MESON Chess Problem Database

Problem Display
PID: 6850 (8/8/8/K2n4/8/8/N4QN1/3k4 w - - 0 1)

Lebedev, Aleksandr N

Els Escacs a Catalunya, 1934

8/8/8/K2n4/8/8/N4QN1/3k4

#2

4 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sb4
      • 2.Se3#
    • 1...Sf4
      • 2.Se3#
    • 1...Sb6
      • 2.Se3#
    • 1...Sf6
      • 2.Se3#
    • 1...Sc7
      • 2.Se3#
    • 1...Se7
      • 2.Se3#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Qe1#
        • 2.Qc2#
      • 1...Kc1
        • 2.Qc2#
      • 1...Se3
        • 2.Qe1#
      • 1...Sxb4!
  • Keys
    • 1.Qb2!
      • 1...Sc3
        • 2.Sxc3#
      • 1...Se3
        • 2.Sc3#
      • 1...Sb4
        • 2.Sc3#
      • 1...Sf4
        • 2.Sc3#
      • 1...Sb6
        • 2.Sc3#
      • 1...Sf6
        • 2.Sc3#
      • 1...Sc7
        • 2.Sc3#
      • 1...Se7
        • 2.Sc3#

Anticipated by 203240(1924)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 8
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • S(b);::QAR1(B)
      • Refutation
        • S(b);XS(A)
  • Actual
    • Q(B);
    • Vars
      • S(b);N_GUARD::S(A),XS(b)
      • S(b);N_GUARD::S(A)
HTML5 logo

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).