MESON Chess Problem Database

Problem Display
PID: 231209 (8/3N4/P7/3k4/6P1/1N3p2/2K2Q2/8 w - - 0 1)

Lohk, Hans Erik

Postimees, 1927

8/3N4/P7/3k4/6P1/1N3p2/2K2Q2/8

#2

6 + 2

6490 yacpdb 2021
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qc5#
    • 1...Ke4
      • 2.Qd4#
  • Tries
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Ke6!
    • 1.Qb6?
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qd4#
      • 1...f2!
  • Keys
    • 1.Sf8!
      • 1...Kc4
        • 2.Qc5#
      • 1...Ke4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc6
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#

Anticipated by 203243(1924)

This anticipates 77557(1952), 213411(1972)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • P(a);
  • Actual
    • S(F);
    • Vars
      • K(b);S_FLIGHT::QAR1(B)
      • K(b);P-FLIGHT::QAB1(B)
HTML5 logo

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).