Problem Display
PID: 241417 (8/1P4pp/3P1kPP/2K4R/3p2PN/1RP4B/QB6/8 w - - 0 1)

Hjelle, David

Arbejder-Skak, 1950

8/1P4pp/3P1kPP/2K4R/3p2PN/1RP4B/QB6/8

#2

13 + 4


15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Tries
    • 1.Ra3?
      • threat
        • 2.Rf5#
        • 2.Qf7#
      • 1...gxh6
        • 2.Qf7#
      • 1...hxg6!
    • 1.Rb4?
      • threat
        • 2.Rf5#
        • 2.Qf7#
      • 1...gxh6
        • 2.Qf7#
      • 1...hxg6!
    • 1.Rb5?
      • threat
        • 2.Rf5#
        • 2.Qf7#
      • 1...gxh6
        • 2.Qf7#
      • 1...hxg6!
    • 1.Rb6?
      • threat
        • 2.Rf5#
        • 2.Qf7#
      • 1...gxh6
        • 2.Qf7#
      • 1...hxg6!
  • Keys
    • 1.cxd4!
      • threat
        • 2.Rf3#
        • 2.d5#
        • 2.g5#
      • 1...Ke6
        • 2.g5#
      • 1...gxh6
        • 2.d5#
      • 1...hxg6
        • 2.Rf3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XP(L)::QAR1(A)
      • Refutation
        • P(d);XP(K)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XP(L)::QAR1(A)
      • Refutation
        • P(d);XP(K)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XP(L)::QAR1(A)
      • Refutation
        • P(d);XP(K)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XP(L)::QAR1(A)
      • Refutation
        • P(d);XP(K)
  • Actual
    • P(D);XP(a)
    • Threat
      • DUALS(3)
    • Vars
      • K(b);P-FLIGHT::B(E)+P(F)
      • P(c);XP(L)::B(B)+P(D)
      • P(d);XP(K)::R(C)


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).