MESON Chess Problem Database

Problem Display
PID: 261926 (8/8/8/8/8/R2K4/Nb3R2/rk6 w - - 0 1)

Mikan, Ilja

Problemnoter, 1954

8/8/8/8/8/R2K4/Nb3R2/rk6

#2

4 + 3

5454 Near Snap 2022
6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sc3#
  • Tries
    • 1.Sc3+?
      • 1...Kc1
        • 2.Rf1#
        • 2.Rc2#
      • 1...Bxc3!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Rfxb2#
        • 2.Rbxb2#
      • 1...Kxa2
        • 2.Rfxb2#
      • 1...Rxa2
        • 2.Rf1#

This anticipates 121400(1963)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD,SBLOCK::S(A)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • B(c);XS(A)
  • Actual
    • R(C);P_PINB(c)
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT,XS(A)::R1(B),XB(c)
      • R(a);SBLOCK,XS(A)::R(B)
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).