Mary from Japan

Mary, I am sure that you enjoy doing the sudoku puzzles and I hope you will also post some comments from time to time so that we get to know you.

heavy rains travelled though the Chicago area, but brought some cooler weather in it's wake - Cubs made a big comeback on Friday with 8 runs in 2 innings - Go Chicago Cubs - enoy your time on the site, Mary

Hi Mary.Here are some explanations for the 3rd.Aug. Tough:
The grid is numbered a,b......i from left to right,and 1,2......9 bottom to top,similar to a chess board.
Sotir uses the "Eureka" notation,of which there is an understandable translation by Dave from Minnesota (see Archives Sunday Nov.23rd 2008).In short,the first "=" sign means "or".After that,"=" means "Enables" and "-" means "Forbids".
In "English";If i2=8,b6=8;
If h3=8,i4=8.
Either way,c4 and h6 are not 8 .Hence c4=4,h6=2 and unique possibilities to 81.
Hope this helps. Alfred.