Complex Puzzle

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Nordlandia
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Re: Complex Puzzle (first is draw)

Post by Nordlandia »

Image

Code: Select all

6N1/1k3B1b/3Kp3/1N6/8/8/6r1/6b1 w - - 0 0
Possible cook, black is ahead in the starting position according Stockfish.
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Nordlandia
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Re: Complex Puzzle (first is draw)

Post by Nordlandia »

Image
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/6b1/1P2R3/8/8/K2k1b2/8/n7 w - - 0 1"]
[PlyCount "140"]

1. Rd6+ Kc2 2. Re6 Nb3 3. Kb4 Nd4 4. Re3 Kd2 5. Re8 Bf6 6. Rc8 Nc6+ 7. Kb5 Nd8
8. Rc7 Bb7 9. Rd7+ Kc3 10. Rd6 Be7 11. Rd1 Nf7 12. Rc1+ Kd4 13. Rd1+ Ke5 14.
Re1+ Kd6 15. Rd1+ Ke6 16. Re1+ Kd7 17. Rd1+ Nd6+ 18. Kc5 Ke6 19. Re1+ Ne4+ 20.
Kc4 Bh4 21. Ra1 Nd6+ 22. Kb4 Bf2 23. Kc3 Bxb6 24. Rb1 Bc5 25. Ra1 Ke5 26. Ra2
Ne4+ 27. Kd3 Kd5 28. Ra1 Bd4 29. Re1 Ba6+ 30. Kc2 Bc8 31. Kd3 Nc5+ 32. Kc2 Bd7
33. Kd1 Kc4 34. Ke2 Bg4+ 35. Kf1 Bf3 36. Re7 Kd3 37. Re8 Ne4 38. Rd8 Ke3 39.
Re8 Bc3 40. Kg1 Ke2 41. Rc8 Bg4 42. Rd8 Ng5 43. Rg8 Bd2 44. Re8+ Be6 45. Kg2
Bc3 46. Rf8 Bh3+ 47. Kg3 Be1+ 48. Kh2 Bb4 49. Rg8 Bd6+ 50. Kh1 Ne4 51. Rg2+ Kf3
52. Kg1 Be6 53. Rb2 Be5 54. Rc2 Bd4+ 55. Kf1 Bc3 56. Kg1 Bd2 57. Rc6 Bd7 58.
Rg6 Be3+ 59. Kh1 Nf2+ 60. Kg1 Ng4+ 61. Kf1 Bf5 62. Rc6 Bf2 63. Rc3+ Ne3+ 64.
Rxe3+ Bxe3 65. Ke1 Bc2 66. Kf1 Bd2 67. Kg1 Kg3 68. Kf1 Bd3+ 69. Kg1 Be3+ 70.
Kh1 Be4# {Lomonosov Tablebases.} *

[/pgn]
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Nordlandia
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Re: Complex Puzzle (first is draw)

Post by Nordlandia »

[d]n7/1pk1P1N1/p5NR/K2P2p1/1P2p3/1p6/p2P4/8 w - - 0 1

This one involves underpromotion :D
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Complex Puzzle (first is draw)

Post by Vinvin »

Nordlandia wrote:Image

Code: Select all

6N1/1k3B1b/3Kp3/1N6/8/8/6r1/6b1 w - - 0 0
Possible cook, black is ahead in the starting position according Stockfish.
SF prefers 1...Bc2, after that it gives very low score for white :

