MESON Chess Problem Database

Problem Display
PID: 198655 (5K2/7k/5Q1P/5n2/8/8/8/8 w - - 0 1)

Elekes, Dezso

Chess Amateur (The), 1921

5K2/7k/5Q1P/5n2/8/8/8/8

#2

3 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qg7#
    • 1...Sg3
      • 2.Qg7#
    • 1...Sd4
      • 2.Qg7#
    • 1...Sh4
      • 2.Qg7#
    • 1...Sd6
      • 2.Qg7#
    • 1...Sxh6
      • 2.Qg7#
    • 1...Se7
      • 2.Qg7#
    • 1...Sg7
      • 2.Qxg7#
  • Tries
    • 1.Qg6+?
      • 1...Kh8
        • 2.Qg8#
      • 1...Kxg6!
    • 1.Qf7+?
      • 1...Kh8
        • 2.Qg8#
      • 1...Sg7
        • 2.Qxg7#
      • 1...Kxh6!
  • Keys
    • 1.Qg5!
      • 1...Kh8
        • 2.Qg8#
      • 1...Sxh6
        • 2.Qg7#
      • 1...Se3
        • 2.Qg7#
      • 1...Sg3
        • 2.Qg7#
      • 1...Sd4
        • 2.Qg7#
      • 1...Sh4
        • 2.Qg7#
      • 1...Sd6
        • 2.Qg7#
      • 1...Se7
        • 2.Qg7#
      • 1...Sg7
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD,XP(B)::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XP(B)
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • S(a);N_GUARD,XP(B)::QAR1(A)
      • S(a);N_GUARD::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(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).