MESON Chess Problem Database

Problem Display
PID: 131635 (8/B1p5/7R/1k6/R7/K7/8/8 w - - 0 1)

Ivanovsky, Nikolai Aleksandrovich

Sach, 1997

8/B1p5/7R/1k6/R7/K7/8/8

#2

4 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Rb6#
  • Tries
    • 1.Kb3?
      • 1...c5
        • 2.Rb6#
      • 1...c6!
    • 1.Rh5+?
      • 1...c5
        • 2.Rxc5#
      • 1...Kc6!
    • 1.Re6?
      • 1...c5
        • 2.Rb6#
      • 1...c6!
    • 1.Rf6?
      • 1...c5
        • 2.Rb6#
      • 1...c6!
    • 1.Rg6?
      • 1...c5
        • 2.Rb6#
      • 1...c6!
  • Keys
    • 1.Rha6!
      • 1...c5
        • 2.Rb6#
      • 1...c6
        • 2.R6a5#

Anticipated by 117082(1989)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD,SBLOCK::R1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);N_GUARD,SBLOCK::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(C);CHECK
      • Vars
        • P(b);P_SPINP(b)::R1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD,SBLOCK::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD,SBLOCK::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(b);N_GUARD,SBLOCK::R1(C)
      • Refutation
        • P(b);
  • Actual
    • R(C);
    • Vars
      • P(b);N_GUARD,SBLOCK::R1(C)
      • P(b);SBLOCK::R1(C)
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).