Problem Display
PID: 183428 (1q6/4R1p1/5p2/Qn2bk1P/7R/2Nr1N1K/1B4P1/1B2n3 w - - 0 1)

Kipping, Cyril Stanley

The Problemist, 1943

1q6/4R1p1/5p2/Qn2bk1P/7R/2Nr1N1K/1B4P1/1B2n3

#2

10 + 8


SOLUTION


  • SOUND
  • Sets
    • 1...Bf4
      • 2.g4#
    • 1...Sxg2
      • 2.Bxd3#
  • Tries
    • 1.Rf4+?
      • 1...Bxf4
        • 2.g4#
      • 1...Kxf4!
  • Keys
    • 1.Bc1!
      • threat
        • 2.g4#
      • 1...Sxg2
        • 2.Bxd3#
      • 1...Sxc3
        • 2.Rf4#
      • 1...Bg3
        • 2.Sd4#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(d);P_SPINS(c),SBLOCK::P(C)
    • S(a);N_GUARD,XP(C)::B(A),XR(b)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • B(d);P_SPINS(c),SBLOCK,XR(G)::P(C)
      • Refutation
        • K(e);N_SPINR(b),P-FLIGHT,XR(G)
  • Actual
    • B(B);
    • Threat
      • P(C)
    • Vars
      • S(a);N_GUARD,XP(C)::B(A),XR(b)
      • S(c);P_SPINB(d),XS(D)::R1(G)
      • B(d);N_PINS(E),P_SPINS(c)::S(E)


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).