MESON Chess Problem Database

Problem Display
PID: 224730 (4K3/8/1n5B/4k2P/1P1NP3/1P6/5N2/5Q2 w - - 0 1)

Decker, Adolfph L

Bruderschaft, 1887

4K3/8/1n5B/4k2P/1P1NP3/1P6/5N2/5Q2

#2

9 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa1#
    • 1...Kd6
      • 2.Bf4#
    • 1...Kf6
      • 2.Sd3#
      • 2.Sg4#
  • Tries
    • 1.Qb5+?
      • 1...Kxd4
        • 2.Qc5#
      • 1...Kd6
        • 2.Bf4#
        • 2.Qc5#
      • 1...Kf6
        • 2.Sg4#
        • 2.Qf5#
        • 2.Qg5#
        • 2.e5#
      • 1...Sd5!
  • Keys
    • 1.Qa6!
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kd6
        • 2.Bf4#
      • 1...Kf6
        • 2.Sg4#
      • 1...Sa4
        • 2.Sf3#
      • 1...Sc4
        • 2.Sf3#
      • 1...Sd5
        • 2.Sf3#
      • 1...Sd7
        • 2.Sf3#
      • 1...Sa8
        • 2.Sf3#
      • 1...Sc8
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XS(E)::QAB(A)
    • K(a);S_FLIGHT::B(H)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(E)::QAB1(A)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • Q(A);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(E)::QAB(A)
      • K(a);P_SPINS(b),S_FLIGHT::B(H)
      • K(a);P_SPINS(b),S_FLIGHT::S(B)
      • S(b);::S(E)
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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).