MESON Chess Problem Database

Problem Display
PID: 219856 (5K1Q/8/5N2/4k3/1P2B3/8/8/4B3 w - - 0 1)

Riczu, Lajos

Land og Folk, 1974

5K1Q/8/5N2/4k3/1P2B3/8/8/4B3

#2

6 + 1

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qg7?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd6
        • 2.Qe7#
      • 1...Ke6
        • 2.Qe7#
      • 1...Kd4!
    • 1.Qg8?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd6
        • 2.Bg3#
      • 1...Kxf6
        • 2.Bc3#
      • 1...Kd4!
  • Keys
    • 1.Qh3!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd6
        • 2.Bg3#
      • 1...Kxf6
        • 2.Qf5#

Anticipated by 10692(1967)

This anticipates 95064(1984), 161761(1997), 165525(1998), 186833(2000), 153215(2011)

FEATURES

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