Problem Display
PID: 211346 (8/8/5N2/5k2/7K/2B5/8/Q7 w - - 0 1)

Inostroza, Sergio

The Problemist, 1986

8/8/5N2/5k2/7K/2B5/8/Q7

#2

4 + 1


5454 Near Snap 2021
  • SOUND
  • Tries
    • 1.Qb1+?
      • 1...Kf4
        • 2.Qe4#
      • 1...Ke6!
    • 1.Qe1?
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qf2#
        • 2.Qe4#
      • 1...Kg6!
    • 1.Qg1?
      • threat
        • 2.Qg4#
      • 1...Kf4
        • 2.Qf2#
      • 1...Ke6!
    • 1.Qa2?
      • 1...Kf4
        • 2.Qf2#
      • 1...Kg6!
    • 1.Qa4?
      • threat
        • 2.Qe4#
        • 2.Qg4#
      • 1...Ke6
        • 2.Qd7#
      • 1...Kg6!
  • Keys
    • 1.Qa7!
      • 1...Kf4
        • 2.Qf2#
      • 1...Ke6
        • 2.Qd7#
      • 1...Kg6
        • 2.Qh7#

Anticipated by 4506(1873), 32680(1873), 24321(1885), 109336(1920), 22076(1924), 76425(1929), 46372(1941), 18804(1958), 133136(1983)

This anticipates 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).