The opening flight of the $600 Deep Stack Kick Off ($1M GTD) is officially locked in.

Late registration has now closed in Day 1a, with 378 entries recorded as players packed the Borgata for the first of six starting flights.

The field has already been trimmed to 90 players, with plenty more eliminations still to come before bags are handed out at the end of the night. Forty-eight players are guaranteed a payday, while only the final 31 survivors will secure a spot in Sunday's Day 2.

Meanwhile, the action is just getting underway in Day 1b. The evening flight has attracted 89 entries through its opening levels and is heading into its first break, with late registration remaining open until the start of Level 13.