Interesting study for Stockfish

[acase]

This study will be solved fairly quickly by most engines, however that is not the point of this post.
It seems that Stockfish with NNUE enabled doesn't seem to solve it, but if you disabled NNUE and use classic evaluation it does solve this one. Stockfish is the only engine I have found so far where this is true, but there may be others.

here is the study:

[pgn][Event "Comm. Kalashnikov 50 JT (win studies)"]
[Site ""]
[Date "2011.06.25"]
[Round ""]
[White "Campioli=M"]
[Black ""]
[Result "1-0"]
[SetUp "1"]
[FEN "8/4p3/3p1p2/1PpP2N1/2P3K1/p1p1N3/rpPpQ3/kn5r w - - 0 1"]
[PlyCount "19"]
[EventDate "2011"]
[SourceDate "2005.01.24"]

1. Qd1 Rxd1 2. Nxd1 fxg5 3. b6 e5 4. b7 e4 5. b8=N e3 6. Kf3 g4+ 7. Ke2 g3 8. Nc6 g2 9. Na5 g1=Q 10. Nb3# 1-0[/pgn]

[Jouni]

No mate in 10 .

Analysis by Crystal 5 KWK bmi2:
...
1.Qd1 f5+ 2.Kf4 Rxd1 3.Nxd1 e5+ 4.dxe6 d5 5.e7 dxc4 6.Ke5 f4 7.e8Q f3 8.Ne4 f2 9.Ndxf2 d1Q 10.Nxd1 Nd2 11.Nexc3 b1R 12.Nxb1 Nxb1 13.Kd5 Rxc2 14.b6 Rd2+ 15.Kxc5 c3 16.b7 c2 17.Qh8+ Ka2 18.Nc3+ Nxc3 19.Qxc3 c1R 20.Qxc1 Rb2 21.Qc4+ Kb1 22.Qd3+ Ka2 23.Qe4 Rb3 24.Qb4 Rxb4 25.Kxb4 Kb2 26.b8Q Kc2 27.Kc4 Kd2 28.Qg3 Ke2 29.Kd4 Kd2 30.Qd3+ Kc1 31.Kc3 a2 32.Qf1#
+- (#32) Depth: 40/63 00:00:20 192mN, tb=69136

[acase]

No mate in 10 .

Analysis by Crystal 5 KWK bmi2:
...
1.Qd1 f5+ 2.Kf4 Rxd1 3.Nxd1 e5+ 4.dxe6 d5 5.e7 dxc4 6.Ke5 f4 7.e8Q f3 8.Ne4 f2 9.Ndxf2 d1Q 10.Nxd1 Nd2 11.Nexc3 b1R 12.Nxb1 Nxb1 13.Kd5 Rxc2 14.b6 Rd2+ 15.Kxc5 c3 16.b7 c2 17.Qh8+ Ka2 18.Nc3+ Nxc3 19.Qxc3 c1R 20.Qxc1 Rb2 21.Qc4+ Kb1 22.Qd3+ Ka2 23.Qe4 Rb3 24.Qb4 Rxb4 25.Kxb4 Kb2 26.b8Q Kc2 27.Kc4 Kd2 28.Qg3 Ke2 29.Kd4 Kd2 30.Qd3+ Kc1 31.Kc3 a2 32.Qf1#
+- (#32) Depth: 40/63 00:00:20 192mN, tb=69136

Actually it's a mate in 22.

[Vinvin]

No mate in 10 .

Analysis by Crystal 5 KWK bmi2:
...
1.Qd1 f5+ 2.Kf4 Rxd1 3.Nxd1 e5+ 4.dxe6 d5 5.e7 dxc4 6.Ke5 f4 7.e8Q f3 8.Ne4 f2 9.Ndxf2 d1Q 10.Nxd1 Nd2 11.Nexc3 b1R 12.Nxb1 Nxb1 13.Kd5 Rxc2 14.b6 Rd2+ 15.Kxc5 c3 16.b7 c2 17.Qh8+ Ka2 18.Nc3+ Nxc3 19.Qxc3 c1R 20.Qxc1 Rb2 21.Qc4+ Kb1 22.Qd3+ Ka2 23.Qe4 Rb3 24.Qb4 Rxb4 25.Kxb4 Kb2 26.b8Q Kc2 27.Kc4 Kd2 28.Qg3 Ke2 29.Kd4 Kd2 30.Qd3+ Kc1 31.Kc3 a2 32.Qf1#
+- (#32) Depth: 40/63 00:00:20 192mN, tb=69136

Actually it's a mate in 22.

