Ante

Tournament level, blinds 100/200, a 25 ante, nine-handed. Before anyone acts the pot holds 300 from the blinds plus 225 from the nine antes, 525, nearly double what the blinds build alone. Folded to you in the cutoff with Q-7 suited, a raise to 450 risks 450 to pick up 525 in dead money, so it only has to work a little under half the time to turn a profit. Strip the ante and that same raise fights for a 300 pot and now needs to work three times in five: Q-7 suited stops being a clear steal.

That's the job of the ante: it taxes every hand dealt, not just the two blind seats. Folding gets more expensive, stealing pays better. Late in tournaments antes often outgrow the blinds, which is why good players open wider and defend wider once they kick in. Sitting back for premium hands bleeds a stack faster than the blinds ever could alone.

Most tournaments now collect it as a big blind ante: instead of nine players each tossing in 25 every hand, the big blind posts one lump 200 alongside the blind, and the dealer deals. The dead money is the same and the strategy doesn't move (the pot still starts fat), but the bookkeeping changes. At 100/200 with a 200 big blind ante, the pot is 500 before a single decision, and the big blind seat pays 400 for the orbit whether it plays a hand or not. If a short stack can't cover both blind and ante, the house has a rule for which posts first, worth knowing before you're the stack it applies to.

The same dead money that pays the stealer pays the defender. Back at 100/200 with antes, a min-raise to 400 attacks 525; sitting in the big blind you already have 200 out there, so continuing costs 200 more with 925 already in the middle, better than 4.5-to-1. Almost nothing you're dealt is bad enough to fold at that price against a late-position player opening most hands. Ante poker squeezes from both ends: steals need to work less often, defends need to win less often, and so ranges widen everywhere at once.

The beginner mistake is treating the ante like background noise instead of a cue to loosen up, same tight range as the ante-less levels, blind to how the extra dead money shifts the math on marginal steals and marginal defends. Its cousin is miscounting the big-blind-ante pot: forget the lump 200 sitting in the middle and every price you compute is off before the flop ever lands.