MESON Chess Problem Database

Problem Display
PID: 23364 (4B3/8/5P2/6k1/4K2p/4p3/2Q5/8 w - - 0 1)

Antonov, Yuri Mikhailovich

Cherkasskaya Pravda, 1987

4B3/8/5P2/6k1/4K2p/4p3/2Q5/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Qg2#
  • Tries
    • 1.Ke5?
      • threat
        • 2.Qg6#
      • 1...Kg4
        • 2.Qg2#
      • 1...Kh6
        • 2.Qg6#
      • 1...h3!
    • 1.Qf2?
      • threat
        • 2.Qf4#
      • 1...Kg4
        • 2.Qg2#
      • 1...Kh6
        • 2.Qxh4#
      • 1...exf2!
    • 1.Qg2+?
      • 1...Kh6
        • 2.Qg6#
        • 2.Qg7#
      • 1...Kxf6!
    • 1.Qc5+?
      • 1...Kxf6
        • 2.Qe5#
      • 1...Kh6
        • 2.Qh5#
      • 1...Kg4!
    • 1.Qc7?
      • threat
        • 2.Qf4#
        • 2.Qg7#
      • 1...Kxf6
        • 2.Qe5#
      • 1...Kh6
        • 2.Qg7#
      • 1...h3
        • 2.Qf4#
      • 1...Kg4!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qf4#
      • 1...Kg4
        • 2.Qg2#
      • 1...Kxf6
        • 2.Qe5#
      • 1...Kh6
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • K(c);S_FLIGHT::QAR2(A),XP(b)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT,XP(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(C)::QAB1(A)
        • K(c);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XP(C)::QAB1(A)
        • K(c);S_FLIGHT::QAB1(A)
        • P(b);::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • K(c);S_FLIGHT,XP(C)::QAB1(A)
      • K(c);P_SPINP(b),S_FLIGHT::QAR2(A),XP(b)
HTML5 logo

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).