MESON Chess Problem Database

Problem Display
PID: 177530 (7B/6P1/8/8/2K5/8/kp6/3B3R w - - 0 1)

Cheylan, Yves

Postsjakk, 1974

7B/6P1/8/8/2K5/8/kp6/3B3R

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kb1
      • 2.Bb3#
  • Tries
    • 1.g8R?
      • 1...Ka1
        • 2.Bb3#
      • 1...Kb1
        • 2.Bb3#
      • 1...Ka3
        • 2.Ra8#
      • 1...b1Q
        • 2.Ra8#
      • 1...b1B
        • 2.Ra8#
      • 1...b1R
        • 2.Ra8#
      • 1...b1S!
  • Keys
    • 1.g8Q!
      • 1...Ka1
        • 2.Bb3#
      • 1...Kb1
        • 2.Bb3#
      • 1...Ka3
        • 2.Qa8#
      • 1...b1Q
        • 2.Qa8#
      • 1...b1S
        • 2.Kb4#
      • 1...b1B
        • 2.Kb4#
        • 2.Qa8#
      • 1...b1R
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::R(B)+B(A)
  • Tries
    • Try
      • P(D);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::R(B)+B(A)
        • K(a);S_FLIGHT::R(B)+B(A)
        • K(a);P-FLIGHT::R(D)
        • P(b);SBLOCK::R(D)
      • Refutation
        • P(b);
  • Actual
    • P(D);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::R(B)+B(A)
      • K(a);S_FLIGHT::R(B)+B(A)
      • K(a);P-FLIGHT::QAR(D)
      • P(b);SBLOCK::QAR(D)
      • P(b);SBLOCK::QAB(D)+K(C)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).