MESON Chess Problem Database

Problem Display
PID: 240659 (2b4b/NrrP4/2pQ2N1/1pnq4/p2k4/1p3P2/3PP3/2R3K1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1984

2b4b/NrrP4/2pQ2N1/1pnq4/p2k4/1p3P2/3PP3/2R3K1

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.Sxc6#
    • 1...Sd3
      • 2.e3#
  • Tries
    • 1.Qf4+?
      • 1...Se4
        • 2.Qe3#
      • 1...Qe4!
  • Keys
    • 1.d8Q!
      • threat
        • 2.Qxc5#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Rd7
        • 2.Sxc6#
      • 1...Bd7
        • 2.Qxh8#
      • 1...Sd3
        • 2.e3#
      • 1...Se4
        • 2.Qb4#
      • 1...Sa6
        • 2.Qf4#
      • 1...Se6
        • 2.Qb4#
      • 1...Sd7
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(i);N_GUARD,XP(I)::S(H),XP(g)
    • S(e);SBLOCK::P(D)
  • Tries
    • Try
      • Q(F);CHECK,N_PINQ(f)
      • Vars
        • S(e);P_SPINS(e)::QAB1(F)
      • Refutation
        • Q(f);P_SPINQ(f)
  • Actual
    • P(I);
    • Threat
      • QAB1(F),XS(e)
    • Vars
      • Q(f);OGATE,XQ(F)::QAR2(I),XQ(f)
      • R(i);N_GUARD::S(H),XP(g)
      • B(j);S_CUTR(i)::QAB(I),XB(k)
      • S(e);SBLOCK::P(D)
      • S(e);OGATE::QAR2(F)
      • S(e);N_GUARD::QAR2(F)
      • S(e);N_GUARD,S_CUTB(j)::QAR(I)
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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).