MESON Chess Problem Database

Problem Display
PID: 51487 (8/8/3P3K/1R6/1pNk1p2/q4P1n/1RQ4B/1n6 w - - 0 1)

Davison, HD

The Guardian, 1962

8/8/3P3K/1R6/1pNk1p2/q4P1n/1RQ4B/1n6

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Qe4#
  • Tries
    • 1.Se5?
      • threat
        • 2.Qc5#
      • 1...Ke3
        • 2.Qe4#
        • 2.Qc5#
      • 1...Qc3
        • 2.Qe4#
      • 1...Qa7
        • 2.Qd3#
      • 1...Sc3
        • 2.Qd3#
        • 2.Qd2#
      • 1...b3
        • 2.Qd3#
      • 1...Qxf3!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sf5#
      • 1...Kxe3
        • 2.Qe4#
      • 1...Qxe3
        • 2.R2xb4#
      • 1...fxe3
        • 2.Be5#
      • 1...Qc3
        • 2.Qe4#
      • 1...Qd3
        • 2.Qc5#
      • 1...Sc3
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(b);SBLOCK::QAR1(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • Q(b);SBLOCK::QAR1(B)
        • Q(b);N_GUARD::QAR1(B)
        • P(d);S_CUTQ(b)::QAR1(B)
      • Refutation
        • Q(b);XP(D)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(e);S_FLIGHT,XS(E)::QAR1(B)
      • Q(b);N_GUARD,SBLOCK,XS(E)::R(A),XP(d)
      • P(f);OGATE,SBLOCK,XS(E)::B(C)
      • Q(b);SBLOCK::QAR1(B)
      • Q(b);SBLOCK::QAB1(B)
      • S(a);N_GUARD,S_CUTQ(b)::QAR2(B)
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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).