MESON Chess Problem Database

Problem Display
PID: 174795 (8/6K1/5N1P/4n1k1/6N1/8/5Q2/8 w - - 0 1)

Barth, Michael

Freie Presse, 1989

8/6K1/5N1P/4n1k1/6N1/8/5Q2/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Se3?
      • 1...Sf3
        • 2.Qg3#
      • 1...Sd3
        • 2.Qg3#
      • 1...Sc4
        • 2.Qg3#
      • 1...Sc6
        • 2.Qg3#
      • 1...Sg6
        • 2.Qg3#
      • 1...Sd7
        • 2.Qg3#
      • 1...Sf7
        • 2.Qg3#
      • 1...Sg4!
    • 1.Se4+?
      • 1...Kh5
        • 2.Sgf6#
      • 1...Kxg4!
    • 1.Sh7+?
      • 1...Kh5
        • 2.Sgf6#
      • 1...Kxg4!
    • 1.Qe3+?
      • 1...Kf5
        • 2.Qxe5#
      • 1...Kh4!
  • Keys
    • 1.Qg3!
      • 1...Kf5
        • 2.Qxe5#
      • 1...Sxg4
        • 2.Qxg4#
      • 1...Sd3
        • 2.Se3#
      • 1...Sf3
        • 2.Se3#
      • 1...Sc4
        • 2.Se3#
      • 1...Sc6
        • 2.Se3#
      • 1...Sg6
        • 2.Se3#
      • 1...Sd7
        • 2.Se3#
      • 1...Sf7
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • S(a);N_GUARD::QAR2(A)
      • Refutation
        • S(a);
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(B)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(B)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A),XS(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A),XS(a)
      • S(a);OGATE,P_SPINS(a),XS(B)::QAR1(A),XS(a)
      • S(a);N_GUARD::QAR(A)+S(B)
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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).