Please give the mate in 22.

[Ajedrecista]

Hello Andrew:

Thank you very much for bring such nice problems here. I join Vincent in his request of the checkmate in 22 moves at most.

Once 1.- Qd1 is played, Chest 5.2 finds checkmate in 9 moves or shorter for any moves except 1.- ..., f5+, 1.- ..., Re1 and 1.- ..., Rxd1:

Code: Select all

FEN: 8/4p3/3p1p2/1PpP2N1/2P3K1/p1p1N3/rpPp4/kn1Q3r b - - 1 1

ChestUCI:
FEN: 8/4p3/3p1p2/1PpP2N1/2P3K1/p1p1N3/rpPp4/kn1Q3r b - -   (8+12)
Stellungs-Analyse:  S:3/15
Suche nach Matt in -9 ...  (Hash=64MB)
Suche abgeschlossen ...  (Zeit=83.04s)
Kein Matt in -9 gefunden !  (01:23)
  6/9	01:23	  90.661.840	1.091.745	-M6	Rh1h5 Kg4xh5 f6f5 b5b6 e7e6 d5xe6 f5f4 Ng5e4 f4f3 Ne4xc3 f3f2 Qd1xb1+
  6/9	01:23	  90.661.840	1.091.745	-M6	Rh1f1 Ne3xf1 f6f5+ Kg4h4 e7e6 Ng5f3 f5f4 Nf3xd2 c3xd2 Nf1xd2 f4f3 Nd2b3+
  7/9	01:23	  90.661.840	1.091.745	-M7	Rh1h7 Ng5xh7 f6f5+ Ne3xf5 e7e6 Nh7f6 e6xf5+ Kg4h4 f5f4 Nf6e4 f4f3 Ne4xc3 f3f2 Qd1xb1+
  7/9	01:23	  90.661.840	1.091.745	-M7	Rh1h6 Ng5e4 f6f5+ Ne3xf5 Rh6g6+ Kg4h3 e7e6 Ne4xc3 Rg6g1 Qd1xg1 d2d1Q Qg1xd1 e6e5 Qd1xb1+
  7/9	01:23	  90.661.840	1.091.745	-M7	Rh1h3 Ng5xh3 f6f5+ Ne3xf5 e7e6 Nh3f2 e6xf5+ Kg4h4 f5f4 Nf2e4 f4f3 Ne4xc3 f3f2 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1h8 Ng5e4 f6f5+ Ne3xf5 Rh8g8+ Kg4h5 Rg8h8+ Nf5h6 Rh8f8 Ne4xc3 Rf8f1 Qd1xf1 d2d1Q+ Qf1xd1 e7e6 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1h2 Ng5e4 f6f5+ Ne3xf5 e7e6 d5xe6 Rh2g2+ Nf5g3 d6d5 Ne4xc3 Rg2g1 Qd1xg1 d2d1Q+ Qg1xd1 d5d4 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	e7e5 Qd1xh1 d2d1Q+ Qh1xd1 f6xg5 Ne3f5 e5e4 Nf5g3 e4e3 Kg4h5 g5g4 Ng3e2 g4g3 Ne2xc3 g3g2 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	e7e6 Qd1xh1 f6f5+ Ne3xf5 d2d1Q+ Qh1xd1 e6xd5 Ng5e6 d5xc4 Nf5e3 d6d5 Ne6xc5 d5d4 Ne3xc4 d4d3 Nc5b3+
  8/9	01:23	  90.661.840	1.091.745	-M8	f6xg5 Qd1xh1 d2d1Q+ Qh1xd1 e7e6 d5xe6 d6d5 c4xd5 c5c4 Kg4h5 g5g4 Ne3xc4 g4g3 Nc4a5 g3g2 Na5b3+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1h4+ Kg4xh4 f6xg5+ Kh4g4 e7e6 d5xe6 d6d5 e6e7 d5xc4 Kg4h5 g5g4 Ne3d5 g4g3 Nd5xc3 g3g2 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1g1+ Qd1xg1 d2d1Q+ Qg1xd1 f6xg5 Qd1g1 e7e6 d5xe6 d6d5 c4xd5 c5c4 Ne3f1 Nb1d2 Nf1xd2+ b2b1Q Qg1xb1+
  9/9	01:23	  90.661.840	1.091.745	+M0	Rh1xd1
  9/9	01:23	  90.661.840	1.091.745	+M0	Rh1e1
  9/9	01:23	  90.661.840	1.091.745	+M0	f6f5+

