MESON Chess Problem Database

Problem Display
PID: 240708 (4N3/1b2B2q/4p3/4k3/1Rn1P1nR/8/K2P1Q1b/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1989

4N3/1b2B2q/4p3/4k3/1Rn1P1nR/8/K2P1Q1b/8

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Bd6#
    • 1...Sxd2
      • 2.Bd6#
    • 1...Sa3
      • 2.Bd6#
    • 1...Sce3
      • 2.Bd6#
    • 1...Sa5
      • 2.Bd6#
    • 1...Sb6
      • 2.Bd6#
    • 1...Sd6
      • 2.Bxd6#
    • 1...Sxf2
      • 2.Bf6#
    • 1...Sge3
      • 2.Bf6#
      • 2.Qf6#
    • 1...Sf6
      • 2.Bxf6#
      • 2.Qxf6#
      • 2.d4#
    • 1...Sh6
      • 2.Bf6#
      • 2.Qf6#
      • 2.d4#
  • Tries
    • 1.Bf6+?
      • 1...Sxf6
        • 2.Qxf6#
        • 2.d4#
      • 1...Kxe4!
    • 1.Qf6+?
      • 1...Sxf6
        • 2.Bxf6#
      • 1...Kxe4!
  • Keys
    • 1.Qe3!
      • threat
        • 2.d4#
      • 1...Qxe4
        • 2.Rh5#
      • 1...Bxe4
        • 2.Rb5#
      • 1...Sxd2
        • 2.Bd6#
      • 1...Scxe3
        • 2.Bd6#
      • 1...Sgxe3
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(b);N_GUARD::B(G)
    • S(b);N_GUARD,XP(B)::B(G)
    • S(b);N_GUARD::B(G),XS(b)
    • S(c);N_GUARD,XQ(C)::B(G)
  • Tries
    • Try
      • B(G);CHECK
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b),XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);OGATE,XQ(C)::B(G),XS(c)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b),XP(E)
  • Actual
    • Q(C);
    • Threat
      • P(B)
    • Vars
      • Q(g);N_GUARD,P_SPINQ(g),XP(E)::R(F)
      • B(f);N_GUARD,P_SPINB(f),XP(E)::R(D)
      • S(b);N_GUARD,XP(B)::B(G)
      • S(b);N_GUARD,XQ(C)::B(G)
      • S(c);N_GUARD,XQ(C)::B(G)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).