MESON Chess Problem Database

Problem Display
PID: 172290 (6kb/4Q1p1/8/6KP/6N1/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

6kb/4Q1p1/8/6KP/6N1/8/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kh7
      • 2.Sf6#
    • 1...g6
      • 2.Sh6#
  • Tries
    • 1.Se5?
      • 1...g6
        • 2.Qf7#
      • 1...Kh7!
    • 1.Qf7+?
      • 1...Kh7
        • 2.Sf6#
      • 1...Kxf7!
  • Keys
    • 1.h6!
      • 1...gxh6+
        • 2.Sxh6#
      • 1...Kh7
        • 2.Sf6#
      • 1...g6
        • 2.h7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINP(a),S_FLIGHT::S(A)
    • P(a);N_GUARD::S(A)
  • Tries
    • Try
      • S(A);
      • Vars
        • P(a);::QAB1(D)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::S(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(D)
  • Actual
    • P(C);
    • Vars
      • P(a);CHECK,XP(C)::S(A),XP(a)
      • K(b);P_SPINP(a),S_FLIGHT::S(A)
      • P(a);::P(C)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).