Scrabblecheat.com demo of how to use 10 checkboxes to bind letters to a specific position.
2Pause the video as needed so you can read and understand at your own pace. The video I made goes fast so I advise pausing to read the text if needed. Scrabble cheat lets you bind the first letter you enter in the main textbox to the first letter in words returned. Or you can bind the 6th letter by checking the 6th box and this means the 6th letter you entered in the main textbox must be the 6th letter in all words returned. You can check multiple boxes like the 4th 7th and 8th checkbox and if you entered abcdefghijk then only words with the 4th letter D and the 7th letter G and the 8th letter H will be returned. If a word doesn't have all 3 of these letters in those exact spots the word will not be returned.
A user wanted to go in reverse so we added this. Select Reverse in the checkbox first. Now we count the last checkbox, the 10th checkbox as the last letter in the word. We do this because words have different lengths. So if check the second to last checkbox, the 9th box and you entered abcdefghijkl then K is used as it is the second to last letter. If you had checked the 10th box then l would be used because the 10th checkbox represents the last letter in the word. So you checked the 9th checkbox so make sure the letter you want to be in the second to last spot of each word is entered as the second to last letter in the main textbox.
It is simple once you see Reverse will use the last checkbox as the last letter in the word. 9th checkbox is second to last letter in the word. 8th checkbox is the third to last letter in the word. So if you entered the letters YULP and selected the 8th checkbox then only words with U as the 3rd to last letter would be returned. To make it easy I entered earerxdstyulp and hit return with the 8th checkbox checked and got DEPARTURE returned and you see U is the 3rd to last letter. Now I use the letters rtust and get the word TRUST returned as u is the 3rd to last letter. So you see length has nothing to do with it. The 8th checkbox will always means the 3rd to last letter no matter what the length. In certain circumstance Reverse will be exactly what a user needs.