Mat in .... ?

[syzygy]

28 26:13 9.194.233,873 5.843 +M13 a2a3 d3d4 c8d8 d4c4 a3e3 h2g1 d8c8 c4b4 a6a5 b4a5 e3b3 g1a7 c8a8 a5a6 a8a7 a6a7 g5g4 a4a5 g4g3 a7a8 g3g2 a8a7 g2g1q a7a6 g1g2 a6a7 g2b7

Given that the mate-in-14 lines have Ke2 as black's first reply instead of Kd4, it would be interesting to know how Baron finds a mate in 12 after Ra3+ Ke2. (If it does not, the reported mate in 13 is incorrect.)

I can confirm that the position after Ra3 Kd4 is mate in 12. But my engine only finds mate in 14 in the starting position.

Here is:

FEN: 2r5/8/p3p3/4Pkp1/P7/r3R3/4K2B/8 b - - 2 61

(...)
17 00:10 58.897.552 2.560.763 +M12 c8c2 e2d1 a3e3 d1c2 e3e2 c2c3 e2h2 a4a5 f5e5 c3d3 g5g4 d3e3 h2h3 e3f2 e5f4 f2e2 g4g3 e2d1 h3h2 d1e1 h2f2 e1d1 g3g2 d1e1 g2g1q

This line has 13 moves by white, so +M13 seems more appropriate? (Which would mean +M14 for the initial position.)

Now that I'm counting anyway, the first line has 14 moves by white.

[rodolfoleoni]

Found a bug in the Baron. Following the PV, it announces Mate in 1 when it's in 2. That explain all.

OK, some more work for Richard to fix it...

[kgburcham]

[D] 2r5/8/p3p3/4Pkp1/P7/3KR3/r6B/8 b - -

Rybka

21.01 0:06 -M16 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (6.993.744) 1096
22.01 0:06 -M15 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (7.460.269) 1080
23.01 0:07 -M14 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (8.156.851) 1031
24.01 0:09 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (9.439.572) 991
25.01 0:10 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (10.110.264) 965
26.01 0:11 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (10.770.798) 945
27.01 0:13 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (12.011.224) 909
28.01 0:19 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (14.907.605) 778
29.01 0:26 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (18.361.009) 702
30.01 0:32 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (21.425.922) 667
31.01 0:43 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (26.375.399) 607
32.01 0:51 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (31.499.315) 609
32.14 0:53 -M12 1...Rxh2 2.Re1 Rh3+ 3.Kd2 g4 (32.872.857) 612

I think Rybka is ill.

It gets better

Rybka

1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 Rd2+
-+ (-#12) Depth: 22 00:00:06 4385kN, tb=2365
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 Rd2+
-+ (-#12) Depth: 23 00:00:08 5075kN, tb=2774
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 Rh3+
-+ (-#12) Depth: 24 00:00:10 5684kN, tb=3356
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 Rh3+
-+ (-#12) Depth: 25 00:00:11 6315kN, tb=3872
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 e5
-+ (-#11) Depth: 26 00:00:14 8150kN, tb=5295
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 e5
-+ (-#11) Depth: 27 00:00:16 8891kN, tb=5480
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 e5
-+ (-#11) Depth: 28 00:00:17 9984kN, tb=5731
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 e5 5.Re2 Rxe2
-+ (-#11) Depth: 29 00:00:19 11116kN, tb=5952
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 e5 5.Re2 Rxe2
-+ (-#11) Depth: 30 00:00:22 13332kN, tb=6595
1...Rxh2 2.Rf3+ Kxe5[] 3.Re3+ Kd5[] 4.Re4 e5 5.Re2 Rxe2
-+ (-#11) Depth: 31 00:00:27 16801kN, tb=7593
1...Rxh2 2.Rf3+ Kxe5 3.Re3+ Kd5[] 4.Re4 e5 5.Re2 Rxe2
-+ (-#11) Depth: 32 00:00:33 21211kN, tb=9010
1...Rxh2 2.Rf3+ Kxe5 3.Re3+ Kd5[] 4.Re4 e5 5.Re2 Rxe2
-+ (-#11) Depth: 33 00:00:43 27272kN, tb=11967
1...Rxh2 2.Rf3+ Kxe5 3.Re3+ Kd5[] 4.Re4 e5 5.Re2 Rxe2
-+ (-#11) Depth: 34 00:00:53 33362kN, tb=14141
1...Rxh2 2.Rf3+ Kxe5 3.Re3+ Kd5[] 4.Re4 e5 5.Re2 Rxe2 6.Kxe2 Ke4 7.Kf2 g4 8.Kg3 Rc2 9.Kh4 Kf4 10.Kh5 Rc6 11.Kh4 Rh6#
-+ (-#11) Depth: 35 00:01:07 41191kN, tb=17960

