** Only 61 moves ** Solution to Microsoft Solitaire Collection Star Club Windows 10 1st Anniversary Spider Medium - Earn a score of 900 (#4) Here are the results of my priceless competitors: Played4U - 79 moves Marcela Martinez - 70 moves (published 12/13/2018) Zeming Jin - 70 moves (published 7/19/2016) My solution is unmistakably the most efficient. Note: You have to do a little math to obtain the move count. And be aware that the application doesnt count a move that completes a stack. Let A2 be the initial score. Let B2 be the final score. Let C2 be the number of stacks completed. The Excel formula is: A2-(B2-(C2*100)) So, in this case, 500 - (939 - 500) = 500 - 439 = 61