h6 14.Lf7-g8 Kh6-h5 15.Sg6-e5 Kh5-h6 16.Se5-c4 Kh6-h5 17.Lg8-e6 Kh5-h4 18.Le6-f5 Kh4-g3 19.Kf6-g5 Kg3-f3 20.Lf5-c2 Kf3-f2 21.Kg5-g4 Kf2-e1 22.Kg4-f5 Ke1-f2 23.Lc2-d1 Kf2-g3 24.Kf5-g5 Kg3-g2 25.Kg5-f4 Kg2-h2 26.Ld1-f3
 52/60	03:19	 576.344k	2.894k	+M60	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f6 4.Lh1-d5 Kf6-f5 5.Sa8-b6 Kf5-f6 6.Kd4-e4 Kf6-g5 7.Ke4-e5 Kg5-g6 8.Sb6-d7 Kg6-g7 9.Ke5-f5 Kg7-h6 10.Kf5-f6 Kh6-h7 11.Sd7-e5 Kh7-h8 12.Se5-g6+ Kh8-h7 13.Ld5-f7 Kh7-h6 14.Lf7-g8 Kh6-h5 15.Sg6-e5 Kh5-h6 16.Se5-c4 Kh6-h5 17.Lg8-e6 Kh5-h4 18.Le6-f5 Kh4-h5 19.Sc4-d6 Kh5-h4 20.Kf6-e5 Kh4-g3 21.Ke5-e4 Kg3-h4 22.Sd6-f7 Kh4-g3 23.Ke4-e3 Kg3-h4 24.Ke3-f4 Kh4-h5 25.Lf5-e4 Kh5-h4 26.Le4-f3 Kh4-h3
 53/60	03:25	 593.409k	2.892k	+M56	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f6 4.Lh1-d5 Kf6-f5 5.Sa8-b6 Kf5-f6 6.Kd4-e4 Kf6-g5 7.Ke4-e5 Kg5-g6 8.Sb6-d7 Kg6-g7 9.Ke5-f5 Kg7-h6 10.Kf5-f6 Kh6-h7 11.Sd7-e5 Kh7-h8 12.Se5-g6+ Kh8-h7 13.Ld5-f7 Kh7-h6 14.Lf7-g8 Kh6-h5 15.Sg6-e5 Kh5-h6 16.Se5-f7+ Kh6-h5 17.Kf6-f5 Kh5-h4 18.Kf5-f4 Kh4-h3 19.Sf7-e5 Kh3-h4 20.Lg8-f7 Kh4-h3 21.Lf7-d5 Kh3-h2 22.Ld5-e4 Kh2-h3 23.Le4-c6 Kh3-h2 24.Lc6-f3 Kh2-g1 25.Se5-c4 Kg1-f2 26.Kf4-e4
 54/60	03:36	 623.748k	2.886k	+M52	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f6 4.Lh1-d5 Kf6-f5 5.Sa8-b6 Kf5-f6 6.Kd4-e4 Kf6-g5 7.Ke4-e5 Kg5-g6 8.Sb6-c4 Kg6-g7 9.Ke5-f5 Kg7-h6 10.Kf5-f6 Kh6-h7 11.Sc4-e5 Kh7-h8 12.Se5-g6+ Kh8-h7 13.Ld5-f7 Kh7-h6 14.Lf7-g8 Kh6-h5 15.Sg6-e5 Kh5-h4 16.Kf6-f5 Kh4-g3 17.Lg8-b3 Kg3-f2 18.Se5-c4 Kf2-e1 19.Lb3-c2 Ke1-e2 20.Kf5-f4 Ke2-f1 21.Lc2-d1 Kf1-e1 22.Ld1-f3 Ke1-f2 23.Sc4-e5 Kf2-g1 24.Kf4-e3 Kg1-f1 25.Se5-g6 Kf1-e1 26.Lf3-h5 Ke1-f1 27.Sg6-h4
 55/63	05:00	 856.846k	2.855k	+M35	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f5 4.Lh1-d5 Kf5-f6 5.Sa8-b6 Kf6-f5 6.Sb6-d7 Kf5-g6 7.Kd4-e5 Kg6-g7 8.Ke5-f5 Kg7-h8 9.Kf5-f6 Kh8-h7 10.Sd7-e5 Kh7-h8 11.Se5-g6+ Kh8-h7 12.Ld5-b3 Kh7-h6 13.Lb3-g8 Kh6-h5 14.Sg6-e5 Kh5-h4 15.Kf6-f5 Kh4-g3 16.Se5-g4 Kg3-g2 17.Lg8-c4 Kg2-f3 18.Lc4-f1 Kf3-g3 19.Lf1-e2 Kg3-h4 20.Le2-f3 Kh4-g3 21.Sg4-e5 Kg3-f2 22.Kf5-f4 Kf2-e1 23.Kf4-e3 Ke1-f1 24.Se5-d7 Kf1-e1 25.Sd7-f8 Ke1-f1 26.Sf8-g6 Kf1-e1 27.Sg6-f4 Ke1-f1
