Problem Display
PID: 133136 (6B1/8/8/8/8/1Nk5/8/3K3Q w - - 0 1)

Boyer, Jean-Pierre

di Scala, Pascal

Vitatop, 1983

6B1/8/8/8/8/1Nk5/8/3K3Q

#2

4 + 1


5454 Near Snap 2009
3713 Snap 2009
  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qf3#
  • Tries
    • 1.Kc1?
      • 1...Kd3
        • 2.Qf3#
      • 1...Kb4!
    • 1.Qg2?
      • threat
        • 2.Qd2#
      • 1...Kd3
        • 2.Qf3#
      • 1...Kb4!
    • 1.Qd5?
      • threat
        • 2.Qd2#
        • 2.Qd4#
      • 1...Kb4
        • 2.Qa5#
      • 1...Kb2!
    • 1.Qb7?
      • 1...Kd3
        • 2.Qf3#
      • 1...Kb2!
    • 1.Qh4?
      • threat
        • 2.Qd4#
      • 1...Kd3
        • 2.Qd4#
      • 1...Kb2!
    • 1.Qh5?
      • 1...Kd3
        • 2.Qf3#
      • 1...Kb4
        • 2.Qa5#
      • 1...Kb2!
    • 1.Qh8+?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kb4!
  • Keys
    • 1.Qa8!
      • 1...Kb2
        • 2.Qa1#
      • 1...Kd3
        • 2.Qf3#
      • 1...Kb4
        • 2.Qa5#

Anticipated by 4506(1873), 32680(1873), 214539(1878), 218611(1882), 218488(1882), 24321(1885), 22076(1924), 46372(1941), 18804(1958), 218807(1976)

This anticipates 211346(1986), 184446(2000), 47757(2003), 67253(2006), 235007(2019)



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).