Problem Display
PID: 247219 (8/3K4/4NB2/3k2p1/2p1p3/2r1r2n/3P4/3N4 w - - 0 1)

Hall, MA

Lipton, Michael

The Problemist, 1954

8/3K4/4NB2/3k2p1/2p1p3/2r1r2n/3P4/3N4

#2

5 + 7


SOLUTION


  • SOUND
  • Sets
    • 1...Rc1
      • 2.Sxe3#
    • 1...Rc2
      • 2.Sxe3#
    • 1...Re1
      • 2.Sxc3#
    • 1...Re2
      • 2.Sxc3#
  • Keys
    • 1.d4!
      • threat
        • 2.Sc7#
      • 1...cxd4 ep
        • 2.Sxe3#
      • 1...exd4 ep
        • 2.Sxc3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::S(A),XR(b)
    • R(b);N_GUARD::S(A),XR(a)
  • Actual
    • P(B);
    • Threat
      • S(C)
    • Vars
      • P(d);EP,S_CUTR(a),XP(B)::S(A),XR(b)
      • P(e);EP,S_CUTR(b),XP(B)::S(A),XR(a)


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).