Complex Puzzle

[peter]

Hi Jon!
Where have you got it from

[peter]

Hi Jon!
Where have you got it from

Already found it in YACPDB. It's a study from Gregory Slepian 2008,

[Nordlandia]

Hi Jon!
Where have you got it from

EG [Magazine] January 2010 Supplement, page 67

[Nordlandia]

Another falsely claimed draw

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "kb6/B6b/1r6/1P5R/8/3R4/n7/6K1 b - - 0 0"]
[PlyCount "167"]

1... Rg6+ 2. Kh1 Rg7 3. Bxb8 Bxd3 4. Rh8 Rd7 5. Bf4+ Ka7 6. Rh6 Bxb5 7. Rd6
Rh7+ 8. Rh6 Re7 9. Bd2 Rd7 10. Rh2 Kb7 11. Rf2 Bc4 12. Kg1 Kb6 13. Kg2 Rd3 14.
Re2 Kc6 15. Rf2 Kc5 16. Kg1 Rb3 17. Rf4 Rb2 18. Rf2 Rb1+ 19. Kg2 Kd4 20. Kf3
Rd1 21. Ba5 Rh1 22. Bd2 Kd3 23. Kf4 Rd1 24. Ba5 Nc1 25. Bb6 Ne2+ 26. Ke5 Rb1
27. Bc5 Ba2 28. Rf8 Rb5 29. Kd6 Bb1 30. Rd8 Bc2 31. Ke7+ Kc4 32. Bf2 Re5+ 33.
Kd6 Rf5 34. Ba7 Nc3 35. Ke6 Rh5 36. Rc8+ Kd3 37. Rd8+ Ke4 38. Rd4+ Kf3 39. Rd8
Bf5+ 40. Kf6 Bb1 41. Rf8 Bd3 42. Kg7+ Kg4 43. Bb8 Nd5 44. Rh8 Rf5 45. Rh1 Nf6
46. Rg1+ Kh5 47. Re1 Rf3 48. Bd6 Ne4 49. Be7 Kg4 50. Ra1 Kf5 51. Kf7 Nc3 52.
Rh1 Nd5 53. Bd6 Ke4+ 54. Kg7 Ne3 55. Bb8 Nf5+ 56. Kg6 Nd4 57. Rd1 Ne6 58. Re1+
Kd5+ 59. Kh5 Bf5 60. Rd1+ Kc6 61. Rh1 Rb3 62. Be5 Rb7 63. Bf4 Rg7 64. Bh6 Rg2
65. Kh4 Nd4 66. Rf1 Be6 67. Rf4 Nf5+ 68. Kh3 Rg6 69. Bf8 Ne3+ 70. Kh2 Rg2+ 71.
Kh1 Bd5 72. Bh6 Ng4 73. Rc4+ Kd6 74. Bf8+ Ke5 75. Rxg4 Rxg4+ 76. Kh2 Be4 77.
Be7 Bf5 78. Bh4 Rxh4+ 79. Kg2 Rh3 80. Kf2 Bg4 81. Kg2 Kf4 82. Kf2 Bf3 83. Kf1
Ke3 84. Ke1 Rh1# *

[/pgn]

Code: Select all

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "kb6/B6b/1r6/1P5R/8/3R4/n7/6K1 b - - 0 0"]
[PlyCount "167"]

