MESON Chess Problem Database

Problem Display
PID: 89103 (8/8/4Q3/8/5kPN/7P/8/4K2R w K - 0 1)

Rice, John Michael

The Problemist, 1991

8/8/4Q3/8/5kPN/7P/8/4K2R

#2

6 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rf1+?
      • 1...Kg5
        • 2.Qf6#
      • 1...Kg3!
    • 1.Qd5?
      • 1...Ke3
        • 2.Sg2#
      • 1...Kg3!
    • 1.Qf5+?
      • 1...Kg3
        • 2.Qf2#
      • 1...Ke3!
    • 1.Qe2?
      • 1...Kg3
        • 2.Qf2#
      • 1...Kg5!
    • 1.g5?
      • 1...Kg3
        • 2.Qg4#
      • 1...Kxg5!
    • 1.0-0+?
      • 1...Kg5
        • 2.Qf6#
      • 1...Kg3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe3#
      • 1...Kf3
        • 2.0-0#
      • 1...Kg5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • K(A);0-0,CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • QAB1(F)
    • Vars
      • K(a);P-FLIGHT::0-0
      • K(a);S_FLIGHT::QAB1(F)
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).