MESON Chess Problem Database

Problem Display
PID: 255905 (8/8/2N5/1k5K/N5BQ/8/P7/8 w - - 0 1)

Mironenko, Nikolai Ivanovich

3rd Prize, Buletin Problemistic, 1984

8/8/2N5/1k5K/N5BQ/8/P7/8

#2

6 + 1

15601 Albrecht-Leiss-Degener Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qg5+?
      • 1...Kxa4
        • 2.Qa5#
      • 1...Kc4
        • 2.Be2#
      • 1...Ka6
        • 2.Bc8#
      • 1...Kxc6!
    • 1.Qe7?
      • 1...Kxa4
        • 2.Qb4#
      • 1...Ka6
        • 2.Be2#
      • 1...Kxc6
        • 2.Qd7#
      • 1...Kc4!
  • Keys
    • 1.Qd8!
      • 1...Kxa4
        • 2.Qa5#
      • 1...Kc4
        • 2.Be2#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qd7#

This anticipates 260862(2009)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAR1(D)
        • K(a);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
    • Try
      • Q(D);
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(B)::QAR1(D)
        • K(a);N_GUARD,S_FLIGHT::B(C)
        • K(a);OGATEB,S_FLIGHT,XS(F)::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);N_GUARD,S_FLIGHT,XS(B)::QAR1(D)
      • K(a);N_GUARD,S_FLIGHT::B(C)
      • K(a);N_GUARD,S_FLIGHT::QAR1(D)
      • K(a);OGATEB,S_FLIGHT,XS(F)::QAB1(D)
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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).