MESON Chess Problem Database

Problem Display
PID: 201623 (5n2/1K4B1/Q7/7p/4k3/8/8/3B4 w - - 0 1)

Dischler, Max

Deutsche Allgemeine Zeitung, 1922

5n2/1K4B1/Q7/7p/4k3/8/8/3B4

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc6#
  • Tries
    • 1.Qc4+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Kf5!
    • 1.Qa4+?
      • 1...Kd3
        • 2.Qd4#
      • 1...Ke3
        • 2.Qd4#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5!
    • 1.Qe6+?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kf4
        • 2.Qe5#
      • 1...Sxe6!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qf3#
      • 1...Kd3
        • 2.Qd4#
      • 1...Ke3
        • 2.Qd4#
      • 1...Kd5
        • 2.Qc6#

FEATURES

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