Expanding upon the technique using the edges I described above, the clues of 1 are perhaps the most useful. Many of koko's puzzles utilize this logic and I'll demonstrate using 3688: Rockfish.

The most basic of the tricks using clues of 1 can be demonstrated using the bottom-left corner of the puzzle (see attachment named "1s end"). If the triangle with the red dot is black, the clue to the left says that the next several to the right will be black also. Since there can only be one black in the more vertical row, the red triangle cannot be black. Similar logic can be used for each of the triangles with blue dots.

A more complex trick is based on the Multi Line Solving technique described as Example 3 in the Griddler Tutorial. Instead of looking at more than one row to find a conflict, you only have to look at the cross-clues for rows with clues of 1. For an example of this, see the attachment below called "1s conflict". Here, the clues of 1 provide us with enough information to find exactly which 18 triangles are black.

As you become more familiar with this technique, you will notice that whenever 2 adjacent rows have clues of 1 and the edge cross-row has clues of 3 or higher, you know that the triangles between the 2 rows are blank - I have marked examples of this with blue dots.

There's also a tip from somewhere among the triddler tips that if you have a row with an even clue, one end of the segment will have a cross-clue of 1. It works, but the logic behind the proof is difficult to explain. In the attached example, the endpoint is from the cross-row with the red dot.

These techniques are primarily used in the more difficult triddlers, but I use them often.

*Comment: the trick of using the keyboard numbers to choose colors not in the puzzle does work in the new applet as long as you have already chosen a color besides the default ones.