Re: Sting SF 16
Posted: Tue Jul 30, 2019 2:48 pm
As I earlier wrote, I am working at a very interesting alternative in solving. it is the auto-playing.
A problem is how to solve such positions:
[d]4b3/5p2/2p4p/P1p1PN2/2pn2P1/P2k4/Pr1npKN1/B7 w - - 0 1
The Neghina's study after 8 easy moves (g2e1 d3c3 f5g3 e8d7 a5a6 d7c8 a6a7 c8b7) leads to:
[d]8/Pb3p2/2p4p/2p1P3/2pn2P1/P1k3N1/Pr1npK2/B3N3/ w - - 0 1
It is a "draw" position where Black is much stronger, but White is able to win this position thanks to a very long "lazy" king play and many zugzwang
positions. A problem is how to help to avoid it that the draw result "satisfies" the weaker side in "draw" positions. I found an interesting solution, but it needs still some time to end it.
A weak dual core (threads = 1; hash = 1024M) solves it with 30 second per move.
position fen 4b3/5p2/2p4p/P1p1PN2/2pn2P1/P2k4/Pr1npKN1/B7 w - -
go movetime 30000 play
g2e1 d3c3 f5g3 e8d7 a5a6 d7c8 a6a7 c8b7 f2g2 b7a8 g2h3 a8b7 g4g5 h6g5 e5e6 f7e6 h3g4 b7a8 g4h5 a8b7 h5g6 b7a8 g6f7 a8b7 f7e8 b7a8 e8d7 a8b7 d7d8 b7a8 d8e8 g5g4 e8d7 a8b7 d7d8 b7a8 d8c8 e6e5 c8d7 a8b7 d7e8 b7a8 e8f7 a8b7 f7f6 b7a8 f6g6 a8b7 g6h5 b7a8 h5g4 a8b7 g4h5 b7a8 h5g6 a8b7 g6f7 b7a8 f7e8 a8b7 e8d7 b7a8 d7c8 e5e4 c8d7 a8b7 d7e8 b7a8 e8f7 a8b7 f7g6 b7a8 g6f6 a8b7 f6f7 b7a8 f7e8 a8b7 e8d7 b7a8 d7c8 e4e3 c8d7 a8b7 d7e8 b7a8 e8f7 a8b7 f7g6 b7a8 g6f6 a8b7 f6f7 b7a8 f7e8 a8b7 e8d7 b7a8 d7c8 a8b7 c8b8 b7a6 a1b2 stop
go movetime 3000 play
c3b2 a7a8q a6b5 a3a4 d2f1 g3e2 d4e2 a4b5 c6b5 a8g2 f1g3 g2f3 c4c3 f3e3 c5c4 e3g5 b5b4 g5b5 b4b3 b5c4 b3a2 e1d3 b2c2 d3b4 c2c1 c4a2 c1d1 a2d5 d1e1 b4c2 e1f2 d5f7 f2g1 c2e3 e2d4 f7f4 d4f5 e3f5 g3f5 f4f5 g1g2 b8c7 g2g3 c7d6 c3c2 f5c2 g3f3 d6e5 f3e3 c2d1 e3f2 e5f4 f2g2 d1c2 g2f1 f4f3 f1g1 c2g2 Black is mated
A problem is how to solve such positions:
[d]4b3/5p2/2p4p/P1p1PN2/2pn2P1/P2k4/Pr1npKN1/B7 w - - 0 1
The Neghina's study after 8 easy moves (g2e1 d3c3 f5g3 e8d7 a5a6 d7c8 a6a7 c8b7) leads to:
[d]8/Pb3p2/2p4p/2p1P3/2pn2P1/P1k3N1/Pr1npK2/B3N3/ w - - 0 1
It is a "draw" position where Black is much stronger, but White is able to win this position thanks to a very long "lazy" king play and many zugzwang
positions. A problem is how to help to avoid it that the draw result "satisfies" the weaker side in "draw" positions. I found an interesting solution, but it needs still some time to end it.
A weak dual core (threads = 1; hash = 1024M) solves it with 30 second per move.
position fen 4b3/5p2/2p4p/P1p1PN2/2pn2P1/P2k4/Pr1npKN1/B7 w - -
go movetime 30000 play
g2e1 d3c3 f5g3 e8d7 a5a6 d7c8 a6a7 c8b7 f2g2 b7a8 g2h3 a8b7 g4g5 h6g5 e5e6 f7e6 h3g4 b7a8 g4h5 a8b7 h5g6 b7a8 g6f7 a8b7 f7e8 b7a8 e8d7 a8b7 d7d8 b7a8 d8e8 g5g4 e8d7 a8b7 d7d8 b7a8 d8c8 e6e5 c8d7 a8b7 d7e8 b7a8 e8f7 a8b7 f7f6 b7a8 f6g6 a8b7 g6h5 b7a8 h5g4 a8b7 g4h5 b7a8 h5g6 a8b7 g6f7 b7a8 f7e8 a8b7 e8d7 b7a8 d7c8 e5e4 c8d7 a8b7 d7e8 b7a8 e8f7 a8b7 f7g6 b7a8 g6f6 a8b7 f6f7 b7a8 f7e8 a8b7 e8d7 b7a8 d7c8 e4e3 c8d7 a8b7 d7e8 b7a8 e8f7 a8b7 f7g6 b7a8 g6f6 a8b7 f6f7 b7a8 f7e8 a8b7 e8d7 b7a8 d7c8 a8b7 c8b8 b7a6 a1b2 stop
go movetime 3000 play
c3b2 a7a8q a6b5 a3a4 d2f1 g3e2 d4e2 a4b5 c6b5 a8g2 f1g3 g2f3 c4c3 f3e3 c5c4 e3g5 b5b4 g5b5 b4b3 b5c4 b3a2 e1d3 b2c2 d3b4 c2c1 c4a2 c1d1 a2d5 d1e1 b4c2 e1f2 d5f7 f2g1 c2e3 e2d4 f7f4 d4f5 e3f5 g3f5 f4f5 g1g2 b8c7 g2g3 c7d6 c3c2 f5c2 g3f3 d6e5 f3e3 c2d1 e3f2 e5f4 f2g2 d1c2 g2f1 f4f3 f1g1 c2g2 Black is mated