Code: Select all

FEN: 8/1k3B2/3KpN2/1N6/8/8/2b3r1/6b1 w - - 2 2

Stockfish_16041800_x64_modern:
...
 31/58	11:33	 7 169 816k	10 338k	-6,74	2.Kxe6 Re2+ 3.Kd6 Kb6 4.Nd5+ Ka5 5.Be6 Rd2 6.Nbc7 Bh2+ 7.Ke7 Bb3 8.Kf6 Bg3 9.Ke7 Be5 10.Kf7 Ba2 11.Ke7 Rh2 12.Kf7 Re2 13.Ke7 Rd2 14.Kf7 Bd6 15.Kg6 Bb3 16.Kf5 Re2 17.Kf6 Rf2+ 18.Kg6 Bc4 19.Kg5 Be5 20.Kg4 Bb3 21.Kh5 Rg2 22.Bg4 Rc2 23.Bf5 Rc5 24.Ne6 Rxd5 25.Kg4 Bc4 26.Kg5 Rd2
 31/58	11:33	 7 169 816k	10 338k	-5,41	2.Be8 Re2 3.Kd7 Kb6 4.Nd6 Bc5 5.Nc8+ Ka5 6.Kc7 Bd4 7.Nd7 Be3 8.Kd6 Bf4+ 9.Ke7 Bg5+ 10.Kf7 e5 11.Kg7 Rf2 12.Nb8 Kb4 13.Na6+ Kc3 14.Nd6 e4 15.Nb5+ Kb2 16.Nb4 Bb3 17.Bh5 Bf6+ 18.Kh7 Rg2 19.Be8 Rg1 20.Nd6 e3 21.Ne4 Rh1+ 22.Kg6 e2 23.Nd3+ Kc2
 31/58	11:33	 7 169 816k	10 338k	-4,24	2.Nc3 Rg7 3.Bh5 Bf5 4.Ke5 Kb6 5.Ne2 Bh2+ 6.Kd4 Kb5 7.Ke3 Kb4 8.Bf3 Ra7 9.Nh5 Ra3+ 10.Kf2 Bc7 11.Nhf4 Ra2 12.Kg1 Bb6+ 13.Kh2 Kc5 14.Nh5 Bc7+ 15.Kg1 Bd3 16.Nc3 Ra3 17.Ne2 Kb4 18.Nef4 Bc4 19.Kg2 Ra2+ 20.Kh3 Kc5 21.Kg4 e5 22.Ng6 Bd3 23.Kg5 Bd8+ 24.Kh6 e4 25.Bg4 Ra6
---------------------------------------------------------------------------
 32/58	17:38	 11 181 380k	10 564k	-7,00	2.Kxe6 Re2+ 3.Kd6 Kb6 4.Nd5+ Ka5 5.Be6 Rd2 6.Nbc7 Bh2+ 7.Ke7 Bb3 8.Kf6 Bg3 9.Ke7 Be5 10.Kf7 Ba2 11.Ke7 Rh2 12.Kf7 Re2 13.Ke7 Rd2 14.Kf7 Bd6 15.Kg6 Bb3 16.Kf5 Re2 17.Kf6 Rf2+ 18.Kg5 Be5 19.Kg4 Re2 20.Kf3 Bd1 21.Bg4 Bxc7 22.Nc3 Re1+ 23.Kf2 Re5 24.Bh3 Bb3 25.Kf1 Kb4
 32/58	17:38	 11 181 380k	10 564k	-6,80	2.Be8 Re2 3.Kd7 Kb6 4.Nd6 Bc5 5.Nc4+ Kb5 6.Nd6+ Kb4 7.Kc7 Bd4 8.Nd7 Be3 9.Nc8 Bf4+ 10.Kd8 e5 11.Bf7 e4 12.Ncb6 Bg5+ 13.Kc8 Rf2 14.Nd5+ Ka3 15.Bh5 e3 16.Nc3 Bd3 17.Bd1 Ba6+ 18.Kc7 e2 19.Bxe2 Bxe2 20.Nb6 Bd8+ 21.Kb7 Bf3+ 22.Ka6
 32/58	17:38	 11 181 380k	10 564k	-4,97	2.Nc3 Rg7 3.Bh5 Bf5 4.Ke5 Kb6 5.Ne2 Bh2+ 6.Kd4 Kb5 7.Ke3 Kb4 8.Bf3 Ra7 9.Nh5 Ra3+ 10.Kf2 Bc7 11.Nhf4 Ra2 12.Kg1 Bb6+ 13.Kh2 Kc5 14.Kg1 e5 15.Ng3 Bc2 16.Nfe2 e4 17.Bg4 Kb4+ 18.Kf1 Bd3 19.Bh5 Bc7 20.Nf5 e3 21.Nfd4 Ra6 22.Kg2 Rh6 23.Bf3 Kc4 24.Kf1 Ra6 25.Kg2 Be5 26.Nc6
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Nordlandia
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Re: Complex Puzzle (first is draw)

Post by Nordlandia »

[d]5r1k/1p1p1pR1/r2p1pPP/1K4PP/8/8/2P1P3/8 w - - 0 0

Try this one :)
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Nordlandia
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Re: Complex Puzzle (first is draw)

