Heat Odds: What Boost and Stress Really Cost

Heat has two kinds of luck: the cards you draw, and the cards you flip. Drawing is the slow kind; you plan around it over several rounds. Flipping is fast. Every Boost and every Stress card adds a number you do not know until it lands, and it counts toward your Speed at the next corner. This lesson puts plain numbers on that. Every figure below comes from the deck contents in the Rules booklet.

How a flip works

When you Boost or play a Stress card, you flip cards from the top of your deck. Any card that is not a Basic card, including Heat, Stress, and the Starting Upgrades 0 and 5, goes straight to your discard pile. You keep flipping until a Basic card appears, and that card’s value is added.

So the result is always 1, 2, 3, or 4, and the chance of each is the share of that value among the Basic cards still in your deck.

A fresh deck: a fair four-sided die

Your 12 Basic cards are three each of 1, 2, 3, and 4. With all of them in your deck, a flip is like rolling a four-sided die:

The average is 2.5 Spaces.

The real cost of Boosting into a corner

Boost costs 1 Heat up front. If it pushes you over a corner’s limit, you pay again at step 7. What matters is your margin: how far your Speed is under the limit before you Boost.

Here is the average total Heat for one Boost with a fresh deck, counting the 1 Heat for the Boost itself:

To check one row: at a margin of 1, a flip of 1 costs nothing more, and flips of 2, 3, and 4 cost 1, 2, and 3. That averages 1.5, plus the Boost’s own 1.

So at margin 0, an average Boost buys about 2.5 Spaces for about 3.5 Heat. Sometimes that is still right, for example when the Spaces carry you to a slipstream spot or the finish line. But it is rarely cheap. At a margin of 4 or more, Boost is the best deal in the game: 1 Heat for an average of 2.5 Spaces.

If you might not cross the line at all, the odds get better still. The table above assumes you cross.

Stress cards near corners

A Stress card in your Play Area works the same way, with no Heat up front. Played at margin 0 into a corner, it costs an average of 2.5 Heat. That is why the beginner lesson says to play Stress on straights.

How a used deck changes the odds

The flip only finds Basic cards still in your deck. Cards in your hand, Play Area, and discard pile are out of it until the next shuffle.

Say you have played and discarded most of your 4s and 3s since the last shuffle. If the Basic cards left in your deck are three 1s, two 2s, and one 3, a flip averages (3 + 4 + 3) / 6, about 1.7. The other way round, a deck heavy with 4s averages well above 2.5.

You may not browse your discard pile, but you may remember what you played. Tracking your 4s since the last shuffle is enough to know whether your next Boost leans high or low.

The opening hand

A few numbers about the first seven cards, from the 18-card starting deck:

• Your Starting Heat card is in your opening hand about 39% of the time (7 in 18).
• At least one Stress card is in your opening hand about 80% of the time.
• On average, you start with a little more than one Stress card (7 times 3 in 18).

So plan to play a Stress card early in most races. The first long straight is the place.

Flips that help

Flipping has a small upside: any Heat card you flip past goes to your discard pile, not your hand. A Boost on a straight cycles your deck a little and can bury a Heat card that would otherwise have clogged your next draw. It is a side effect, not a reason to Boost, but it is free.

Luck you can price

Heat feels swingy because a single flip can add up to 4 Heat to one corner bill. But the swing is in your hands: you choose the margin. Our piece on luck vs skill calls this the difference between randomness you plan around and randomness that overrules you. In Heat, the margin is the plan.