MESON Chess Problem Database

Problem Display
PID: 119977 (8/8/4p1K1/1PpkP1p1/2p3N1/n1n5/2P1N3/5Q2 w - - 0 1)

Larsen, Karl Adolf Koefoed

Sheffield Independent, 1918

8/8/4p1K1/1PpkP1p1/2p3N1/n1n5/2P1N3/5Q2

#2

7 + 7

49 Skakbladet 1918
4035 Aarsskrift for DSK 1935
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qg2#
      • 2.Qh1#
    • 1...Sb1
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sd1
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sa2
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sa4
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
    • 1...Sxb5
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
  • Tries
    • 1.Qd1+?
      • 1...Ke4
        • 2.Qh1#
      • 1...Sxd1!
  • Keys
    • 1.Qa1!
      • 1...Ke4
        • 2.Qh1#
      • 1...Sxc2
        • 2.Qa8#
      • 1...Saxb5
        • 2.Qa8#
      • 1...Sxe2
        • 2.Sf6#
      • 1...Scxb5
        • 2.Qh1#
      • 1...Sab1
        • 2.Qa8#
      • 1...Scb1
        • 2.Sf6#
      • 1...Sd1
        • 2.Sf6#
      • 1...Sa2
        • 2.Sf6#
        • 2.Qh1#
      • 1...Sa4
        • 2.Sf6#
        • 2.Qh1#
      • 1...Se4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(A)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(e);S_FLIGHT::QAB(A)
      • S(a);OGATE,XP(B)::QAB(A)
      • S(a);OGATE,XP(E)::QAB(A)
      • S(b);XS(C)::S(D)
      • S(b);N_GUARD,XP(E)::QAB(A)
      • S(a);OGATE::QAB(A)
      • S(b);::S(D)
      • S(b);SBLOCK::S(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).