MESON Chess Problem Database

Problem Display
PID: 108651 (4N2q/5NR1/6n1/3n3k/6p1/2R3P1/8/K7 w - - 0 1)

Klar, Eugene

Bulletin de l'UPF, 1936

4N2q/5NR1/6n1/3n3k/6p1/2R3P1/8/K7

#2

6 + 5

6490 yacpdb 2009
136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg7
      • 2.Sxg7#
    • 1...Qh7
      • 2.Rxh7#
    • 1...Qxe8
      • 2.Rh7#
    • 1...Sxc3
      • 2.Sf6#
    • 1...Se3
      • 2.Sf6#
    • 1...Sb4
      • 2.Sf6#
    • 1...Sdf4
      • 2.Sf6#
    • 1...Sb6
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sc7
      • 2.Sf6#
    • 1...Sde7
      • 2.Sf6#
    • 1...Sgf4
      • 2.Rg5#
    • 1...Sh4
      • 2.Rg5#
    • 1...Se5
      • 2.Rg5#
    • 1...Sge7
      • 2.Rg5#
    • 1...Sf8
      • 2.Rg5#
  • Keys
    • 1.Rc5!
      • threat
        • 2.Sf6#
      • 1...Qxg7+
        • 2.Sxg7#
      • 1...Qxe8
        • 2.Rh7#
      • 1...Se5
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 13
  • Sets
    • Q(e);P_PINR(B),XR(E)::S(F),XQ(e)
    • Q(e);N_GUARD::R(E),XQ(e)
    • Q(e);N_GUARD,XS(F)::R(E)
    • S(b);N_GUARD,XR(B)::S(F)
    • S(b);N_GUARD::S(F)
    • S(b);N_GUARD::S(F),XS(b)
    • S(d);OGATE::R1(E)
  • Actual
    • R(B);P_PINS(b),P_SPINR(E)
    • Threat
      • S(F)
    • Vars
      • Q(e);CHECK,XR(E)::S(F),XQ(e)
      • Q(e);N_PINR(E),XS(F)::R(E)
      • S(d);N_PINR(E),N_SPINS(b)::R1(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).