MESON Chess Problem Database

Problem Display
PID: 86743 (8/3kB3/8/8/4K3/Q7/8/3B4 w - - 0 1)

Kirillov, Valery Afanasievich

Republika, 1990

8/3kB3/8/8/4K3/Q7/8/3B4

#2

4 + 1

5454 Near Snap 2009
6490 yacpdb 2009
3713 Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qd6+?
      • 1...Ke8
        • 2.Bh5#
      • 1...Kc8!
  • Keys
    • 1.Qa7+!
      • 1...Kc6
        • 2.Ba4#
      • 1...Ke6
        • 2.Bb3#
      • 1...Kc8
        • 2.Bg4#
      • 1...Ke8
        • 2.Bh5#

Anticipated by 116899(1962), 22924(1970)

This anticipates 163371(1994)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);S_FLIGHT::B(A)
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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).