MESON Chess Problem Database

Problem Display
PID: 223010 (5Q2/2p2Bp1/2pp1Bp1/4N1R1/1r1k2K1/q2N1P2/3P1b2/8 w - - 0 1)

Clark, Cecil Henry Douglas

British Chess Magazine, 1930

5Q2/2p2Bp1/2pp1Bp1/4N1R1/1r1k2K1/q2N1P2/3P1b2/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Sxc6#
    • 1...dxe5
      • 2.Qd8#
    • 1...d5
      • 2.Qc5#
  • Tries
    • 1.Sxf2?
      • threat
        • 2.Sxc6#
      • 1...Kc5+
        • 2.Sc4#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...dxe5
        • 2.Bxe5#
      • 1...c5
        • 2.Sc6#
      • 1...d5!
    • 1.Sf4?
      • threat
        • 2.Sxc6#
      • 1...Kc5
        • 2.Sc4#
        • 2.Sd7#
      • 1...dxe5
        • 2.Bxe5#
      • 1...c5
        • 2.Se2#
        • 2.Sc6#
      • 1...d5
        • 2.Se2#
        • 2.Se6#
      • 1...Qxf3+!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sxc6#
      • 1...Kxc5+
        • 2.Sc4#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...dxc5
        • 2.Qd8#
      • 1...dxe5
        • 2.Bxe5#
      • 1...d5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK,XS(B)::B(G)+S(E),DCHECK,XP(e)
    • P(f);OGATEB,P_SPINP(f),XS(E)::QAR(I)
    • P(f);OGATE::QAB1(I)
  • Tries
    • Try
      • S(B);XB(a)
      • Threat
        • B(G)+S(E),DCHECK,XP(e)
      • Vars
        • K(d);CHECK,P_SPINP(f),S_FLIGHT::R(F)+S(E)
        • Q(b);CHECK,XP(C)::B(G)+S(E),DCHECK,XQ(b)
        • P(f);OGATE,P_SPINP(f),XS(E)::B(G),XP(f)
        • P(e);::B(G)+S(E),DCHECK
      • Refutation
        • P(f);
    • Try
      • S(B);
      • Threat
        • B(G)+S(E),DCHECK,XP(e)
      • Vars
        • P(f);OGATE,P_SPINP(f),XS(E)::B(G),XP(f)
      • Refutation
        • Q(b);CHECK,XP(C)
  • Actual
    • S(B);
    • Threat
      • B(G)+S(E),DCHECK,XP(e)
    • Vars
      • K(d);CHECK,P_SPINP(f),S_FLIGHT,XS(B)::R(F)+S(E)
      • Q(b);CHECK,XP(C)::B(G)+S(E),DCHECK,XQ(b)
      • P(f);OGATEB,SBLOCK,XS(B)::QAR(I)
      • P(f);OGATE,P_SPINP(f),XS(E)::B(G),XP(f)
      • P(f);SBLOCK::S(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).