** Only 70 moves ** Solution to MS Solitaire Collection, Daily Challenge, 4/15/2015, Spider, Earn a score of 900 Here are the results of my priceless competitors: Marcela Martinez - 80 moves (only one solution found on YouTube) 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 - (930 - 500) = 500 - 430 = 70