MESON Chess Problem Database

Problem Display
PID: 51131 (1nQ5/5Kp1/3p2p1/1p1k4/3bNpN1/3R4/p1Pp4/q2Br3 w - - 0 1)

Clark, Cecil Henry Douglas

Manchester Guardian, 1950

1nQ5/5Kp1/3p2p1/1p1k4/3bNpN1/3R4/p1Pp4/q2Br3

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Bf3#
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qb1
      • 2.Sc3#
    • 1...Qc1
      • 2.Sc3#
    • 1...Qxd1
      • 2.Sc3#
    • 1...Sc6
      • 2.Qe6#
  • Tries
    • 1.Sgf6+?
      • 1...Ke5
        • 2.Qe6#
      • 1...gxf6!
    • 1.Bf3?
      • threat
        • 2.Sc3#
        • 2.Sef6#
      • 1...Sc6
        • 2.Qe6#
      • 1...Qc3
        • 2.Sxc3#
        • 2.Sef6#
      • 1...Rxe4!
    • 1.Qc5+?
      • 1...Kxe4
        • 2.Bf3#
      • 1...dxc5!
  • Keys
    • 1.c3!
      • threat
        • 2.Rxd4#
      • 1...Kxe4
        • 2.Rxd4#
      • 1...Qxc3
        • 2.Sxc3#
      • 1...Rxe4
        • 2.Bb3#
      • 1...Sc6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(h);N_SPINB(e),OGATEB,S_FLIGHT,XS(D)::B(A)
    • Q(a);N_GUARD::S(D),XQ(a)
    • Q(a);N_GUARD::S(D)
    • Q(a);N_GUARD,XB(A)::S(D)
    • S(l);SBLOCK::QAB1(G)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(h);N_SPINB(e),P-FLIGHT::QAR1(G)
      • Refutation
        • P(k);XS(E)
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(l);SBLOCK::QAB1(G)
      • Refutation
        • R(b);P_SPINR(b),XS(D)
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);N_SPINB(e),S_FLIGHT,XS(D)::B(A)
      • Refutation
        • P(i);XQ(G)
  • Actual
    • P(B);
    • Threat
      • R1(C),XB(e)
    • Vars
      • K(h);N_SPINB(e),S_FLIGHT,XS(D)::R1(C),XB(e)
      • Q(a);XP(B)::S(D),XQ(a)
      • R(b);SBLOCK,XS(D)::B(A)
      • S(l);SBLOCK::QAB1(G)
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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).