Googleユーザー
I love the concept of training visualization skills in terms of imagining a position several moves ahead, but unfortunately the application crushes every now and then especially when there are multiple ways to deliver checkmate and the user plays one of them. IMHO, the move generator by which the computer moves are calculated seems to have some bugs, or the concurrency has something to do with the problem guessing from error messages IIRC.
Thanks for the review.
Version 3.0 which will be available around the end of February, will replace the mate and tactics puzzles with the 1.3 million puzzles created by Lichess. Mates with multiple solutions should be totally correct. Please check back.