MESON Chess Problem Database

Problem Display
PID: 51317 (KN3n2/5p2/pRN2pq1/3k2p1/2p5/B4P2/4Q3/2r5 w - - 0 1)

Clark, Cecil Henry Douglas

Manchester Guardian, 1957

KN3n2/5p2/pRN2pq1/3k2p1/2p5/B4P2/4Q3/2r5

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qh5
      • 2.Qe4#
    • 1...Qh6
      • 2.Qe4#
    • 1...Qg7
      • 2.Qe4#
    • 1...Qg8
      • 2.Qe4#
    • 1...c3
      • 2.Qa2#
    • 1...a5
      • 2.Rb5#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Sb4+?
      • 1...Kc5
        • 2.Qf2#
        • 2.Qe3#
      • 1...Kd4!
    • 1.Qe3?
      • threat
        • 2.Sb4#
        • 2.Se7#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qb1
        • 2.Se7#
      • 1...Rb1
        • 2.Se7#
      • 1...a5
        • 2.Se7#
        • 2.Rb5#
      • 1...c3!
    • 1.Qe7?
      • threat
        • 2.Qd6#
      • 1...f5
        • 2.Qe5#
      • 1...c3!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qd6#
      • 1...Ke6
        • 2.Se7#
      • 1...c3
        • 2.Qa2#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_GUARD::QAB1(A),XQ(g)
    • Q(g);N_GUARD::QAB1(A)
    • P(b);OGATEB::QAB(A)
    • P(e);N_GUARD::R(D)
    • P(f);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);N_GUARD::QAB1(A),XQ(g)
        • Q(g);::S(E)
        • R(a);::S(E)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(f);N_GUARD::QAR1(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);S_FLIGHT::R(D)+S(E)
      • P(b);OGATEB::QAB(A)
      • P(f);N_GUARD::QAR1(A)
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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).