MESON Chess Problem Database

Problem Display
PID: 203249 (3N4/3p4/8/4k3/1P3N2/3K4/8/2Q5 w - - 0 1)

Berhausen, Fritz

Chess Amateur (The), 1924

3N4/3p4/8/4k3/1P3N2/3K4/8/2Q5

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc5#
  • Tries
    • 1.Sh5?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...d5
        • 2.Qf4#
      • 1...d6
        • 2.Qg5#
      • 1...Kf5!
    • 1.Sfe6?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qg5#
      • 1...d5
        • 2.Qf4#
      • 1...d6
        • 2.Qg5#
      • 1...dxe6!
  • Keys
    • 1.Sh3!
      • 1...Kd5
        • 2.Qc5#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qg5#
      • 1...d5
        • 2.Qf4#
      • 1...d6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAB1(A)
        • P(b);SBLOCK::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAB1(A)
        • P(b);SBLOCK::QAR2(A)
      • Refutation
        • P(b);XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAB1(A)
      • P(b);SBLOCK::QAR2(A)
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).