Golf’s original championship comes back to Royal Birkdale this week, and with it comes the one major that makes a mockery of a fantasy lineup faster than any other. Links weather turns a projection sheet into a suggestion. A tee time on the wrong side of the draw can bury a top-ten favorite by Friday lunch, and a qualifier nobody penciled in can hang around all weekend. For anyone playing the fantasy spin format – six lineup slots, ten spins, the right to lock up to four players before each pull, that volatility is the whole game. You are not really drafting a team. You are managing a sequence of random draws under a hard constraint, and the single most valuable currency you have is cut equity: the probability that whoever lands in a slot is still playing on Saturday.

The field this week splits into tiers that the spin lays bare. At the top sit Scottie Scheffler and Rory McIlroy, essentially locks to see the weekend, with Southport’s own Tommy Fleetwood and a cluster of major winners close behind. Below them is a broad, flat middle dozens of players hovering between a coin-flip and a two-in-three chance of making it and then the longshots, right down to last-chance qualifier Joe Dean, who grabbed the 156th and final spot on Monday. When a name spins up, the question is never just “is this a good golfer.” It is “is this player good enough, relative to what the next spin is likely to give me, to spend a lock on.” Those are completely different questions, and confusing them is how most spin lineups quietly leak value.

Here is the counterintuitive part that trips people up: an open slot is not worth zero. It is worth whatever the rest of your spins will eventually put in it. Early in the sequence, with plenty of pulls and a lock still in hand, an open slot is worth roughly a 74% cut-probability player because the strong tier shows up often enough that you will almost certainly land one before you run out of chances. That means locking a middling name simply because it “made the cut” is usually a mistake. You are not banking that player; you are spending a slot worth 74% to freeze a player worth less. This week the math draws a clean line: the lock bar is the top cut-equity tier, and anyone short of it should ride back into the pool on the next spin, no matter how tempting the name.

The decision gets sharpest at the end. Once you have spent all four locks, your last two slots are hostage to a single pull they keep whatever the final spin hands them. So the endgame becomes a pure stay-or-spin problem: is the board in front of you worth more than another spin is likely to produce? A single re-spin comes back worse more often than it comes back better, which fools people into standing pat too early. But a losing spin is recoverable while spins remain you can always spin again so the true value of spinning is higher than any one pull’s average. Getting that comparison right, spin after spin, is the difference between a lineup that clears the cut line and one that limps in with a longshot or two dragging it down.

That comparison is exactly what the Spin Advisor app is built to make for you. Upload this week’s field player names with their cut, top-ten, and projected-point probabilities and as each spin comes up, enter who landed in your open slots. The app prices your board against what another spin is worth given the spins and locks you have left, and returns a plain verdict: STAY or SPIN AGAIN. Every player card shows a “match or beat” number the odds a fresh draw lands someone at least as good so you can see at a glance who is worth a lock and who should ride. Alongside the call, it gives you the probability that spinning again actually improves your lineup, and the better/wash/worse split of a single pull. Set your spins remaining, pick whether to rank by cut probability, top-ten upside, or projected points, and let the numbers make the case. At Birkdale, where the cut line is its own lottery, that edge is worth having in your pocket before you touch the wheel.