Excel Food Chain Solver for McKinsey Ecosystem Game

15 total reviews

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START YOUR FREE TEST BELOW 👇

Get ready to crack McKinsey’s Ecosystem Building game with an Excel solver engineered for speed, clarity, and flawless logic. This tool helps you evaluate all the producers and animals available and build a sustainable 8-specie food chain — all in under 12 minutes.

✅ Evaluates calorie flows, terrain compatibility, and food-chain relationships automatically

✅ Tests all species combinations to find a stable ecosystem that meets all constraints

✅ Streamlined interface that focuses only on the inputs that matter

✅ Trusted by hundreds of candidates preparing for the McKinsey Solve Game

Looking to go beyond a solver? This tool pairs perfectly with our Interactive Ecosystem Simulations, which mirror the real McKinsey scenario with species selection, calorie logic, and environmental constraints.

Nothing else on the market matches this level of accuracy, transparency, and speed. Walk into the assessment sharp, structured, and fully in control.

How to use

Purchase this product
Receive instructions via email and fill out the short form
Receive the Excel files automatically via email and start practicing for the McKinsey Solve Game

REQUIREMENTS

Mac or Windows laptop
Microsoft Excel 2016, 2019, 2021 or Microsoft 365

Why you should use the Ecosystem Island solver

Specialized solver tool

Access an Excel solution built specifically for the Ecosystem Building game. Analyze species, suggest viable options, and construct a balanced 8-species food chain with confidence.
Boost your performance

Train with a tool that mirrors the game’s calorie, terrain, and producer-animal logic. Join hundreds of candidates who have strengthened their Solve Game results using our resources.
Top-rated solution

Designed using deep expertise in McKinsey’s digital assessments, this solver gives you a major edge in one of the most logic-intensive modules of the Solve Game.

See the Ecosystem solver in action

What candidates say about our McKinsey PSG tools

It worth every penny. It was easy to use and helped tremendously. Within few mins, one is done. I strongly recommend it.
Tioluwani

It made my life easier and saved me a lot of time. I will recommend it to all
Magesh S.

The practice helped a lot to build up confidence for the test. The Helpdesk replied super quickly and even provided details on the solution. Highly recommend this pack! Definitely worth the money 🥳
Michelle

The excel really did beyond just solving the problem. It also taught me all the logic behind it and how it is actually work, and how to approach the problem. I got invited to interview by McKinsey!!! Highly recommended!!!
Gnwn

The solver is very detailed and very easy to navigate, in my experience I would also recommend it to others.
Lakshmanan M.

Start with the foundation

Input your producers and instantly screen for viable options

Enter the producers’ attributes — calories produced, depth/elevation, and temperature. The solver automatically highlights the producer group and location parameters which are most likely to support a sustainable food chain.

Explore producer setup

Build the food chain core

Add animals and let the solver handle any constraints

For the recommended location parameters, fill in the animals’ calories needed, calories provided, and food sources. The solver cross-checks producers and animals, validates all eating possibilities according to the official rules, and identifies which animals can coexist with your chosen producers.

Review animal options

All logic done for you

Generate a complete 8-species food chain with one click

The solver runs every viable combination and computes a fully balanced ecosystem — calories needed vs. calories produced, food-chain validity, and location fit. Instantly see the optimal mix of producers and animals for the scenario and submit your answers with confidence.

Solve optimal ecosystem