Hi, I used a bit of html and a small php program to pass this level. The html code is realy just a form to enter the numbers and the php works out the task and prints out the answer using LET z = y - x PRINT CHR$(z); NEXT skip copy the numbers printed into the window and press the submit button, job done! So yes you can use php to pass the level. You could make it print the answer directly into the window but I was being lazy and just copied and pasted it into the window myself.