Problem Display
PID: 133540 (3K4/8/1p1B1p2/3k1N2/P2N2P1/3p4/3P4/3B4 w - - 0 1)

Rice, John Michael

The Field, 1961

(First published on Thu Jun 15 1961)

3K4/8/1p1B1p2/3k1N2/P2N2P1/3p4/3P4/3B4

#2

8 + 4


5454 Near Snap 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Kc4
      • 2.Bb3#
    • 1...Ke4
      • 2.Bf3#
  • Tries
    • 1.Kc7?
      • 1...Kc4
        • 2.Bb3#
      • 1...Ke4
        • 2.Bf3#
      • 1...b5!
    • 1.Kd7?
      • 1...Kc4
        • 2.Bb3#
      • 1...Ke4
        • 2.Bf3#
      • 1...b5!
    • 1.Ke7?
      • 1...Kc4
        • 2.Bb3#
      • 1...Ke4
        • 2.Bf3#
      • 1...b5!
    • 1.Kc8?
      • 1...Kc4
        • 2.Bb3#
      • 1...Ke4
        • 2.Bf3#
      • 1...b5!
    • 1.Ke8?
      • 1...Kc4
        • 2.Bb3#
      • 1...Ke4
        • 2.Bf3#
      • 1...b5!
  • Keys
    • 1.Sb5!
      • 1...Kc4
        • 2.Se3#
      • 1...Ke4
        • 2.Sc3#
      • 1...Kc6
        • 2.Bf3#
      • 1...Ke6
        • 2.Bb3#

Anticipated by 69030(1957)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(A)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • P(c);
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • P(c);
    • Try
      • K(H);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • P(c);
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • P(c);
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • P(c);
  • Actual
    • S(D);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • K(b);S_FLIGHT::S(D)
      • K(b);S_FLIGHT::B(A)


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).