Problem Display
PID: 76796 (5K2/6p1/5k2/4N2Q/8/8/8/8 w - - 0 1)

Butwillo, Brother

The Tablet, 1945

(First published on Sat Jul 28 1945)

5K2/6p1/5k2/4N2Q/8/8/8/8

#2

3 + 2


15239 Valois Notebooks 2016
5454 Near Snap 2020

SOLUTION


  • SOUND
  • Tries
    • 1.Sd3?
      • 1...g5
        • 2.Qf7#
      • 1...g6
        • 2.Qe5#
      • 1...Ke6!
    • 1.Sf3?
      • threat
        • 2.Qf7#
      • 1...g6
        • 2.Qe5#
      • 1...Ke6!
    • 1.Sc6?
      • 1...g5
        • 2.Qf7#
      • 1...g6
        • 2.Qe5#
      • 1...Ke6!
  • Keys
    • 1.Sc4!
      • 1...Ke6
        • 2.Qf7#
      • 1...g5
        • 2.Qf7#
      • 1...g6
        • 2.Qe5#

This anticipates 203049(1990)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);P-FLIGHT::QAB1(B)
      • P(b);SBLOCK::QAR1(B)
      • P(b);SBLOCK::QAB1(B)


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).