APPROVED BY EX-MCKINSEY
& EX-BCG CONSULTANTS

A solution to McKinsey's recruitment puzzles — eliminate the guesswork.

A complete toolkit for the trickiest consulting assessments. The Ecosystem Solver derives the optimum food chain. The Sea Wolf Solver walks you through microbe selection across three contamination sites — set filters, categorize, build prospects, and pick the final three. The Sea Wolf simulator and Redrock simulator give you the most realistic McKinsey experience possible, and the BCG Quantitative Reasoning simulation recreates BCG's 40-minute numeracy test. One fair price for three runs.

Get access — from £10 See pricing
Pay-per-use · 3 runs per product · no subscription Runs entirely in your browser

Optimum food chain · example output

🔒 Single-use pay-per-use access ⚡ Instant results from your data 🛡️ No data leaves your device 🏆 Most authentic simulation experience & scoring
How it works

Two solvers, one disciplined approach.

Each McKinsey Solve game rewards a structured, repeatable method. Our solvers implement the exact selection logic you'd do by hand — instantly and reproducibly — so you arrive at the optimal answer every time.

1

Enter your producers

Drop in the producer species from your case: name, calories provided, min/max depth, and min/max temperature. The solver groups them by environment and finds the cell with the highest total calorie yield.

Optimal starting location
2

Build the species matrix

Your locked-in producers are pre-filled (calories required = 0). Add the remaining species with their calories provided and required, then tick which species eat which. A clear matrix, no spreadsheet gymnastics.

Producers locked in
3

Get the optimum chain

The solver sorts species by calories provided and greedily builds the longest viable 8-species chain, choosing the best prey for each predator and tracking remaining calories as it goes.

Optimum food chain
What's inside

Focused reliable tools, not a spreadsheet template.

No fragile macros, no hidden columns, no risk of breaking the case workbook. Just clean interfaces that run the exact selection logic you'd do by hand — instantly and reproducibly — for both the Ecosystem and Sea Wolf tasks.

  • ◈

    Optimal food chain builder

    Locks in the highest-calorie producer set, then greedily builds the longest viable 8-species food chain — accounting for calories consumed at every link.

  • 🦠

    100% success rate in microbe selection in Sea Wolf

    Trait filters, prospect scoring and the optimal-three auto-pick reproduce the exact selection logic the game rewards — every time, across all three sites.

  • 📊

    Prepare for the real thing with the most accurate McKinsey solve simulations available

    A timed, like-for-like simulator of both Sea Wolf and Redrock — same phases, same sections, same prompts, same in-game tools, same pressure, full scoring at the finish.

  • ↻

    Re-runnable within your paid solve window

    Tweak inputs and re-solve as many times as you like within your paid solve window — perfect for drilling a case until it's second nature.

SpeciesCal. providedCal. requiredEats
Algae3200producer
Kelp2800producer
Shrimp14090Algae
Cod220150Shrimp
Seal400260Cod
Illustrative snippet · full matrix supports up to 8 chain positions.
Live walkthrough

Watch the whole simulation play out.

A full simulation end-to-end — every phase from start to finish. Tap any frame to pause, or let the loop run.

acethesolve.com/seawolfsimulation — Sea Wolf simulation
Sea Wolf demo simulation walkthrough, animated through profile, categorise, prospects and final selection phases
Phase 1Profile — set global traits and attribute labels.

Just like the real thing

4
distinct phases per site
3
sites solved back-to-back
10
microbes routed per site
Get simulation access — £10 Open the Sea Wolf Solver
acethesolve.com/redrocksimulation — Redrock simulation
Redrock demo simulation walkthrough, animated through investigation, analysis, report and cases phases
InvestigationIdentify and collect key data points in the Research Journal.

Just like the real thing

4
stages per study
6
timed case questions
35
minutes total
Get simulation access — £15 Open the Redrock Simulation
From recent candidates

What people said after their assessment.

Real reviews from buyers who used the solvers and simulators to prepare for their McKinsey Solve assessment.

★★★★★ 4.9 average · 671 verified reviews 🌿 Ecosystem · 4.9 (312) 🦠 Sea Wolf · 4.8 (198) 📊 Sea Wolf Simulation · 4.8 (53) 🏔️ Redrock Simulation · 4.9 (108)
JM
James M.
MBA candidate · INSEAD · final round
★★★★★

I'd already failed the Ecosystem game once before my MBA by guessing the producers. Ran the solver on my second attempt... it flagged something I was completely missing and the food chain came out to 8 species and complete/sustainable. Got the email inviting me back the week after.

AR
Aisha R.
Strategy consultant · London
★★★★★

The Sea Wolf solver saved me on Site 2 — I kept picking the wrong microbe because I wasn't weighting the trait priority correctly. Seeing the prospect ranking update as I typed made it obvious which one was actually best. Worth the £10 on its own.

DK
David K.
Engineering graduate · Cambridge
★★★★☆

Honestly skeptical at first — thought it'd be some vague "framework." It's not. The producer-selection logic is genuinely how the game works. Took me about 4 minutes to punch in the table and get the optimal set back. Docked one star only because I had to read the guide first.

SP
Sofia P.
Redrock applicant · 2026 intake
★★★★★

Bought the bundle the night before my assessment. Didn't expect much for Sea Wolf but the categorization step clicked once I saw it laid out. Finished both games with time to spare — normally I'm the one rushing the last screen.