Post by Nordlandia »

Image

Code: Select all

r7/1pN1pk2/1P5r/1P1pPPp1/1nB1p3/4pPP1/3PP3/R3K2R w KQ - 0 0
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Nordlandia
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Re: Complex Puzzle (first is draw)

Post by Nordlandia »

[pgn][Event "1.p All-Russian Ty"]
[Site "?"]
[Date "1971.??.??"]
[Round "?"]
[White "Khortov=V"]
[Black "(+0411.75a4a2)"]
[Result "1-0"]
[SetUp "1"]
[FEN "6N1/p7/P1p1p1p1/P1P3P1/Kpr1P1R1/5PP1/k6B/8 w - - 0 1"]
[PlyCount "67"]
[EventDate "1971.??.??"]

{EG#02026} 1. e5 Rxg4 2. f4 $1 b3 3. Nf6 b2 4. Ne4 Kb1 $1 5. Nc3+ Kc1 6. Kb4 $1
b1=Q+ 7. Nxb1 Kxb1 8. Kb3 $1 Kc1 9. Kc3 Kd1 10. Kd3 Ke1 11. Ke3 Rxg5 12. fxg5
$1 (12. g4 $2 Rxg4 13. Kf3 Rg5 $1 14. fxg5) 12... Kf1 13. Kf3 Ke1 14. Kg2 Ke2
15. Bg1 Ke1 16. Be3 Ke2 17. Bf2 Kd3 18. Kf1 Kd2 19. Bg1 Kd3 20. Ke1 Kc2 21. Ke2
Kc1 22. Be3+ Kc2 23. Bd2 Kb2 24. Kd1 Kb1 25. Bc3 Ka2 26. Kc2 Ka3 27. Kb1 Kb3
28. Bb2 Kc4 29. Kc2 Kb4 30. g4 $1 Kc4 31. Bc3 Kb5 32. Kb3 Kxa6 33. Ka4 Kb7 34.
a6+ $1 1-0

[/pgn]

[d]8/p7/P1p1p1p1/P1P1P1P1/8/5KP1/7B/4k3 w - - 0 14
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Complex Puzzle (first is draw)

Post by Vinvin »

Nordlandia wrote:[d]5r1k/1p1p1pR1/r2p1pPP/1K4PP/8/8/2P1P3/8 w - - 0 0

Try this one :)
2 run with a recent Stockfish (i7-6*4GHz) : 7m51s and 14m06s :

FEN: 5r1k/1p1p1pR1/r2p1pPP/1K4PP/8/8/2P1P3/8 w - - 0 1

Code: Select all

Stockfish_16041800_x64_modern:
...
 51/8	02:53	 2 446 720k	14 137k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
 52/8	03:25	 2 850 704k	13 880k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
 53/8	06:44	 5 581 505k	13 789k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
 54/8	07:18	 6 058 137k	13 808k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
 55/70+	07:51	 6 528 934k	13 836k	+0,06	1.Rh7+
 55/70+	07:52	 6 544 150k	13 838k	+0,13	1.Rh7+
 55/88+	13:31	 11 314 579k	13 944k	+8,82	1.Rh7+

Code: Select all

 Stockfish_16041800_x64_modern:
...
  53/9	06:21	 5 094 414k	13 350k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
  54/9	07:32	 5 999 213k	13 257k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
  55/9	08:58	 7 116 152k	13 209k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
  56/9	11:03	 8 712 906k	13 138k	 0,00	1.Rxf7 Rc8 2.Rh7+ Kg8 3.Rg7+ Kh8 4.Rh7+
  57/67+	14:06	 11 222 548k	13 261k	+0,06	1.Rh7+
  57/67+	14:06	 11 224 939k	13 262k	+0,13	1.Rh7+
  57/67+	15:20	 12 267 381k	13 329k	+4,03	1.Rh7+
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Nordlandia
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Re: Complex Puzzle (first is draw)

Post by Nordlandia »

[d]6q1/3pBRp1/3p4/3p1p1K/3pkp2/1N6/2P1p3/3N4 w - - 0 0

Author claims mate in 19 but from let's check database someone calculated #14.

