SolveInvite DecoderFree
Your Solve invitation already tells you which games you'll play
Pick the length in your invitation to see the games and the clock for each, as candidates report them. Add your test date and we'll email a plan: weekly at first, then one task a day in the last two weeks. It stops the day your test is done.
Pick your length. See the games. Get a plan to test day.
Adds the Sustainable Futures Lab, a 20-minute judgment task. Block 2 hours.
85-minute invitation: Redrock Study 35 minutes, Sea Wolf 30 minutes, Sustainable Futures Lab 20 minutes. Reported by candidates.
What you get
- The games your length means, with each one's clockso you practise the right ones and nothing from an out-of-date guide.
- A plan to your test date: weekly, then one task a day for the last two weeksso each of those last days has one clear job instead of another walkthrough.
- Day 1 is a full Redrock study on the clock, freeso your first timed run happens at home, not on test day.
- A source and a date on every factso you can tell what McKinsey says from what candidates report.
- It stops on your test day.Unsubscribe in one click, any time.
01 · What arrives
One email, within a minute of confirming
The games for your length, your plan to test day, and Day 1.
Your Solve plan: the days to your test
Your 85-minute invitation, decoded
Redrock 35 · Sea Wolf 30 · SFL 20
Your runway
Pick your test date above and this fills in: one task a day for your last two weeks.
Day 1: Ecotopia, a full Redrock study. 35 minutes on the clock, free.
02 · Why length matters
A 65-minute invitation is reportedly Redrock and Sea Wolf. 85 adds the Sustainable Futures Lab. Each game has its own clock, and time saved in one doesn't carry to the next.
Source: candidate reports, checked 23 Sep 2026.
03 · How it runs
Your plan arrives when you confirm. While your test is more than two weeks away, one email a week for up to four weeks (a test further out has a quiet gap after that); in the last two weeks, one a day at 7:00 your time. Up to three of them are about Solve VIP, our paid practice, and the first one mentions it in a P.S.; the rest are practice only. Two days after your test, one email asks how it went. Then it stops.
Before you send it
Test facts on this page: reported by candidates, sources checked 23 Sep 2026. McKinsey's own line: “The length of your Solve assessment is outlined in your invitation email.”
No. McKinsey publishes the length in your invitation and an FAQ. Which games each length holds is what candidates report, compiled from prep sites. We label which is which and date every source. DrillCase is independent and not affiliated with McKinsey.
Yes. The Decoder, the plan emails and the Ecotopia Redrock study are free. DrillCase also sells Solve practice; up to three of the plan emails are about it, and the first mentions it in a P.S.
Tick “I don't have an invitation yet”. You'll get a weekly foundations plan, and we'll ask for your date when you have one.
Your invitation wins. Reply to any of our emails with what it says and we'll check and date the change.
Two days later, one email asks how it went. Then the plan stops.
Yes. Every email has a “Change test date” link, and the plan re-times from the next day.
There are early reports of 95-minute invitations. Some describe a rebuilt, 30-minute Lab; two coaches read it as the 85-minute test plus a buffer. Treat it as unconfirmed and prepare for the longer Lab.
Your test date is the only deadline on this page.
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