Problem Display
PID: 166406 (5R2/8/4pp2/2K1k3/4pp1P/2P1P3/2Q3R1/8 w - - 0 1)

Gatti, Daniele

Best Problems, 2017

5R2/8/4pp2/2K1k3/4pp1P/2P1P3/2Q3R1/8

#2

7 + 5


SOLUTION


  • SOUND
  • Sets
    • 1...Kf5
      • 2.Rg5#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qxf4#
      • 1...Kf5
        • 2.Rg5#
        • 2.Qxf4#
      • 1...fxe3
        • 2.Qxf6#
      • 1...f3!
  • Keys
    • 1.Rg4!
      • 1...Kf5
        • 2.Rg5#
      • 1...fxe3
        • 2.Qxe4#
      • 1...f3
        • 2.Qxe4#
      • 1...f5
        • 2.exf4#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINP(a)::R1(B)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • P(b);OGATE,XP(D)::QAB1(A),XP(e)
      • Refutation
        • P(b);
  • Actual
    • R(B);
    • Vars
      • K(c);P-FLIGHT,P_SPINP(a)::R1(B)
      • P(b);XP(D)::QAR1(A),XP(a)
      • P(b);::QAR1(A),XP(a)
      • P(e);::P(D),XP(b)


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).