Problem Display
PID: 232358 (2Q5/8/8/8/2K5/8/2k5/7R w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1975

2Q5/8/8/8/2K5/8/2k5/7R

#2

3 + 1


5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Tries
    • 1.Qf5+?
      • 1...Kd2
        • 2.Qd3#
        • 2.Qf2#
      • 1...Kb2!
    • 1.Qc5?
      • threat
        • 2.Qf2#
      • 1...Kd2
        • 2.Qf2#
      • 1...Kb2!
    • 1.Qf8?
      • threat
        • 2.Qf2#
      • 1...Kd2
        • 2.Qf2#
      • 1...Kb2!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qg2#
        • 2.Qh2#
        • 2.Qc3#
      • 1...Kb2
        • 2.Qb3#
      • 1...Kd2
        • 2.Qd3#

Anticipated by 9307(1871)

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT::QAR1(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).