Can any chess engine or mate finder solve the following:

[zullil]

Peter, after a small modification of Blathy study (without h pawns), I think Sting 5 is not able to solve it without "a lazzy King" code. Am I sure?

[d]k1b5/1p1p1p2/1PpPpP2/2B5/8/2p1p3/2PbP3/3K4 w - - 0 1

Now white King should go to take the Pawn f7.

How does White win here?

EDIT: OK, never mind.

EDIT: Not OK, I don't see how White wins this.

[Lyudmil Tsvetkov]

Peter, after a small modification of Blathy study (without h pawns), I think Sting 5 is not able to solve it without "a lazzy King" code. Am I sure?

[d]k1b5/1p1p1p2/1PpPpP2/2B5/8/2p1p3/2PbP3/3K4 w - - 0 1

Now white King should go to take the Pawn f7.

How does White win here?

EDIT: OK, never mind.

EDIT: Not OK, I don't see how White wins this.

With zugzwang.

The white bishop goes to c7, after which black is in zugzwang and should move its c6 and e6 pawns; after those reach c4 and e4 and the white bishop is on c7 again, something that it can achieve, as it has spare moves, black should sacrifice its bishop on either c1 or e1, after which..., after which... it is simple stalemate.

Edit: not certain if the above position is the real one, there were some other pawns on the h file.

Second edit - never mind.

Third edit - please disregard the second edit.

[Lyudmil Tsvetkov]

The original position with h3 and h7 pawns added is a win though - white executes exactly the same plan, but black has a spare move with its h pawn, that can go at most to h5, after which h5-h4 is a spare move, so no stalemate.

If black h7 goes to h4, it is taken and h3 promotes.

If it is black's turn though, it is a draw, as e5 draws for black, shutting the white bishop on the queen side; so Bd4 is the only winning move.

Man, do not these guys have some more difficult studies?

[zullil]

Peter, after a small modification of Blathy study (without h pawns), I think Sting 5 is not able to solve it without "a lazzy King" code. Am I sure?

[d]k1b5/1p1p1p2/1PpPpP2/2B5/8/2p1p3/2PbP3/3K4 w - - 0 1

Now white King should go to take the Pawn f7.

How does White win here?

EDIT: OK, never mind.

EDIT: Not OK, I don't see how White wins this.

With zugzwang.

The white bishop goes to c7, after which black is in zugzwang and should move its c6 and e6 pawns; after those reach c4 and e4 and the white bishop is on c7 again, something that it can achieve, as it has spare moves, black should sacrifice its bishop on either c1 or e1, after which..., after which... it is simple stalemate.

Yes, for example, the bishop goes to c1. If the king captures, then stalemate. If not, the bishop goes to a3 and then captures on d6.

So no win in Marek's modified study?

[Lyudmil Tsvetkov]

Peter, after a small modification of Blathy study (without h pawns), I think Sting 5 is not able to solve it without "a lazzy King" code. Am I sure?

[d]k1b5/1p1p1p2/1PpPpP2/2B5/8/2p1p3/2PbP3/3K4 w - - 0 1

Now white King should go to take the Pawn f7.

How does White win here?

EDIT: OK, never mind.

EDIT: Not OK, I don't see how White wins this.

With zugzwang.

The white bishop goes to c7, after which black is in zugzwang and should move its c6 and e6 pawns; after those reach c4 and e4 and the white bishop is on c7 again, something that it can achieve, as it has spare moves, black should sacrifice its bishop on either c1 or e1, after which..., after which... it is simple stalemate.

Yes, for example, the bishop goes to c1. If the king captures, then stalemate. If not, the bishop goes to a3 and then captures on d6.

So no win in Marek's modified study?

Well, the king might still try to overfly to g7 directly, to capture the f7 pawn - this will be a real lazy king.

[MikeGL]

Where is it from, Dann, must be a study?

