MESON Chess Problem Database

Problem Display
PID: 49891 (8/8/3BR3/b2n4/8/3P3n/4Bk2/2Q1N2K w - - 0 1)

Degener, Udo

1st HM., Die Schwalbe, 1994

8/8/3BR3/b2n4/8/3P3n/4Bk2/2Q1N2K

#2

7 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sg2?
      • threat
        • 2.Qf1#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sdf4
        • 2.Qe3#
      • 1...Be1
        • 2.Qxe1#
      • 1...Shf4!
    • 1.Sf3?
      • threat
        • 2.Qf1#
      • 1...Shf4
        • 2.Qg1#
      • 1...Se3
        • 2.Qxe3#
      • 1...Be1
        • 2.Qxe1#
      • 1...Sdf4!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qf1#
      • 1...Shf4
        • 2.Qg1#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sdf4
        • 2.Qe3#
      • 1...Be1
        • 2.Qxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • S(d);N_GUARD::QAB1(A),XS(d)
        • S(d);N_GUARD::QAB1(A)
        • B(c);N_GUARD::QAB1(A),XB(c)
      • Refutation
        • S(b);
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);N_GUARD::QAB1(A)
        • S(d);N_GUARD::QAB1(A),XS(d)
        • B(c);N_GUARD::QAB1(A),XB(c)
      • Refutation
        • S(d);
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • S(b);N_GUARD::QAB1(A)
      • S(d);N_GUARD::QAB1(A),XS(d)
      • S(d);N_GUARD::QAB1(A)
      • B(c);N_GUARD::QAB1(A),XB(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).