[zullil]

Here is a position from a Amateur playoff game between Delphil 2.9a and Exchess 6.30b.

Exchess to move and Delphil is Mat in ?

[D]2r5/8/p3p3/4Pkp1/P7/3KR3/r6B/8 b - - 0 60


Cheers,

Gab

Critter-1.6a appears to have found a mate-in-13 using MultiPV=3:

Code: Select all

33/74  27:43   16593M   9975K   +M13 Rxh2 Re1 Rcc2 Ke3 Rcd2 a5 Rhf2 Rf1 Rxf1 Kxd2 g4 Ke2 Rf3 Kd2 g3 Ke2 Kf4 Kd2 g2 Kc2 g1=Q Kb2 Qg2+ Kc1 Rf1#

33/74  27:43   16593M   9975K   +M14 Ra3+ Kd4 Rd8+ Kc4 Rxe3 Bg1 Rc8+ Kb4 Rxe5 Kb3 g4 Ka3 g3 Kb3 g2 Bd4 a5 Bg1 Re2 Bd4 Rec2 Bb2 g1=Q Ka3 Qb1 Bd4 Qa2#

33/74  27:43   16593M   9975K   +M16 Rd8+ Kc4 Rxh2 Kb4 g4 Ka5 Kf4 Rb3 g3 Rb4+ Kxe5 Rb1 g2 Rg1 Rg8 Re1+ Kf6 Rg1 Rh1 Rxg2 Rxg2 Kb6 Rb2+ Kc5 Rc1+ Kd4 Rb3 a5 Rcc3 Ke4 Rb4#

[Dicaste]

Houdini 2.0c Pro x64 w/ Tablebases (Including Gaviota & Nalimov)

Code: Select all

New game
2r5/8/p3p3/4Pkp1/P7/3KR3/r6B/8 b - - 0 1

Analysis by Houdini 2.0c Pro x64:

