MESON Chess Problem Database

Problem Display
PID: 235328 (1Q5B/4pbP1/3pPk1p/3R1N1p/7b/3N2pP/6K1/5R2 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

7/8 HM., Deutsche Schachzeitung, 1980

1Q5B/4pbP1/3pPk1p/3R1N1p/7b/3N2pP/6K1/5R2

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Sxe7#
    • 1...Bxe6
      • 2.g8Q#
    • 1...Be8
      • 2.g8Q#
  • Tries
    • 1.Se3+?
      • 1...Kxe6
        • 2.Qc8#
      • 1...Kg6!
    • 1.Sxe7+?
      • 1...Kxe6
        • 2.Qxd6#
      • 1...Kxe7!
    • 1.g8B+?
      • 1...Kg5
        • 2.Sxe7#
      • 1...Kg6
        • 2.Sxh4#
      • 1...Kxe6!
  • Keys
    • 1.Qe8!
      • 1...Kg5
        • 2.Sxe7#
      • 1...Kxe6
        • 2.Rxd6#
      • 1...Kg6
        • 2.g8Q#
      • 1...Bxe6
        • 2.g8Q#
        • 2.g8R#
      • 1...Bxe8
        • 2.g8Q#
      • 1...Bg5
        • 2.Qxf7#
      • 1...Bg6
        • 2.Qxe7#
      • 1...Bg8
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::R(E)+S(F),XP(g)
    • B(h);XP(G)::P=Q
    • B(h);::P=Q
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(G)::QAB(I)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(F);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT,XP(G)::QAR1(I),XP(d)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • P(H);CHECK
      • Vars
        • K(e);S_FLIGHT::R(E)+S(F),XP(g)
        • K(e);P-FLIGHT::S(F),XB(b)
      • Refutation
        • K(e);P-FLIGHT,P_SPINB(h),XP(G)
  • Actual
    • Q(I);
    • Vars
      • K(e);S_FLIGHT::R(E)+S(F),XP(g)
      • K(e);OGATEB,P-FLIGHT,P_SPINP(g),XP(G)::R1(E),XP(d)
      • K(e);P-FLIGHT,P_SPINB(h)::P=Q
      • B(h);XP(G)::P=Q
      • B(h);XQ(I)::P=Q
      • B(b);SBLOCK::QAR1(I),XB(h)
      • B(h);SBLOCK::QAB1(I),XP(g)
      • B(h);::R(A)+S(F)
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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).