MESON Chess Problem Database

Problem Display
PID: 150450 (Q1n5/b7/2p1B3/8/8/8/8/k1K5 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1948

Q1n5/b7/2p1B3/8/8/8/8/k1K5

#2

3 + 4

5454 Near Snap 2014
15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Qh8#
    • 1...Sd6
      • 2.Qxa7#
    • 1...Se7
      • 2.Qxa7#
  • Tries
    • 1.Bb3?
      • 1...Sb6
        • 2.Qh8#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Se7
        • 2.Qxa7#
      • 1...c5!
    • 1.Bc4?
      • 1...Sb6
        • 2.Qh8#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Se7
        • 2.Qxa7#
      • 1...c5!
    • 1.Bf7?
      • 1...Sb6
        • 2.Qh8#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Se7
        • 2.Qxa7#
      • 1...c5!
  • Keys
    • 1.Kc2!
      • 1...Sb6
        • 2.Qh8#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Se7
        • 2.Qxa7#
      • 1...c5
        • 2.Qh1#

Anticipated by 22047(1923), 22054(1924), 203312(1924), 81448(1929), 71670(1931), 79539(1947)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(d);OGATE::QAB(C)
    • S(d);N_GUARD::QAR(C),XB(c)
  • Tries
    • Try
      • B(B);
      • Vars
        • S(d);OGATE::QAB(C)
        • S(d);N_GUARD::QAR(C),XB(c)
      • Refutation
        • P(b);
    • Try
      • B(B);
      • Vars
        • S(d);OGATE::QAB(C)
        • S(d);N_GUARD::QAR(C),XB(c)
      • Refutation
        • P(b);
    • Try
      • B(B);
      • Vars
        • S(d);OGATE::QAB(C)
        • S(d);N_GUARD::QAR(C),XB(c)
      • Refutation
        • P(b);
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • S(d);OGATE::QAB(C)
      • S(d);N_GUARD::QAR(C),XB(c)
      • P(b);OGATE::QAB1(C)
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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).