MESON Chess Problem Database

Problem Display
PID: 67791 (6b1/B4Q2/n1p5/3q4/2k4r/P1N1RN2/P3P2p/5B1K w - - 0 1)

Widlert, Kjell Einar

3rd Place, Paris, 1984

6b1/B4Q2/n1p5/3q4/2k4r/P1N1RN2/P3P2p/5B1K

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sd2#
      • 2.Se5#
    • 1...Qxf7
      • 2.Sd2#
      • 2.Se5#
    • 1...Re4
      • 2.Sd2#
  • Tries
    • 1.Qxd5+?
      • 1...cxd5
        • 2.Sd2#
        • 2.Se5#
      • 1...Bxd5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb3#
      • 1...Qxf3+
        • 2.exf3#
      • 1...Qd1
        • 2.Se5#
        • 2.Qxa6#
      • 1...Qb5
        • 2.Sd2#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sc5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(c);N_PINS(H)::S(H)
  • Tries
    • Try
      • Q(J);CHECK,N_SPINS(H),XQ(d)
      • Refutation
        • B(g);P_PINS(H),XQ(J)
  • Actual
    • Q(J);N_PINQ(d)
    • Threat
      • QAB1(J)
    • Vars
      • Q(d);CHECK,OGATE,XS(H)::B(A)+P(D),XQ(d)
      • Q(d);N_PINS(H)::S(H)
      • S(e);N_GUARD::QAR1(J),XS(e)
      • S(e);N_GUARD::QAR1(J)
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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).