

That should be enough to get you started but you need to get the hang of overlapping possibilities if you want to get good. Additionally, the rightmost vertical column has three squares you can fill in along it's length if you use the overlapping technique. Using that method, that's already 7 squares you can fill in without a problem. So in the puzzle you've got two 9 in a series of clues and one 8. In a 9 clue, there are always 3 squares that would be filled no matter which side you start from.Ī simple rule of thumb is "If the clue (X) is greater than half of the length of the row (Y), you can fill in the middle squares." I'm not good at maths so someone could probably word that better. In a 15x15 square with an 8 clue, when you look at the 8 being as far left and as far right as possible, there is a square in the middle that is filled in both possibilities. Ok, with 15x15 squares anything that's 8 or higher is guaranteed to have dots in the middle thanks to overlapping. Starting off with this method in a Mega Picross puzzle is always a good way to get the ball rolling, then you can look for clues in the normal rows. In the bottom example, there's no way of safely determining an empty square with that method because those dots could be anywhere.īasically, make sure you always add the same number of X's as the single clue in it's adjacent column. Basically, this clue says "At some point after the big group, there is a group of three blocks on the bottom row, nothing after it and nothing on top." Considering the very last place the three blocks could be is right at the end, we know it is impossible for anything to be in the last three blocks in the top row so we can mark them out safely. We have no idea of working out where it is considering there are no other clues but the lack of any other number in the top row means we know where there is definitely nothing. In the first example, there is only one number after the Mega Clue.

One trick that is invaluable is finding any two rows that end with a single number clue. Mega Picross (aka Alt Mode) is a whole different ball game but uses the same basic methods. Then it's all a matter of going through patiently.

These tutorials will help you get the hang of non-obvious clues.
