MESON Chess Problem Database

Problem Display
PID: 43890 (2r4B/b4p2/n1p5/4NRp1/Rq1kN1KQ/2p1pP2/Bp6/8 w - - 0 1)

Clark, Cecil Henry Douglas

The Problemist, 1929

2r4B/b4p2/n1p5/4NRp1/Rq1kN1KQ/2p1pP2/Bp6/8

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Rxb4#
    • 1...Sc7
      • 2.Rxb4#
    • 1...Sb8
      • 2.Rxb4#
    • 1...e2
      • 2.Qf2#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qxc3#
        • 2.Qd1#
      • 1...Qxa4
        • 2.Qxc3#
      • 1...Qc4
        • 2.Qd1#
      • 1...e2
        • 2.Qf2#
        • 2.Qxc3#
        • 2.Qg1#
      • 1...b1Q
        • 2.Qxc3#
      • 1...b1B
        • 2.Qxc3#
      • 1...b1R
        • 2.Qxc3#
      • 1...Sc5
        • 2.Rxb4#
        • 2.Qxc3#
      • 1...c2
        • 2.Qc3#
      • 1...b1S!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sxc6#
      • 1...Kxc5+
        • 2.Sc4#
      • 1...Bxc5
        • 2.Kxg5#
      • 1...Sxc5
        • 2.Rxb4#
      • 1...e2
        • 2.Qf2#
      • 1...f6
        • 2.Se6#

This is a version of 274688

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD::R(C),XQ(d)
    • P(c);OGATEB::QAB(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(d);N_SPINQ(d),XR(C)::QAB1(F),XP(b)
        • Q(d);::QAR(F)
        • P(a);::QAB1(F),XP(b)
        • P(b);::QAB1(F)
      • Refutation
        • P(a);
  • Actual
    • S(D);
    • Threat
      • B(I)+S(G),DCHECK,XP(h)
    • Vars
      • K(e);CHECK,N_SPINQ(d),S_FLIGHT,XS(D)::R(H)+S(G)
      • B(i);SBLOCK,XS(D)::QAR(F)+K(E),XP(f)
      • S(g);N_GUARD,SBLOCK,XS(D)::R(C),XQ(d)
      • P(c);OGATEB::QAB(F)
      • P(j);N_GUARD::S(D)
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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).