MESON Chess Problem Database

Problem Display
PID: 53267 (2b5/K1Q3p1/1R4Bq/5r1p/P4pn1/8/pN1Bn2p/rk4bR w - - 0 1)

Vaughan, Colin V

Schach-Express, 1950

2b5/K1Q3p1/1R4Bq/5r1p/P4pn1/8/pN1Bn2p/rk4bR

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qxc1#
    • 1...Sg3
      • 2.Qc1#
    • 1...Sd4
      • 2.Qc1#
    • 1...Sf2
      • 2.Sd1#
    • 1...Se3
      • 2.Sd1#
    • 1...Se5
      • 2.Sd3#
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...Sc3
        • 2.Qd3#
      • 1...Ba6
        • 2.Bxf5#
      • 1...Bb7
        • 2.Qd3#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sg3
        • 2.Qd3#
        • 2.Qc1#
      • 1...Sd4
        • 2.Qc1#
      • 1...Sf2
        • 2.Sd1#
      • 1...Se3
        • 2.Sd1#
      • 1...Se5
        • 2.Sd3#
      • 1...Sf6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD,N_SPINB(c)::QAR1(H),XS(e)
    • S(e);N_GUARD::QAR1(H)
    • S(e);N_GUARD,N_PINR(E)::QAR1(H)
    • S(h);N_PINR(E)::R(E)+S(B)
    • S(h);::R(E)+S(B)
  • Actual
    • Q(H);
    • Threat
      • DUALS(2)
    • Vars
      • S(e);::QAB(H)
      • B(m);N_GUARD::B(F),XR(i)
      • B(m);::QAB(H)
      • S(e);N_GUARD,N_SPINB(c)::QAR1(H),XS(e)
      • S(e);N_GUARD,N_PINR(E)::QAR1(H)
      • S(h);N_PINR(E)::R(E)+S(B)
      • S(h);::R(E)+S(B)
      • S(h);::QAB(H)
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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).