Quoridor for Chess Players: What Carries Over and What Doesn't

If you play chess, you already have most of what Quoridor asks for. You count tempo without thinking about it. You calculate "if I go here, they go there." You know a pawn race is decided by counting, not by hoping.

You also have a few habits that will lose you your first ten games. This is a guide to both: what to keep, what to drop, and how to get good quickly.

The rules, in chess terms

• Your whole army is one pawn. It starts in the middle of your back rank and moves one square at a time: up, down, left or right. Think of a king that cannot move diagonally.
• The only way to win is to promote. First pawn to reach any square on the far side of the board wins. There is no checkmate and nothing is ever captured.
• Instead of capturing, you build. Each player has ten walls. A wall is two squares long and drops into the grooves between squares to lengthen your opponent's route. Walls are permanent, and you may never seal a pawn in completely; a path to the goal must always exist.
• A turn is one thing: step your pawn, or place a wall.
• Face to face, you jump. If the two pawns meet head-on, the one to move can jump straight over the other. If a wall or the edge of the board is behind it, the jump goes diagonally instead.

That is the whole game. The full rules take five minutes to read.

What carries over

Tempo is everything

In chess a tempo is a move you did not waste. In Quoridor that idea is the whole economy. Every wall you place is a turn your pawn stood still, so a wall only pays if it costs your opponent more steps than it cost you. A wall that adds one step to their route has cost you exactly what it cost them, and used up one of your ten walls to do it. Our strategy guide calls this spending walls like money.

Endgames are pawn races, and you already know how to count them

Once the walls are gone, Quoridor is a pure race, and you settle it the way you settle a king-and-pawn ending: count the moves each side needs, then check who is on move. The difference is that the count is exact and it is the shortest path through the maze, not a straight line.

The face-off is a kind of opposition

Step right in front of your opponent's pawn and, if nothing is behind you, they jump straight over you: two squares in one move, for free. So, much like the opposition in king-and-pawn endings, it often matters who has to step forward first. Chess players pick this up faster than anyone.

Calculation and prophylaxis

"If I wall here, where does their path go, and what does my next wall do to that?" is the same forcing-line calculation you do in chess. And the prophylactic habit of asking what your opponent wants carries over too: the wall that hurts you most is usually one they can place next turn, so look at your own route before you look at theirs.

What doesn't carry over

Attacking early

The chess instinct to develop and attack turns into placing walls on move two. It is the most common way new players lose. Early walls are easy to walk around and they never come back. The strong opening plan is usually to run first and wall later, when your opponent's route is narrow enough that one wall really hurts.

Material

Nothing is ever captured, so there is no material count. The closest thing is walls in hand, and they work like a threat in chess: a wall you have not placed yet still constrains what your opponent can safely do. Keep track of how many each side has left.

Opening preparation

Quoridor has opening ideas, but nothing like a chess repertoire, and very few players have memorised anything. With 131 legal first moves against chess's 20, you are thinking from the very first turn. If you came to Quoridor because you were tired of losing to someone's prep, this is the part you will enjoy.

Judging who is ahead

In chess, evaluating a position is the hard part. In Quoridor it is the easy part: count each pawn's shortest path home and you know exactly where the race stands. The hard part is the walls still in hand, and what they will do to those two numbers. We wrote about why that makes the game the inverse of chess.

A first-week plan

1. Learn the rules with the 30-second tutorial on the home page, or read the full rules.
2. Climb the bots. There are ten of them, weakest to strongest. Move up when you beat one twice in a row.
3. Review every game. After each game, open the engine review. It grades every move as Great, Best, Good, Inaccurate or Terrible and gives you an accuracy score, just like a chess game review. Look for your first Inaccurate wall; it is often where the game turned.
4. Do the puzzles. Each puzzle is a real endgame with exactly one winning move, proven by a solver. They train the counting that decides close games. There is a new Daily Challenge every day.
5. Play ranked. Ranked games are three minutes a side, and every new account starts at 500 Elo. Nobody you know has a rating in this yet, so it is a clean ladder.

Frequently asked questions

Do chess skills help in Quoridor?

Yes. Counting tempo, calculating forcing lines, and racing pawns the way you count a king-and-pawn ending all carry straight over. What does not carry over is the instinct to attack early: in Quoridor every wall costs you a step and never comes back.

Is Quoridor harder than chess?

It has more possible games: about 10^162, against about 10^123 for chess, and 131 legal first moves against chess's 20. Whether it is harder to play well is a different question, but there is far less opening theory to learn before you can play it properly.

Where can I play Quoridor online?

On Quoridors, free in your browser: eleven bots from weakest to strongest, games with friends by invite link or on one device, ranked games with an Elo rating, puzzles, and a review that grades every move.