MESON Chess Problem Database

Problem Display
PID: 52405 (5rB1/4pr1b/R7/3kn2R/p6n/1N1p4/3N1Q2/5K2 w - - 0 1)

Gamage, Frederick

3rd Prize, Keeble MT, 1940

5rB1/4pr1b/R7/3kn2R/p6n/1N1p4/3N1Q2/5K2

#2

7 + 9

5064 100 Years of the American Two-move Chess Problem 1962
5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qd4#
      • 2.Qc5#
    • 1...Sf3
      • 2.Qc5#
    • 1...Sf5
      • 2.Qc5#
    • 1...Sg6
      • 2.Qf3#
  • Tries
    • 1.Bxf7+?
      • 1...e6
        • 2.Bxe6#
        • 2.Qd4#
        • 2.Qc5#
      • 1...Rxf7!
    • 1.Rf5?
      • threat
        • 2.Qd4#
        • 2.Qc5#
      • 1...Sxf5
        • 2.Qc5#
      • 1...Rc8
        • 2.Qd4#
      • 1...Sf3
        • 2.Qc5#
        • 2.Qxf3#
      • 1...axb3!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Rxe5#
      • 1...Bf5
        • 2.Qd4#
      • 1...Sf3
        • 2.Qc4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sg6
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);N_PINQ(C)::QAR1(C)
    • S(c);N_PINQ(C),N_SPINS(e)::QAR1(C)
    • S(c);N_GUARD,S_CUTB(h)::QAB(C)
  • Tries
    • Try
      • B(G);CHECK,N_SPINQ(C),XR(g)
      • Refutation
        • R(i);P_PINQ(C),XB(G)
    • Try
      • R(E);N_SPINQ(C)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_SPINS(e),XR(E)::QAR1(C)
        • R(i);::QAR1(C)
      • Refutation
        • P(b);XS(D)
  • Actual
    • Q(C);
    • Threat
      • R1(E),XS(e)
    • Vars
      • B(h);N_PINQ(C),N_SPINS(e)::QAR1(C)
      • S(c);N_PINQ(C)::QAB1(C)
      • S(c);N_PINQ(C),N_SPINS(e)::QAB1(C)
      • S(c);N_GUARD,S_CUTB(h)::QAB(C)
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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).