TW
Thomas W.
Career switcher · ex-engineer
★★★★★

I'm not from a business background so the food-chain calorie math was doing my head in. Plug in the matrix, mark who eats who, and the chain just appears. The bit where it subtracts calories-required at each link is the part I kept getting wrong by hand.

LN
Lena N.
Undergrad · target school
★★★★☆

Used it purely for practice since I had a mock coming up. The output matches what the real game wants — longest viable chain, producers placed, calories positive at every level. My only gripe is I wish you could save a session and come back, but for £10 I get why it's single-use.

Reviews reflect individual experiences. The solvers are preparation tools and are not affiliated with McKinsey & Company.

Pricing

One solve. One fair price.

Pay-per-use means you only pay when you actually need to solve a case. No subscriptions, no recurring billing, no surprises. Bundle the McKinsey tools and save £15 — BCG Quant is sold separately.

🌿
Ecosystem
★★★★★ 4.91 · 312 reviews
£10 / 3 runs

Full access to the Ecosystem Solver — 3 runs.

  • Optimal starting location & producer set
  • Full species matrix with eats-marks
  • Optimum 8-species food-chain output
  • 3 runs included · re-run within your session
Unlock Ecosystem →

Runs in your browser · data never leaves your device

🦠
Sea Wolf
★★★★★ 4.86 · 198 reviews
£10 / 3 runs

Full access to the Sea Wolf Solver — 3 runs.

  • Set filters & species categorization
  • Prospect building & final selection
  • Optimal 3-microbe picks per site
  • All three contamination sites in one run
Unlock Sea Wolf →

Runs in your browser · data never leaves your device

📊
Sea Wolf Simulation
★★★★★ 4.88 · 53 reviews
£10 / 3 runs

Run the full timed Sea Wolf simulation — 3 runs.

  • Full 3-site, 30-minute simulation
  • Profile, categorize, prospects, final pick
  • Scored end-to-end like the real assessment
  • 3 runs included · buy once, run three times
Unlock Simulation →

See the walkthrough above · £10 for 3 runs

🏔️
Redrock Simulation
★★★★★ 4.90 · 41 reviews
£15 / 3 runs

Run the full timed Redrock Island assessment — 3 runs.

  • Full 35-minute Investigation → Analysis → Report flow
  • Research Journal, calculator & drag-and-drop data
  • Six scored Case stages
  • 3 runs included · buy once, run three times
Unlock Redrock →

Mirrors the real McKinsey Redrock assessment · £15 for 3 runs

🧮
BCG Quant Simulation
★★★★★ 4.87 · 29 reviews
£5 / 3 attempts

Run the full timed BCG Quantitative Reasoning test — 3 attempts.

  • 40-minute, 20-question timed simulation
  • Question bank from real BCG assessments
  • Flag-for-review, previous/next navigation
  • 3 attempts included · scored breakdown at the end
Unlock BCG Quant →

Popular for BCG London experienced & MBA hires · £5 for 3 attempts

⬡
McKinsey bundle
★★★★★ 4.89 · 604 reviews
£30 / bundle

3 runs of every McKinsey tool — both solvers + both simulations.

  • Ecosystem Solver — 3 runs
  • Sea Wolf Solver — 3 runs
  • Sea Wolf Simulation — 3 runs
  • Redrock Simulation — 3 runs
  • Everything runs in your browser
Unlock the McKinsey bundle →

Best value · save £15 vs buying separately · BCG Quant sold separately

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Already purchased?

Return to your existing session and pick up where you left off — no need to buy again.

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Your privacy

Everything runs in your browser. Your case data never touches a server — not even ours.

  • Zero data uploaded to the cloud
  • No account or sign-up required
  • Instant results from your inputs
  • Works offline after page load
  • Single payment and no recurring subscriptions to worry about

Your assessment data stays on your device · always

Prices in GBP. International buyers see their local currency automatically at Stripe checkout.

FAQ

Questions, answered.

Is this affiliated with McKinsey?

No. Ace the Solve is a service providing independent study aids for the McKinsey Solve ecosystem — it is not endorsed by or affiliated with McKinsey & Company, BCG or any other commercial entity unless otherwise explicitly written.

How does the paywall work?

After checkout you receive an access token with a personalised return link. Open a solver or simulator, confirm the "enter & consume run" prompt, and one run is consumed server-side — you can then re-run within that session as many times as you like. Every product (Ecosystem Solver, Sea Wolf Solver, Sea Wolf Simulation, Redrock Simulation, BCG Quant Simulation) gives you three runs per purchase. If you buy the McKinsey bundle, you get three runs of all four McKinsey tools; BCG Quant is sold separately. Consumed runs cannot be reused.

Does my data leave my browser?

No, data privacy is a big concern and as a candidate you should feel confident that your e-mail, name and any other details will remain private. We do not create user accounts and the entire solver runs client-side. Your assessment data is never sent to a server.

How long will I have access to the solver for?

There's no time limit — your token stays valid until you use it. Once you confirm entry to a solver (or start a simulation run), that run is consumed, but you can re-run within the open session as often as you like. Tokens don't expire, so you can buy now and solve later.

Stop guessing. Start solving.

One payment, one solve, one optimal answer. Get instant access to the Ecosystem Solver, the Sea Wolf Solver, the timed simulation, or all three.

Get access — from £10 →