MESON Chess Problem Database

Problem Display
PID: 780 (3R4/8/KNkB2b1/8/2pp3n/4n3/6N1/7B w - - 0 1)

Sedgwick, Stanley

British Chess Magazine, 1958

3R4/8/KNkB2b1/8/2pp3n/4n3/6N1/7B

#2

6 + 6

3310 2345 Chess Problems 1997
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sef5
      • 2.Sxh4#
    • 1...Shf5
      • 2.Sxe3#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sb4#
        • 2.Se7#
      • 1...Kxd5
        • 2.Sf4#
      • 1...Sc2
        • 2.Se7#
      • 1...Sef5
        • 2.Sb4#
      • 1...Shf5
        • 2.Sb4#
      • 1...Sxd5!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Sf4#
      • 1...Sd5
        • 2.Sa7#
      • 1...Sef5
        • 2.Sxh4#
      • 1...Shf5
        • 2.Sxe3#

Anticipated by 18309(1954)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,S_CUTB(f)::B(A)+S(B),XS(d)
    • S(d);N_GUARD,S_CUTB(f)::B(A)+S(B),XS(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT,XS(D)::B(A)+S(B),DCHECK
        • S(a);::S(D)
        • S(d);::S(D)
      • Refutation
        • S(a);XS(D)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(e);S_FLIGHT::B(A)+S(B),DCHECK
      • S(a);SBLOCK::S(D)
      • S(a);N_GUARD,S_CUTB(f)::B(A)+S(B),XS(d)
      • S(d);N_GUARD,S_CUTB(f)::B(A)+S(B),XS(a)
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).