60...Rxh2 61.Rf3+ Kxe5 62.Re3+ Kf6 63.Rf3+ Kg6 64.Rg3 Rh4 
  -+  (-7.14)   Depth: 7/17   00:00:00  5kN
60...Rxh2 61.Rf3+ Kxe5 62.Re3+ Kf6 63.Rf3+ Kg6 64.Rg3 Ra2 65.Rg4 Ra3+ 66.Kd2 
  -+  (-7.26)   Depth: 8/18   00:00:00  8kN
60...Rxh2 
  -+  (-7.56 ++)   Depth: 9/22   00:00:00  18kN
60...Rxh2 61.Rg3 g4 62.Rg1 Rh3+ 63.Kd4 Rd8+ 64.Kc5 g3 65.Kb6 Kxe5 66.Kxa6 Rd2 
  -+  (-7.59)   Depth: 9/24   00:00:00  67kN
60...Rxh2 61.Re1 Rd8+ 62.Kc3 g4 63.Rf1+ Kxe5 64.Re1+ Kf5 65.Rf1+ Kg5 66.Rg1 e5 67.Rg3 
  -+  (-7.88)   Depth: 10/25   00:00:00  91kN
60...Rxh2 61.Re1 Rd8+ 62.Kc3 g4 63.Rg1 Rh3+ 64.Kb4 g3 65.Ka5 Rd4 66.Kxa6 Rxa4+ 67.Kb6 Kxe5 68.Kc5 Ra2 
  -+  (-7.96)   Depth: 11/25   00:00:00  130kN
60...Rxh2 61.Re1 Rd8+ 62.Kc3 g4 63.Rg1 Rh3+ 64.Kb4 g3 65.Ka5 Rd4 66.Rg2 Kxe5 67.Kxa6 Rxa4+ 68.Kb5 Ra1 69.Kc4 Kf4 70.Kd3 Rd1+ 71.Ke2 Rh2 
  -+  (-8.17)   Depth: 12/32   00:00:00  272kN
60...Rxh2 61.Re1 Rd8+ 62.Kc3 g4 63.Rg1 Rh3+ 64.Kb4 g3 65.Ka5 Rd4 66.Rg2 Kxe5 67.Kxa6 Rxa4+ 68.Kb5 Ra1 69.Kc4 Kf4 70.Kd3 Rd1+ 71.Ke2 Rh2 
  -+  (-8.17)   Depth: 13/32   00:00:00  429kN
60...Rxh2 
  -+  (-8.50 ++)   Depth: 14/35   00:00:00  1048kN
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kb3 Rb8+ 64.Kc3 Rxa4 65.Rf1+ Kxe5 66.Re1+ Re4 67.Ra1 Rc8+ 68.Kb3 g4 69.Rxa6 g3 70.Ra2 Rf8 71.Ra5+ Kd4 72.Ra4+ Ke3 
  -+  (-8.67)   Depth: 14/35   00:00:00  1518kN
60...Rxh2 61.Re1 Rd8+ 62.Kc3 g4 63.Rf1+ Kxe5 64.Re1+ Kf5 65.Rf1+ Kg5 66.Rg1 e5 67.Re1 Rh3+ 68.Kc2 g3 69.Rxe5+ Kf4 70.Re7 g2 71.Rf7+ Kg4 72.Rg7+ Kf3 73.Rg6 a5 
  -+  (-8.85)   Depth: 15/35   00:00:00  2429kN
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kc3 Rxa4 64.Kb3 Re4 65.Ra1 Kxe5 66.Rxa6 g4 67.Kc3 g3 68.Ra2 Re3+ 69.Kb4 Rd4+ 70.Kb5 Rb3+ 71.Kc5 Rdd3 72.Kc6 Rdc3+ 73.Kd7 Rb7+ 74.Kd8 Ke4 75.Re2+ Re3 
  -+  (-9.03)   Depth: 16/40   00:00:00  4196kN, tb=2
60...Rxh2 
  -+  (-9.41 ++)   Depth: 17/44   00:00:01  6940kN, tb=2
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kb3 Rb8+ 64.Kc3 Rxa4 65.Rg1 g4 66.Kc2 Kxe5 67.Re1+ Re4 68.Rg1 Rc8+ 69.Kd2 Rd8+ 70.Kc2 Re2+ 71.Kc3 Re3+ 72.Kc2 g3 73.Rg2 Rd4 74.Kc1 Rf4 75.Kd1 Rf1+ 76.Kd2 Rf2+ 77.Kxe3 Rxg2 78.Kf3 a5 
  -+  (-9.44)   Depth: 17/45   00:00:01  9155kN, tb=2
