MESON Chess Problem Database

Problem Display
PID: 120138 (2b5/2Qn4/k7/N1b5/P7/8/8/3K4 w - - 0 1)

Decker, Adolfph L

Akademische Schachblatter, 1903

2b5/2Qn4/k7/N1b5/P7/8/8/3K4

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb7+?
      • 1...Kxa5
        • 2.Qb5#
      • 1...Bxb7!
  • Keys
    • 1.Sc6!
      • 1...Bg1
        • 2.Sb4#
      • 1...Bf2
        • 2.Sb4#
      • 1...Ba3
        • 2.Qa7#
      • 1...Be3
        • 2.Sb4#
      • 1...Bb4
        • 2.Sxb4#
        • 2.Qa7#
      • 1...Bd4
        • 2.Sb4#
      • 1...Bb6
        • 2.Qxc8#
      • 1...Bd6
        • 2.Qa7#
      • 1...Ba7
        • 2.Sb4#
        • 2.Qxa7#
      • 1...Be7
        • 2.Qa7#
      • 1...Bf8
        • 2.Qa7#
      • 1...Bb7
        • 2.Qa5#
      • 1...Se5
        • 2.Sb8#
      • 1...Sb6
        • 2.Qa7#
      • 1...Sf6
        • 2.Sb8#
      • 1...Sb8
        • 2.Sxb8#
      • 1...Sf8
        • 2.Sb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • B(d);XQ(D)
  • Actual
    • S(C);
    • Vars
      • B(a);N_GUARD::S(C)
      • B(a);N_GUARD::QAR1(D)
      • B(a);SBLOCK::QAB(D),XB(d)
      • B(d);SBLOCK::QAR1(D)
      • S(c);N_GUARD::S(C)
      • S(c);S_CUTB(a)::QAR1(D)
      • S(c);N_GUARD::S(C),XS(c)
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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).