MESON Chess Problem Database

Problem Display
PID: 174450 (3N1b2/8/3p4/1P1k1P1K/Rnp1p1N1/1qpPB3/8/3Q2n1 w - - 0 1)

Makaronets, Leonid

1st Place, Tel Aviv, 1992

3N1b2/8/3p4/1P1k1P1K/Rnp1p1N1/1qpPB3/8/3Q2n1

#2

9 + 9

721 Variantim 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.dxc4#
    • 1...Sc2
      • 2.dxc4#
    • 1...Sa6
      • 2.dxc4#
    • 1...Sc6
      • 2.dxc4#
    • 1...cxd3
      • 2.Qxb3#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sf4#
        • 2.Sc7#
      • 1...cxd3
        • 2.Qxb3#
      • 1...Bh6
        • 2.Sc7#
      • 1...Se2
        • 2.Sc7#
      • 1...Sh3
        • 2.Sc7#
      • 1...Sa6
        • 2.Sf4#
        • 2.dxc4#
      • 1...exd3!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sf6#
      • 1...Qxd1
        • 2.Sxb4#
      • 1...Sxc6
        • 2.dxc4#
      • 1...cxd3
        • 2.Qxb3#
      • 1...Be7
        • 2.Sxe7#
      • 1...Bg7
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(d);::QAR(A)+P(B)DCHECK,XP(e)
    • P(e);OGATEB,P_SPINP(e),XP(B)::QAB(A),XQ(b)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);OGATEB,P_SPINP(e),XP(B)::QAB(A),XQ(b)
        • B(i);::S(I)
        • S(a);::S(I)
      • Refutation
        • P(f);P_SPINP(f),XP(B)
  • Actual
    • S(I);
    • Threat
      • S(E)
    • Vars
      • Q(b);N_GUARD,P_PINS(E),XQ(A)::S(I),XS(d)
      • S(d);XS(I)::QAR(A)+P(B)DCHECK,XP(e)
      • P(e);OGATEB,P_SPINP(e),XP(B)::QAB(A),XQ(b)
      • B(i);N_GUARD::S(I),XB(i)
      • B(i);N_GUARD::S(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).