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kb3 Rb8+ 64.Kc3 Rxa4 65.Rg1 g4 66.Rf1+ Kxe5 67.Re1+ Re4 68.Rg1 Rc8+ 69.Kd2 Rd8+ 70.Kc2 Re2+ 71.Kb3 Re3+ 72.Kc2 g3 73.Rg2 Rd4 74.Kc1 Kf4 75.Rg1 e5 76.Rf1+ Rf3 
  -+  (-9.50)   Depth: 18/45   00:00:02  11347kN, tb=2
60...Rxh2 
  -+  (-9.89 ++)   Depth: 19/48   00:00:04  21051kN, tb=9
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kc5 Rxa4 64.Rh1 g4 65.Rg1 Kxe5 66.Kc6 Rb8 67.Kd7 Rb3 68.Rg2 g3 69.Rc2 Kd5 70.Ke7 e5 71.Kf6 e4 72.Kg5 e3 73.Rg2 Rb8 74.Kh5 Rd4 75.Re2 Ke4 
  -+  (-10.06)   Depth: 19/51   00:00:06  29771kN, tb=48
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kc3 Rxa4 64.Rh1 g4 65.Rh5+ Ke4 66.Kb3 Rad4 67.Rg5 Rd3+ 68.Kc4 g3 69.Kc5 Kf4 70.Rg6 Kxe5 71.Rg5+ Kf6 72.Rg4 Rb8 73.Kc4 Ra3 74.Rf4+ Ke5 75.Rf1 Rc8+ 76.Kb4 Re3 77.Rg1 Rc2 78.Rf1 g2 79.Ra1 Rc8 80.Rg1 Re2 81.Kb3 Ke4 82.Rd1 e5 83.Rg1 Kf3 
  -+  (-10.17)   Depth: 20/53   00:00:09  44368kN, tb=64
60...Rxh2 61.Re1 Rd8+ 62.Kc3 g4 63.Rg1 Rh3+ 64.Kb4 Rd5 65.Kc4 Rxe5 66.Kb4 g3 67.Kc4 Re4+ 68.Kc5 Rxa4 69.Rg2 e5 70.Kd5 Rd4+ 71.Kc5 a5 72.Kb5 a4 73.Kc5 a3 74.Ra2 Ra4 75.Kb5 Rh2 76.Ra1 Rhh4 77.Ra2 Rab4+ 78.Kc5 Rbc4+ 79.Kb5 Rb4+ 80.Kc5 
  -+  (-10.41)   Depth: 21/54   00:00:14  71222kN, tb=153
60...Rxh2 
  -+  (-10.84 ++)   Depth: 22/58   00:00:23  117mN, tb=412
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kb3 Rb8+ 64.Kc3 Rxa4 65.Kd3 Rd8+ 66.Kc3 g4 67.Re2 Rb8 68.Rg2 Kxe5 69.Re2+ Re4 70.Rg2 Kf4 71.Kd3 Re3+ 72.Kd4 Rd8+ 73.Kc5 g3 74.Rg1 Re2 75.Kb6 g2 76.Kxa6 e5 77.Kb6 e4 78.Kc7 Rd3 79.Kb6 e3 80.Ra1 Kf3 
  -+  (-10.87)   Depth: 22/58   00:00:31  163mN, tb=714
60...Rxh2 61.Re1 Rd8+ 62.Kc4 Rh4+ 63.Kc3 Rxa4 64.Rh1 g4 65.Rh5+ Ke4 66.Rh2 Kxe5 67.Rg2 Re4 68.Kb2 Rb8+ 69.Kc2 Kf4 70.Kd3 Re3+ 71.Kd4 Rd8+ 72.Kc5 g3 73.Rg1 Re2 74.Kb6 g2 75.Kxa6 e5 76.Kb6 e4 77.Kc7 Rd3 78.Kb6 e3 79.Ra1 Kf3 
  -+  (-11.04)   Depth: 23/58   00:00:35  184mN, tb=729
60...Ra3+ 
  -+  (-11.32 ++)   Depth: 23/58   00:00:36  189mN, tb=729
60...Ra3+ 
  -+  (-12.22 ++)   Depth: 23/58   00:00:38  196mN, tb=729
60...Ra3+ 
  -+  (-14.80 ++)   Depth: 23/58   00:00:45  236mN, tb=736
60...Ra3+ 
