MESON Chess Problem Database

Problem Display
PID: 31056 (8/6K1/4p1P1/4k3/1Q2P1p1/1n6/4N1N1/2n5 w - - 0 1)

Dubbe, Friedrich

Deutsches Wochenschach, 1898

8/6K1/4p1P1/4k3/1Q2P1p1/1n6/4N1N1/2n5

#2

6 + 5

3429 Friedrich Dubbe ein Deutscher Problemmeister 1938

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qd4#
    • 1...Sd2
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sa5
      • 2.Qd4#
    • 1...Sc5
      • 2.Qd4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sxg4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...g3
        • 2.Sg4#
      • 1...Sxe2!
    • 1.Sgf4?
      • 1...Sxe2
        • 2.Sd3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...Sa2
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...g3!
  • Keys
    • 1.Se1!
      • 1...Sxe2
        • 2.Sd3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...Sa2
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...g3
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB1(C)
    • S(b);N_GUARD::QAB1(C),XS(b)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B),XP(c)
      • Vars
        • S(b);N_GUARD::QAB1(C),XS(b)
        • S(b);N_GUARD::QAB1(C)
        • P(c);::S(B)
      • Refutation
        • S(a);XS(A)
    • Try
      • S(B);
      • Vars
        • S(a);N_GUARD,XS(A)::S(B)
        • S(b);N_GUARD::QAB1(C),XS(b)
        • S(b);N_GUARD::QAB1(C)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • P(c);
  • Actual
    • S(B);
    • Vars
      • S(a);N_GUARD,XS(A)::S(B)
      • S(b);N_GUARD::QAB1(C),XS(b)
      • S(b);N_GUARD::QAB1(C)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • P(c);N_GUARD::S(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).