HoDoKu Two String Kite

There are only two positions for {0} in both {1} and {2} (the two strings), and they both hit {3} (the kite), therefore {4} cannot be {0}.

The logic is: There are only two possible positions for {0} in {1}:

  1. If cell {5} is {0} then {7} cannot be {0} (same box),
    therefore {8} must be {0} (only remaining position in col),
    and therefore {4} cannot be {0} (same row).
  2. Alternately, if {6} is {0} then {4} cannot be {0} (same col).
Hence there's only two places for {0} in {1}, and neither allows {4} to be {0}.

Therefore {4} cannot be {0}.