MESON Chess Problem Database

Problem Display
PID: 172543 (5K2/4N2p/8/6pk/4Q2P/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2003

5K2/4N2p/8/6pk/4Q2P/8/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qxh7#
  • Tries
    • 1.Kg7?
      • 1...gxh4
        • 2.Qf5#
      • 1...g4
        • 2.Qxh7#
      • 1...h6!
    • 1.Qg4+?
      • 1...Kh6
        • 2.Qxg5#
        • 2.hxg5#
      • 1...Kxg4!
  • Keys
    • 1.Sg8!
      • 1...gxh4
        • 2.Qf5#
      • 1...g4
        • 2.Qxh7#
      • 1...h6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK::QAR2(A),XP(c)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • P(a);OGATEB,SBLOCK,XP(B)::QAR2(A)
        • P(a);SBLOCK::QAR2(A),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • S(C);
    • Vars
      • P(a);OGATEB,SBLOCK,XP(B)::QAR2(A)
      • P(a);SBLOCK::QAR2(A),XP(c)
      • P(c);SBLOCK::S(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).