Problem Display
PID: 166514 (5R2/1p5K/4p1pN/6kp/rr5n/BRb3nB/3p4/6Q1 w - - 0 1)

Barnes, Barry Peter

Schach-Echo, 1975

5R2/1p5K/4p1pN/6kp/rr5n/BRb3nB/3p4/6Q1

#2

7 + 11


56 The Problemist 2017

SOLUTION


  • SOUND
  • Sets
    • 1...Rd4
      • 2.Be7#
    • 1...Bd4
      • 2.Rxg3#
      • 2.Qxg3#
  • Keys
    • 1.Qd4!
      • threat
        • 2.Sf7#
      • 1...Rxd4
        • 2.Be7#
      • 1...Bxd4
        • 2.Rxg3#
      • 1...Se4
        • 2.Qe3#
      • 1...e5
        • 2.Qd8#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATE::B(B)
  • Actual
    • Q(A);N_PINS(c)
    • Threat
      • S(E)
    • Vars
      • R(e);OGATE,XQ(A)::B(B)
      • B(b);OGATE,XQ(A)::R(C),XS(c)
      • S(c);S_CUTR(e)::QAB(A)
      • P(i);S_CUTB(b)::QAB(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).