MESON Chess Problem Database

Problem Display
PID: 158475 (2b5/Np1p4/1P3p2/B1k2p2/5K2/1QP5/1P6/8 w - - 0 1)

Sumner, Christopher Richard Benson

Morning Post, 1925

2b5/Np1p4/1P3p2/B1k2p2/5K2/1QP5/1P6/8

#2

7 + 6

1577 Jaarboek 1933

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Bb4#
    • 1...d5
      • 2.Qb4#
    • 1...d6
      • 2.Qb5#
  • Tries
    • 1.Qa2?
      • 1...Kd6
        • 2.Bb4#
      • 1...d6
        • 2.b4#
      • 1...d5!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Sxc8#
        • 2.Bb4#
      • 1...Kxc4!
    • 1.Qg8?
      • 1...Kd6
        • 2.Bb4#
      • 1...d6
        • 2.b4#
      • 1...d5!
  • Keys
    • 1.Qf7!
      • 1...Kd6
        • 2.Bb4#
      • 1...d5
        • 2.Qc7#
      • 1...d6
        • 2.b4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(E)
    • P(e);SBLOCK::QAB1(B)
    • P(e);SBLOCK::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::B(E)
        • P(e);SBLOCK::P(A)
      • Refutation
        • P(e);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::B(E)
        • P(e);SBLOCK::P(A)
      • Refutation
        • P(e);
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::B(E)
      • P(e);OGATE,SBLOCK::QAR2(B)
      • P(e);SBLOCK::P(A)
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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).