MESON Chess Problem Database

Problem Display
PID: 257971 (3B1N1n/5P1Q/5P2/5K1n/7k/7p/3p1P2/8 w - - 0 1)

Hadzi-Vaskov, Georgi

Astafyeva-30 JT (Kudesnik), 2021

3B1N1n/5P1Q/5P2/5K1n/7k/7p/3p1P2/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Sxg6#
    • 1...Sxf7
      • 2.Sg6#
  • Tries
    • 1.Qh6?
      • threat
        • 2.Qg5#
      • 1...Sxf7
        • 2.Sg6#
      • 1...h2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qg4#
        • 2.Qg5#
      • 1...Sg3+
        • 2.fxg3#
      • 1...Sg7+
        • 2.fxg7#
      • 1...Sxg6
        • 2.Sxg6#
      • 1...Sxf7
        • 2.Qg4#
      • 1...h2
        • 2.Qg4#
      • 1...d1Q
        • 2.Qg5#
      • 1...d1B
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::S(G),XS(e)
    • S(e);N_GUARD,XP(D)::S(G)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • S(e);N_GUARD,XP(D)::S(G)
      • Refutation
        • P(b);
  • Actual
    • Q(E);N_PINS(d)
    • Threat
      • DUALS(2)
    • Vars
      • S(d);CHECK,OGATE::P(A),XS(d)
      • S(d);CHECK,OGATE::B(F)+P(C),XS(d)
      • S(e);XQ(E)::S(G),XS(e)
      • S(e);XP(D)::QAR1(E)
      • P(b);::QAR1(E)
      • P(a);::QAB1(E)
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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).