MESON Chess Problem Database

Problem Display
PID: 183333 (8/3p2BN/p1pp2Rb/Rnn2kpP/1KQ3qr/3pP2B/3N4/8 w - - 0 1)

Clark, Cecil Henry Douglas

The Problemist, 1943

8/3p2BN/p1pp2Rb/Rnn2kpP/1KQ3qr/3pP2B/3N4/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg7
      • 2.Rxg5#
    • 1...Sa3
      • 2.Qe4#
    • 1...Sd4
      • 2.Qxd3#
      • 2.Qf7#
    • 1...Sa7
      • 2.Qe4#
    • 1...Sc7
      • 2.Qe4#
    • 1...Sb3
      • 2.Qe4#
    • 1...Sa4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Se6
      • 2.Qe4#
    • 1...Sb7
      • 2.Qe4#
  • Tries
    • 1.e4+?
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Kf4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Rf6#
      • 1...Bxg7
        • 2.Rxg5#
      • 1...Sd4
        • 2.Qxd3#
      • 1...Se4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • B(k);N_GUARD,XB(I)::R1(H),XP(g)
    • S(d);P_SPINS(e)::QAB1(E)
    • S(e);N_GUARD,P_SPINS(d)::QAB1(E)
    • S(e);N_GUARD,N_PINQ(E),P_SPINS(d)::QAB1(E),XS(e)
  • Tries
    • Try
      • P(B);CHECK,N_SPINQ(E)
      • Vars
        • S(e);OGATE,P_SPINS(d),XP(B)::QAB1(E),XS(e)
      • Refutation
        • K(f);N_SPINQ(b),P-FLIGHT
  • Actual
    • S(A);
    • Threat
      • R1(H)
    • Vars
      • B(k);N_GUARD,XB(I)::R1(H),XP(g)
      • S(d);N_PINQ(E),P_SPINS(e)::QAB(E),XP(a)
      • S(e);N_PINQ(E),P_SPINS(d),SBLOCK::S(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).