sting 15

[lech]

Hi Marek,

what is exactly the difference between

forward 1 play,
forward 14 play,
play forward 1,
play forward 6

in your examples from above.

What means the number 1, 14 , 6

The number, after forward, means the count of skipped moves from PV-line returned earlier by searching.
It is your choise how many moves you want to skip.
I recommend to stop searching and to skip move(s), if it (they) satisfies you and to start searching from the new place. Next or instead of the new
searching you may start auto-playing, if you want to get the full solution.
The command forward goes to a new place definitely.

BTW. "forward 1 play" or "play forward 1" means the same.

[Paloma]

Thanks Marek.

Interesting new tools

[MikeB]

I see that the auto-playing is an interesting new tool and you like it.
One more example.

When your longanimity (searching) ends, you can go forward and start searching from the new place or (or next) can check the new position by auto-playing. You can always stop auto-playing and display diagram (d) or score (eval) and start auto-playing with new time per move or start searching at the new place.

bold = input lines
[d]8/5k2/6p1/4BP1p/6p1/p1p3PP/6P1/1n2K2R b K - 0 1
sting-sf-15
Sting 15 based on Stockfish 2.1.1 by Marek Kwiatkowski
setoption name hash value 1024
setoption name clear hash value true
setoption name threads value 1
position fen 8/5k2/6p1/4BP1p/6p1/p1p3PP/6P1/1n2K2R b K - 0 1
go movetime 3600000
info depth 35 multipv 1 score cp 557 nodes 365201479 nps 736082 time 496142 pv a3a2 f5g6 f7g6 e5c3 b1c3 e1g1 c3b1 h3h4 a2a1q g1h2 a1a5 f1b1 g6f5 b1e1 a5c3 e1e7 c3c6 e7e1 c6c7 e1c1 c7a7 c1a1 a7h7 a1e1 f5f6 e1e8 h7f7 e8e1 f7g6 e1d1 f6e5 d1a1 g6f7 a1a5 e5d4 a5a4 d4e3 a4a5 e3f2 a5e5 f2f1 e5a5 f1e2
info depth 36 multipv 1 score cp 557 nodes 442224980 nps 729709 time 606029 pv a3a2 f5g6 f7g8
<click Ctrl keyboard button to stop solution>
stop
info depth 37 multipv 1 score cp 557 nodes 445023885 nps 723819 time 614827 pv a3a2 f5g6 f7g8
go movetime 60000 play forward 3
g6g7 a2a1q e1g1 a1a7 g1h2 a7c5 f1f8 c5f8 g7f8q g8f8 h2g1 f8f7 e5f4 b1d2 g1f2 d2b3 f2e2 c3c2 e2d3 c2c1q f4c1 b3c1 d3d2 g4h3 g2h3 c1b3 d2e3 f7g6 e3f4 b3d4 h3h4 d4e6 f4e5 e6c5 e5f4 c5d3 f4e4 d3f2 e4f3 f2g4 f3f4 g6f6 f4e4 g4e5 e4f4 e5g6 f4e4 f6e6 g3g4 h5g4 h4h5 g6e5 h5h6 e6f7 h6h7 f7g7 h7h8n g7h8 e4f4 h8g8 f4e3 g8g7 e3e2 g7g6 e2d1 g4g3 d1e2 g6f6 e2e1 f6f5 e1f1 e5d3 f1g1 f5f4 g1g2 f4g4 g2f1 g4f3 f1g1 g3g2 g1h2 f3f2 h2h3 g2g1q h3h4 g1g6 h4h3 g6g3 White is mated

What happened here?
The moves 1... a2 2. fxg6+ Kxg6 lead to fortress.
Black can avoid the fortress by 2... Kg8 but it leads to a very long difficult endgame.

Hi lech,how did you find 2....Kg8?
thank you

sorry,my PC is old and something was bad,after 5 minutes it found 2....Kg8

Maybe I'm missing something, but I think Kg8 in this position loses. With this this position I see a huge plus 10 score for white.

[d]6k1/8/6p1/4BP1p/6p1/p1p3PP/6P1/1n2K2R w K - 1 2
with some back and forth ...