If 1.- ..., Rxd1; 2.- Nxd1 is played, Chest 5.2 also finds checkmate in 9 moves at most from this point. From what I have been analyzing without success, 1.- ..., f5+ should be the longest DTM move.

A lucky run with SF 15.1 after 1.- Qd1, Re1; 2.- Nf3, Rxe3 (still to prove if it is the best move here); 3.- Kf4 returns a checkmate in 11 moves from this point (3.- ..., Re1, 3.- ..., Re5 and 3.- ..., Rd3).

Regards from Spain.

Ajedrecista.

[Paloma]

> If 1.- ..., Rxd1; 2.- Nxd1 is played, Chest 5.2 also finds checkmate in 9 moves at most from this point. From what I have been analyzing without success, 1.- ..., f5+ should be the longest DTM move.

Yes, 1...f5 is the best.
2.Kf4 Rh4+ 3.Kxf5 is 17#
2.Kf4 Rxd1 3.Nxd1 is 26# e5+ 4.dxe6 d5 5.e7 (24#) dxc4 6.Ke5 f4 7.Ne4 f3 8.e8Q f2 9.Ndxf2 is 20#

but what about 2.Kf4 e5 - ...Rh6 - ...Re1

[Paloma]

Ah, 2...Re1 3.Nf3 10#
2...Rh6 3.Nf3 12#
2...e5 3.dxe6 Rxd1 4.Nxd1 d5 5.e7 24#

[acase]

Vincent and Jesus, I think I got this one confused with another study I was looking at around the same time which actually was a mate in 22 or perhaps there were some sub-optimal moves in the analysis I had at the time.

Here is the study I may have confused it with,
This was posted by our good friend and excellent study composer Arpad Rusz a few years ago.

[pgn][Event "StrateGems"]
[Site "?"]
[Date "2015.??.??"]
[Round "?"]
[White "Wieland Bruch (after G .Heathcote)"]
[Black "?"]
[Result "1-0"]
[BlackElo "2400"]
[WhiteElo "2000"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "r7/1QpnN1Kp/p3P1b1/Nn1P1p2/3k3p/p4BP1/1rPPp2q/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "13"]
[WhiteType "program"]
[BlackType "program"]

