Hello guys! Zoe from LPU here I'm sure there are some of you would want to solve the puzzle without cheating, whether as practice or fun or whatever I have come up with a logical way in doing the puzzle. This method can be used for ANY square/rectangular puzzle from 1 by 1 to 100 by 200 Firstly, we'll use an example piece where * is the blank piece: G L R S T C B Q F J K A D E M H N I * O Step 1: solve the 1st row and 1st column, you need not care about messing up other pieces that's outside of the 1st row and 1st column, even if they are matching or whatever, you will get it eventually. A B C D E F O Q S J K G L H M P N I R * Step 2: Then you're left with a smaller grid and now you work the 2nd row 2nd coloumn WITHOUT touching the ones that you worked before. Keep in mind that you DON'T have to touch the ones that you worked in the 1st step because your border of grids have become smaller! A B C D E F G H I J K L N R S P Q M O * Step 3: A smaller grid again and it should be easy now. A B C D E F G H I J K L M N O P Q R S * Few things to note: The blank piece will always be at the corners but when you are solving it, you don't always have to make sure it's in the corners, just make sure you get your pieces in the columns and row right This method works for any puzzle. Have fun not cheating!