MESON Chess Problem Database

Problem Display
PID: 107962 (8/5B2/5n2/8/4kB2/3N4/8/1Q5K w - - 0 1)

Decker, Adolfph L

Checkmate, 1904

8/5B2/5n2/8/4kB2/3N4/8/1Q5K

#2

5 + 2

6490 yacpdb 2009
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Se1+?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kxf4!
    • 1.Se5+?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kxf4!
    • 1.Qb3?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf5
        • 2.Qe6#
      • 1...Sg4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sh5
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sh7
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#
      • 1...Sg8
        • 2.Qd5#
      • 1...Kf3!
    • 1.Qb5?
      • 1...Kd4
        • 2.Qc4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sg4
        • 2.Qd5#
      • 1...Sh5
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sh7
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#
      • 1...Sg8
        • 2.Qd5#
      • 1...Kf3!
  • Keys
    • 1.Qa2!
      • 1...Kxd3
        • 2.Qc4#
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf5
        • 2.Qe6#
      • 1...Sg4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sh5
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sh7
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#
      • 1...Sg8
        • 2.Qd5#

This anticipates 108610(1904), 149412(1918), 15501(1984)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAB1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR1(A)
      • S(b);N_GUARD::QAB1(A)
      • S(b);N_GUARD::QAB1(A),XS(b)
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).