MESON Chess Problem Database

Problem Display
PID: 142808 (1K6/5pN1/2b1p3/Q5NB/5k1p/3p4/1p3B2/1q6 w - - 0 1)

Larsen, Karl Adolf Koefoed

Skakbladet, 1916

1K6/5pN1/2b1p3/Q5NB/5k1p/3p4/1p3B2/1q6

#2

6 + 8

756 Norsk Sjakkblad 1919

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Sh3#
    • 1...e5
      • 2.Qd2#
    • 1...f5
      • 2.S7xe6#
    • 1...f6
      • 2.S7xe6#
  • Tries
    • 1.S5xe6+?
      • 1...Ke4
        • 2.Qf5#
      • 1...fxe6!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qf6#
      • 1...Kxg5
        • 2.Be3#
      • 1...Be4
        • 2.Sh3#
      • 1...d2
        • 2.Qe3#
      • 1...e5
        • 2.Qd2#
      • 1...f5
        • 2.S7xe6#
      • 1...f6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(f);SBLOCK::S(C)
    • P(g);SBLOCK::QAB(B)
    • P(h);N_GUARD::S(E),XP(g)
  • Tries
    • Try
      • S(C);CHECK,XP(g)
      • Vars
        • K(d);P-FLIGHT::QAB1(B)
      • Refutation
        • P(h);XS(C)
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(d);S_FLIGHT,XS(C)::B(A)
      • B(f);SBLOCK::S(C)
      • P(c);OGATE::QAB1(B)
      • P(g);SBLOCK::QAB(B)
      • P(h);N_GUARD,SBLOCK::S(E),XP(g)
      • P(h);::QAR2(B),XP(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).