MESON Chess Problem Database

Problem Display
PID: 6287 (2B5/b1p3BQ/3p2Pp/rn1N3K/2P1kPN1/3p2p1/3pn1P1/3b1R2 w - - 0 1)

Larsen, Karl Adolf Koefoed

2nd HM., L'Echiquier, 1928

2B5/b1p3BQ/3p2Pp/rn1N3K/2P1kPN1/3p2p1/3pn1P1/3b1R2

#2

11 + 12

4035 Aarsskrift for DSK 1934
2048 Tuxens skakopgaver (Leif C Schmidt) 1984
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sed4
      • 2.Sf6#
    • 1...Sxf4+
      • 2.Rxf4#
    • 1...Sbd4
      • 2.Sf6#
  • Tries
    • 1.Be5?
      • threat
        • 2.Sgf6#
        • 2.Sdf6#
        • 2.g7#
      • 1...Sxf4+
        • 2.Rxf4#
      • 1...Sc1
        • 2.Sf6#
        • 2.g7#
      • 1...Sg1
        • 2.Sf6#
        • 2.g7#
      • 1...Sec3
        • 2.Sf6#
        • 2.g7#
      • 1...Sed4
        • 2.Sf6#
      • 1...Sbd4
        • 2.Sgf6#
        • 2.Sdf6#
      • 1...dxe5!
    • 1.Qg8?
      • threat
        • 2.Qe6#
        • 2.Qe8#
      • 1...Sxf4+
        • 2.Rxf4#
      • 1...Sed4
        • 2.Sf6#
      • 1...Sbd4
        • 2.Sf6#
      • 1...Bd4!
    • 1.Qh8?
      • threat
        • 2.Qe8#
      • 1...Sxf4+
        • 2.Rxf4#
      • 1...Sed4
        • 2.Sf6#
      • 1...Sbd4
        • 2.Sf6#
      • 1...Bd4!
  • Keys
    • 1.Bh8!
      • threat
        • 2.Qe7#
      • 1...Sxf4+
        • 2.Rxf4#
      • 1...Bd4
        • 2.g7#
      • 1...Sed4
        • 2.Sf6#
      • 1...Sbd4
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);P_PINS(E),SBLOCK::S(F)
    • S(c);CHECK,OGATE,P_PINS(E),XP(D)::R1(A),XS(c)
    • S(h);P_PINS(F),SBLOCK::S(E)
  • Tries
    • Try
      • B(I);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);CHECK,OGATE,P_PINS(E),XP(D)::R1(A),XS(c)
        • S(c);P_PINS(E)::S(F)
      • Refutation
        • P(i);XB(I)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);CHECK,OGATE,P_PINS(E),XP(D)::R1(A),XS(c)
        • S(c);P_PINS(E),SBLOCK::S(F)
        • S(h);P_PINS(F),SBLOCK::S(E)
      • Refutation
        • B(k);
    • Try
      • Q(J);
      • Threat
        • QAR(J)
      • Vars
        • S(c);CHECK,OGATE,P_PINS(E),XP(D)::R1(A),XS(c)
        • S(c);P_PINS(E),SBLOCK::S(F)
        • S(h);P_PINS(F),SBLOCK::S(E)
      • Refutation
        • B(k);
  • Actual
    • B(I);
    • Threat
      • QAR(J)
    • Vars
      • S(c);CHECK,OGATE,P_PINS(E),XP(D)::R1(A),XS(c)
      • B(k);SBLOCK::QAB(J)+P(H)
      • S(c);P_PINS(E),SBLOCK::S(F)
      • S(h);P_PINS(F),SBLOCK::S(E)
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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).