Each Epd with annotations that tell where it came from:
[d]1Q4R1/8/P1b2p2/2p2k2/2P5/5p2/1r5P/4R1K1 b - - acd 44; acs 292; bm f2+; c0 "level: easy-1"; c3 "f2+"; c4 "(Krogius_EofCM) #1485 white_ahead"; ce -5592; dm 9; id "ECM.547"; pm f2+; pv f2+ Kf1 Bg2+ Rxg2 fxe1=Q+ Kxe1 Rxb8 a7 Rd8 Ke2 Ke4 Rg4+ Ke5 Rg7 f5 h4 Re8 Kf3 Kf6 Rb7 Ra8 Kf4 Kg6 Rc7 Rf8 h5+ Kh6 Rxc5 Re8 Ra5 Ra8 Ra4 Kg7 Ra6 Kh7 Kxf5 Rf8+ Ke4 Re8+ Kd5 Rd8+ Kc6 Rc8+ Kb7 Rf8 a8=Q Rf7+ Kc6 Kg7 Ra7 Rb7 Rxb7+ Kf6;
[d]8/kn4b1/P2B4/8/1Q6/6pP/1q4pP/5BK1 w - - acd 60; acs 285; bm Qxb2; c3 "Bc5+"; ce 224; dm 45; id "E_E_T 015 - D&L&L vs D&L&S"; pm Qxb2; pv Qxb2 Bxb2 axb7 gxf1=R+ Kxf1 g2+ Kxg2 Kxb7 Kf3 Kc6 Bf4 Kd7 Kg4 Ke6 Kg5 Kf7 Kh6 Bf6 Bg3 Bg7+ Kh7 Bc3 h4 Kf6 Bf2 Kf5 Kh6 Kf6 Be3 Be5 h3 Kf5 h5 Kf6 Kh7 Kf7 h6 Bb2 Bb6 Be5 Bc5 Bb2 Ba7 Be5 Bg1 Bb2 Be3 Be5 Bf2 Bb2 Bg1 Be5 Bb6 Bb2 Bc7 Bd4 Bg3 Bf6 Bd6 Bd4 Bf4 Bf6 Bg3 Bb2 Bf2 Be5 Ba7 Bf6 Bb8 Bd4 Bd6 Ke6 Bf4 Kf7 Bg5;
[d]8/pp4p1/4k1P1/3p4/3P4/2P5/4K2P/8 w - - acd 52; acs 599; bm c4; c0 "level: med-10"; c3 "c4"; c4 "(JenoBan_TofE) #193 white_wins"; ce -32607; dm 24; id "EGP 0214"; pm c4; pv c4 Kf6 c5 Kxg6 Ke3 Kf5 Kd3 a5 Ke3 a4 Kd3 a3 Kc2 Ke4 Kc3 a2 Kb2 Kxd4 Ka1 Kxc5 Kxa2 Kd4 Kb2 Ke4 Ka2 Kf4 Ka3 Kg4 Ka2 Kh3 Ka1 Kxh2;
[d]k1b5/1p1p1p1p/1PpPpP2/2B5/8/2p1p2P/2PbP3/3K4 w - - acd 127; acs 352; bm Bd4; ce 0; dm 56; id "yacpdb id 277997"; pm Bd4; pv Bd4 e5 Bxe5 Kb8 Bd4 h6 Be5 Ka8 Bd4 h5 Be5 Kb8 Bh2 Ka8 Be5;
[d]r4BK1/6P1/1p1p3P/3P4/2k5/p2N1q2/P7/8 w - - acd 54; acs 253; bm Ne5+; ce -32611; dm 24; id "yacpdb id 37311"; pm Ne5+; pv Ne5+ dxe5 h7 Ra7 h8=Q Qxd5+ Kh7 e4 Qg8 Qxg8+ Kxg8 e3 Bd6 e2 Bg3 Rxg7+ Kxg7 b5 Be1 b4 Bh4 b3 Be7 b2 Bxa3 e1=Q Bxb2;

Here is YACPDB:
http://www.yacpdb.org/
You can paste a position in the slot next to the "Add" button and then press "Search" and it will try to look up the position.

