MESON Chess Problem Database

Problem Display
PID: 161526 (5n1k/5Kpp/6P1/8/8/8/8/7Q w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

5n1k/5Kpp/6P1/8/8/8/8/7Q

#2

3 + 4

15148 Sadier Collection 2017
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Qxh7#
    • 1...Sd7
      • 2.Qxh7#
  • Tries
    • 1.Kxf8?
      • threat
        • 2.Qxh7#
      • 1...h5
        • 2.Qxh5#
      • 1...h6!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qxg7#
      • 1...gxh6
        • 2.g7#
      • 1...Se6
        • 2.Qxh7#

This anticipates 250826(2010)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::QAR1(A),XP(b)
  • Tries
    • Try
      • K(C);P-FLIGHT,XS(c)
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • P(b);OGATEB::QAR(A),XP(b)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(a)
    • Vars
      • P(a);N_SPINP(b),OGATE,XQ(A)::P(B)
      • S(c);N_GUARD::QAR1(A),XP(b)
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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).