MESON Chess Problem Database

Problem Display
PID: 227736 (8/3p2R1/4k2p/7P/3Q2K1/8/8/8 w - - 0 1)

Dittkowski, O

Essener Anzeiger, 1926

8/3p2R1/4k2p/7P/3Q2K1/8/8/8

#2

4 + 3

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4+?
      • 1...Kf6
        • 2.Qe7#
      • 1...Kd6!
    • 1.Qd5+?
      • 1...Kf6
        • 2.Rf7#
      • 1...Kxd5!
    • 1.Qxd7+?
      • 1...Kf6
        • 2.Qe7#
      • 1...Ke5!
  • Keys
    • 1.Qc5!
      • 1...Kf6
        • 2.Qe7#
      • 1...d5
        • 2.Qe7#
      • 1...d6
        • 2.Qf5#

This anticipates 176160(1954)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • P(c);SBLOCK::QAR1(A)
      • P(c);SBLOCK::QAB1(A)
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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).