MESON Chess Problem Database

Problem Display
PID: 51134 (6B1/8/2p4B/Q7/4k3/5N2/8/7K w - - 0 1)

Allison, Christopher John

Manchester Guardian, 1950

6B1/8/2p4B/Q7/4k3/5N2/8/7K

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qd2?
      • 1...Kxf3
        • 2.Qg2#
      • 1...c5
        • 2.Qd5#
      • 1...Kf5!
    • 1.Qc5?
      • 1...Kd3
        • 2.Qc4#
      • 1...Kxf3!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Se1#
      • 1...Kxf3!
    • 1.Qg5?
      • 1...Kxf3
        • 2.Qg2#
      • 1...c5
        • 2.Qd5#
      • 1...Kd3!
  • Keys
    • 1.Qa2!
      • 1...Kd3
        • 2.Qc4#
      • 1...Kxf3
        • 2.Qg2#
      • 1...Kf5
        • 2.Qe6#
      • 1...c5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(C)
        • P(b);N_GUARD::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::S(B)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(C)
        • P(b);N_GUARD::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(C)
      • P(b);N_GUARD::QAB1(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).