Very nice collection.
Thanks for posting this.
But I don't seem to get the point of the first position, [black to move] but black will lose in all variations.

[peter]

Sorry, Marek, didn't see your posting till now, but I don't see how White wins in your modification neither.
Black cannot be forced to take on e1 or c1, if White takes Bishop d2, its King still must not leave the now free black d- Pawn.
Did I miss something?

[MikeGL]

On deeper analysis, position 4 seems to be a forced mate in 68 with best defence from black. {Best defence for black simply meant avoiding any pawn move if possible}.

[Mate in 68]

[pgn]
[Event "Talkchess"]
[Site "Talkchess"]
[Date "2015.06.21"]
[Round "?"]
[White "2700"]
[Black "2700"]
[Result "1-0"]
[BlackElo "2700"]
[Time "02:40:14"]
[WhiteElo "2700"]
[TimeControl "600"]
[SetUp "1"]
[FEN "k1b5/1p1p1p1p/1PpPpP2/2B5/8/2p1p2P/2PbP3/3K4 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "118"]
[WhiteType "human"]
[BlackType "human"]

1. Bd4 Kb8 2. Be5 Ka8 3. Bf4 Kb8 4. Bh6 Ka8 5. Bg7 Kb8 6. Bf8 Ka8 7. Be7
Kb8 8. Bd8 Ka8 9. Bc7 c5 10. Bd8 Kb8 11. Be7 Ka8 12. Bf8 Kb8 13. Bh6 Ka8
14. Bg7 Kb8 15. Bf8 Ka8 16. Be7 Kb8 17. Bd8 Ka8 18. Bc7 c4 19. Bd8 Kb8 20.
Be7 Ka8 21. Bf8 Kb8 22. Bh6 Ka8 23. Bg7 Kb8 24. Bf8 Ka8 25. Be7 Kb8 26. Bd8
Ka8 27. Bc7 e5 28. Bd8 Kb8 29. Be7 Ka8 30. Bf8 Kb8 31. Bh6 Ka8 32. Bg7 Kb8
33. Bf8 Ka8 34. Be7 Kb8 35. Bd8 Ka8 36. Bc7 e4 37. Bd8 Kb8 38. Be7 Ka8 39.
Bf8 Kb8 40. Bh6 Ka8 41. Bg7 Kb8 42. Bf8 Ka8 43. Be7 Kb8 44. Bd8 Ka8 45. Bc7
h5 46. Bd8 Kb8 47. Be7 Ka8 48. Bf8 Kb8 49. Bh6 Ka8 50. Bg7 Kb8 51. Bf8 Ka8
52. Be7 Kb8 53. Bd8 Ka8 54. Bc7 h4 55. Bd8 Kb8 56. Be7 Ka8 57. Bf8 Kb8 58.
Bh6 Ka8 59. Bg5 Be1 60. Kxe1 {Mate in 8}
[/pgn]

If white pushes his white pawn to h4 anytime, it will be a draw because the point of holding h3 pawn is to force black to play his h7 pawn into h4 and that will be taken by white's D.S.Bishop and a winning h-passer for white.


edit: modifying the position without both h-pawn is just draw

[lech]

Sorry, Marek, didn't see your posting till now, but I don't see how White wins in your modification neither.
Black cannot be forced to take on e1 or c1, if White takes Bishop d2, its King still must not leave the now free black d- Pawn.
Did I miss something?

Indeed it looks like impossible to solve. Now I understand why Sting 5 solves the original version of Blathy study. The white Bishop makes all what is needed to win.

[MikeGL]

[d]8/kn4b1/P2B4/8/1Q6/6pP/1q4pP/5BK1 w - - acd 60; acs 285; bm Qxb2; c3 "Bc5+"; ce 224; dm 45;


what does 'c3 "Bc5+"'; on the above EPD code mean?
It seems 1.Bc5+ also wins so it's an alternative best move I think.