Task for matefinder :)
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yurikvelo
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Re: Complex Puzzle (first is draw)

Post by yurikvelo »

[pgn]
[Event "Computer chess game"]
[SetUp "1"]
[FEN "6q1/3pBRp1/3p4/3p1p1K/3pkp2/1N6/2P1p3/3N4 w - - 0 1"]
[Termination "unterminated"]
[PlyCount "3"]


1. Nd2+ Ke5 2. Nf3+ Ke6 3. Ng5+ Ke5 4. Kg6 d3 (4. .. Qe8 5. Nf2) 5. c3 *[/pgn]
Ke5 only legal move after Nf3+ and Ng5+

Code: Select all

+M12	2. ... Ke6 3.Ng5+ Ke5 4.Kg6 d3 5.c3 Qe8 6.Nf2 e1N 7.Kxg7 f3 8.Ngh3 d4 9.c4 d5 10.c5 Qxf7+ 11.Kxf7 f4 12.Kg6 d6 13.Ng5 dxc5 14.Ng4#
+M12	2. ... Ke4 3.Ng5+ Ke5 4.Kg6 d3 5.c3 Qe8 6.Nf2 e1N 7.Kxg7 f3 8.Ngh3 d4 9.c4 d5 10.c5 Qxf7+ 11.Kxf7 f4 12.Kg6 d6 13.Ng5 dxc5 14.Ng4#


+M10	4. ... d3 5.c3 Qe8 6.Nf2 e1N 7.Kxg7 f3 8.Ngh3 d4 9.c4 d5 10.c5 Qxf7+ 11.Kxf7 f4 12.Kg6 d6 13.Ng5 dxc5 14.Ng4#
+M10	4. ... Qe8 5.Nf2 d3 6.c3 e1N 7.Kxg7 f3 8.Ngh3 d4 9.c4 d5 10.c5 Qxf7+ 11.Kxf7 f4 12.Kg6 d6 13.Ng5 dxc5 14.Ng4#
+M09	4. ... Qxf7+ 5.Nxf7+ Ke4 6.Ng5+ Ke5 7.Nf2 d3 8.c3 d4 9.c4 e1N 10.Bf8 f3 11.Nfh3 d5 12.c5 d6 13.Bxd6#
+M07	4. ... Qh7+ 5.Kxh7 d3 6.c3 d4 7.c4 f3 8.Kg6 Kf4 9.Bxd6+ Kg4 10.Nf2+ Kh4 11.Nxf3#
+M02	4. ... Qf8 5.Bxf8 exd1Q 6.Rxf5#
+M01	4. ... f3 5.Rxf5#
+M01	4. ... exd1Q 5.Rxf5#

+M9	5. ... Qe8 6.Nf2 e1N 7.Kxg7 f3 8.Ngh3 d4 9.c4 d5 10.c5 Qxf7+ 11.Kxf7 f4 12.Kg6 d6 13.Ng5 dxc5 14.Ng4#
+M8	5. ... Qxf7+ 6.Nxf7+ Ke4 7.Ng5+ Ke5 8.Nf2 d4 9.c4 e1N 10.Bf8 f3 11.Nfh3 d5 12.c5 d6 13.Bxd6#
+M6	5. ... Qh7+ 6.Kxh7 d4 7.c4 f3 8.Kg6 Kf4 9.Bxd6+ Kg4 10.Nf2+ Kh4 11.Nxf3#
+M2	5. ... Qf8 6.Bxf8 exd1Q 7.Rxf5#
+M1	5. ... d2 6.Rxf5#
+M1	5. ... f3 6.Rxf5#
+M1	5. ... d4 6.Rxf5#

------------- 4. .. Qe8 5. Nf2:

+M9	5. ... d3 6.c3 e1N 7.Kxg7 f3 8.Ngh3 d4 9.c4 d5 10.c5 Qxf7+ 11.Kxf7 f4 12.Kg6 d6 13.Ng5 dxc5 14.Ng4#
+M7	5. ... e1N 6.Kxg7 f3 7.Ngh3 Qh8+ 8.Kxh8 Ke6 9.Ng5+ Ke5 10.Nfh3 f4 11.Rxf4 Nxc2 12.Bf6#
+M4	5. ... Qxf7+ 6.Nxf7+ Ke6 7.Bf8 e1Q 8.Ng5+ Ke5 9.Bxg7#
+M1	5. ... f3 6.Nd3#
+M1	5. ... e1Q 6.Nd3#
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