MESON Chess Problem Database

Problem Display
PID: 89101 (8/8/8/8/8/5N2/Q3N1k1/4K2R w K - 0 1)

Rice, John Michael

The Problemist, 1991

8/8/8/8/8/5N2/Q3N1k1/4K2R

#2

5 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh1
      • 2.Sg3#
  • Tries
    • 1.Seg1+?
      • 1...Kxh1
        • 2.Qh2#
      • 1...Kg3!
    • 1.Sed4+?
      • 1...Kxh1
        • 2.Qh2#
      • 1...Kg3!
    • 1.Rg1+?
      • 1...Kh3
        • 2.Sf4#
        • 2.Rg3#
        • 2.Qe6#
      • 1...Kxf3!
    • 1.Qb1?
      • 1...Kxh1
        • 2.Kf2#
      • 1...Kxf3!
    • 1.Qg8+?
      • 1...Kxh1
        • 2.Qg1#
      • 1...Kxf3!
    • 1.Qa1?
      • 1...Kxh1
        • 2.Kf2#
      • 1...Kxf3!
    • 1.Qb2?
      • 1...Kxh1
        • 2.Sg3#
      • 1...Kxf3!
    • 1.Qc2?
      • 1...Kxh1
        • 2.Sg3#
      • 1...Kxf3!
    • 1.Qd2?
      • 1...Kxh1
        • 2.Sg3#
      • 1...Kxf3!
    • 1.Qa7?
      • 1...Kxh1
        • 2.Qg1#
      • 1...Kxf3!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qh3#
      • 1...Kxh1
        • 2.Qh3#
      • 1...Kxf3
        • 2.0-0#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XR(B)::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(B)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(B)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR(C)+K(A)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR(C)+K(A)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::S(D)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::S(D)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::S(D)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR2(C)
      • K(a);S_FLIGHT,XS(E)::0-0
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).