MESON Chess Problem Database

Problem Display
PID: 172409 (8/8/5Q2/8/4p2K/8/6pk/4N2n w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

8/8/5Q2/8/4p2K/8/6pk/4N2n

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Sf3#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qxg2#
      • 1...Kg1
        • 2.Qxg2#
      • 1...Sf2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxg2#
      • 1...Kg1
        • 2.Qxg2#
      • 1...exf3
        • 2.Sxf3#
      • 1...g1Q
        • 2.Qh3#
      • 1...g1S
        • 2.Qg2#
      • 1...g1B
        • 2.Qg2#
        • 2.Qh3#
      • 1...g1R
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • Q(C);P_PINP(b)
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAR1(C),XP(b)
      • Refutation
        • S(a);N_SPINP(b)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(b)
    • Vars
      • K(c);S_FLIGHT::QAR1(C),XP(b)
      • P(d);XQ(C)::S(A),XP(d)
      • P(b);SBLOCK::QAR1(C)
      • P(b);::QAR1(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).