Optimal solutions for Phase 3 and Phase 4
Most Excel solvers optimise Treatment only. This one covers Prospecting pool selection as well, and shows the combination it arrived at rather than just a score.

Compute the optimal Prospecting and Treatment combinations instantly, and learn the constraint logic behind them. Runs in your browser: no Excel file, no macros.
5.0·49 reviews·From £39
The Solver is a study tool. You will not have it on test day, which is the point of practising with it now.
Search results for “sea wolf excel solver” usually point at macro-enabled spreadsheets. Those files carry malware risk and often optimise Treatment only, not Prospecting. This runs in the browser, with no download and no macros, and covers both phases.
Use it during practice to learn the patterns. On test day you will not have a solver, so the goal is to stop needing it.
A short walkthrough: entering a site, reading the constraint analysis, and arriving at the optimal combination.
Every feature exists to make the reasoning visible, so practice builds intuition instead of dependence.
Most Excel solvers optimise Treatment only. This one covers Prospecting pool selection as well, and shows the combination it arrived at rather than just a score.

When several combinations score the same, the solver picks the most viable one and shows the constraint analysis behind that choice, so you learn the reasoning rather than copying an answer.

Enter species and constraints without reaching for the mouse. The point is to make the input fast enough that you can run many scenarios in one practice session.

Step back through your inputs instead of rebuilding a scenario from scratch when you mistype a value.

Invalid entries and impossible constraint sets are caught as you type, so a wrong answer never comes from a silent input error.

No download, no macro-enabled spreadsheet, and nothing to keep up to date. The Solver opens in the browser next to the simulators.

Guides on the Sea Wolf scoring logic the Solver is built around.
Which solvers exist, how they differ, and what to look for in 2026.
Read article →How to pinpoint the final treatment quickly, with the arithmetic shortcuts that save time.
Read article →Browse every post on Sea Wolf strategy, solvers and preparation.
View all posts →Select the package that fits your preparation needs. Every package includes 2 weeks of access, except McKinsey + Bain Ultimate, which runs for 2 months.
You only get one attempt at the McKinsey Solve Games. This costs less than a single interview coaching session, and prepares you for the actual filter.
Every McKinsey Solve game and the full Bain Assessment, for two months.
One-time · 2-month access
Backed by our 75% performance guarantee and 50% Redrock format guarantee.
Every Solve game, the Sea Wolf Solver, and both guarantees.
One-time · 2-week access
5.0 out of 5 from 555 reviews
Backed by our 100% performance guarantee and 50% Redrock format guarantee.
A focused three-hour plan for when your assessment is close.
One-time · 2-week access
4.9 out of 5 from 59 reviews
Bain's three timed aptitude tests, with a fresh question set every run.
One-time · 2-week access
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Practise with the optimal answer in front of you until the constraint patterns are obvious, then run the simulator without it.