MESON Chess Problem Database

Problem Display
PID: 233962 (b4b2/5Rq1/5Pp1/3n2p1/B5R1/Q1P2k1P/K1p2p1P/2N2Nn1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Skakbladet, 1985

b4b2/5Rq1/5Pp1/3n2p1/B5R1/Q1P2k1P/K1p2p1P/2N2Nn1

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc3+
      • 2.Qxc3#
    • 1...Se3
      • 2.Sd2#
    • 1...Sb4+
      • 2.cxb4#
    • 1...Sb6
      • 2.fxg7#
    • 1...Sc7
      • 2.fxg7#
    • 1...Se7
      • 2.c4#
  • Tries
    • 1.c4+?
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Se3
        • 2.Sd2#
        • 2.Qxe3#
        • 2.fxg7#
      • 1...Bxa3!
    • 1.fxg7+?
      • 1...Sf6
        • 2.Rxf6#
      • 1...Sf4!
  • Keys
    • 1.Bxc2!
      • threat
        • 2.Be4#
      • 1...Sxc3+
        • 2.Qxc3#
      • 1...Sb4+
        • 2.cxb4#
      • 1...Sxh3
        • 2.Bd1#
      • 1...Sxf6
        • 2.Qxa8#
      • 1...Se3
        • 2.Sd2#
      • 1...Sf4
        • 2.Rg3#
      • 1...Sb6
        • 2.fxg7#
      • 1...Sc7
        • 2.fxg7#
      • 1...Se7
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);CHECK,OGATE,P_SPINS(e),XP(F)::QAR(E),XS(e)
    • S(e);SBLOCK::S(B)
    • S(e);CHECK,OGATE::QAR(E)+P(F),XS(e)
    • S(e);N_GUARD::R(K)+P(J),XQ(h)
    • S(e);N_GUARD,S_CUTB(j)::QAR(E)+P(F)
  • Tries
    • Try
      • P(F);CHECK
      • Vars
        • S(e);CHECK,N_GUARD,P_SPINS(e)::QAR(E),XS(e)
      • Refutation
        • B(j);XQ(E)
    • Try
      • P(J);CHECK,XQ(h)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::R(K),XS(e)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • B(H);XP(b)
    • Threat
      • B(H)
    • Vars
      • S(e);CHECK,OGATE,P_SPINS(e),XP(F)::QAR(E),XS(e)
      • S(e);CHECK,OGATE::QAR(E)+P(F),XS(e)
      • S(a);N_GUARD,XP(G)::B(H)
      • S(e);OGATEB,P_SPINS(e),XP(J)::QAB(E),XB(i)
      • S(e);SBLOCK::S(B)
      • S(e);SBLOCK::R1(I)
      • S(e);N_GUARD::R(K)+P(J),XQ(h)
      • S(e);N_GUARD,S_CUTB(j)::QAR(E)+P(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).