MESON Chess Problem Database

Problem Display
PID: 21152 (6Q1/3p4/2N1R3/1b6/4Pp2/4k3/2P3P1/4K3 w - - 0 1)

Keeble, John Frederick

Good Companions (February Meredith Ty.), 1917

6Q1/3p4/2N1R3/1b6/4Pp2/4k3/2P3P1/4K3

#2

7 + 4

3571 An English Bohemian 1933

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qg5#
    • 1...d5
      • 2.exd5#
  • Tries
    • 1.Qg3+?
      • 1...f3
        • 2.Qxf3#
        • 2.Qg5#
      • 1...fxg3!
    • 1.Qg7?
      • threat
        • 2.Qd4#
      • 1...Bxc6
        • 2.Qc3#
      • 1...f3
        • 2.Qh6#
        • 2.Qg5#
      • 1...dxc6!
    • 1.Qh8?
      • threat
        • 2.Qd4#
      • 1...Bxc6
        • 2.Qc3#
      • 1...f3
        • 2.Qh6#
      • 1...dxc6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qb6#
      • 1...dxc6
        • 2.Qd2#
      • 1...dxe6
        • 2.Qd4#
      • 1...f3
        • 2.Qg5#
      • 1...d5
        • 2.exd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAB(G)
    • P(d);OGATE::R(F)+P(D),XP(d)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • P(b);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • B(c);N_GUARD,XS(E)::QAR2(G)
      • Refutation
        • P(d);XS(E)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • B(c);N_GUARD,XS(E)::QAR2(G)
        • P(b);OGATEB::QAB(G)
      • Refutation
        • P(d);XS(E)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • P(d);OGATE,XS(E)::QAB1(G)
      • P(d);OGATE,XR(F)::QAB1(G)
      • P(b);OGATEB::QAB(G)
      • P(d);OGATE::R(F)+P(D),XP(d)
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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).