1... Rg6+ 2. Kh1 Rg7 3. Bxb8 Bxd3 4. Rh8 Rd7 5. Bf4+ Ka7 6. Rh6 Bxb5 7. Rd6
Rh7+ 8. Rh6 Re7 9. Bd2 Rd7 10. Rh2 Kb7 11. Rf2 Bc4 12. Kg1 Kb6 13. Kg2 Rd3 14.
Re2 Kc6 15. Rf2 Kc5 16. Kg1 Rb3 17. Rf4 Rb2 18. Rf2 Rb1+ 19. Kg2 Kd4 20. Kf3
Rd1 21. Ba5 Rh1 22. Bd2 Kd3 23. Kf4 Rd1 24. Ba5 Nc1 25. Bb6 Ne2+ 26. Ke5 Rb1
27. Bc5 Ba2 28. Rf8 Rb5 29. Kd6 Bb1 30. Rd8 Bc2 31. Ke7+ Kc4 32. Bf2 Re5+ 33.
Kd6 Rf5 34. Ba7 Nc3 35. Ke6 Rh5 36. Rc8+ Kd3 37. Rd8+ Ke4 38. Rd4+ Kf3 39. Rd8
Bf5+ 40. Kf6 Bb1 41. Rf8 Bd3 42. Kg7+ Kg4 43. Bb8 Nd5 44. Rh8 Rf5 45. Rh1 Nf6
46. Rg1+ Kh5 47. Re1 Rf3 48. Bd6 Ne4 49. Be7 Kg4 50. Ra1 Kf5 51. Kf7 Nc3 52.
Rh1 Nd5 53. Bd6 Ke4+ 54. Kg7 Ne3 55. Bb8 Nf5+ 56. Kg6 Nd4 57. Rd1 Ne6 58. Re1+
Kd5+ 59. Kh5 Bf5 60. Rd1+ Kc6 61. Rh1 Rb3 62. Be5 Rb7 63. Bf4 Rg7 64. Bh6 Rg2
65. Kh4 Nd4 66. Rf1 Be6 67. Rf4 Nf5+ 68. Kh3 Rg6 69. Bf8 Ne3+ 70. Kh2 Rg2+ 71.
Kh1 Bd5 72. Bh6 Ng4 73. Rc4+ Kd6 74. Bf8+ Ke5 75. Rxg4 Rxg4+ 76. Kh2 Be4 77.
Be7 Bf5 78. Bh4 Rxh4+ 79. Kg2 Rh3 80. Kf2 Bg4 81. Kg2 Kf4 82. Kf2 Bf3 83. Kf1
Ke3 84. Ke1 Rh1# *

[Nordlandia]

Possible 8-Man Cook

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1R2K1nr/7p/8/8/6B1/k6n/8/8 w - - 0 0"]
[PlyCount "22"]

{[#]} 1. Ra8+ (1. Ra8+ Kb4 2. Rb8+ {-2.19/44 Stockfish 251216 64 POPCNT}) 1...
Kb4 2. Rb8+ Ka5 3. Ra8+ Kb6 4. Rb8+ Ka7 5. Rb4 Nh6+ (5... Nf6+) 6. Ke7 (6. Ke7
Ng5 7. Kf6 {-0.70/34 Komodo 10.3 64-bit}) 6... Ng5 7. Bd7 (7. Kf6 Rg8 8. Bh5 {
-1.14/32 Stockfish 251216 64 POPCNT}) 7... Nhf7 8. Be6 Ne5 9. Kf6 h6 10. Ba2 (
10. Kxe5) 10... Nd7+ 11. Kg6 Ka6 *

[/pgn]

[Nordlandia]

This one is hard

[d]8/1R4pk/4b2p/q3p3/3B1pp1/p6p/5R2/1K1Q3n w - - 0 0

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/1R4pk/4b2p/q3p3/3B1pp1/p6p/5R2/1K1Q3n w - - 0 0"]
[PlyCount "31"]

1. Qd3+ Kg8 2. Rb8+ Kf7 3. Rxf4+ exf4 4. Rb7+ Kg8 5. Ka1 Ng3 6. Qh7+ Kxh7 7.
Rxg7+ Kh8 8. Rxg4+ Kh7 9. Rg7+ Kh8 10. Rxg3+ Kh7 11. Rg7+ Kh8 12. Ra7+ Kg8 13.
Rxa5 Kh7 14. Re5 Bf7 15. Bg1 Kg6 16. Ra5 *

[/pgn]

Code: Select all

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/1R4pk/4b2p/q3p3/3B1pp1/p6p/5R2/1K1Q3n w - - 0 0"]
[PlyCount "31"]

1. Qd3+ Kg8 2. Rb8+ Kf7 3. Rxf4+ exf4 4. Rb7+ Kg8 5. Ka1 Ng3 6. Qh7+ Kxh7 7.
Rxg7+ Kh8 8. Rxg4+ Kh7 9. Rg7+ Kh8 10. Rxg3+ Kh7 11. Rg7+ Kh8 12. Ra7+ Kg8 13.
Rxa5 Kh7 14. Re5 Bf7 15. Bg1 Kg6 16. Ra5 *

Cook

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "br6/N2n3K/8/RP3n2/8/3P2bp/2B3kP/R7 w - - 0 1"]
[PlyCount "94"]

