MESON Chess Problem Database

Problem Display
PID: 225207 (R4Kbk/8/6P1/8/6P1/8/6P1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Suomen Shakki, 2000

R4Kbk/8/6P1/8/6P1/8/6P1/8

#2

5 + 2

5454 Near Snap 2020
6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Kxf7#
    • 1...Bh7
      • 2.g7#
  • Tries
    • 1.Ra3?
      • 1...Ba2
        • 2.Rh3#
      • 1...Bc4
        • 2.Rh3#
      • 1...Bd5
        • 2.Rh3#
      • 1...Be6
        • 2.Rh3#
      • 1...Bf7
        • 2.Rh3#
      • 1...Bh7
        • 2.g7#
      • 1...Bb3!
    • 1.Ra5?
      • 1...Bb3
        • 2.Rh5#
      • 1...Ba2
        • 2.Rh5#
      • 1...Bc4
        • 2.Rh5#
      • 1...Be6
        • 2.Rh5#
      • 1...Bf7
        • 2.Rh5#
      • 1...Bh7
        • 2.g7#
      • 1...Bd5!
    • 1.Ra7?
      • 1...Bb3
        • 2.Rh7#
      • 1...Ba2
        • 2.Rh7#
      • 1...Bc4
        • 2.Rh7#
      • 1...Bd5
        • 2.Rh7#
      • 1...Be6
        • 2.Rh7#
      • 1...Bh7
        • 2.Rxh7#
        • 2.g7#
      • 1...Bf7!
  • Keys
    • 1.Ra1!
      • 1...Ba2
        • 2.Rh1#
      • 1...Bb3
        • 2.Rh1#
      • 1...Bc4
        • 2.Rh1#
      • 1...Bd5
        • 2.Rh1#
      • 1...Be6
        • 2.Rh1#
      • 1...Bf7
        • 2.Rh1#
      • 1...Bh7
        • 2.g7#

Anticipated by 141648(1987)

This anticipates 234786(2016)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);::R(D)+K(E),XB(a)
    • B(a);SBLOCK::P(C)
  • Tries
    • Try
      • R(D);
      • Vars
        • B(a);N_GUARD::R(D)
        • B(a);SBLOCK::P(C)
      • Refutation
        • B(a);
    • Try
      • R(D);
      • Vars
        • B(a);N_GUARD::R(D)
        • B(a);SBLOCK::P(C)
      • Refutation
        • B(a);
    • Try
      • R(D);
      • Vars
        • B(a);N_GUARD::R1(D)
      • Refutation
        • B(a);
  • Actual
    • R(D);
    • Vars
      • B(a);N_GUARD::R(D)
      • B(a);SBLOCK::P(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).