Problem Display
PID: 150235 (R3b3/3PNkn1/4R1NP/7p/Kp6/p1r1n2Q/8/B7 w - - 0 1)

Picton, PH

The Referee, 1925

(First published on Sun Feb 22 1925)

R3b3/3PNkn1/4R1NP/7p/Kp6/p1r1n2Q/8/B7

#2

9 + 8


15239 Valois Notebooks 2014

SOLUTION


  • SOUND
  • Sets
    • 1...Rc1
      • 2.Rf6#
    • 1...Rc2
      • 2.Rf6#
    • 1...Rb3
      • 2.Rf6#
    • 1...Rd3
      • 2.Rf6#
    • 1...Rc4
      • 2.Rf6#
    • 1...Rc5
      • 2.Rf6#
    • 1...Rc6
      • 2.d8S#
    • 1...Rc7
      • 2.Rf6#
    • 1...Rc8
      • 2.Rf6#
  • Keys
    • 1.Rc6!
      • threat
        • 2.d8S#
      • 1...Bxd7
        • 2.Rf8#
      • 1...Se6
        • 2.Qxe6#
      • 1...Rd3
        • 2.Rf6#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(b);::R1(D)
    • R(b);N_PINP(G)::P=S
  • Actual
    • R(D);N_SPINP(G)
    • Threat
      • P=S
    • Vars
      • B(h);OGATE,P_PINR(D),XP(G)::R1(I)
      • S(g);N_GUARD::QAB1(B),XS(g)
      • R(b);::R1(D)


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).