MESON Chess Problem Database

Problem Display
PID: 61773 (8/8/8/7Q/5Np1/5kN1/4R3/3K4 w - - 0 1)

Gunn, Robert Ivan

Chess, 1943

8/8/8/7Q/5Np1/5kN1/4R3/3K4

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Rf2+?
      • 1...Ke3
        • 2.Qc5#
      • 1...Kxg3
        • 2.Qh2#
      • 1...Kxf2!
    • 1.Qe8?
      • threat
        • 2.Qe3#
      • 1...Kxf4
        • 2.Qe3#
      • 1...Kxg3!
    • 1.Qh1+?
      • 1...Kxg3
        • 2.Sh5#
      • 1...Kxf4!
    • 1.Qd5+?
      • 1...Kxf4
        • 2.Sh5#
      • 1...Kxg3!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qf2#
        • 2.Qe3#
      • 1...Kxg3
        • 2.Qf2#
      • 1...Kxf4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB(E)
        • K(a);N_SPINP(b),P-FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XR(B)
    • Try
      • Q(E);N_PINP(b)
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XS(C)::S(D)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XS(D)::S(C)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • Q(E);N_PINP(b)
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAB1(E)
      • K(a);P-FLIGHT,XS(D)::QAB1(E)
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).