MESON Chess Problem Database

Problem Display
PID: 152977 (8/8/2K2p1Q/5Pn1/2R2np1/2B1k3/1NR3pN/6b1 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1943

8/8/2K2p1Q/5Pn1/2R2np1/2B1k3/1NR3pN/6b1

#2

8 + 7

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sd1#
    • 1...Sf3
      • 2.Sxg4#
      • 2.Qxf4#
    • 1...Se4
      • 2.Bd4#
    • 1...Sf7
      • 2.Qxf4#
    • 1...Sh7
      • 2.Qxf4#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Sd1#
        • 2.Sc4#
      • 1...Se2
        • 2.Sd1#
      • 1...Bxh2!
  • Keys
    • 1.Qh4!
      • 1...Bxh2
        • 2.Qf2#
      • 1...Bf2
        • 2.Qxf2#
      • 1...Se2
        • 2.Bd2#
      • 1...Sd3
        • 2.Sd1#
      • 1...Sfh3
        • 2.Qe1#
      • 1...Sd5
        • 2.Qe1#
      • 1...Sh5
        • 2.Qe1#
      • 1...Sfe6
        • 2.Qe1#
      • 1...Sg6
        • 2.Qe1#
      • 1...Sf3
        • 2.Sxg4#
      • 1...Sgh3
        • 2.Qg3#
      • 1...Se4
        • 2.Bd4#
      • 1...Sge6
        • 2.Qg3#
      • 1...Sf7
        • 2.Qg3#
      • 1...Sh7
        • 2.Qg3#
      • 1...g3
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • S(d);P_SPINS(f),SBLOCK::S(A)
    • S(f);P_SPINS(d),SBLOCK::B(D)
    • S(f);OGATE,P_SPINS(d)::QAB1(H),XS(d)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);P_SPINS(f)::S(A)
      • Refutation
        • B(a);XS(C)
  • Actual
    • Q(H);
    • Vars
      • B(a);N_GUARD,XS(C)::QAB1(H)
      • B(a);N_GUARD::QAB1(H),XB(a)
      • S(d);SBLOCK::B(D)
      • S(d);SBLOCK::S(A)
      • S(d);N_GUARD::QAR2(H)
      • S(f);SBLOCK::S(C),XP(e)
      • S(f);N_GUARD::QAR2(H)
      • S(f);SBLOCK::B(D)
      • P(e);OGATE::QAB1(H),XS(d)
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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).