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 29	+14.05 	1.23G	0:35.39	Kd1 gxf5 Kc2 Nd2 Ra1 Ne4 Rxa3 Kf7 Ra6 Nc5 Rf6+ Ke8 Rxf5 Ke7 h4 Nd7 Rxh5 Nb6 Bf4 Ke8 Kxc3 Na4+ Kd4 Nb6 Re5+ Kf7 Rg5 Kf8 Rxg4 Ke8 h5 Nd7 h6 Nf8 
 28	+11.20 	698.8M	0:19.68	Kd1 Kf7 Kc2 Nd2 Kxc3 Ne4+ Kd4 Nd2 hxg4 gxf5 gxf5 a2 Kd3 Nb3 Rxh5 Nc5+ Ke3 Na4 Rh7+ Kf8 Rh8+ Ke7 Ra8 a1=Q Bxa1 Nc5 Ra7+ Kd6 Bd4 Nb3 g4 Nc1 Be5+ Kxe5 f6 Kd5 f7 Ke6 f8=Q 
 27	+12.39 	507.4M	0:14.16	Kd1 gxf5 Kc2 Nd2 Ra1 Ne4 Rxa3 Kf7 Ra6 Ke7 h4 Kf7 Rh6 Kg8 Rxh5 Nd2 Rxf5 Nc4 Bf4 Nb6 Kxc3 Na4+ Kc2 Nb6 Rh5 Kg7 Kc3 Nd7 Kd4 Nf6 Rg5+ Kh7 Be5 Ne8 Rxg4 Kh6 
 26	+11.76 	198.3M	0:05.38	Kd1 g5 Kc2 a2 Bxc3 Na3+ Kb3 Nb5 hxg4 Nd6 Rxh5 Kf8 Kxa2 Nf7 Bd4 Ke7 Rh7 Kf8 f6 Ke8 Rg7 Nd6 Bc5 Nf7 Kb2 Nd8 Rh7 Nf7 Kc3 
 25	+11.77 	164.5M	0:04.43	Kd1 gxf5 Kc2 Nd2 Ra1 Kf8 Kxc3 Ne4+ Kd4 Kf7 Rxa3 Ke6 Ra2 Kd7 Ra6 Kc8 h4 Kb7 Rh6 Nd2 Rxh5 Nb3+ Kc3 Nc5 Rxf5 Na4+ Kd4 Nb6 Bf4 Nc8 Rg5 Ka6 Kd3 Kb7 h5 Nb6 h6 Na4 Rxg4 Ka6 Kd4 Kb5 Rg5+ Kb4 h7 
 24	+11.77 	116.2M	0:03.08	Kd1 gxh3 gxh3 g5 Kc2 Nd2 Bxc3 Nc4 Re1 Nb6 Re6 Nd5 Rg6+ Kf7 Rxg5 Ne3+ Kb3 a2 Bb2 a1=B Bxa1 h4 gxh4 Nf1 Rg7+ Ke8 Bc3 Kd8 f6 Kc8 Rg8+ Kb7 
 23	+11.64 	96.8M  	0:02.56	Kd1 gxf5 Kc2 Nd2 Ra1 Ne4 Rxa3 Kf7 Ra6 Kg8 Ra7 Kf8 h4 f4 Bxf4 Ke8 Ra5 Nf6 Rf5 Nd7 Kxc3 Ke7 Ra5 Nf8 Rxh5 Ke6 Rg5 Nd7 h5 Nf8 h6 Nh7 Rg7 
 22	+11.61 	34.3M  	0:00.93	Kd1 g5 Kc2 Nd2 Kxc3 Ne4+ Kd4 Nd2 hxg4 a2 Kd3 Nb3 gxh5 Kh7 Ke3 Nc5 Ra1 Nd7 Rxa2 Kh6 g4 Nxe5 
 21	+11.60 	22.7M  	0:00.64	Kd1 g5 Kc2 Nd2 Kxc3 Ne4+ Kd4 Nd2 hxg4 a2 Kd3 Nb3 gxh5 Nc5+ Ke3 Nd7 Ra1 g4 Rxa2 Nxe5 Kf4 Nd3+ Kxg4 Nc5 Kg5 Kf8 Ra8+ Ke7 h6 Ne4+ Kg6 Nc5 h7 Kd6 h8=Q Kc7 Ra7+ Kb6 Qb8+ Kc6 
 20	+11.54 	15.5M  	0:00.44	Kd1 g5 Kc2 Nd2 Kxc3 Ne4+ Kd4 Nd2 hxg4 a2 Kd3 Nb3 gxh5 Nc5+ Ke3 Nd7 Ra1 Nxe5 Rxa2 g4 Kf4 Nd7 Kxg4 Nf6+ Kg5 Nd5 h6 Nb6 f6 Kf7 Ra7+ Ke6 Re7+ Kd6 h7 Nd5 h8=Q Nc3 Qd8+ Kc6 
