MESON Chess Problem Database

Problem Display
PID: 121494 (8/N2qPQ2/1p1k4/1n3p2/1K6/4N2b/8/8 w - - 0 1)

Scheel, Johan

Tidskrift for Schack, 1916

8/N2qPQ2/1p1k4/1n3p2/1K6/4N2b/8/8

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Sc4#
  • Tries
    • 1.e8S+?
      • 1...Qxe8
        • 2.Sc4#
      • 1...Ke5!
  • Keys
    • 1.e8Q!
      • threat
        • 2.Qfxd7#
      • 1...Kc7
        • 2.Qfxd7#
      • 1...Qxe8
        • 2.Sc4#
      • 1...Qxa7
        • 2.Sc4#
        • 2.Qee6#
      • 1...Qxf7
        • 2.Sxb5#
      • 1...Qe7
        • 2.Qfxe7#
        • 2.Qexe7#
      • 1...Qc6
        • 2.Qfe7#
        • 2.Qee6#
        • 2.Qee7#
      • 1...Qe6
        • 2.Qexe6#
      • 1...Qc8
        • 2.Sxb5#
        • 2.Sxc8#
        • 2.Qfe7#
        • 2.Qee7#
      • 1...Qb7
        • 2.Sc4#
        • 2.Sxb5#
        • 2.Qee6#
      • 1...Qc7
        • 2.Sxb5#
        • 2.Qd5#
        • 2.Qfe6#
        • 2.Qg6#
        • 2.Qf6#
        • 2.Qee6#
      • 1...Qd8
        • 2.Sc4#
        • 2.Sxb5#
        • 2.Qee6#
      • 1...f4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::S(A)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • Q(f);XS(D)::S(A)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • P(D);
    • Threat
      • QAR1(E),XQ(f)
    • Vars
      • K(e);P_SPINQ(f),S_FLIGHT::QAR1(E),XQ(f)
      • Q(f);XQ(D)::S(A)
      • Q(f);N_GUARD,XQ(E)::S(C),XS(b)
      • Q(f);N_GUARD::QAR1(D),XQ(f)
      • P(c);OGATE::QAB(E),XP(c)
HTML5 logo

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).