MESON Chess Problem Database

Problem Display
PID: 24883 (8/8/8/4Q3/3N2pk/7P/8/7K w - - 0 1)

Dubbe, Friedrich

Wismarer Sontagsbote, 1887

8/8/8/4Q3/3N2pk/7P/8/7K

#2

4 + 2

3757 Schachminiaturen I 1902
2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh3
      • 2.Qh2#
  • Tries
    • 1.Kg2?
      • 1...g3
        • 2.Sf3#
      • 1...gxh3+!
    • 1.Sf3+?
      • 1...Kxh3
        • 2.Qh2#
      • 1...gxf3!
    • 1.Qf4?
      • threat
        • 2.Qxg4#
      • 1...Kxh3
        • 2.Qh2#
      • 1...Kh5!
  • Keys
    • 1.Se6!
      • 1...Kxh3
        • 2.Qh2#
      • 1...gxh3
        • 2.Qg5#
      • 1...g3
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(B)::QAR1(D)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(a);N_GUARD::S(C)
      • Refutation
        • P(a);CHECK,XP(B)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(B)::QAR1(D)
      • Refutation
        • P(a);XS(C)
    • Try
      • Q(D);P_PINP(a)
      • Threat
        • QAR1(D),XP(a)
      • Vars
        • K(b);N_SPINP(a),OGATEB,P-FLIGHT,XP(B)::QAR1(D)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(B)::QAR1(D)
      • P(a);SBLOCK,XP(B)::QAB1(D)
      • P(a);SBLOCK::QAR(D)
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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).