  -+  (-22.43 ++)   Depth: 23/58   00:01:00  332mN, tb=789
60...Ra3+ 61.Kd2 Rd8+ 62.Kc2 Rxe3 63.Bg1 Rxe5 64.Bb6 Red5 65.Ba7 g4 66.Bg1 Rc8+ 67.Kb3 g3 68.Ka3 g2 69.Bh2 Rd3+ 70.Kb2 e5 71.a5 Rd1 72.Kb3 Rb1+ 73.Ka3 Rc2 74.Bg1 Rxg1 75.Kb3 Rc8 76.Kb2 Re1 77.Ka3 g1Q 78.Ka2 Re2+ 79.Kb3 Qa1 80.Kb4 Rb2# 
  -+  (-#22)   Depth: 23/59   00:01:17  427mN, tb=1036
60...Ra3+ 61.Kd2 Rd8+ 62.Kc2 Rxe3 63.Bg1 Rxe5 64.Kc3 Re4 65.a5 g4 66.Bb6 Rc8+ 67.Kd2 g3 68.Ba7 g2 69.Bg1 Ra4 70.Ke2 Rxa5 71.Kf3 Rc2 72.Kg3 Ra3+ 73.Kh2 e5 74.Bf2 Rxf2 75.Kg1 Rd2 76.Kh2 g1Q+ 77.Kxg1 Ra1# 
  -+  (-#18)   Depth: 24/59   00:01:28  493mN, tb=1322
60...Ra3+ 61.Kd2 Rd8+ 62.Kc2 Rxe3 63.Bg1 Rxe5 64.Kb3 g4 65.Kc3 g3 66.Bb6 g2 67.Bg1 Rc8+ 68.Kd2 Ra5 69.Bf2 Rxa4 70.Kd3 Ra3+ 71.Kd2 Ra2+ 72.Ke3 Rc3+ 73.Kd4 Rac2 74.Be3 e5+ 75.Kd5 Rd3+ 76.Bd4 Rxd4# 
  -+  (-#17)   Depth: 25/59   00:01:37  547mN, tb=1829
60...Ra3+ 61.Kd4 Rd8+ 62.Kc5 Rxe3 63.Bg1 Rc8+ 64.Kb6 Rb3+ 65.Ka7 g4 66.Bf2 g3 67.Bg1 a5 68.Bd4 g2 69.Bf2 Rc1 70.Bd4 g1Q 71.Bxg1 Rxg1 72.Ka8 Kxe5 73.Ka7 Rg8 74.Ka6 Ra8# 
  -+  (-#15)   Depth: 26/59   00:02:10  778mN, tb=4211
60...Ra3+ 61.Kd4 Rd8+ 62.Kc5 Rxe3 63.Bg1 Rc8+ 64.Kb6 Rb3+ 65.Ka5 g4 66.Ba7 g3 67.Bd4 g2 68.Bf2 Rc1 69.Ba7 g1Q 70.Bxg1 Rxg1 71.Kxa6 Kxe5 72.a5 Ra1 73.Ka7 Rxa5# 
  -+  (-#14)   Depth: 27/59   00:02:33  949mN, tb=8757
60...Ra3+ 61.Kd4 Rd8+ 62.Kc5 Rxe3 63.Bg1 Rc8+ 64.Kb6 Rb3+ 65.Ka5 g4 66.Ba7 g3 67.Bd4 g2 68.Bf2 Rc1 69.Ba7 g1Q 70.Bxg1 Rxg1 71.Kxa6 Kxe5 72.a5 Ra1 73.Ka7 Rxa5# 
  -+  (-#14)   Depth: 28/59   00:02:52  1093mN, tb=11601
60...Ra3+ 61.Kd4 Rd8+ 62.Kc5 Rxe3 63.Bg1 Rc8+ 64.Kb4 a5+ 65.Kxa5 Rb3 66.Ka6 Ra8+ 67.Ba7 g4 68.a5 Rxa7+ 69.Kxa7 g3 70.Ka8 g2 71.Ka7 g1Q+ 72.Ka6 Qg2 73.Ka7 Qb7# 
  -+  (-#14)   Depth: 29/59   00:03:31  1387mN, tb=16197
60...Ra3+ 61.Kd4 Rd8+ 62.Kc5 Rxe3 63.Bg1 Rc8+ 64.Kb4 a5+ 65.Kxa5 Rb3 66.Ka6 Ra8+ 67.Ba7 g4 68.a5 Rxa7+ 69.Kxa7 g3 70.Ka8 g2 71.Ka7 g1Q+ 72.Ka6 Qg2 73.Ka7 Qb7# 
  -+  (-#14)   Depth: 30/59   00:04:38  1898mN, tb=23262
60...Ra3+ 61.Kd4 Rd8+ 62.Kc4 Rxe3 63.Bg1 Rc8+ 64.Kb4 a5+ 65.Kxa5 Rb3 66.Ka6 Ra8+ 67.Ba7 g4 68.a5 Rxa7+ 69.Kxa7 g3 70.Ka8 g2 71.Ka7 g1Q+ 72.Ka6 Qg2 73.Ka7 Qb7# 
  -+  (-#14)   Depth: 31/59   00:07:34  3260mN, tb=40050

