MESON Chess Problem Database

Problem Display
PID: 233904 (8/1B6/8/1nKn4/1p6/1QBk4/8/b3R1N1 w - - 0 1)

Hannemann, Knud Harald

Skakbladet, 1929

8/1B6/8/1nKn4/1p6/1QBk4/8/b3R1N1

#2

6 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Be4#
    • 1...Sb6
      • 2.Be4#
    • 1...Sc7
      • 2.Be4#
    • 1...Se7
      • 2.Be4#
    • 1...bxc3
      • 2.Qd1#
  • Tries
    • 1.Re2?
      • threat
        • 2.Qc2#
        • 2.Qc4#
      • 1...Sd4
        • 2.Qc4#
      • 1...Sd6
        • 2.Qc2#
      • 1...Se3
        • 2.Rd2#
      • 1...Sb6
        • 2.Be4#
        • 2.Qc2#
      • 1...Sa3!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Se5#
      • 1...Bxc3
        • 2.Qb1#
      • 1...Sbxc3
        • 2.Ba6#
      • 1...Sdxc3
        • 2.Be4#
      • 1...bxc3
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(e);OGATE::B(F)
    • P(c);P_SPINP(c),SBLOCK,XB(D)::QAR2(C)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::QAB1(C)
        • S(e);SBLOCK::R1(A)
      • Refutation
        • S(d);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • B(a);P_SPINB(a),SBLOCK,XB(D)::QAB(C)
      • S(d);OGATEB,P_SPINS(d),XB(D)::B(F)
      • S(e);OGATE,P_SPINS(e),XB(D)::B(F)
      • P(c);P_SPINP(c),SBLOCK,XB(D)::QAR2(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).