MESON Chess Problem Database

Problem Display
PID: 676 (N7/1n2K3/1Nk5/6R1/P3P3/4n3/6B1/6B1 w - - 0 1)

Easter, Norris

British Chess Magazine, 1932

N7/1n2K3/1Nk5/6R1/P3P3/4n3/6B1/6B1

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.e5#
    • 1...Sf1
      • 2.e5#
    • 1...Sc2
      • 2.e5#
    • 1...Sc4
      • 2.e5#
    • 1...Sg4
      • 2.e5#
    • 1...Sd5+
      • 2.exd5#
    • 1...Sf5+
      • 2.exf5#
  • Keys
    • 1.Sc4!
      • 1...Sd5+
        • 2.exd5#
      • 1...Sf5+
        • 2.exf5#
      • 1...Sxg2
        • 2.Se5#
      • 1...Sxc4
        • 2.e5#
      • 1...Sa5
        • 2.Sxa5#
      • 1...Sc5
        • 2.Sa5#
      • 1...Sd6
        • 2.Sa5#
      • 1...Sd8
        • 2.Sa5#
      • 1...Sd1
        • 2.Se5#
        • 2.e5#
      • 1...Sf1
        • 2.Se5#
        • 2.e5#
      • 1...Sc2
        • 2.Se5#
        • 2.e5#
      • 1...Sg4
        • 2.e5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::B(B)+P(D)
    • S(a);CHECK,OGATE::P(D),XS(a)
    • S(a);CHECK,OGATE::B(B)+P(D),XS(a)
  • Actual
    • S(F);
    • Vars
      • S(a);CHECK,OGATE::P(D),XS(a)
      • S(a);CHECK,OGATE::B(B)+P(D),XS(a)
      • S(a);XB(B)::S(F)
      • S(a);N_GUARD,XS(F)::B(B)+P(D)
      • S(c);N_GUARD::S(F),XS(c)
      • S(c);N_GUARD::S(F)
      • S(a);N_GUARD::B(B)+P(D)
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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).