(Eren Yavuz,  18.07.2012)

[kgburcham]

Here is a position from a Amateur playoff game between Delphil 2.9a and Exchess 6.30b.
Exchess to move and Delphil is Mat in ?
[D]2r5/8/p3p3/4Pkp1/P7/3KR3/r6B/8 b - - 0 60

Cheers,
Gab

Critter-1.6a appears to have found a mate-in-13 using MultiPV=3:

Code: Select all

33/74  27:43   16593M   9975K   +M13 Rxh2 Re1 Rcc2 Ke3 Rcd2 a5 Rhf2 Rf1 Rxf1 Kxd2 g4 Ke2 Rf3 Kd2 g3 Ke2 Kf4 Kd2 g2 Kc2 g1=Q Kb2 Qg2+ Kc1 Rf1#
code][/quote]

Louis
what split depth have you found to be best with your 8 threads?
thanks

[zullil]

Louis
what split depth have you found to be best with your 8 threads?
thanks

I settled on 8 as the default after some rather informal testing of Critter-1.4. I haven't done any testing with Critter-1.6a, and am still using 8. When I tested Stockfish long ago, I think I found 6 or 7 seemed best for that engine. Since you have 12 threads, perhaps 9 or 10 would be better for you? Not sure. What are you using when you run 12 threads?

[syzygy]

Critter-1.6a appears to have found a mate-in-13 using MultiPV=3:

Code: Select all

33/74  27:43   16593M   9975K   +M13 Rxh2 Re1 Rcc2 Ke3 Rcd2 a5 Rhf2 Rf1 Rxf1 Kxd2 g4 Ke2 Rf3 Kd2 g3 Ke2 Kf4 Kd2 g2 Kc2 g1=Q Kb2 Qg2+ Kc1 Rf1#

(...)

Seems to be correct.

[kgburcham]

Louis
what split depth have you found to be best with your 8 threads?
thanks

I settled on 8 as the default after some rather informal testing of Critter-1.4. I haven't done any testing with Critter-1.6a, and am still using 8. When I tested Stockfish long ago, I think I found 6 or 7 seemed best for that engine. Since you have 12 threads, perhaps 9 or 10 would be better for you? Not sure. What are you using when you run 12 threads?

thanks for the info.
Critter wont heat up my 12 threads, pc at 52c when oc to 4.5, runs about 85% in task manager.
Rybka and Houdini with my computer room temp at 74F, runs at steady 100% in task manager and pc runs 60c, I control pc temp with room temp thermostat, when running 4.5gigx12. this is with cpu air coolers not water.
be back in a minute with split depth results

[kgburcham]

Louis
what split depth have you found to be best with your 8 threads?
thanks

What are you using when you run 12 threads?

reboot between each test.
first pc is 6 threads single socket
second pc is 12 threads two sockets.
both using same 4096 hash
notice scaling
Critter is not optimized for 12 threads.
even with min split depth at 12, the pc still wont heat up and task manager is not steady and is not near 100%.

