MESON Chess Problem Database

Problem Display
PID: 46635 (6NQ/3k4/R7/6r1/2K4B/8/8/8 w - - 0 1)

Eliassen, Harald

Prize, Skakbladet TT, 1960

6NQ/3k4/R7/6r1/2K4B/8/8/8

#2

5 + 2

4884 154 norske miniatyrproblemer 1974

SOLUTION

  • SOUND
  • Tries
    • 1.Sf6+?
      • 1...Ke7
        • 2.Qe8#
      • 1...Kc7!
    • 1.Qg7+?
      • 1...Kc8
        • 2.Ra8#
      • 1...Kd8
        • 2.Ra8#
      • 1...Ke8
        • 2.Ra8#
        • 2.Qe7#
      • 1...Rxg7!
    • 1.Qh7+?
      • 1...Kc8
        • 2.Ra8#
      • 1...Kd8
        • 2.Ra8#
      • 1...Ke8
        • 2.Ra8#
        • 2.Qe7#
      • 1...Rg7!
  • Keys
    • 1.Ra7+!
      • 1...Kc6
        • 2.Qf6#
      • 1...Kd6
        • 2.Qf6#
      • 1...Ke6
        • 2.Qf6#
      • 1...Kc8
        • 2.Se7#
      • 1...Kd8
        • 2.Sh6#
      • 1...Ke8
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::R(C)
        • K(b);P-FLIGHT,P_SPINR(a)::R(C)
      • Refutation
        • R(a);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::R(C)
        • K(b);P-FLIGHT,P_SPINR(a)::R(C)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • R(C);CHECK
    • Vars
      • K(b);S_FLIGHT::QAR(E)
      • K(b);P-FLIGHT::QAR2(E)
      • K(b);S_FLIGHT::QAR1(E)
      • K(b);S_FLIGHT::QAR(E)+S(D),DCHECK
      • K(b);P-FLIGHT,P_SPINR(a)::QAR(E)+S(D)
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).