MESON Chess Problem Database

Problem Display
PID: 27557 (3K4/8/3B4/8/6n1/4N3/4N1Rb/7k w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

3K4/8/3B4/8/6n1/4N3/4N1Rb/7k

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Sg3#
      • 2.Rxg1#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Sf2
      • 2.Rxh2#
    • 1...Sxe3
      • 2.Rxh2#
    • 1...Sf6
      • 2.Rxh2#
    • 1...Sh6
      • 2.Rxh2#
  • Tries
    • 1.Sf1?
      • 1...Bxd6
        • 2.Rg1#
      • 1...Bf4
        • 2.Rg1#
      • 1...Bg1
        • 2.Rxg1#
      • 1...Bg3
        • 2.Rg1#
      • 1...Be5
        • 2.Rg1#
      • 1...Sf2
        • 2.Rxh2#
      • 1...Se3
        • 2.Rxh2#
      • 1...Se5
        • 2.Rxh2#
      • 1...Sf6
        • 2.Rxh2#
      • 1...Sh6
        • 2.Rxh2#
      • 1...Kxg2!
    • 1.Sxg4?
      • threat
        • 2.Rxh2#
      • 1...Bxd6
        • 2.Rg1#
      • 1...Bf4
        • 2.Rg1#
      • 1...Bg1
        • 2.Rxg1#
      • 1...Bg3
        • 2.Rg1#
      • 1...Be5
        • 2.Rg1#
      • 1...Kxg2!
    • 1.Bf4?
      • 1...Sxe3
        • 2.Rxh2#
      • 1...Bg1
        • 2.Sg3#
        • 2.Rxg1#
      • 1...Bg3
        • 2.Sxg3#
      • 1...Sf2
        • 2.Rxh2#
      • 1...Se5
        • 2.Rxh2#
      • 1...Sf6
        • 2.Rxh2#
      • 1...Sh6
        • 2.Rxh2#
      • 1...Bxf4!
  • Keys
    • 1.Bg3!
      • 1...Bxg3
        • 2.Sxg3#
      • 1...Sxe3
        • 2.Rxh2#
      • 1...Bg1
        • 2.Rxg1#
      • 1...Sf2
        • 2.Rxh2#
      • 1...Se5
        • 2.Rxh2#
      • 1...Sf6
        • 2.Rxh2#
      • 1...Sh6
        • 2.Rxh2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::S(A),XB(b)
    • S(c);N_GUARD::R1(B),XB(b)
    • S(c);N_GUARD,XS(C)::R1(B),XB(b)
  • Tries
    • Try
      • S(C);
      • Vars
        • B(b);N_GUARD,XB(D)::R1(B)
        • B(b);N_GUARD::R1(B)
        • B(b);N_GUARD::R1(B),XB(b)
        • S(c);N_GUARD::R1(B),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(C);XS(c)
      • Threat
        • R1(B),XB(b)
      • Vars
        • B(b);N_GUARD,XB(D)::R1(B)
        • B(b);N_GUARD::R1(B)
        • B(b);N_GUARD::R1(B),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • B(D);
      • Vars
        • S(c);N_GUARD,XS(C)::R1(B),XB(b)
        • B(b);N_GUARD::S(A),XB(b)
        • S(c);N_GUARD::R1(B),XB(b)
      • Refutation
        • B(b);XB(D)
  • Actual
    • B(D);
    • Vars
      • B(b);XB(D)::S(A),XB(b)
      • S(c);N_GUARD,XS(C)::R1(B),XB(b)
      • B(b);N_GUARD::R1(B),XB(b)
      • S(c);N_GUARD::R1(B),XB(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).