In Puzzle 18, you need to gamble and play VUM 4b (16), setting up your O and hoping that you draw a bingo. Your opponent is unlikely to have an O after JAB, and HIOST gives yourself an opportunity bingo on row 13 if you draw an N. Other plays like OHM surrender an easy bingo line with a poor bingo leave (because of the V) don’t open up the high scoring bingo lane that you will probably need to win this game.