MESON Chess Problem Database

Problem Display
PID: 110025 (8/8/1KR5/1n1k4/4R3/3B4/8/8 w - - 0 1)

Stocchi, Ottavio

Il Littorale, 1929-1931

8/8/1KR5/1n1k4/4R3/3B4/8/8

#2

4 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Rc5#
  • Tries
    • 1.Ree6?
      • 1...Sd6
        • 2.Rcxd6#
      • 1...Sa3
        • 2.Rcd6#
      • 1...Sc3
        • 2.Rcd6#
      • 1...Sd4
        • 2.Bc4#
        • 2.Be4#
        • 2.Rcd6#
      • 1...Sa7
        • 2.Rcd6#
      • 1...Sc7
        • 2.Rcd6#
      • 1...Kd4!
    • 1.Rcc4?
      • 1...Sa3
        • 2.Rcd4#
      • 1...Sc3
        • 2.Rcd4#
      • 1...Sd4
        • 2.Rcxd4#
      • 1...Sd6
        • 2.Rcd4#
        • 2.Rc5#
      • 1...Sa7
        • 2.Rcd4#
      • 1...Sc7
        • 2.Rcd4#
      • 1...Kd6!
    • 1.Rce6?
      • threat
        • 2.Bc4#
      • 1...Sd4
        • 2.R4e5#
      • 1...Sd6
        • 2.R6e5#
      • 1...Sa3!
  • Keys
    • 1.Rc8!
      • 1...Kd6
        • 2.Rd8#
      • 1...Sa3
        • 2.Rd8#
      • 1...Sc3
        • 2.Rd8#
      • 1...Sd4
        • 2.Rd8#
      • 1...Sd6
        • 2.Rc5#
      • 1...Sa7
        • 2.Rd8#
      • 1...Sc7
        • 2.Rd8#

Anticipated by 21570(1919), 137402(1929)

This anticipates 77662(1930), 85958(1965), 176341(1972), 15422(1983), 143815(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::R1(D)
  • Tries
    • Try
      • R(B);
      • Vars
        • S(a);N_GUARD::R1(D),XS(a)
        • S(a);N_GUARD::R1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(D);
      • Vars
        • S(a);N_GUARD::R1(D)
        • S(a);N_GUARD::R1(D),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(D);
      • Threat
        • B(A)
      • Vars
        • S(a);SBLOCK::R1(B)
        • S(a);SBLOCK::R1(D)
      • Refutation
        • S(a);
  • Actual
    • R(D);
    • Vars
      • K(b);P-FLIGHT::R(D)
      • S(a);N_GUARD::R(D)
      • S(a);SBLOCK::R1(D)
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).