[D] 2r5/8/p3p3/4Pkp1/P7/3KR3/r6B/8 b - - 0 60

CPU0: GenuineIntel Intel64 Family 6 Model 44 Stepping 2 3373 MHz
CPU1: GenuineIntel Intel64 Family 6 Model 44 Stepping 2 3373 MHz
CPU2: GenuineIntel Intel64 Family 6 Model 44 Stepping 2 3373 MHz
CPU3: GenuineIntel Intel64 Family 6 Model 44 Stepping 2 3373 MHz
CPU4: GenuineIntel Intel64 Family 6 Model 44 Stepping 2 3373 MHz
CPU5: GenuineIntel Intel64 Family 6 Model 44 Stepping 2 3373 MHz

Critter 1.6a 64-bit
split depth 6

24/56 0:22 -21.16+ 1...Ra3+ 2.Kd4 Rd8+ (348.734.809) 15468
24/56 0:26 -21.63 1...Ra3+ 2.Kd4 Rd8+ (416.258.838) 15589
25/60 0:34 -22.17 1...Ra3+ 2.Kd4 Rd8+ (545.290.389) 15984
26/60 0:45 -22.18 1...Ra3+ 2.Kd4 Rd8+ (750.173.974) 16464
27/60 0:58 -23.56+ 1...Ra3+ 2.Kd4 Rd8+ (983.752.994) 16722
27/60 1:44 -M19 1...Ra3+ 2.Kd4 Rd8+ (1.711.196.475) 16411
28/60 1:57 -M19 1...Ra3+ 2.Kd4 Rd8+ (1.912.761.189) 16336
29/60 3:17 -M14 1...Ra3+ 2.Kd4 Rd8+ (3.181.356.188) 16108
30/60 3:52 -M14 1...Ra3+ 2.Kd4 Rd8+ (3.764.943.390) 16191
31/60 4:28 -M14 1...Ra3+ 2.Kd4 Rd8+ (4.347.354.778) 16221

split depth
default 5

27/68 0:55 -M31 1...Ra3+ 2.Kd4 Rd8+ (904.907.699) 16385
28/68 1:06 -M30 1...Ra3+ 2.Kd4 Rd8+ (1.077.632.798) 16195
29/68 2:21 -M17 1...Ra3+ 2.Kd4 Rd8+ (2.190.313.390) 15469
30/68 3:55 -M14 1...Ra3+ 2.Kd4 Rd8+ (3.659.801.442) 15538
31/68 4:44 -M14 1...Ra3+ 2.Kd4 Rd8+ (4.437.192.291) 15612


CPU0: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU1: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU2: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU3: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU4: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU5: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU6: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU7: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU8: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU9: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU10: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz
CPU11: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4416 MHz


Critter 1.6a 64-bit
split depth 6

25/64 1:35 -M26 1...Ra3+ 2.Kd4 Rd8+ (1.450.531.593) 15241
26/64 1:49 -M24 1...Ra3+ 2.Kd4 Rd8+ (1.617.071.393) 14802
27/64 2:10 -M20 1...Ra3+ 2.Kd4 Rd8+ (1.868.362.552) 14343
28/64 2:42 -M17 1...Ra3+ 2.Kd4 Rd8+ (2.243.140.532) 13814
29/64 3:09 -M17 1...Ra3+ 2.Kd4 Rd8+ (2.579.508.730) 13590