 56/63	06:35	 1.121.499k	2.835k	+M38	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f5 4.Lh1-d5 Kf5-f6 5.Sa8-b6 Kf6-g7 6.Kd4-e5 Kg7-g6 7.Sb6-c4 Kg6-g7 8.Ke5-f5 Kg7-h6 9.Sc4-e5 Kh6-h7 10.Kf5-f6 Kh7-h8 11.Kf6-f7 Kh8-h7 12.Ld5-f3 Kh7-h8 13.Kf7-f8 Kh8-h7 14.Lf3-e4+ Kh7-h6 15.Se5-f3 Kh6-h5 16.Le4-f5 Kh5-h6 17.Kf8-f7 Kh6-h5 18.Kf7-f6 Kh5-h6 19.Sf3-e5 Kh6-h5 20.Lf5-e4 Kh5-h6 21.Se5-g4+ Kh6-h5 22.Kf6-f5 Kh5-h4 23.Le4-f3 Kh4-g3 24.Sg4-e5 Kg3-h3 25.Kf5-f4 Kh3-h2 26.Kf4-g4 Kh2-g1 27.Kg4-g3 Kg1-f1 28.Se5-d3 Kf1-g1
 57/63	07:55	 1.342.213k	2.823k	+M38	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f5 4.Lh1-d5 Kf5-f6 5.Sa8-b6 Kf6-f5 6.Sb6-d7 Kf5-g5 7.Kd4-e5 Kg5-g6 8.Ld5-c4 Kg6-g7 9.Ke5-f5 Kg7-h6 10.Kf5-f6 Kh6-h7 11.Sd7-e5 Kh7-h8 12.Se5-g6+ Kh8-h7 13.Lc4-d5 Kh7-h6 14.Ld5-g8 Kh6-h5 15.Sg6-e5 Kh5-h4 16.Kf6-f5 Kh4-g3 17.Se5-g4 Kg3-g2 18.Lg8-c4 Kg2-f3 19.Lc4-f1 Kf3-g3 20.Lf1-e2 Kg3-h4 21.Le2-f3 Kh4-g3 22.Sg4-e5 Kg3-f2 23.Kf5-f4 Kf2-e1 24.Kf4-e3 Ke1-f1 25.Se5-d3 Kf1-g1 26.Sd3-f4 Kg1-h2 27.Sf4-g2 Kh2-g1 28.Ke3-e2 Kg1-h2 29.Ke2-f2
 58/63	08:41	 1.469.385k	2.817k	+M36	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-f6 4.Kd4-d5 Kf6-f5 5.Lh1-e4+ Kf5-f6 6.Sa8-b6 Kf6-f7 7.Kd5-e5 Kf7-g7 8.Ke5-e6 Kg7-g8 9.Ke6-f6 Kg8-h8 10.Sb6-c4 Kh8-g8 11.Sc4-e5 Kg8-h8 12.Le4-d5 Kh8-h7 13.Se5-g6 Kh7-h6 14.Ld5-g8 Kh6-h5 15.Sg6-e5 Kh5-h4 16.Kf6-f5 Kh4-g3 17.Se5-g4 Kg3-g2 18.Lg8-c4 Kg2-f3 19.Lc4-b5 Kf3-g3 20.Lb5-c6 Kg3-h3 21.Kf5-f4 Kh3-h4 22.Lc6-b5 Kh4-h5 23.Lb5-e8+ Kh5-h4 24.Sg4-e3 Kh4-h3 25.Le8-c6 Kh3-h4 26.Lc6-f3 Kh4-h3 27.Lf3-g4+ Kh3-h2 28.Lg4-d7 Kh2-g1 29.Kf4-g3 Kg1-h1
 59/66	17:27	 2.903.328k	2.772k	+M34	1.Ka1-b2 Kh8-h7 2.Kb2-c3 Kh7-g6 3.Kc3-d4 Kg6-g5 4.Kd4-e5 Kg5-g6 5.Lh1-e4+ Kg6-g7 6.Ke5-e6 Kg7-f8 7.Ke6-f6 Kf8-g8 8.Sa8-b6 Kg8-h8 9.Le4-d5 Kh8-h7 10.Sb6-c4 Kh7-h8 11.Sc4-e5 Kh8-h7 12.Se5-g6 Kh7-h6 13.Ld5-g8 Kh6-h5 14.Sg6-e5 Kh5-h4 15.Lg8-d5 Kh4-h5 16.Ld5-e4 Kh5-h6 17.Se5-g4+ Kh6-h5 18.Kf6-f5 Kh5-h4 19.Le4-c6 Kh4-g3 20.Kf5-g5 Kg3-h3 21.Kg5-f4 Kh3-h4 22.Lc6-b5 Kh4-h5 23.Lb5-e8+ Kh5-h4 24.Sg4-e3 Kh4-h3 25.Le8-b5 Kh3-h2 26.Lb5-d7 Kh2-g1 27.Kf4-g3 Kg1-h1 28.Ld7-b5 Kh1-g1 29.Lb5-e2 Kg1-h1

[Manza]

Thank you chessica.

I appreciate all the information to continue improving my engine.

Andres Manzanares.

[Graham Banks]

Thanks, Andres.

[Gabor Szots]

Nice surprise. Welcome back, Andrés.

[Wolfgang]

CEGT 40/4 running
https://cegt.forumieren.com/t1791-testi ... -4-25#3393

[chessica]

ERET test by Walter Eigenmann, 111 test positions, 15 seconds per position. Analysis finished normally. 21 of 111 moves found Score time: 23:35