Shinro Puzzles

Step 1:

For rows or columns with only 1 hole and a horizontal or vertical arrow (as highlighted in yellow), eliminate the squares (shown in red below) behind each arrow.

Step 3:

For rows or columns that have only one hole, if a hole has been found in that row/column, eliminate the remaining squares in that row/column. (Note that if a row or column has zero holes, all squares in that row/column can be automatically eliminated.)

Step 5:

As before, if the appropriate number of holes have been found for a given row or column, eliminate the remaining squares in that row/column.

Step 7:

Continue to eliminate squares based on finding all of the holes in a given row or column.

Step 9:

Eliminate more squares using the logic outlined earlier.

Step 11:

Continue to eliminate squares.

Step 13:

Eliminate more squares.

Step 2:

Find any diagonal arrows that point to only one remaining empty square. Enter a "hole" (shown in green below) in that square.

Step 4:

Once again, find any diagonal arrows that point to only one remaining empty square. Enter a "hole" (shown in green below) in that square.

Step 6:

Continue to check for diagonal arrows pointing to a single open square. In addition, if any horizontal or vertical arrows now point to only one open square, enter a hole in that square as well.

Step 8:

Continue to check for arrows pointing to a single open square.

Step 10:

Find more holes based on arrows pointing to single open squares.

Step 12:

For rows or columns where the number of open squares (combined with any holes already found for that row/ column) is equal to the number of holes specified for the row or column, enter holes in any remaining squares.

Step 14:

Enter any remaining holes based on the number of holes specified for the row/column.

Congratulations!  You've successfully solved the Shinro puzzle.