In Puzzle 10, you’ll need to bingo ASAP if you want to win.  While the weakest bingo tile appears to be the H, upon further inspection you’ll actually want to fish the D off, with ID 9f (10).  Your opponent is extremely likely to block the bingo lines through the I/E/R in columns 15-18, reasoning that bingos are most likely in that location and that other bingos won’t score as much, leaving the biggest bingo threat as the O at 1h.  Fortunately, EHINORT not only draws several bingos to the O, but also hits the TWS with words such as ANTIHERO, HEREINTO, OTHERING, and ORNITHES, not to mention some other bingos (THERMION, THRONIER) which can still win given a favorable draw.