1. d6 Nb6 2. dxc7 Nd6 3. Qc6 Ne4 (3. .. Ndc4 4. Qb5 $1 Rxb5 5. Nec6+ Kc5 6.
Nb7#) (3. .. Ne8+ 4. Kh6 {+M17/41 94 Stockfish_10_x64_bmi2} hxg3+ 5. Kg5
Qh4+ 6. Kxh4 Ke5 7. Qc5+ Kxe6 8. Nxg6 Rb4+ 9. Qxb4 Nd6 10. Nb7 Nbc4 11.
Nd8+ Kd7 12. Qa4+ Kxc7 13. Ne6+ Kb6 14. Ne7 Ne5 15. Qd4+ Ka5 16. Qxe5+ Nb5
17. Nc6+ Kb6 18. Qc5+ Kb7 19. Ne5+ Kb8 20. Nd7#) (3. .. Ndc4 4. Qb5
{+M19/47 9 The Huntsman 1 avx2} Rxc2 5. Qb3 Ke5 6. Nec6+ Kxe6 7. Nxc4 Rxc4
8. Qxb6 Qxg3 9. Nd4+ Kd7 10. Qe6+ Kxc7 11. Qxc4+ Kd8 12. Qd5+ Ke8 13. Qxa8+
Kd7 14. Qc6+ Kd8 15. Qd5+ Ke8 16. Qe6+ Kd8 17. Nc6+ Kc7 18. Qe7+ Kb6 19.
Qb4+ Kc7 20. Qb8+ Kd7 21. Qd8+ Ke6 22. Bd5#) 4. Nb7 e1=Q (4. .. Ke5 5. Qd6+
$1 Nxd6 6. Nc6+ Kxe6 7. Nc5#) (4. .. Rb5 5. Qc3+ $1 Nxc3 6. Nc6+ Kc4 7.
d3#) (4. .. Qxg3 5. Qd5+ $1 Nxd5 6. Nc6+ Kc4 7. Bxe2+ Qd3 8. Bxd3#) 5. Qc5+
$1 Nxc5 6. Nc6+ Kc4 7. Nd6# 1-0
[/pgn]



So, back to the Campioli study. I can't find a mate in 22, I let The Huntsman look at it and it did find a mate in 28 instead.



[pgn][Event "Comm. Kalashnikov 50 JT (win studies)"]
[Site "?"]
[Date "2011.06.25"]
[Round "?"]
[White "Campioli=M"]
[Black "?"]
[Result "1-0"]
[BlackElo "2400"]
[WhiteElo "2000"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "8/4p3/3p1p2/1PpP2N1/2P3K1/p1p1N3/rpPpQ3/kn5r w - - 0 1"]
[Termination "normal"]
[PlyCount "19"]
[WhiteType "program"]
[BlackType "program"]

1. Qd1 (1. Qd1 {+M28/108 969 The Huntsman 1 avx2} f5+ 2. Kf4 e5+ 3. e6 Rxd1
4. Nxd1 d5 5. e7 dxc4 6. Ke5 f4 7. e8=Q f3 8. Ne4 f2 9. Ndxf2 d1=N 10. Nxd1
Nd2 11. Nexc3 b1=R 12. Nxb1 Nxb1 13. Kd6 c3 14. Kxc5 Nd2 15. b6 Rb2 16.
Nxc3 Rxc2 17. Qe5 Rb2 18. Qe1+ Nb1 19. Nd1 Rc2+ 20. Kb4 Ka2 21. b7 Rg2 22.
Qe6+ Ka1 23. b8=Q Nd2 24. Qa8 Rg4+ 25. Qxg4 Kb1 26. Qxa3 Kc2 27. Qc3+ Kb1
28. Qb2#) 1. .. Rxd1 (1. .. f5+ 2. Kf4 Rxd1 3. Nxd1 e5+ 4. dxe6 d5 5. cxd5
c4 6. Ke5 f4 7. e7 f3 8. e8=Q f2 9. Nxf2 d1=B 10. Nxd1 Nd2 11. Nxc3 b1=Q
12. Nxb1 Kxb1 13. Qf8 c3 14. Kd4 Kxc2 15. Qb4 Nb3+ 16. Ke5) 2. Nxd1 fxg5 3.
b6 e5 4. b7 e4 5. b8=N e3 6. Kf3 g4+ 7. Ke2 g3 8. Nc6 g2 9. Na5 g1=Q 10.
Nb3# 1-0[/pgn]


And speaking of Arpad, check out this fine study he composed and released in 2019, although I think they have his country wrong (I believe he is from Hungary, unless of course I am mistaken). All of the engines seem to be clueless on the eval (except for Crystal 5 KWK so far) until you go a few moves deep into the main line, although the engines do get the correct moves in the main line they give it a 0.00 score until a few moves are made.

