MESON Chess Problem Database

Problem Display
PID: 224645 (8/1B2B3/Nn6/1k4K1/p5Q1/p7/n7/8 w - - 0 1)

Decker, Adolfph L

Deutsche Schachzeitung, 1887

8/1B2B3/Nn6/1k4K1/p5Q1/p7/n7/8

#2

5 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qb4#
    • 1...Sc3
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qc5#
      • 1...Ka5
        • 2.Qc5#
      • 1...Sd7!
  • Keys
    • 1.Bd8!
      • 1...Ka5
        • 2.Qf5#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sc4
        • 2.Qd7#
      • 1...Sd5
        • 2.Qe2#
      • 1...Sd7
        • 2.Qe2#
      • 1...Sa8
        • 2.Qe2#
      • 1...Sc8
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • S(e);
  • Actual
    • B(E);
    • Vars
      • K(d);P-FLIGHT,P_SPINS(e)::QAR(A)
      • S(a);N_GUARD::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(e);N_GUARD,SBLOCK::QAB(A)
      • S(e);N_GUARD::QAB(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).