MESON Chess Problem Database

Problem Display
PID: 77808 (8/2p5/2K5/8/kbQ5/8/2P5/8 w - - 0 1)

Lunn, Peter

The Tablet, 1953

(First published on Sat Jan 24 1953)

8/2p5/2K5/8/kbQ5/8/2P5/8

#2

3 + 3

3713 Snap 2008
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Qb3#
    • 1...Ka5
      • 2.Qb5#
  • Tries
    • 1.Kxc7?
      • 1...Ka3
        • 2.Qb3#
      • 1...Ka5!
    • 1.c3?
      • threat
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
  • Keys
    • 1.Qd4!
      • 1...Ka3
        • 2.Qa1#
      • 1...Ka5
        • 2.Qa7#

Anticipated by 71344(1924)

This anticipates 65707(1999)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
    • Try
      • P(A);
      • Threat
        • QAR1(B),XB(b)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT::QAR2(B)
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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).