CR Simulator · fan-made Clash Royale battle simulator

A Clash Royale battle simulator with an AI that thinks 12 seconds ahead.

Build a deck from 122 cards with live-game stats — Evolutions, Heroes and Champions included — and battle an opponent that pairs a neural network trained by self-play with a look-ahead search, simulating its best moves before it plays. It runs in your browser, with a coach that suggests what you should play.

Play now Meet the AI

122Cards, plus 43 Evolutions, 18 Heroes and 8 Champions

93.75%Win rate vs the rule AI over 240 benchmark matches

3AI opponents, from rule-based to look-ahead

30Top meta decks, one click to load

cr-sim.vber-ai.com

CR Simulator deck builder with a meta deck in the Evolution, Hero and Wild slots and the opponent AI selector

01 Why it exists

Built by someone who actually plays — to test decks and to see how far a browser AI could go.

Try decks without the ladder

Test a new deck against a strong opponent without losing trophies, at any card level from 11 to 15.

A real opponent, not a script

Most fan-game bots follow fixed rules. This one learned from millions of simulated decisions and plans ahead.

Learn by watching

Turn on the coach and the same AI suggests a card and a tile for you, in real time.

02 Features

Real screenshots of the running game. The battle shots are a live AI-versus-AI match.

Deck builder

Every card, with real stats

Evolutions, Heroes, Champions and tower troops

What it does — drag cards into your deck with the real slot rules: slot 1 Evolution, slot 2 Hero, slot 3 Wild. Load one of 30 top meta decks, set card levels for both sides and pick your tower troop.

Card stats from live game data, client 16.402.19 (content update 6 October 2026)
43 Evolutions and 18 Heroes, each with its named one-use ability; 8 Champions
Tower Princess, Cannoneer, Dagger Duchess and Royal Chef
Three opponents: Trained AI + look-ahead (strongest), Trained AI, or Rule AI

Mid-battle with an "Enemy played" banner

Battle engine

The real rules, tick by tick

3:00 plus overtime, double and triple elixir, sudden death

What it does — an 18×30-tile arena with the river, bridges, pocket placement after a tower falls, a dormant King Tower that wakes when hit, and 10 kinds of spell — from Log rolls to Graveyard spawns.

Elixir every 2.8 s, ×2 in the last minute and ×3 in the final overtime minute
Targeting, splash, chain lightning, knockback, slow, stun, rage, reflect and healing
Ground units choose the cheaper bridge and keep right when meeting head-on
Placement rules shared by you, the preview grid, the AI and the coach

Coach

See what the AI would play

A card and a tile, suggested in real time

What it does — turn on 🎓 and the trained AI runs its own look-ahead for your side, highlighting a card in your hand and the tile to play it on.

Runs on a 5 ms-per-frame budget so the game never stutters
Keyboard play: 1–4 select a card, E uses the ability, Esc cancels
Hero and Champion ability button with cooldowns
Victory, defeat or draw — by King Tower, sudden death, tiebreak or crowns

03 The AI, measured

We measured it: the same 240 matches across all 30 meta decks, with seats swapped so neither side gets the better deck.

Opponent	Win rate vs Rule AI
Trained AI, network only	42.9%	Plays on instinct
+ 5 s look-ahead	78.8%	Thinks before it plays
+ 8 s look-ahead	85.4%
+ 12 s look-ahead (the one you play)	93.75%	2.2 crowns per match on average
Latest version vs the 12 s AI	63.3%	Still getting stronger

Want a gentler game? Pick "Trained AI (network only)" or "Rule AI" in the deck builder.

04 Everything included

Free, in your browser, with nothing to install.

122

Every card

Troops, spells and buildings with live-game stats.

EVO

Evolutions & Heroes

43 Evolutions, 18 Heroes and 8 Champions, with their abilities.

Look-ahead AI

Simulates its best options before every play.

Coach

The AI suggests your next card and where to put it.

Top meta decks

Load the strongest decks in one click.

11–15

Card levels

Set levels for both sides, Elite included.

×3

Real match rules

Double and triple elixir, overtime and sudden death.

Tower troops

Tower Princess, Cannoneer, Dagger Duchess and Royal Chef.

05 FAQ

Is this the official game?

No. It's an educational, non-commercial fan project, not affiliated with, endorsed or sponsored by Supercell. Clash Royale names, art and sounds are © Supercell; the simulator code is Apache-2.0.

Is it free?

Yes. Open the page and play — no download and no account.

How strong is the AI?

Its look-ahead search won 93.75% of 240 benchmark matches against the built-in rule AI, and the current version beats that search 63% of the time head-to-head.

Can I pick an easier opponent?

Yes — choose Trained AI (network only) or the Rule AI in the deck builder.

How accurate are the card stats?

They come from decoded live game data for client 16.402.19, with wiki corrections and a few hand calibrations. It's a simulator, so expect small differences from the real game.

Does it work on a phone?

The battle screen is portrait and scales to fit your window; a desktop browser is the most comfortable.

Think you can beat it.

Load a meta deck, pick the strongest AI and find out.

Play CR Simulator → Ask about AI projects