MESON Chess Problem Database

Problem Display
PID: 146502 (3B2n1/1K5p/3pP1k1/1R3N2/5p2/8/2Q3N1/3B3b w - - 0 1)

Vaughan, Colin V

Die Schwalbe, 1951

3B2n1/1K5p/3pP1k1/1R3N2/5p2/8/2Q3N1/3B3b

#2

8 + 6

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg2+
      • 2.Qxg2#
    • 1...f3
      • 2.Sf4#
    • 1...d5
      • 2.Sxf4#
      • 2.Sgh4#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qg7#
      • 1...Sf6
        • 2.Qxf6#
      • 1...f3
        • 2.Sf4#
      • 1...d5
        • 2.Sgh4#
      • 1...Bxg2+!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qg7#
      • 1...Bxg2+
        • 2.Qxg2#
      • 1...Sf6
        • 2.Qxf6#
      • 1...f3
        • 2.Sf4#
      • 1...d5
        • 2.Sgh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,OGATE,XS(C)::QAR(B),XB(a)
    • P(b);N_PINS(C)::S(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • S(f);N_GUARD::QAR1(B),XS(f)
        • P(b);N_PINS(C)::S(C)
        • P(c);N_PINS(C)::S(C)
      • Refutation
        • B(a);CHECK,XS(C)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • B(a);CHECK,OGATE,XS(C)::QAR(B),XB(a)
      • S(f);N_GUARD::QAR1(B),XS(f)
      • P(b);N_PINS(C)::S(C)
      • P(c);N_PINS(C)::S(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).