MESON Chess Problem Database

Problem Display
PID: 89914 (n1B1N3/K7/2N5/2k5/8/8/8/5Q2 w - - 0 1)

Lokker, Miklosh S

Die Schwalbe, 1969

n1B1N3/K7/2N5/2k5/8/8/8/5Q2

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qc4#
  • Tries
    • 1.Be6?
      • threat
        • 2.Qc4#
      • 1...Kxc6
        • 2.Qc4#
      • 1...Sb6!
    • 1.Qf5+?
      • 1...Kxc6
        • 2.Bb7#
        • 2.Bd7#
      • 1...Kc4!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Qc4#
        • 2.Qb5#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxc6
        • 2.Qb5#
      • 1...Sb6
        • 2.Qb5#
      • 1...Sc7
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(B)::QAR2(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);P-FLIGHT,XS(B)::QAB1(A)
      • S(b);::QAR1(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).