 19	+11.28 	13.2M  	0:00.37	Kd1 g5 Kc2 Nd2 Kxc3 Ne4+ Kd4 Nd2 hxg4 a2 gxh5 Nb3+ Kd3 Nc5+ Ke3 Nd7 Ra1 Nxe5 Rxa2 g4 Ra8+ Kg7 Kf4 Nd3+ Kxg4 Kf6 h6 Ne5+ Kf4 Nd3+ Kf3 Ke5 h7 Ne1+ Ke2 Nxg2 h8=Q+ Ke4 Qh5 Kd4 
 18	+10.42 	7.49M  	0:00.21	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 Kd3 Ne4 Rxa2 Kf6 Ra6+ Ke5 Ra5+ Kf6 h4 Nd6 Kd4 Ne4 Ra6+ Kg7 Ke3 Kf7 Kf4 Nf2 
 17	+11.61 	6.73M  	0:00.19	Kd1 g5 Kc2 Nd2 Kxc3 Ne4+ Kd4 Nd2 hxg4 a2 Kd3 Nb3 gxh5 Nc5+ Ke3 Nd7 Ra1 Nxe5 Rxa2 g4 Kd4 Nf7 Ra8+ Kg7 Ra6 
 16	+10.42 	2.74M  	0:00.08	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 Kd3 Ne4 Rxa2 Kf6 Ra6+ Ke5 Ra5+ Kf6 h4 Nd6 Kd4 Ne4 Ra6+ Kg7 Ke3 Kf7 Kf4 
 15	+10.42 	2.07M  	0:00.06	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 Kd3 Ne4 Rxa2 Kf6 Ra6+ Ke5 Ra5+ Kf6 h4 Nd6 Kd4 Ne4 Ra6+ Kg7 Ke3 
 14	+10.42 	1.75M  	0:00.05	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 Kd3 Ne4 Rxa2 Kf6 Ra6+ Ke5 Ra5+ Kf6 h4 Nd6 Kd4 Ne4 Ra6+ Kg7 Ke3 
 13	+11.55 	1.09M  	0:00.03	Kd1 g5 Kc2 Nd2 Kxc3 Ne4+ Kd4 Nd2 hxg4 a2 Kd3 Nb3 gxh5 Na5 Rc1 Nb3 Rc8+ Kf7 Rc7+ Ke8 f6 Kd8 
 12	+10.42 	783310	0:00.02	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 Kd3 Ne4 Rxa2 Kf6 Ra6+ Ke5 Ra5+ Kf6 h4 Nd6 Kd4 
 11	+10.42 	515963	0:00.02	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 Kd3 Ne4 Rxa2 Kf6 Ra6+ Ke5 Ra5+ Kf6 h4 Nd6 
 10	+10.42 	425485	0:00.01	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 Kd3 Ne4 Rxa2 Kf6 Ra6+ Ke5 Ra5+ Kf6 
  9	+10.82 	287256	0:00.01	Kd1 c2+ Kxc2 g5 Kxb1 gxh3 gxh3 Kf7 Kc2 Kf8 Ra1 
  8	+11.61 	200377	0:00.01	Kd1 c2+ Kxc2 a2 fxg6 Na3+ Kd3 Nb1 hxg4 h4 Rxh4 Kf8 Rh8+ Ke7 g7 
  7	+10.42 	111958	0:00.00	Kf2 a2 Bxc3 Nxc3 Ra1 gxf5 Ke3 Kg7 
  6	+11.61 	67752  	0:00.00	Kd1 c2+ Kxc2 a2 fxg6 Na3+ Kd3 
  5	+11.61 	48831  	0:00.00	Kd1 c2+ Kxc2 a2 fxg6 Na3+ Kd3 
  4	+11.61 	35708  	0:00.00	Kd1 c2+ Kxc2 a2 fxg6 
  3	+11.61 	24329  	0:00.00	Kd1 c2+ Kxc2 a2 
  2	+11.61 	16124  	0:00.00	Kd1 c2+ Kxc2 
  1	+11.61 	8061    	0:00.00	Kd1

