No.1621
James Malcom
(USA)


Warm welcome to James!

Original Fairy problems
JF-2021-I:
01.01.2021 - 30.06.2021


No. 1621 James Malcom
USA
original - 12.06.2021

black Bh1f8 Pg2a4h6f6g7e7c7a7 Kh8 white Kg1 Ph2f2a2g5e6c6 Bf7
s=74                       8+11

Solution: (click to show/hide)


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jamesmalcom
jamesmalcom
June 12, 2021 23:31

Of course, within the transposition, we have the natural triangulation dual of Ba6 and Bb7.

shankar ram
shankar ram
June 13, 2021 00:50
Reply to  jamesmalcom

James is already a veteran in the matplus forum, PDB and Andrew’s Zoom calls! Welcome to him on his first appearance in JF!

Joost
Joost
June 13, 2021 13:52

Is Bh1 really necessary?

jamesmalcom
jamesmalcom
June 19, 2021 23:56
Reply to  Joost

It’s sole purpose is to ensure that the White king cannot move to create shorter solutions. For a C- problem it is an important safeguard as useless as it probably is.

Joost
Joost
June 13, 2021 23:04

George Sphicas published a s=154 in Strategems in 2003. It’s not marked as C- in Winchloe.

Joost
Joost
June 13, 2021 23:15
Reply to  Joost

[Round “-“]
[White “-“]
[Black “-“]
[Result “1/2-1/2”]
[FEN “8/p1pr4/1p6/2p1p1R1/nqp4k/2b2Q2/r1p1bP1K/2n5 w – – 0 1”]
[SetUp “1”]

{————–
. . . . . . . .
p . p r . . . .
. p . . . . . .
. . p . p . R .
n q p . . . . k
. . b . . Q . .
r . p . b P . K
. . n . . . . .
white to play
————–}
1. Rg4+ Kh5 2. Qf5+ Kh6 3. Qg5+ Kh7 4. Qg8+ Kh6 5. Qh8+ Rh7 6. Qf6+ Kh5 7.
Qf5+ Kh6 8. Rh4+ Kg7 9. Rxh7+ Kg8 10. Qg6+ Kf8 11. Qg7+ Ke8 12. Qf7+ Kd8
13. Qxc7+ Ke8 14. Qf7+ Kd8 15. Qe7+ Kc8 16. Qd7+ Kb8 17. Qxa7+ Kc8 18. Qd7+
Kb8 19. Qc7+ Ka8 20. Qc6+ Kb8 21. Rb7+ Ka8 22. Rxb6+ Ka7 23. Ra6+ Kb8 24.
Qa8+ Kc7 25. Rc6+ Kd7 26. Qc8+ Ke7 27. Re6+ Kf7 28. Qe8+ Kg7 29. Rg6+ Kh7
30. Qf7+ Kh8 31. Qf6+ Kh7 32. Rg7+ Kh8 33. Rg3+ Kh7 34. Qg6+ Kh8 35. Rh3+
Bh5 36. Qf6+ Kg8 37. Rg3+ Kh7 38. Rg7+ Kh8 39. Rg5+ Kh7 40. Rxh5+ Kg8 41.
Qg6+ Kf8 42. Rh8+ Ke7 43. Re8+ Kd7 44. Qe6+ Kc7 45. Re7+ Kb8 46. Qd6+ Ka8
47. Qa6+ Kb8 48. Qa7+ Kc8 49. Qd7+ Kb8 50. Qc7+ Ka8 51. Qc8+ Qb8 52. Qa6+
Qa7 53. Rxa7+ Kb8 54. Rb7+ Kc8 55. Qc6+ Kd8 56. Rd7+ Ke8 57. Qe6+ Kf8 58.
Rf7+ Kg8 59. Qg6+ Kh8 60. Qh6+ Kg8 61. Rg7+ Kf8 62. Qf6+ Ke8 63. Re7+ Kd8
64. Qd6+ Kc8 65. Rc7+ Kb8 66. Rxc5+ Ka8 67. Rc8+ Ka7 68. Rc7+ Ka8 69. Qa6+
Kb8 70. Rb7+ Kc8 71. Qc6+ Kd8 72. Rd7+ Ke8 73. Qe6+ Kf8 74. Rf7+ Kg8 75.
Qg6+ Kh8 76. Qh6+ Kg8 77. Rg7+ Kf8 78. Qf6+ Ke8 79. Re7+ Kd8 80. Qd6+ Kc8
81. Rc7+ Kb8 82. Rxc4+ Ka8 83. Rc8+ Ka7 84. Rc7+ Ka8 85. Qa6+ Kb8 86. Rb7+
Kc8 87. Qc6+ Kd8 88. Rd7+ Ke8 89. Qe6+ Kf8 90. Rf7+ Kg8 91. Qg6+ Kh8 92.
Qh6+ Kg8 93. Rg7+ Kf8 94. Qf6+ Ke8 95. Re7+ Kd8 96. Qd6+ Kc8 97. Rc7+ Kb8
98. Rxc3+ Ka8 99. Rc8+ Ka7 100. Rc7+ Ka8 101. Qa6+ Kb8 102. Rb7+ Kc8 103.
Qc6+ Kd8 104. Rd7+ Ke8 105. Qe6+ Kf8 106. Rf7+ Kg8 107. Qg6+ Kh8 108. Qh6+
Kg8 109. Rg7+ Kf8 110. Qf6+ Ke8 111. Re7+ Kd8 112. Qd6+ Kc8 113. Rc7+ Kb8
114. Rxc2+ Ka8 115. Rc8+ Ka7 116. Rc7+ Ka8 117. Qa6+ Kb8 118. Rb7+ Kc8 119.
Qc6+ Kd8 120. Rd7+ Ke8 121. Qe6+ Kf8 122. Rf7+ Kg8 123. Qg6+ Kh8 124. Qh6+
Kg8 125. Rg7+ Kf8 126. Qf6+ Ke8 127. Re7+ Kd8 128. Qd6+ Kc8 129. Rc7+ Kb8
130. Rxc1+ Ka8 131. Rc8+ Ka7 132. Rc7+ Kb8 133. Rd7+ Ka8 134. Qa6+ Kb8 135.
Rb7+ Kc8 136. Rb2+ Kc7 137. Rxa2 Kb8 138. Rxa4 e4 139. Qb6+ Kc8 140. Ra8+
Kd7 141. Rd8+ Ke7 142. Qd6+ Kf7 143. Rf8+ Kg7 144. Qf6+ Kh7 145. Qh8+ Kg6
146. Rf6+ Kg5 147. Qh6+ Kg4 148. f3+ exf3 149. Qg6+ Kh4 150. Kh1 f2 151.
Rf4+ Kh3 152. Rf3+ Kh4 153. Rh3+ Kxh3 154. Qg3+ Kxg3
{Xboard adjudication: Stalemate} 1/2-1/2

jamesmalcom
jamesmalcom
June 14, 2021 17:43
Reply to  Joost

Thanks Joost. You have reminded me of a s=165 by Sphicas too that is in PDB: https://pdb.dieschwalbe.de/P1329015 However the solution is not given. I won’t be surprised if either of these productions are cooked.