MESON Chess Problem Database

Problem Display
PID: 11858 (8/4Q3/4P3/4k3/8/2NB3K/4P3/8 w - - 0 1)

Lokker, Miklosh S

Shakhmaty v SSSR, 1972

8/4Q3/4P3/4k3/8/2NB3K/4P3/8

#2

6 + 1

56 The Problemist 2006
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Kh4?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kd4!
    • 1.Sd1?
      • 1...Kd4
        • 2.Qd6#
      • 1...Kf4
        • 2.Qf6#
      • 1...Kd5!
    • 1.Sb5?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf4!
  • Keys
    • 1.Se4!
      • 1...Kd4
        • 2.Qc5#
      • 1...Kf4
        • 2.Qg5#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf5
        • 2.Qf6#

Anticipated by 43065(1969)

This anticipates 103735(1987), 237410(1988), 110127(1999)

This is a version of 11855

Version by Michael Lipton.

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);P-FLIGHT::QAR1(F)
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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).