MESON Chess Problem Database

Problem Display
PID: 176191 (8/8/Q5K1/3k4/4N3/8/2N5/8 w - - 0 1)

Winterer, Max

Schach-Echo, 1969

8/8/Q5K1/3k4/4N3/8/2N5/8

#2

4 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3+?
      • 1...Ke5
        • 2.Qf6#
      • 1...Kc5!
    • 1.Qb5+?
      • 1...Kxe4
        • 2.Qf5#
      • 1...Ke6!
    • 1.Qf6?
      • 1...Kxe4
        • 2.Qf5#
      • 1...Kc4!
  • Keys
    • 1.Qc8!
      • 1...Kxe4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#

Anticipated by 22074(1924)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT,XS(B)::QAB1(C)
      • K(a);P-FLIGHT::QAR1(C)
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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).