[pgn][Event "Mikitovics 70 JT 2019"]
[Site ""]
[Date ""]
[Round ""]
[White "6th Árpád Rusz, Romania"]
[Black ""]
[Result "1-0"]
[SetUp "1"]
[FEN "1K2b3/4q1p1/pk2p3/pPN1p1pQ/P3P1p1/B5P1/8/7R w - - 0 1"]
[PlyCount "39"]
[EventDate "2018"]

1. Nd7+ $1 Qxd7 2. Bc5+ $1 Kxc5 3. Rc1+ Kb6 4. Rc6+ $1 Qxc6 5. bxc6 Bxh5 6. c7 {Is it over? Not yet! Black has a counterplay by setting a stalemate trap!} g6 $1 {During the introduction, White has lost a Knight, a Bishop, a Rook, and a Queen. Will we see some kind of a Phoenix promotion now, right? No!} 7. Kc8 $3 {anti-Phoenix} (7. c8=Q $2 {echo stalemate}) 7... Kc6 8. Kd8 Kd6 $1 {An echo stalemate trap!} 9. Ke8 $3 {The Pawn is also sacrified! Does White really want to win this endgame?} (9. c8=Q $2 {echo stalemate}) (9. Kc8 $6 Kc6 10. Kb8 Kb6 {positional draw}) 9... Kxc7 10. Ke7 {mutual zugzwang - Position A} Kc8 $1 ( 10... Kc6 11. Kxe6 Kc7 12. Kxe5 Kd7 13. Kf6 $18) 11. Kd6 $1 ({Thematic try:} 11. Kxe6 $2 Kd8 12. Kd6 (12. Kxe5 Ke7 13. Kd5 Kd7 14. e5 Ke7 15. e6 Ke8 16. Kd6 Kd8 17. e7+ Ke8 18. Ke6 {stalemate}) 12... Ke8 13. Kc6 Ke7 {positional draw} 14. Kc7 Ke6 $1 {The e6 pawn is missing!} 15. Kc6 Ke7 {positional draw}) 11... Kd8 12. Kc6 Ke7 (12... Kc8 13. Kb6 Kb8 14. Kxa6 $18) 13. Kc7 $1 {The kings have interchanged their places! - Position B} (13. Kb6 $2 Kd6 14. Kxa5 Kc5 15. Kxa6 Kd4 $11) 13... Ke8 14. Kb6 Kd7 15. Kxa5 $1 (15. Kxa6 $2 Kc6 16. Kxa5 Kc5 17. Ka6 Kd4 $11) 15... Kc6 16. Kxa6 Kc5 17. a5 Kc6 (17... Kd4 18. Kb5 (18. Kb6) 18... Kxe4 19. a6 Kf3 20. a7 Kxg3 21. a8=Q Kh2 22. Qa2+ $18) 18. Ka7 Kc7 19. a6 {mutual zugzwang} Kc8 20. Kb6 (20. Ka8 $6 Kc7 21. a7 $2 Kc8 {stalemate}) 1-0[/pgn]

[Uri Blass]

Hello Andrew:

Thank you very much for bring such nice problems here. I join Vincent in his request of the checkmate in 22 moves at most.

Once 1.- Qd1 is played, Chest 5.2 finds checkmate in 9 moves or shorter for any moves except 1.- ..., f5+, 1.- ..., Re1 and 1.- ..., Rxd1:

