MESON Chess Problem Database

Problem Display
PID: 179575 (7b/2P1Rq1P/4Nknp/3Q2p1/6P1/8/8/6K1 w - - 0 1)

Anonymous

British Chess Magazine 15. (Healey MT) Ty., 1909-1910

7b/2P1Rq1P/4Nknp/3Q2p1/6P1/8/8/6K1

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Qxe6#
    • 1...Qg8
      • 2.hxg8S#
    • 1...Qxe7
      • 2.Qf5#
    • 1...h5
      • 2.Qxg5#
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rxf7#
        • 2.Qxf7#
      • 1...Kxe7
        • 2.Qd8#
      • 1...Kg7
        • 2.Rxf7#
        • 2.Qxf7#
      • 1...Qxd5
        • 2.Sxd5#
      • 1...Qxe7
        • 2.Sh5#
      • 1...Qxh7
        • 2.Qe6#
        • 2.Qd6#
      • 1...Sxf4
        • 2.Qxf7#
      • 1...Sxe7
        • 2.Qd4#
      • 1...gxf4
        • 2.Rxf7#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Qe8
        • 2.Qe6#
        • 2.Qd6#
      • 1...Qg8
        • 2.hxg8S#
      • 1...Qg7
        • 2.Qe6#
        • 2.Qd6#
      • 1...Qf8
        • 2.Qe6#
        • 2.Qd6#
      • 1...Se5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE,XS(D)::QAR1(C),XQ(e)
    • Q(e);OGATE::PXQ(e)=S
    • Q(e);SBLOCK,XR(F)::QAR1(C)
    • P(d);N_GUARD::QAB1(C),XP(a)
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(C)
      • Q(e);XQ(C)::S(D),XQ(e)
      • Q(e);SBLOCK,XR(F)::S(D)
      • S(c);XS(D)::QAR1(C),XQ(e)
      • S(c);N_GUARD,SBLOCK,XR(F)::QAB(C)
      • P(a);XS(D)::R1(F),XQ(e)
      • Q(e);N_GUARD::QAR1(C),XQ(e)
      • Q(e);OGATE::PXQ(e)=S
      • S(c);N_GUARD::QAB1(C),XS(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).