MESON Chess Problem Database

Problem Display
PID: 261598 (8/8/8/4k3/7B/2K5/1QP5/7B w - - 0 1)

Graf, Philipp W

Neue Zurcher Zeitung, 1897

8/8/8/4k3/7B/2K5/1QP5/7B

#2

5 + 1

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qb4?
      • 1...Kf5
        • 2.Qe4#
      • 1...Ke6!
    • 1.Qb5+?
      • 1...Kf4
        • 2.Qg5#
      • 1...Ke6
        • 2.Qd5#
      • 1...Kd6!
  • Keys
    • 1.Qb7!
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6
        • 2.Qe7#
      • 1...Ke6
        • 2.Qd5#

FEATURES

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