Code: Select all

FEN: 8/4p3/3p1p2/1PpP2N1/2P3K1/p1p1N3/rpPp4/kn1Q3r b - - 1 1

ChestUCI:
FEN: 8/4p3/3p1p2/1PpP2N1/2P3K1/p1p1N3/rpPp4/kn1Q3r b - -   (8+12)
Stellungs-Analyse:  S:3/15
Suche nach Matt in -9 ...  (Hash=64MB)
Suche abgeschlossen ...  (Zeit=83.04s)
Kein Matt in -9 gefunden !  (01:23)
  6/9	01:23	  90.661.840	1.091.745	-M6	Rh1h5 Kg4xh5 f6f5 b5b6 e7e6 d5xe6 f5f4 Ng5e4 f4f3 Ne4xc3 f3f2 Qd1xb1+
  6/9	01:23	  90.661.840	1.091.745	-M6	Rh1f1 Ne3xf1 f6f5+ Kg4h4 e7e6 Ng5f3 f5f4 Nf3xd2 c3xd2 Nf1xd2 f4f3 Nd2b3+
  7/9	01:23	  90.661.840	1.091.745	-M7	Rh1h7 Ng5xh7 f6f5+ Ne3xf5 e7e6 Nh7f6 e6xf5+ Kg4h4 f5f4 Nf6e4 f4f3 Ne4xc3 f3f2 Qd1xb1+
  7/9	01:23	  90.661.840	1.091.745	-M7	Rh1h6 Ng5e4 f6f5+ Ne3xf5 Rh6g6+ Kg4h3 e7e6 Ne4xc3 Rg6g1 Qd1xg1 d2d1Q Qg1xd1 e6e5 Qd1xb1+
  7/9	01:23	  90.661.840	1.091.745	-M7	Rh1h3 Ng5xh3 f6f5+ Ne3xf5 e7e6 Nh3f2 e6xf5+ Kg4h4 f5f4 Nf2e4 f4f3 Ne4xc3 f3f2 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1h8 Ng5e4 f6f5+ Ne3xf5 Rh8g8+ Kg4h5 Rg8h8+ Nf5h6 Rh8f8 Ne4xc3 Rf8f1 Qd1xf1 d2d1Q+ Qf1xd1 e7e6 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1h2 Ng5e4 f6f5+ Ne3xf5 e7e6 d5xe6 Rh2g2+ Nf5g3 d6d5 Ne4xc3 Rg2g1 Qd1xg1 d2d1Q+ Qg1xd1 d5d4 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	e7e5 Qd1xh1 d2d1Q+ Qh1xd1 f6xg5 Ne3f5 e5e4 Nf5g3 e4e3 Kg4h5 g5g4 Ng3e2 g4g3 Ne2xc3 g3g2 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	e7e6 Qd1xh1 f6f5+ Ne3xf5 d2d1Q+ Qh1xd1 e6xd5 Ng5e6 d5xc4 Nf5e3 d6d5 Ne6xc5 d5d4 Ne3xc4 d4d3 Nc5b3+
  8/9	01:23	  90.661.840	1.091.745	-M8	f6xg5 Qd1xh1 d2d1Q+ Qh1xd1 e7e6 d5xe6 d6d5 c4xd5 c5c4 Kg4h5 g5g4 Ne3xc4 g4g3 Nc4a5 g3g2 Na5b3+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1h4+ Kg4xh4 f6xg5+ Kh4g4 e7e6 d5xe6 d6d5 e6e7 d5xc4 Kg4h5 g5g4 Ne3d5 g4g3 Nd5xc3 g3g2 Qd1xb1+
  8/9	01:23	  90.661.840	1.091.745	-M8	Rh1g1+ Qd1xg1 d2d1Q+ Qg1xd1 f6xg5 Qd1g1 e7e6 d5xe6 d6d5 c4xd5 c5c4 Ne3f1 Nb1d2 Nf1xd2+ b2b1Q Qg1xb1+
  9/9	01:23	  90.661.840	1.091.745	+M0	Rh1xd1
  9/9	01:23	  90.661.840	1.091.745	+M0	Rh1e1
  9/9	01:23	  90.661.840	1.091.745	+M0	f6f5+

If 1.- ..., Rxd1; 2.- Nxd1 is played, Chest 5.2 also finds checkmate in 9 moves at most from this point. From what I have been analyzing without success, 1.- ..., f5+ should be the longest DTM move.

A lucky run with SF 15.1 after 1.- Qd1, Re1; 2.- Nf3, Rxe3 (still to prove if it is the best move here); 3.- Kf4 returns a checkmate in 11 moves from this point (3.- ..., Re1, 3.- ..., Re5 and 3.- ..., Rd3).