Critter 1.6a 64-bit
split depth 10

24/58 0:33 -M24 1...Ra3+ 2.Kd4 Rd8+ (701.294.103) 21178
25/58 0:35 -M21 1...Ra3+ 2.Kd4 Rd8+ (737.294.911) 20938
26/58 0:41 -M14 1...Ra3+ 2.Ke2 Rc2+ (835.889.865) 20055
27/58 0:42 -M14 1...Ra3+ 2.Ke2 Rc2+ (840.735.172) 19995
28/58 0:43 -M14 1...Ra3+ 2.Ke2 Rc2+ (866.065.021) 19693
29/58 0:45 -M14 1...Ra3+ 2.Ke2 Rc2+ (889.829.623) 19485
30/58 0:50 -M14 1...Ra3+ 2.Ke2 Rc2+ (950.581.107) 19003
31/58 0:56 -M14 1...Ra3+ 2.Ke2 Rc2+ (1.039.354.427) 18403
32/58 1:05 -M14 1...Ra3+ 2.Ke2 Rc2+ (1.133.147.831) 17298
33/58 1:16 -M14 1...Ra3+ 2.Ke2 Rc2+ (1.283.969.643) 16704
34/58 1:39 -M14 1...Ra3+ 2.Ke2 Rc2+ (1.601.903.246) 16137
35/58 2:15 -M14 1...Ra3+ 2.Ke2 Rc2+ (2.087.755.105) 15372
36/58 3:13 -M14 1...Ra3+ 2.Ke2 Rc2+ (2.854.579.488) 14727

Critter 1.6a 64-bit
split depth 12

25/60 0:38 -M23 1...Ra3+ 2.Kd4 Rd8+ (882.436.075) 23082
26/60 0:47 -M20 1...Ra3+ 2.Kd4 Rd8+ (1.115.538.055) 23652
27/60 0:50 -M20 1...Ra3+ 2.Kd4 Rd8+ (1.195.165.277) 23676
28/60 0:54 -M20 1...Ra3+ 2.Kd4 Rd8+ (1.284.024.323) 23742
29/60 1:16 -M19 1...Ra3+ 2.Kd4 Rd8+ (1.906.133.359) 24910
30/60 2:08 -M14 1...Ra3+ 2.Kd4 Rd8+ (3.125.601.917) 24293
31/60 2:44 -M14 1...Ra3+ 2.Kd4 Rd8+ (4.021.535.544) 24421
32/60 4:19 -M14 1...Ra3+ 2.Ke2 Rc2+ (6.228.246.645) 23978
33/60 4:27 -M14 1...Ra3+ 2.Ke2 Rc2+ (6.424.635.400) 24011
34/60 4:40 -M14 1...Ra3+ 2.Ke2 Rc2+ (6.730.169.300) 24007
35/60 5:05 -M14 1...Ra3+ 2.Ke2 Rc2+ (7.336.084.253) 24043

split depth 12
2nd run

25/62 0:26 -M30 1...Ra3+ 2.Kd4 Rd8+ (582.876.025) 21855
26/62 0:32 -M29 1...Ra3+ 2.Kd4 Rd8+ (718.776.810) 22428
27/62 0:39 -M26 1...Ra3+ 2.Kd4 Rd8+ (904.493.139) 23090
28/62 0:50 -M22 1...Ra3+ 2.Kd4 Rd8+ (1.203.495.365) 23716
29/62 1:26 -M19 1...Ra3+ 2.Kd4 Rd8+ (2.190.377.407) 25408
30/62 2:23 -M14 1...Ra3+ 2.Ke2 Rc2+ (3.564.702.454) 24774
31/62 2:28 -M14 1...Ra3+ 2.Ke2 Rc2+ (3.668.740.445) 24729
32/62 2:36 -M14 1...Ra3+ 2.Ke2 Rc2+ (3.858.907.147) 24637
33/62 2:46 -M14 1...Ra3+ 2.Ke2 Rc2+ 3(4.081.206.966) 24544
34/62 3:05 -M14 1...Ra3+ 2.Ke2 Rc2+ (4.515.902.072) 24328
35/62 3:41 -M14 1...Ra3+ 2.Ke2 Rc2+ (5.478.512.204) 24743
36/62 4:39 -M14 1...Ra3+ 2.Ke2 Rc2+ (6.815.497.513) 24372