MESON Chess Problem Database

Problem Display
PID: 153238 (1B1K4/8/R2pk3/r3pR2/pb2P3/3n4/2br4/Q7 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1944

1B1K4/8/R2pk3/r3pR2/pb2P3/3n4/2br4/Q7

#2

6 + 9

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Rxd6#
    • 1...Bc3
      • 2.Rxd6#
    • 1...Sc5
      • 2.Qxe5#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg6#
        • 2.Qg8#
      • 1...Sf4
        • 2.Qg8#
      • 1...Rg2!
    • 1.Qa2+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...Bb3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qc8#
      • 1...Bxc3
        • 2.Rxd6#
      • 1...Rc5
        • 2.Rxd6#
      • 1...Bc5
        • 2.Qc4#
      • 1...Sc5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);S_CUTB(e)::R1(D),XP(h)
    • B(e);N_GUARD::R1(D),XP(h)
    • S(c);N_GUARD,S_CUTR(f)::QAR1(A),XP(g)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::QAB(A)
      • Refutation
        • R(b);
    • Try
      • Q(A);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(A),XR(f)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(e);N_GUARD,XQ(A)::R1(D),XP(h)
      • R(f);S_CUTB(e)::R1(D),XP(h)
      • B(e);S_CUTR(f)::QAB(A)
      • S(c);N_GUARD,S_CUTR(f)::QAR1(A),XP(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).