MESON Chess Problem Database

Problem Display
PID: 81449 (8/8/4p3/2P1R1P1/5k2/3K4/6Q1/8 w - - 0 1)

Akerblom, Johan Axel

Sodra Delarnes Tidning, 1929

8/8/4p3/2P1R1P1/5k2/3K4/6Q1/8

#2

5 + 2

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qe4#
  • Tries
    • 1.Re1?
      • 1...e5
        • 2.Rf1#
      • 1...Kf5!
    • 1.Re2?
      • 1...e5
        • 2.Rf2#
      • 1...Kf5!
    • 1.Re3?
      • 1...e5
        • 2.Rf3#
      • 1...Kf5!
    • 1.Qf3+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kxf3!
    • 1.Qg4+?
      • 1...Kxe5
        • 2.Qe4#
      • 1...Kxg4!
  • Keys
    • 1.g6!
      • 1...Kxe5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XR(D)::QAR1(A)
  • Tries
    • Try
      • R(D);
      • Vars
        • P(b);SBLOCK::R(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);
      • Vars
        • P(b);SBLOCK::R(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);
      • Vars
        • P(b);SBLOCK::R1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(D)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(D)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • P(E);
    • Vars
      • K(a);S_FLIGHT,XR(D)::QAR2(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).