MESON Chess Problem Database

Problem Display
PID: 269598 (Q7/3k1N2/3P2K1/8/P7/8/8/8 w - - 0 1)

Chernikh, Vassily

64 Shakhmatnoe obozrenie, 2023

Q7/3k1N2/3P2K1/8/P7/8/8/8

#2

5 + 1

5454 Near Snap 2023
3713 Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Qb7+?
      • 1...Ke8
        • 2.Qc8#
        • 2.Qe7#
      • 1...Ke6!
    • 1.Qa6?
      • 1...Ke8
        • 2.Qc8#
      • 1...Ke6!
    • 1.Qb8?
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6!
  • Keys
    • 1.Qa5!
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kc8
        • 2.Qc7#
      • 1...Ke8
        • 2.Qd8#

Anticipated by 47022(1955), 252865(2005)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • K(a);N_GUARD,S_FLIGHT::QAR1(E)
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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).