MESON Chess Problem Database

Problem Display
PID: 42187 (8/4R3/B2p2p1/R1n1pkB1/4p2K/b1Np4/b7/8 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1946

8/4R3/B2p2p1/R1n1pkB1/4p2K/b1Np4/b7/8

#2

6 + 9

3979 Systematic Terminology 1984
15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Bc8#
    • 1...Se6
      • 2.Rf7#
  • Tries
    • 1.Bc8+?
      • 1...Be6
        • 2.Rf7#
      • 1...Se6
        • 2.Rf7#
      • 1...Sd7!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sxd6#
      • 1...Sxa6
        • 2.Sd4#
      • 1...Sb3
        • 2.Bc8#
      • 1...Sa4
        • 2.Sd4#
      • 1...Se6
        • 2.Rf7#
      • 1...Sb7
        • 2.Sd4#
      • 1...Sd7
        • 2.Sd4#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD,P_SPINP(f),S_CUTB(a)::B(E)
    • S(e);P_SPINP(f),SBLOCK,S_CUTB(a)::R(F)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • B(a);P_SPINB(a)::R(F)
        • S(e);P_SPINP(f),P_SPINS(e)::R(F)
      • Refutation
        • S(e);P_SPINP(f),P_SPINS(e)
  • Actual
    • S(A);
    • Threat
      • S(A),XP(h)
    • Vars
      • S(e);S_CUTP(f),XB(E)::S(A)
      • S(e);N_GUARD,S_CUTB(a)::B(E)
      • S(e);S_CUTP(f)::S(A)
      • S(e);SBLOCK,S_CUTB(a)::R(F)
      • P(h);::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).