Stockfish/McBrain 2.5 Release

[MikeB]

Details, Source and all flavors of Exe's are available here:

https://github.com/MichaelB7/Stockfish/ ... s/tag/v2.5

[Vinvin]

Thanks Michael !!

[MikeB]

Thanks Michael !!

Thanks Vince, found this position on fish cooking, posted by Bryan Mourik:

[d]5nkr/ppp3q1/4p1bp/3pP3/3P1Q2/R6R/PPP2PP1/2K5 b - - 4 28

McBrain does pretty well on this one - here using just two cores.

Code: Select all

(white viewpoint)
dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 37	+0.28!	2.21G	11:12.21	Bf5! 
 37	+0.40?	1.83G	9:21.84	Bf5 Rhb3? 
 37	+0.25?	1.75G	8:55.87	Bf5 Rhb3? 
 37	+0.14?	1.72G	8:49.61	Bf5 Rhb3? 
 37	+0.07?	1.71G	8:44.74	Bf5 Rhb3? 
 36	  0.00 	1.67G	8:34.87	Bf5 Rhb3 h5 Qh4 Qh6+ Kd1 Rh7 Rg3+ Ng6 Qd8+ Qf8 Qxf8+ Kxf8 Rxa7 h4 Rb3 Nf4 Rbxb7 Nxg2 Ra8+ Kg7 Rxc7+ Kh6 Rxh7+ Kxh7 Ke2 h3 Kf3 Nf4 Kg3 Ne2+ Kh2 Nxd4 c3 Nf3+ Kg3 Nd2 f3 Nf1+ Kf2 Ne3 Kg1 Nc4 Kh2 Nd2 Kg3 
 36	+0.18!	1.48G	7:35.40	Bf5! 
 36	+0.30?	1.40G	7:13.22	Bf5 Rhb3? 
 36	+0.08!	1.38G	7:06.12	Bf5! 
 36	+0.15?	1.36G	6:58.82	Bf5 Rhb3? 
 35	+0.08!	1.11G	5:43.58	Bf5! 
 35	+0.15?	1.09G	5:37.48	Bf5 Rhc3? 
 34	+0.08 	1.07G	5:30.64	Bf5 Rhc3 a6 Rab3 b6 Rc6 Ng6 Qe3 Rh7 Rbc3 Qd7 f3 Nf8 g4 Bg6 Rxc7 Qxc7 Rxc7 Rxc7 c3 h5 gxh5 Bxh5 Qg5+ Bg6 Qd8 Rh7 Qxb6 Rh2 a4 Rc2+ Kb1 Rxc3+ Ka2 Rxf3 Qxa6 Rf4 Qb6 Rf1 
 34	+0.15!	1.01G	5:10.47	Bf5! 
 34	+0.27?	969.8M	4:59.21	Bf5 Rhc3? 
 34	+0.05!	813.9M	4:11.99	Bf5! 
 34	+0.12?	779.6M	4:01.54	Bf5 Rhb3? 
 33	+0.05 	725.8M	3:45.31	Bf5 Rhb3 h5 Qh4 Qh6+ Kd1 Rh7 Rxb7 Rf7 Rg3+ Kh7 Rc3 Ng6 Qh2 h4 Rbxc7 Rxc7 Rxc7+ Kg8 Rc8+ Kg7 Rc3 Qf4 Rc7+ Kh6 Qxf4+ Nxf4 Rxa7 Nxg2 Ke2 h3 Kf3 Ne1+ Kg3 Nxc2 Ra4 Kh5 f3 Ne3 Kh2 Nf1+ Kg1 
 33	+0.17!	619.6M	3:12.62	Bf5! 
 33	+0.54!	553.7M	2:52.32	Bf5! 
 33	+0.83!	499.1M	2:35.63	a6! 
 33	+0.95?	487.6M	2:32.06	a6 Rhg3? 
 33	+0.72!	397.6M	2:04.57	a6! 
 33	+0.80!	388.5M	2:01.79	a6! 

[MikeGL]

Thanks for this release!
Looks like the 32-bit ones are working perfectly on my rusty machines. But both 32-bit labeled old and the generic 32 bit of this version seems to be working fine. Whats the difference between the two? Sorry if i missed some notes regarding the difference of these two Win32 compiles at your linked page.

[duncan]

Details, Source and all flavors of Exe's are available here:

https://github.com/MichaelB7/Stockfish/ ... s/tag/v2.5

how does one access 'UCI-LimitStrength' in arena ?

[MikeGL]

Details, Source and all flavors of Exe's are available here:

https://github.com/MichaelB7/Stockfish/ ... s/tag/v2.5

how does one access 'UCI-LimitStrength' in arena ?

I don't have the bleeding edge Arena GUI, but on my old version Arena it is Ctrl + 1 {{or control + one }}. If you want the mouse clicking way just click Engine Menu, Engine1 McBrain > Configure. It is displayed at the left hand side of that window.

This engine looks impressive because the Null_Move option can be disabled/enabled without recompiling the engine. I have already tested some difficult positions which can be easily solved by McBrain 32bit version, haven't seen any 32-bit version doing this feat.

[duncan]

Details, Source and all flavors of Exe's are available here:

https://github.com/MichaelB7/Stockfish/ ... s/tag/v2.5

how does one access 'UCI-LimitStrength' in arena ?

I don't have the bleeding edge Arena GUI, but on my old version Arena it is Ctrl + 1 {{or control + one }}. If you want the mouse clicking way just click Engine Menu, Engine1 McBrain > Configure. It is displayed at the left hand side of that window.

This engine looks impressive because the Null_Move option can be disabled/enabled without recompiling the engine. I have already tested some difficult positions which can be easily solved by McBrain 32bit version, haven't seen any 32-bit version doing this feat.

thanks

[Dariusz]

Very good news
Thank you Michael !!

[tpoppins]

both 32-bit labeled old and the generic 32 bit of this version seems to be working fine. Whats the difference between the two?

It's in SF Makefile:

Code: Select all

### 2.2 Architecture specific

<snip>

ifeq ($&#40;ARCH&#41;,x86-32-old&#41;
	arch = i386
endif

ifeq ($&#40;ARCH&#41;,x86-32&#41;
	arch = i386
	prefetch = yes
	sse = yes
endif

Prefetch
SSE

[yanquis1972]

hey michael, don't know if the 'readme' on the DL site is new or i just noticed it, but

For overnight analysis, I suggest setting the matefinder option on , Tactical to 3 or 4, and respect to minus 15.

is that for any (generally speaking) position, or extremely difficult positions with a solution?

at what level would tactical be set to to replicate the level of houdini 5 (or 3, since i think this is faster in some positions) tactical search? at what level do you think it goes beyond usefulness in the overwhelming majority of positions?

finally -- what settings would you recommend for, say 1hr analysis? 10min? (i assume default, maybe w/ some level of contempt) 30min? (i don't expect you to have any answer to these, & certainly not a definitive one, just asking out of curiosity)