The Rule You Add Is the Game You Get

I want to talk about something that sounds simple but has massive implications for how you run your practices.

A rule. One rule. And what it does to the game your players actually play.

In 2012, researchers Almeida, Ferreira, and Volossovitch published a study in The Open Sports Sciences Journal that I keep coming back to. They took eight U-13 players, split them into two teams, and put them through the same 3v3 small-sided game under three different conditions: free-form (no extra rules), two touches maximum, and four passes required before a shot.

Same players. Same field size. Same game format. Three completely different rule sets. And the results? Three completely different games.

Here's what they found.

Free-Form: The Individualists

When there were no constraints, players defaulted to individual expression. More 1v1 duels. More decisions to take people on rather than play through. Shorter passing sequences — not because the players couldn't pass, but because they didn't need to. The ball moved freely, attacks developed naturally, and the game looked good. But it also looked a lot like players solving problems for themselves rather than together.

Free-form produced the most "individualistic approach," as the researchers put it. And there's value in that — it's where you see who can genuinely take someone on, who reads space intuitively, who competes. But it's also where some players hide, because there's no structural pressure to connect.

Two Touches: The Fast Game

The two-touch rule produced the shortest possessions, the fewest ball touches, and the fastest collective rhythm. Players had to think before the ball arrived. They had to move to give angles. The game sped up — which sounds like a problem, but actually mirrors professional soccer more closely than you'd expect. Research by Dellal et al. (2011) found that elite players at professional level average close to two touches per possession anyway. So in a way, the two-touch game is the most game-realistic constraint in this study.

What was most interesting to me: the two-touch rule also produced the most offensive sequences (106, versus 93 free-form and only 67 with four passes). Faster play meant more transitions, more opportunities, more exposure to game moments. And despite being the condition with the fewest touches per player, it actually produced the most goals.

The catch? It kills 1v1 dribbling development. If you run two-touch all session, every session, your players lose the conditions they need to practice beating people. As the researchers note directly: "the two-touches playing rule does not provide to youngsters the best circumstances to develop the dribbling actions useful in 1v1 situations."

This is the unintended consequence I talk about in my book. The constraint you choose shapes behavior — and not always in the direction you planned.

Four Passes to Score: The Collective Game

This one fascinated me most. The four-pass rule produced the longest possessions (over 20 seconds on average, compared to 9.5 seconds for two-touch), the most passes, the most players involved in each sequence, and — here's the counterintuitive part — the fewest shots. But when players did shoot? They scored at a rate of 53%, versus 25% free-form and 31% two-touch.

Four passes to score forced teams to find better quality chances. It demanded collective involvement. You couldn't score without working together first. And the data showed it: more players involved per sequence, more passes per player, more genuine team play in the attacking phase.

But it also produced more variability, more mistakes, and ultimately fewer shots on goal. When you force teams to build before they can shoot, the game slows, defenses organize, and free space disappears. Players are working against an organized defensive structure almost every time. That's hard. And it shows in the numbers.

So What Does This Mean for You?

The point isn't that one rule is better than the others. They each do something different. That's exactly the point.

Two-touch makes your game faster and more realistic for older players, but it shouldn't be your default. Free-form gives players the chance to self-organize, compete individually, and express themselves — which matters, especially at younger ages. Four passes develops collective play and teaches teams to be patient and connected in attack. But overuse it, and you're training a game that doesn't quite exist.

I've spoken about this on the Heads and Volleys Podcast (Ep. 48, Constraints on Practice and Players, with Ben Bell) and written about it in my book 1v1's Outside the Box. The principle is the same every time: every constraint you add to a practice has consequences. Some intended, some not. A four-goal game produces more turns — Pulling, Twitchen, and Pettefer (2016) confirmed that. An end zone rewards line-breaking runs. A pass count constrains shot timing and can force your striker to delay finishing a clear chance.

The researchers put it well: "The modification of game rules should be carefully pondered and applied for specific purposes, when planning youth soccer training sessions."

Not randomly. Not habitually. With purpose.

Before you add a constraint to your next session, ask yourself three questions:

What behavior am I trying to develop? What does this rule actually encourage players to do? And what does it accidentally discourage?

If you can answer all three clearly, you're planning well. If you're adding it because it looked organized or kept the session moving — that's worth revisiting.

The rule you add is the game you get. Make sure it's the game you want.

Almeida, C.H., Ferreira, A.P., Volossovitch, A. (2012). Manipulating Task Constraints in Small-Sided Soccer Games: Performance Analysis and Practical Implications. The Open Sports Sciences Journal, 5, 174-180.

Dellal, A., Chamari, K., Owen, A.L., Wong, D.P., Lago-Penas, C., Hill-Haas, S. (2011). Influence of technical instructions on the physiological and physical demands of small-sided soccer games. European Journal of Sport Science, 11(5), 341-6.

Pulling, C., Twitchen, A., Pettefer, C. (2016). Goal Format in Small-Sided Soccer Games: Technical Actions and Offensive Scenarios of Prepubescent Players. Sports, 4(4), 53.

1v1's Outside the Box. LeeDunneSoccer.

Ep. 48 Constraints on Practice and Players. Heads and Volleys Podcast.

@LeeDunneSoccer