{[#]} 1. Nc6 Nf8+ (1... Nf8+ 2. Kg8 Bxc6 {-1.27/30 Stockfish 251216 64 POPCNT})
2. Kg8 Bxc6 3. bxc6 Be5 4. Rxe5 Nd7+ 5. Kh7 Nxe5 6. d4 (6. d4 Nxd4 7. Be4+ {
-1.28/32 Stockfish 8 64}) 6... Nxd4 7. Be4+ Kxh2 (7... Kf2) 8. Rh1+ (8. Rh1+
Kg3 9. Rxh3+ {-0.91/35 Komodo 10.3 64-bit}) 8... Kg3 9. Rxh3+ Kf4 (9... Kf4 10.
Rh4+ Ng4 {-1.12/34 Stockfish 7 64}) 10. Rh4+ Ng4 11. Bg6 Nf3 12. Rh1 Rc8 13.
Kg7 Nd4 14. Re1 Ne3 15. c7 (15. Bb1 Rxc6) 15... Rxc7+ 16. Kf8 Nf3 17. Rh1 Ne5
18. Bb1 Rb7 19. Re1 N3g4 20. Bc2 Kg3 21. Rd1 Ne3 22. Rg1+ Kf2 23. Rh1 N3g4 24.
Kg8 Nf6+ 25. Kh8 Rc7 26. Bb1 Kg3 27. Rf1 Neg4 28. Bd3 Kh4 29. Bb1 Kg5 30. Rg1
Rd7 31. Bc2 Rd2 32. Bb1 Kh6 33. Rh1+ Nh2 34. Bd3 Ra2 35. Ba6 Rc2 36. Bc4 Rxc4
37. Rc1 Rh4 38. Rg1 Nh7 39. Re1 Rf4 40. Re6+ Nf6 41. Re3 Nhg4 42. Rc3 Ne5 43.
Rh3+ Kg6 44. Rg3+ Kf7 45. Rg4 Ng6+ 46. Rxg6 Rh4+ 47. Rh6 Rxh6# {Lomonosov
Tablebases} *

[/pgn]

Code: Select all

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "br6/N2n3K/8/RP3n2/8/3P2bp/2B3kP/R7 w - - 0 1"]
[PlyCount "94"]

{[#]} 1. Nc6 Nf8+ (1... Nf8+ 2. Kg8 Bxc6 {-1.27/30 Stockfish 251216 64 POPCNT})
2. Kg8 Bxc6 3. bxc6 Be5 4. Rxe5 Nd7+ 5. Kh7 Nxe5 6. d4 (6. d4 Nxd4 7. Be4+ {
-1.28/32 Stockfish 8 64}) 6... Nxd4 7. Be4+ Kxh2 (7... Kf2) 8. Rh1+ (8. Rh1+
Kg3 9. Rxh3+ {-0.91/35 Komodo 10.3 64-bit}) 8... Kg3 9. Rxh3+ Kf4 (9... Kf4 10.
Rh4+ Ng4 {-1.12/34 Stockfish 7 64}) 10. Rh4+ Ng4 11. Bg6 Nf3 12. Rh1 Rc8 13.
Kg7 Nd4 14. Re1 Ne3 15. c7 (15. Bb1 Rxc6) 15... Rxc7+ 16. Kf8 Nf3 17. Rh1 Ne5
18. Bb1 Rb7 19. Re1 N3g4 20. Bc2 Kg3 21. Rd1 Ne3 22. Rg1+ Kf2 23. Rh1 N3g4 24.
Kg8 Nf6+ 25. Kh8 Rc7 26. Bb1 Kg3 27. Rf1 Neg4 28. Bd3 Kh4 29. Bb1 Kg5 30. Rg1
Rd7 31. Bc2 Rd2 32. Bb1 Kh6 33. Rh1+ Nh2 34. Bd3 Ra2 35. Ba6 Rc2 36. Bc4 Rxc4
37. Rc1 Rh4 38. Rg1 Nh7 39. Re1 Rf4 40. Re6+ Nf6 41. Re3 Nhg4 42. Rc3 Ne5 43.
Rh3+ Kg6 44. Rg3+ Kf7 45. Rg4 Ng6+ 46. Rxg6 Rh4+ 47. Rh6 Rxh6# {Lomonosov
Tablebases} *

[Nordlandia]

White wins!

[d]k1K5/8/8/1N1R4/5rpp/6pb/6p1/6N1 w - - 0 0

[Nordlandia]

Author claims wins, however Stockfish can't find any winning lines.

[d]8/1R6/6P1/1nK4k/1n5P/8/r5B1/8 w - - 0 0

[peter]

Author claims wins, however Stockfish can't find any winning lines.

[d]8/1R6/6P1/1nK4k/1n5P/8/r5B1/8 w - - 0 0

Who's the author and how's his study- line

[Nordlandia]

From EG january 2017 supplement.