MESON Chess Problem Database

Problem Display
PID: 87923 (1b2nR2/5qp1/4N1b1/1R2rk1N/2Q4P/8/KPPr1n1B/8 w - - 0 1)

Gamage, Frederick

American Chess Problemist, 1949

1b2nR2/5qp1/4N1b1/1R2rk1N/2Q4P/8/KPPr1n1B/8

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Sg3#
    • 1...Rd6
      • 2.Rxe5#
    • 1...Ba7
      • 2.Rxe5#
    • 1...Sd6
      • 2.Sexg7#
      • 2.Rxe5#
    • 1...Sf6
      • 2.Sg3#
    • 1...Sc7
      • 2.Sexg7#
      • 2.Rxe5#
  • Tries
    • 1.Rxf7+?
      • 1...Sf6
        • 2.Sg3#
        • 2.Shxg7#
        • 2.Sexg7#
      • 1...Bxf7!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qe6#
      • 1...Rdd5
        • 2.Qf4#
      • 1...Rd6
        • 2.Rxe5#
      • 1...Red5
        • 2.Qc8#
      • 1...Sf6
        • 2.Sg3#
      • 1...Sc7
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(f);::S(H)
    • R(a);S_CUTB(h)::R1(G),XR(c)
    • B(h);N_GUARD::R1(G),XR(c)
    • S(i);N_SPINQ(f),SBLOCK::S(H)
  • Tries
    • Try
      • R(J);CHECK,XQ(f)
      • Refutation
        • B(e);XR(J)
  • Actual
    • S(I);P_SPINQ(E)
    • Threat
      • QAB1(E)
    • Vars
      • R(a);N_PINQ(E),N_SPINR(c)::QAR1(E)
      • R(a);S_CUTB(h)::R1(G),XR(c)
      • R(c);N_PINQ(E)::QAB(E)
      • S(i);N_SPINQ(f),SBLOCK::S(H)
      • S(i);S_CUTB(h)::R1(G),XR(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).