Regards from Spain.

Ajedrecista.

Chest verified that after 1.Qd1 Re1 2.Nf3 the best move is Rxe3

FEN: 8/4p3/3p1p2/1PpP4/2P3K1/p1p1NN2/rpPp4/kn1Qr3 b - - 3 2

ChestUCI:
FEN: 8/4p3/3p1p2/1PpP4/2P3K1/p1p1NN2/rpPp4/kn1Qr3 b - - (8+12)
Stellungs-Analyse: S:3/9
Suche nach Matt in -126 ... (Hash=2044MB)
Suche abgeschlossen ... (Zeit=2356.35s)
Matt in -12 gefunden ! (9 Lösungen in 39:16)
5/12 39:16 3,754,054k 1,593k -M5 Re1-f1 Ne3xf1 f6-f5+ Kg4-h4 f5-f4 Nf3xd2 c3xd2 Nf1xd2 f4-f3 Nd2-b3+
5/12 39:16 3,754,054k 1,593k -M5 Re1-g1+ Nf3xg1 f6-f5+ Kg4-h4 f5-f4 Ng1-e2 f4-f3 Ne2xc3 f3-f2 Qd1xb1+
6/12 39:16 3,754,054k 1,593k -M6 Re1-h1 Nf3xd2 f6-f5+ Kg4-g5 Rh1-g1+ Qd1xg1 c3xd2 c2-c3 d2-d1Q Qg1xd1 f5-f4 Ne3-c2+
7/12 39:16 3,754,054k 1,593k -M7 Re1-e2 Qd1xe2 f6-f5+ Ne3xf5 d2-d1Q Qe2xd1 e7-e5 b5-b6 e5-e4 Nf3-d4 c5xd4 Nf5xd4 e4-e3 Nd4-b3+
9/12 39:16 3,754,054k 1,593k -M9 Re1xd1 Ne3xd1 f6-f5+ Kg4-h4 f5-f4 b5-b6 e7-e6 d5xe6 d6-d5 c4xd5 c5-c4 Nf3-e5 f4-f3 Ne5xc4 f3-f2 Nc4-a5 f2-f1Q Na5-b3+
10/12 39:16 3,754,054k 1,593k -M10 e7-e5 Nf3xe1 f6-f5+ Ne3xf5 d2xe1Q Qd1xe1 e5-e4 b5-b6 e4-e3 b6-b7 e3-e2 Nf5-d4 c5xd4 b7-b8N d4-d3 Nb8-c6 d3-d2 Nc6-a5 d2-d1Q Na5-b3+
10/12 39:16 3,754,054k 1,593k -M10 f6-f5+ Kg4-f4 e7-e5+ d5xe6/ep d6-d5 Nf3xe1 d2xe1Q Qd1xe1 d5-d4 e6-e7 d4xe3 e7-e8Q e3-e2 Kf4-g5 f5-f4 Qe8-h8 f4-f3 Qh8-h1 f3-f2 Qe1xb1+
11/12 39:16 3,754,054k 1,593k -M11 e7-e6 Nf3xe1 f6-f5+ Kg4-h4 d2xe1Q+ Qd1xe1 f5-f4 Ne3-f1 f4-f3 Nf1-e3 f3-f2 Qe1-f1 e6-e5 Ne3-f5 e5-e4 Nf5xd6 e4-e3 Nd6-b7 e3-e2 Nb7-a5 e2-e1Q Na5-b3+
12/12 39:16 3,754,054k 1,593k -M12 Re1xe3 Kg4-f4 Re3-d3 b5-b6 e7-e5+ d5xe6/ep Rd3-d4+ Nf3xd4 c5xd4 Kf4-e4 d4-d3 Ke4xd3 f6-f5 e6-e7 f5-f4 e7-e8Q f4-f3 Qe8-h8 f3-f2 Qh8-h1 f2-f1Q+ Qh1xf1 d6-d5 Qd1xb1+