MESON Chess Problem Database

Problem Display
PID: 265163 (8/4PkNR/8/8/b2K3P/Q7/8/8 w - - 0 1)

Gamma, Alex

Schweizerische Schachzeitung, 2013

8/4PkNR/8/8/b2K3P/Q7/8/8

#2

6 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sh5+?
      • 1...Kg6
        • 2.Qd3#
      • 1...Ke8
        • 2.Sf6#
        • 2.Qxa4#
      • 1...Kg8
        • 2.Sf6#
      • 1...Ke6!
    • 1.e8Q+?
      • 1...Kf6
        • 2.Qd6#
        • 2.Qae7#
        • 2.Qaf8#
        • 2.Qf3#
        • 2.Qe6#
      • 1...Bxe8!
  • Keys
    • 1.Se8+!
      • 1...Ke6
        • 2.Qh3#
      • 1...Kg6
        • 2.Qd3#
      • 1...Kxe8
        • 2.Qxa4#
      • 1...Kg8
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(A)
        • K(b);N_GUARD,S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(D);CHECK
      • Refutation
        • B(a);XQ(D)
  • Actual
    • S(E);CHECK
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB(A)
      • K(b);N_GUARD,S_FLIGHT,XS(E)::QAB(A),XB(a)
      • K(b);N_GUARD,S_FLIGHT::S(E)
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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).