First few days…this course showed me where I needed to focus to play better chess. A week later, I reviews blundering…today played 11 games and blundered 1 time only. Changed my game time to 15/10, use Stonewall & Owen’s openings exclusively for a while, and do blunder check on every single move. It works. My game elo is up astonishingly and chess is fun again. Thanks, Nelson. Great course.