MESON Chess Problem Database

Problem Display
PID: 205544 (8/6Q1/7N/7k/8/7p/7K/8 w - - 0 1)

Lazard, Frederic

La Strategie, 1925

8/6Q1/7N/7k/8/7p/7K/8

#2

3 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qg4#
  • Tries
    • 1.Kg1?
      • 1...Kh4
        • 2.Qg4#
      • 1...h2+!
    • 1.Kh1?
      • 1...Kh4
        • 2.Qg4#
      • 1...h2!
    • 1.Qg1?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kxh6!
    • 1.Qg6+?
      • 1...Kh4
        • 2.Sf5#
        • 2.Qg4#
      • 1...Kxg6!
    • 1.Qg8?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kxh6!
  • Keys
    • 1.Sf7!
      • 1...Kh4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Vars
      • K(b);P-FLIGHT::QAB1(C)
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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).