MESON Chess Problem Database

Problem Display
PID: 227748 (Q4N1k/4P2P/4P2b/6p1/6K1/8/8/8 w - - 0 1)

von Gottschall, Hermann

Reichspost, 1926

Q4N1k/4P2P/4P2b/6p1/6K1/8/8/8

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kg7
      • 2.Qa1#
  • Tries
    • 1.Qe4?
      • 1...Kg7
        • 2.Qd4#
        • 2.Qe5#
      • 1...Bxf8
        • 2.exf8Q#
      • 1...Bg7!
    • 1.Qb7?
      • 1...Kg7
        • 2.Qb2#
      • 1...Bxf8
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Bg7!
    • 1.Qa7?
      • 1...Kg7
        • 2.Qd4#
        • 2.Qa1#
      • 1...Bxf8
        • 2.exf8Q#
        • 2.exf8R#
      • 1...Bg7!
  • Keys
    • 1.Qh1!
      • 1...Kg7
        • 2.Qa1#
      • 1...Bxf8
        • 2.exf8Q#
      • 1...Bg7
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(E)
  • Tries
    • Try
      • Q(E);
      • Vars
        • B(b);OGATE,XS(F)::PXB(b)=Q
      • Refutation
        • B(b);
    • Try
      • Q(E);
      • Vars
        • K(c);S_FLIGHT::QAB(E)
        • B(b);OGATE,XS(F)::PXB(b)=Q
      • Refutation
        • B(b);
    • Try
      • Q(E);
      • Vars
        • B(b);OGATE,XS(F)::PXB(b)=Q
      • Refutation
        • B(b);
  • Actual
    • Q(E);
    • Vars
      • K(c);S_FLIGHT::QAB(E)
      • B(b);OGATE,XS(F)::PXB(b)=Q
      • B(b);SBLOCK::S(F)
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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).