MESON Chess Problem Database

Problem Display
PID: 74728 (n2k4/5K2/1nR5/8/3N2B1/8/8/8 w - - 0 1)

McDowell, Michael

1st HM., Buletin Problemistic Miniature Ty., 1990

n2k4/5K2/1nR5/8/3N2B1/8/8/8

#2

4 + 3

3310 2345 Chess Problems 1997
5454 Near Snap 2007
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Rc8#
    • 1...Sc4
      • 2.Rc8#
    • 1...Sd5
      • 2.Rc8#
    • 1...Sd7
      • 2.Se6#
    • 1...Sc8
      • 2.Rxc8#
  • Tries
    • 1.Bh3?
      • 1...Sa4
        • 2.Rc8#
      • 1...Sc4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sd7
        • 2.Se6#
      • 1...Sc8
        • 2.Rxc8#
      • 1...Sc7!
    • 1.Bf5?
      • 1...Sa4
        • 2.Rc8#
      • 1...Sc4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sd7
        • 2.Se6#
      • 1...Sc8
        • 2.Rxc8#
      • 1...Sc7!
    • 1.Rc1?
      • 1...Sc7
        • 2.Sc6#
      • 1...Sa4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sd7
        • 2.Se6#
      • 1...Sc8
        • 2.Rxc8#
      • 1...Sc4!
    • 1.Rc2?
      • 1...Sc7
        • 2.Sc6#
      • 1...Sa4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sd7
        • 2.Se6#
      • 1...Sc8
        • 2.Rxc8#
      • 1...Sc4!
    • 1.Rc3?
      • 1...Sc7
        • 2.Sc6#
      • 1...Sa4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sd7
        • 2.Se6#
      • 1...Sc8
        • 2.Rxc8#
      • 1...Sc4!
    • 1.Rc4?
      • 1...Sc7
        • 2.Sc6#
      • 1...Sa4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sd7
        • 2.Se6#
      • 1...Sc8
        • 2.Rxc8#
      • 1...Sxc4!
    • 1.Rc7?
      • threat
        • 2.Se6#
      • 1...Sxc7
        • 2.Sc6#
      • 1...Kxc7!
  • Keys
    • 1.Rc5!
      • 1...Sc7
        • 2.Sc6#
      • 1...Sa4
        • 2.Rc8#
      • 1...Sc4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sd7
        • 2.Se6#
      • 1...Sc8
        • 2.Rxc8#

Anticipated by 11234(1937), 96981(1949), 184(1950), 87540(1982)

FEATURES

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