MESON Chess Problem Database

Problem Display
PID: 266480 (1Kn1BN2/6p1/1p5k/1Q4p1/3Bp3/8/8/1b1q4 w - - 0 1)

Kapustin, Fedor Mikhailovich

Mat, 1980

1Kn1BN2/6p1/1p5k/1Q4p1/3Bp3/8/8/1b1q4

#2

5 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qh5#
  • Tries
    • 1.Qc6+?
      • 1...g6
        • 2.Qxg6#
      • 1...Sd6!
    • 1.Qd7?
      • threat
        • 2.Bxg7#
        • 2.Qxg7#
      • 1...Qxd4
        • 2.Qh3#
      • 1...g4
        • 2.Qxg7#
      • 1...g6
        • 2.Qh7#
      • 1...Se7!
    • 1.Qf5?
      • threat
        • 2.Qg6#
        • 2.Qh7#
      • 1...g6
        • 2.Qxg6#
      • 1...Qh5
        • 2.Qh7#
      • 1...Se7
        • 2.Qh7#
      • 1...g4
        • 2.Qg6#
        • 2.Qh5#
      • 1...e3!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxg7#
      • 1...Qxd4
        • 2.Qh2#
      • 1...g6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATE::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAR1(B),XP(g)
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_GUARD,XB(A)::QAR(B)
        • P(d);::QAB1(B),XP(g)
        • P(g);OGATE::QAR1(B)
      • Refutation
        • S(h);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);::QAR1(B),XP(g)
        • Q(b);::QAR1(B)
        • S(h);::QAR1(B)
      • Refutation
        • P(c);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(g)
    • Vars
      • Q(b);N_GUARD,XB(A)::QAR(B)
      • P(g);OGATE::QAR2(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).