Quick answer
Quick answer: Storm trains speed, because a wrong move costs you ten seconds and the run keeps going. Rush trains care, because three wrong answers end it regardless of the clock. Pick the one that fixes your weakness, not the one you enjoy.
Most players pick by habit and then wonder why the training stopped working.
I read both rule pages before writing this rather than trusting memory. The general form is described on the chess puzzle page, and the two implementations differ more than they look.
How Puzzle Storm works
Three minutes. Solve as many as you can. That's the frame.
A wrong move costs you ten seconds and empties your combo bar. Correct moves fill that bar, and filling it gives time back.
The bonuses grow as you keep going. Five correct moves gives three seconds, twelve gives five, twenty gives seven, and thirty or more gives ten.
It's unrated, so nothing you do there touches your puzzle rating. The published rules sit on the Puzzle Storm page.
How Puzzle Rush works
Three minutes or five minutes, and the puzzles get harder as you go.
Three wrong answers end the run immediately, whatever the clock says. That's the defining rule.
There's also a survival mode with no time limit at all, where the three strikes are the only thing that stops you.
It's unrated too, so your puzzle rating stays untouched. The mode sits on the Puzzle Rush page.
The difference that actually matters
In Storm, a mistake is expensive but survivable. In Rush, your third mistake is fatal.
That changes your behavior within about ten seconds of starting. Storm makes you fast and slightly reckless. Rush makes you careful and slightly slow.
Neither habit is wrong. They're just different habits.
So the honest question isn't which is better. It's which of those two behaviors you need more of right now.
Who should play Storm
Players who see the right move and take too long to trust it.
If your problem is hesitation, a format where mistakes only cost seconds is the one that pushes you to commit.
It also builds pattern recognition faster, because you simply see more positions per session.
And the combo bonus creates a rhythm, which is a genuinely different feeling from grinding puzzles one at a time.
Who should play Rush
Players who move fast and blunder, which is most of us in a real game.
Three strikes forces you to actually check before you commit, and that's the habit that transfers straight into a rated game.
Survival mode is the sharpest version of this. With no clock, there's no excuse for a careless move at all.
If you lose games to one bad move rather than to slow play, this is your format.
Why the harder puzzles change things
Rush ramps up difficulty as your run continues, and Storm's difficulty scales with your solving too.
Either way, your last few puzzles are the ones at your actual limit, and those are where the learning is.
That's an argument for long runs over many short ones, because a short run never reaches the interesting part.
So don't restart the second you make an early mistake. Play the run out.
The scores are not comparable
People compare a Storm score to a Rush score constantly and it means nothing.
Different puzzle pools, different clocks, different endings. A 40 in one is not a 40 in the other.
Compare yourself to yourself, on the same format, over weeks.
That's the only comparison that tells you whether the training is working, and it's the one nobody posts about.
Neither one affects your rating
Both formats are unrated, and this confuses a lot of players.
So a bad run costs you nothing and a great run proves nothing to the rating system. The scoreboard is separate from your puzzle rating entirely.
That's freeing, and it's also a warning. Speed formats aren't measuring your tactical strength, they're training it.
For an actual measurement, rated puzzles one at a time are still the honest test.
The mouse costs you more than you think
In a three minute format, a slow drag is a real loss and hardly anybody works on it.
Practice dropping pieces cleanly and using the board size that suits your screen. A misdrop is a wrong move, and in Rush that's a strike you didn't deserve.
On a phone, a bigger board and a deliberate tap beat quick flicks every time.
I counted my own failed runs and a surprising share of them ended on input rather than on chess.
Openings of a puzzle are the tell
Both formats front load easy positions, which is a chance most players waste.
The first ten are meant to be quick, so bank the time rather than admiring them. That saved time is what carries you through the hard ones later.
But quick is not careless. A strike in the first thirty seconds ruins a run that had everything still to come.
So move fast where you're certain and slow the moment you're not. That switch is the actual skill.
Warm up before you count the score
Your first run of the day is almost always your worst, and it isn't measuring anything.
Treat it as a warm up and ignore the number. Cold pattern recognition is genuinely slower, in the same way cold hands are.
The second and third runs are the ones worth writing down.
Players who log every run including the cold one see a noisier trend and draw the wrong conclusions from it.
How many runs is enough
Three or four in a session, then stop. Quality falls off a cliff after that.
Most players grind ten runs, get worse each time, and conclude they're plateaued. They're tired, which is a different problem.
A short daily habit beats a long weekend session by a wide margin here.
Our look at what fifty puzzles a day actually does has the numbers on that pattern.
Review the ones you missed
This is where nearly all the value is, and nearly everybody skips it.
Both formats show you the puzzles from your run afterwards. Open the ones you got wrong and work out why, slowly.
One reviewed miss is worth more than another whole run, because the miss is the thing you can't yet see.
Write the pattern down in a sentence. Back rank, overloaded defender, whatever it was.
Use them for different weeks
The best approach I found is to alternate rather than to choose.
Spend a week on Rush when your games are full of blunders. Spend a week on Storm when you're playing accurately but running out of clock.
Your recent games tell you which week it is, so let them decide instead of picking a favorite.
That's a better training plan than either format alone, and it costs nothing to follow.
Where a plain puzzle trainer still wins
Neither speed format teaches you to calculate a long forcing line. There isn't time.
For that you need untimed puzzles, one at a time, where you work out the whole sequence before moving.
That's slower, duller and the thing that actually raises a rating in long games.
You can work through positions at your own pace on our puzzles page when the speed formats have done their job.
Our comparison of four puzzle platforms covers what else is worth your time.