Alliance selection isn't a simple draft — its serpentine (snake) order creates real game theory you can exploit if you understand the mechanics. The process forms 8 alliances of 3 teams at official events. Round 1 picks run in seed order (Alliance 1 first); Round 2 reverses, so Alliance 8 picks first and Alliance 1 picks last. (Always read the current Game Manual and FMS alliance-selection rules for the exact format and any year-specific procedural changes — recent seasons have adjusted how teams are staged and introduced.)
Implication 1 — the reversal compresses the middle. Because Round 2 runs 8 to 1, the gap between picks for a low-seeded captain (Alliance 7 or 8) is short: you pick again quickly. A high seed (Alliance 1) gets the best first pick but then waits the longest for its second. So Alliance 1 should take the single best available robot in Round 1 and accept that its second pick will be from a thinner pool; Alliance 8 should think of its two picks almost as a pair, since they come close together.
Implication 2 — captains are removed from the pool. A team that accepts a Round 1 invitation can no longer be picked by a higher alliance. This is why a strong robot seeded just outside the top 8 is so valuable, and why borderline captains face a real choice: stay a captain of your own alliance, or (if the rules allow declining) hold out hoping a stronger alliance picks you. The FMS process supports a team declining a pick, but know your event's exact decline consequences cold before you sit down.
Implication 3 — predict the picks above you. Before selection, simulate it: list the likely top-8 captains and, using your pick-list logic, predict who each will take. This tells a fringe team roughly when its name might be called and lets a captain anticipate that the partner they want may be gone by their slot — so they prepare a ranked tier, not a single target. If you're Alliance 4 and your dream first-pick is also the obvious choice for Alliances 1–3, plan for them to be gone.
Implication 4 — the third robot is a specialist. Traditionally the captain and first pick fill similar high-value roles, while the second pick is a support specialist — a dedicated defender, a reliable climber, or an auto specialist. Don't waste your second pick trying to replicate your first; pick the gap in your alliance's capability.
The captain's table discipline: announce picks clearly, track who's been taken on a printed bracket, and never freeze. With a tiered list and a simulated draft in hand, every decision is one you already rehearsed.
Key takeaways
- Selection is serpentine: Round 1 runs 1->8, Round 2 reverses 8->1, so low seeds pick again quickly while Alliance 1 waits longest for its second pick.
- Accepting a captaincy removes you from the pool; the FMS process allows declining a pick, so know your event's exact decline consequences first.
- Simulate the picks above you in advance and treat the second pick as a specialist (defender/climber/auto), not a clone of the first.
Lesson quiz
RequiredAnswer all 3 questions correctly to complete this lesson.
01.In the FRC reverse-snake (serpentine) alliance selection, how does the picking order differ between Round 1 and Round 2?
02.At a standard official FRC event, how many alliances are formed and how many teams play on each alliance?
03.When selecting the third robot (your second pick) for an alliance, how should it be chosen relative to the captain and first pick?
Answer every question to submit.
All 34 lessons in Drive Team
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