MESON Chess Problem Database

Problem Display
PID: 81037 (8/4p3/1K6/2Nk4/8/N7/8/6Q1 w - - 0 1)

Akerblom, Johan Axel

Sodra Delarnes Tidning, 1928

8/4p3/1K6/2Nk4/8/N7/8/6Q1

#2

4 + 2

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd4#
    • 1...e5
      • 2.Qd1#
  • Tries
    • 1.Qe3?
      • 1...Kd6
        • 2.Qd4#
        • 2.Qe6#
      • 1...e5
        • 2.Qd2#
        • 2.Qd3#
      • 1...e6!
    • 1.Qa1?
      • 1...Kd6
        • 2.Qd4#
      • 1...e5
        • 2.Qd1#
      • 1...e6!
    • 1.Qg5+?
      • 1...Kd6
        • 2.Sc4#
        • 2.Sb5#
      • 1...e5
        • 2.Qd2#
        • 2.Qd8#
      • 1...Kd4!
    • 1.Qg7?
      • 1...Kd6
        • 2.Qd4#
      • 1...e5
        • 2.Qd7#
      • 1...e6!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
    • P(b);SBLOCK::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);OGATE,SBLOCK::QAR2(A)
      • Refutation
        • P(b);
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);N_GUARD,SBLOCK::QAB(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).