MESON Chess Problem Database

Problem Display
PID: 200243 (bK6/N2p1B2/3k2N1/R2P4/8/1prpR3/6p1/4brB1 w - - 0 1)

Clark, Cecil Henry Douglas

The Observer, 1947

(First published on Sun Dec 14 1947)

bK6/N2p1B2/3k2N1/R2P4/8/1prpR3/6p1/4brB1

#2

8 + 9

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8+
      • 2.Sxc8#
    • 1...Bxd5
      • 2.Rxd5#
    • 1...Bc6
      • 2.Sc8#
  • Tries
    • 1.Bh2+?
      • 1...Rf4
        • 2.Bxf4#
      • 1...Bg3!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Sb5#
      • 1...Rc8+
        • 2.Sxc8#
      • 1...Rxg1
        • 2.Rf6#
      • 1...Bxd5
        • 2.Rxd5#
      • 1...Rf2
        • 2.Bh2#
      • 1...Rc5
        • 2.Bxc5#
      • 1...Bf2
        • 2.Rf6#
      • 1...Bc6
        • 2.Sc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,N_GUARD::S(F),XR(e)
    • B(i);OGATE,XP(D)::R1(C),XB(i)
    • B(i);S_CUTR(e)::S(F)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::B(A),XR(b)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • R(B);
    • Threat
      • S(F)
    • Vars
      • R(e);CHECK,N_GUARD::S(F),XR(e)
      • R(b);N_GUARD,XB(A)::R(B)
      • B(i);OGATE,XP(D)::R1(C),XB(i)
      • R(b);S_CUTB(a)::B(A)
      • R(e);N_GUARD::B(A),XR(e)
      • B(a);S_CUTR(b)::R(B)
      • B(i);S_CUTR(e)::S(F)
HTML5 logo

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).