MESON Chess Problem Database

Problem Display
PID: 51302 (2n1Q3/1Pb2p2/1n1kb1N1/8/1P1P4/4N3/8/6K1 w - - 0 1)

Russ, Colin Albert Harry

Manchester Guardian, 1956

2n1Q3/1Pb2p2/1n1kb1N1/8/1P1P4/4N3/8/6K1

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Sf5#
    • 1...Sd5
      • 2.Sc4#
  • Tries
    • 1.b5?
      • threat
        • 2.Qc6#
      • 1...Bd5
        • 2.Sf5#
      • 1...Bd7
        • 2.Qe5#
      • 1...Sd7
        • 2.bxc8S#
      • 1...Sa7
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...fxg6!
  • Keys
    • 1.d5!
      • threat
        • 2.Qc6#
      • 1...Bxd5
        • 2.Sf5#
      • 1...Sxd5
        • 2.Sc4#
      • 1...fxg6
        • 2.Qxe6#
      • 1...Bd7
        • 2.Qe5#
      • 1...Sd7
        • 2.bxc8S#
      • 1...Sa7
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD,SBLOCK::S(B)
    • S(a);N_GUARD,SBLOCK,S_CUTB(c)::S(B)
  • Tries
    • Try
      • P(C);
      • Threat
        • QAR1(G)
      • Vars
        • B(c);N_GUARD,SBLOCK::S(B)
        • B(c);OGATE,SBLOCK::QAB1(G)
        • S(a);N_GUARD,S_CUTB(c)::PXS(f)=S
        • S(f);N_GUARD::QAB1(G)
        • S(f);N_GUARD::QAB1(G),XS(f)
      • Refutation
        • P(e);XS(E)
  • Actual
    • P(D);
    • Threat
      • QAR1(G)
    • Vars
      • B(c);N_GUARD,SBLOCK,XP(D)::S(B)
      • S(a);N_GUARD,SBLOCK,XP(D)::S(B)
      • P(e);N_GUARD,XS(E)::QAR1(G),XB(c)
      • B(c);OGATE,SBLOCK::QAB1(G)
      • S(a);N_GUARD,S_CUTB(c)::PXS(f)=S
      • S(f);N_GUARD::QAB1(G)
      • S(f);N_GUARD::QAB1(G),XS(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).