MESON Chess Problem Database

Problem Display
PID: 249569 (2N5/2P5/1Bk5/5K2/8/3P4/R7/Q7 w - - 0 1)

Gallischeck, Otto

Deutsche Schachzeitung, 1963

2N5/2P5/1Bk5/5K2/8/3P4/R7/Q7

#2

7 + 1

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qh1#
  • Tries
    • 1.Ra7?
      • 1...Kb5
        • 2.Qa4#
      • 1...Kd5
        • 2.Qh1#
      • 1...Kd7!
    • 1.Qd4?
      • 1...Kb5
        • 2.Sa7#
        • 2.Qc5#
        • 2.Qa4#
        • 2.Qc4#
      • 1...Kb7!
    • 1.Qe5?
      • 1...Kd7
        • 2.Qe6#
      • 1...Kb7!
  • Keys
    • 1.Ra8!
      • 1...Kb5
        • 2.Qa4#
      • 1...Kd5
        • 2.Qh1#
      • 1...Kb7
        • 2.Qh1#
      • 1...Kd7
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAB(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).