TalkChess.com

Hi,

[D]8/3p1p1p/3K1P2/4P3/1p6/1Pp5/PbP2ppp/1R1N1bqk w - -

Mate in 29

by Herbert Grasemann
Die Schwalbe 1964
Breuer Memorial
3rd prize



Michael
http://www.playwitharena.com

Hi,


[D]8/3p1p1p/3K1P2/4P3/1p6/1Pp5/PbP2ppp/1R1N1bqk w - -

Mate in 29

by Herbert Grasemann
Die Schwalbe 1964
Breuer Memorial
3rd prize

so any change here, can Stockfish do it by now?

Michael Diosi
http://www.playwitharena.com

Black queen is particularly well placed.
Can you get this position in a real game?

Hi,

I didn't try a proofgame...


Michael Diosi
http://www.playwitharena.com

Can dedicated mate solvers solve this position? Chest maybe?
What's the mainline?

Hi,


Chest:No
Alybadix:No
Gustav:No
Popeye:No
WinChloe: No
VKSach:No

Stockfish Matefinder maybe? But my PC is too slow *wink*

Michael Diosi
http://www.pleywitharena.com

Hmm, the only moves that don't outright lose are e6, Kc5, Kc7, Ke7
So it has to be one of them.

Hi,


1.Kc7 Ba3 2.Kb8 Bb2 3.Ka8 Ba3 4.Ka7 Bb2 5.Kb6 Ba3 6.Kc5 h6 7.Kd6 Bb2 8.Ke7 Ba3 9.Kf8 Bb2 10.Kg7 h5 11.Kf8 Ba3 12.Ke7 Bb2 13.Kd6 Ba3 14.Kc5 h4 15.Kd4 Bb2 16.Ke3 Ba3 17.Kf4 Bb2 18.Kg5 Ba3 19.K×h4 Bb2 20.Kh3 Ba3 21.Kg3 Bb2 22.Kf4 Ba3 23.Ke3 Bb2 24.Kd4 Ba3 25.Kc5 d6+ 26.e×d6 Bb2 27.K×b4 Ba3+ 28.K×a3 B~ 29.N×f2‡



~=wherever

Michael Diosi
http://www.playwitharena.com

Your PC is too slow? No PC is too slow for Stockfish. It even runs on a Raspberry Pi I think, assuming it can handle the C++11 code, or anything that can compile C++11. Okay, I suppose that is not yet as widespread as C itself. Here is almost latest pre Stockfish 7 beta, slightly modified, but 32 bit, and on a slow Q6700, from 2008

8/3p1p1p/3K1P2/4P3/1p6/1Pp5/PbP2ppp/1R1N1bqk w - -

Engine: Rainbow Serpent SF20151218_001 based on Sf20150919_004 MOD MP (Q6700, 4X2672 MHz, 512 MB, 32 bit)
Most recent changes; Stockfish sourcecode (latest, except the last mobility change), but added code per 29-10:
Nullmove also in simple endgames,
Oldstyle verification of nullmove, so no longer with Jörg's changes.
Retains probcutlike treshold and this increased to 200 per pawn.
Simple endgames always verified (nullmove).
Keeping Jörg's 3 fold repetition when in analysis mode.
Singular extensions combined here again with reductions for nonsingular moves, so not replaced with only the reductions.
by Tord Romstad, Marco Costalba, Joona Kiiski, Gary Linscott

35/25 0:01 0.00 1.Kc5 Ba3 2.Kd4 h6 3.Kc5 h5 4.Kd4 Bb2
5.Kc5 Ba3 (3.978.435) 3771

36/25 0:01 0.00 1.Kc5 Ba3 2.Kd4 h6 3.Kc5 h5 4.Kd4 Bb2
5.Kc5 Ba3 (4.995.753) 3770

37/25 0:01 0.00 1.Kc5 Ba3 2.Kd4 h6 3.Kc5 h5 4.Kd4 Bb2
5.Kc5 Ba3 (5.372.745) 3767

38/25 0:01 0.00 1.Kc5 Ba3 2.Kd4 h6 3.Kc5 h5 4.Kd4 Bb2
5.Kc5 Ba3 (6.774.057) 3752

39/25 0:02 0.00 1.Kc5 Ba3 2.Kd4 h6 3.Kc5 h5 4.Kd4 Bb2
5.Kc5 Ba3 (8.767.142) 3730

40/25 0:04 0.00 1.Kc5 Ba3 2.Kd4 h6 3.Kc5 h5 4.Kd4 Bb2
5.Kc5 Ba3 (15.185.703) 3725
.
.
.
56/25 10:54 0.00 1.Kc5 Ba3 2.Kd4 Bb2 3.Kc5 (2.634.209.225) 4025

57/25 12:26 0.00 1.Kc5 Ba3 2.Kd4 Bb2 3.Kc5 (3.006.997.034) 4029

58/25 12:57 0.00 1.Kc5 Ba3 2.Kd4 Bb2 3.Kc5 (3.128.965.224) 4024

59/25 17:58 +0.03++ 1.Kc7 (4.355.049.841) 4039

59/57 19:02 +0.06++ 1.Kc7 (4.630.278.671) 4053

59/57 27:26 +0.20++ 1.Kc7 (6.799.519.655) 4128

59/57 27:37 +0.29++ 1.Kc7 (6.847.170.036) 4129

59/57 29:31 +0.42++ 1.Kc7 (7.350.504.559) 4150

59/57 30:59 +0.60++ 1.Kc7 (7.751.094.892) 4168

59/57 33:23 +0.84++ 1.Kc7 (8.398.284.638) 4192

59/57 35:33 +1.15++ 1.Kc7 (9.019.655.295) 4227

59/57 36:44 +1.58++ 1.Kc7 (9.329.642.380) 4232

59/57 38:39 +2.38++ 1.Kc7 (9.806.367.420) 4228

59/57 40:59 +1.61-- 1.Kc7 Ba3 (10.403.547.180) 4229

59/57 41:11 +2.37++ 1.Kc7 (10.451.585.528) 4229

hI;


I was waitining for the mate score as the problem is that in the middle of the solution the trees explodes and programs don't really have a clue what is going on.

So yes my PC is too slow...

Michael Diosi
http://www.pleywitharena.com