MESON Chess Problem Database

Problem Display
PID: 88724 (B7/2N4r/2Rn2R1/q1n4p/pr4P1/5kB1/3P1N2/2bK2Qb w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Problemisten, 1949

B7/2N4r/2Rn2R1/q1n4p/pr4P1/5kB1/3P1N2/2bK2Qb

#2

10 + 10

259 Thema Danicum 1992
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Rc3#
    • 1...Sce4
      • 2.Rc3#
    • 1...Sa6
      • 2.Rc3#
    • 1...Se6
      • 2.Rc3#
    • 1...Scb7
      • 2.Rc3#
    • 1...Sd7
      • 2.Rc3#
    • 1...Sc4
      • 2.Rcf6#
      • 2.Rgf6#
    • 1...Sde4
      • 2.Rcf6#
    • 1...Sb5
      • 2.Rcf6#
    • 1...Sf7
      • 2.Rcf6#
    • 1...Sc8
      • 2.Rcf6#
    • 1...Se8
      • 2.Rcf6#
  • Tries
    • 1.Rcxd6+?
      • 1...Re4
        • 2.Rdf6#
        • 2.Rgf6#
      • 1...Rb7
        • 2.Rdf6#
        • 2.Rgf6#
      • 1...Se4
        • 2.Rd3#
      • 1...Sb7
        • 2.Rd3#
      • 1...Qxa8!
    • 1.Rf6+?
      • 1...Rf4
        • 2.Rxf4#
      • 1...Sf5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxh1#
      • 1...Kxe4
        • 2.Qe3#
      • 1...Rxe4
        • 2.Qf2#
      • 1...Bxd2
        • 2.Sxd2#
      • 1...Scxe4
        • 2.Rc3#
      • 1...Sdxe4
        • 2.Rcf6#
      • 1...hxg4
        • 2.Sg5#
      • 1...Bg2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • S(g);OGATE::B(J)+R(G),DCHECK
    • S(g);OGATE::R(G)
    • S(i);OGATE::R(G)
    • S(i);OGATE::B(J)+R(G),DCHECK
  • Tries
    • Try
      • R(G);CHECK,XS(i)
      • Vars
        • S(g);P_SPINS(g)::R(G)
      • Refutation
        • Q(f);XB(J)
    • Try
      • R(H);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::R1(H),XR(e)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • S(D);
    • Threat
      • QAB(B),XB(b)
    • Vars
      • K(c);S_FLIGHT,XS(D)::QAR1(B)
      • R(e);SBLOCK,XS(D)::QAR1(B)
      • B(a);XP(C)::S(D),XB(a)
      • S(g);OGATE,XS(D)::R(G)
      • S(i);OGATE,XS(D)::R(G)
      • P(h);SBLOCK,XP(F)::S(D)
      • B(b);SBLOCK::QAR1(B)
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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).