MESON Chess Problem Database

Problem Display
PID: 214491 (8/R3Q3/5NN1/3K1k1b/Rb6/5pr1/8/8 w - - 0 1)

Little, JM

Australasian (The), 1879

8/R3Q3/5NN1/3K1k1b/Rb6/5pr1/8/8

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg6
      • 2.Qe5#
    • 1...Bxg6
      • 2.Qe5#
  • Tries
    • 1.Sh4+?
      • 1...Kf4
        • 2.Qe5#
      • 1...Kg5!
    • 1.Qe6+?
      • 1...Kxg6
        • 2.Se4#
        • 2.Sh7#
      • 1...Kg5!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Qe4#
        • 2.Qe6#
      • 1...Kg4
        • 2.Qe6#
        • 2.Qd7#
      • 1...Kxg6
        • 2.Qf6#
        • 2.Qe6#
      • 1...Rxg6
        • 2.Qe4#
      • 1...Bxe7
        • 2.Sxe7#
      • 1...Bxg6
        • 2.Qe4#
      • 1...Rg4
        • 2.Qf6#
        • 2.Qe6#
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XS(D)::QAR1(F)
    • B(e);SBLOCK,XS(D)::QAR1(F)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINB(c)::QAB1(F)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);SBLOCK,XS(D)::QAB1(F)
      • B(c);XQ(F)::S(D),XB(c)
      • B(e);SBLOCK,XS(D)::QAB1(F)
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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).