Problem Display
PID: 51550 (bRR2Q2/3p3B/rr5B/3P4/p2N4/5P2/Pk2K3/b1N5 w - - 0 1)

Barnes, Barry Peter

The Guardian, 1964

bRR2Q2/3p3B/rr5B/3P4/p2N4/5P2/Pk2K3/b1N5

#2

11 + 7


5454 Near Snap 2021

SOLUTION


  • SOUND
  • Sets
    • 1...Ra7
      • 2.Rxb6#
    • 1...Rb4
      • 2.Qxb4#
    • 1...Rb5
      • 2.Rxb5#
  • Keys
    • 1.Bg7!
      • threat
        • 2.Se6#
      • 1...Rb4
        • 2.Qxb4#
      • 1...Bc6
        • 2.Sdb3#
      • 1...d6
        • 2.Sb5#

Anticipated by 40828(1928)

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(d);N_GUARD::R(I),XR(e)
    • R(e);N_GUARD::QAR2(K),XR(e)
    • R(e);OGATE::R(I),XR(e)
  • Actual
    • B(G);
    • Threat
      • B(G)+S(E)
    • Vars
      • R(e);N_GUARD::QAR2(K),XR(e)
      • B(g);::B(G)+S(E)
      • P(f);::B(G)+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).