[lech]

I see that the auto-playing is an interesting new tool and you like it.
One more example.

When your longanimity (searching) ends, you can go forward and start searching from the new place or (or next) can check the new position by auto-playing. You can always stop auto-playing and display diagram (d) or score (eval) and start auto-playing with new time per move or start searching at the new place.

bold = input lines
[d]8/5k2/6p1/4BP1p/6p1/p1p3PP/6P1/1n2K2R b K - 0 1
sting-sf-15
Sting 15 based on Stockfish 2.1.1 by Marek Kwiatkowski
setoption name hash value 1024
setoption name clear hash value true
setoption name threads value 1
position fen 8/5k2/6p1/4BP1p/6p1/p1p3PP/6P1/1n2K2R b K - 0 1
go movetime 3600000
info depth 35 multipv 1 score cp 557 nodes 365201479 nps 736082 time 496142 pv a3a2 f5g6 f7g6 e5c3 b1c3 e1g1 c3b1 h3h4 a2a1q g1h2 a1a5 f1b1 g6f5 b1e1 a5c3 e1e7 c3c6 e7e1 c6c7 e1c1 c7a7 c1a1 a7h7 a1e1 f5f6 e1e8 h7f7 e8e1 f7g6 e1d1 f6e5 d1a1 g6f7 a1a5 e5d4 a5a4 d4e3 a4a5 e3f2 a5e5 f2f1 e5a5 f1e2
info depth 36 multipv 1 score cp 557 nodes 442224980 nps 729709 time 606029 pv a3a2 f5g6 f7g8
<click Ctrl keyboard button to stop solution>
stop
info depth 37 multipv 1 score cp 557 nodes 445023885 nps 723819 time 614827 pv a3a2 f5g6 f7g8
go movetime 60000 play forward 3
g6g7 a2a1q e1g1 a1a7 g1h2 a7c5 f1f8 c5f8 g7f8q g8f8 h2g1 f8f7 e5f4 b1d2 g1f2 d2b3 f2e2 c3c2 e2d3 c2c1q f4c1 b3c1 d3d2 g4h3 g2h3 c1b3 d2e3 f7g6 e3f4 b3d4 h3h4 d4e6 f4e5 e6c5 e5f4 c5d3 f4e4 d3f2 e4f3 f2g4 f3f4 g6f6 f4e4 g4e5 e4f4 e5g6 f4e4 f6e6 g3g4 h5g4 h4h5 g6e5 h5h6 e6f7 h6h7 f7g7 h7h8n g7h8 e4f4 h8g8 f4e3 g8g7 e3e2 g7g6 e2d1 g4g3 d1e2 g6f6 e2e1 f6f5 e1f1 e5d3 f1g1 f5f4 g1g2 f4g4 g2f1 g4f3 f1g1 g3g2 g1h2 f3f2 h2h3 g2g1q h3h4 g1g6 h4h3 g6g3 White is mated

What happened here?
The moves 1... a2 2. fxg6+ Kxg6 lead to fortress.
Black can avoid the fortress by 2... Kg8 but it leads to a very long difficult endgame.

Hi lech,how did you find 2....Kg8?
thank you

sorry,my PC is old and something was bad,after 5 minutes it found 2....Kg8

Maybe I'm missing something, but I think Kg8 in this position loses. With this this position I see a huge plus 10 score for white.

I think you are really missing something!
Try all the problem again!

[Paloma]

Maybe I'm missing something, but I think Kg8 in this position loses. With this this position I see a huge plus 10 score for white.
[d]6k1/8/6P1/4BP1p/6p1/p1p3PP/6P1/1n2K2R w K - 1 2

Hi Mike,
the right position is after 1... a2 2. fxg6+ Kxg6 lead to fortress.
Black can avoid the fortress by 2... Kg8 but it leads to a very long difficult endgame. (lech)

[d]6k1/8/6P1/4B2p/6p1/2p3PP/p5P1/1n2K2R w K - 1 0

[jp]

The number, after forward, means the count of skipped moves from PV-line returned earlier by searching.
It is your choise how many moves you want to skip.
I recommend to stop searching and to skip move(s), if it (they) satisfies you and to start searching from the new place. Next or instead of the new searching you may start auto-playing, if you want to get the full solution.
The command forward goes to a new place definitely.

So is it like selective depth search (some) engines have, except with user control?

[lech]

The number, after forward, means the count of skipped moves from PV-line returned earlier by searching.
It is your choise how many moves you want to skip.
I recommend to stop searching and to skip move(s), if it (they) satisfies you and to start searching from the new place. Next or instead of the new searching you may start auto-playing, if you want to get the full solution.
The command forward goes to a new place definitely.

So is it like selective depth search (some) engines have, except with user control?

A selective search, by external commands, for other engines helps to solve a position and it is only a trick in fact.
"Forward" and "auto-playing" help only to confirm and extend solution. The fact that "auto-playing" is to able to help to solve a position (a very long solution) it is only a question of the future. I am working at this and it looks very interesting.