What is 3BV in Minesweeper? Understanding Efficiency in Speedrunning

If you've spent time in the Minesweeper speedrunning world, you've probably seen the term "3BV" thrown around. But what does it actually mean? And why do serious players care so much about it? Let's break it down in plain English.

What is 3BV?

3BV stands for "Bechtel's Board Benchmark Value." It's a number that tells you the minimum number of clicks needed to solve a Minesweeper board. That's really all it is. Every board has a 3BV score, and that score is fixed the moment the mines are placed.

So if a board has a 3BV of 50, a perfect player could clear it in just 50 clicks. No wasted moves. No extra flags. Just 50 clicks and done.

How is 3BV Calculated?

Here's the thing: the calculation is actually pretty simple once you understand two ideas.

First, there are openings. An opening is a blank area with no number. When you click one blank cell, the whole connected blank area opens up automatically, along with the numbered cells around its border. That whole chain counts as just 1 click toward your 3BV score.

Second, there are isolated numbers. These are numbered cells that aren't next to any blank area. Each one of those counts as 1 click on its own.

So 3BV = number of openings + number of isolated numbers. Add those two together and you have the board's 3BV. Easy.

Why Does 3BV Matter for Speedrunning?

Here's where it gets interesting. Two players can beat Expert mode in the same time, but one of them had an easier board. That doesn't feel fair to compare, right?

That's the problem 3BV solves. Instead of just looking at raw time, speedrunners use a stat called 3BV/s, which stands for 3BV per second. It measures how many minimum clicks you completed every second.

So if you clear a board with a 3BV of 150 in 30 seconds, your 3BV/s is 5.0. Another player clears a board with a 3BV of 100 in 25 seconds, and their 3BV/s is 4.0. Even though that second player was faster by clock time, you were actually more efficient.

And that's the whole point. 3BV/s gives you a fair way to compare skill across different boards. It's the difference between measuring luck and measuring ability.

Typical 3BV Ranges by Difficulty

As you can see, Expert boards have a wide range. A lucky Expert board might have a 3BV of 100, while a tough one might hit 200 or more. That's a huge difference in how long the game takes.

How Do Players Use 3BV to Get Better?

Knowing your 3BV/s average over many games helps you track real improvement. Your raw times will bounce around depending on the board you get. But your 3BV/s tells the truth about your skill level.

Top players on the leaderboard don't just chase fast times. They track their 3BV/s to know if they're actually improving or just getting lucky boards.

Improving your 3BV/s usually comes down to two things: clicking faster and wasting fewer clicks. Techniques like chording help a lot here. Check out our learn chording to see how double-clicking can cut clicks out of your game. Some players also use no-flag play to skip flag clicks entirely and push their 3BV/s higher.

Want to put this into practice? You can play minesweeper right now and start paying attention to your stats after each game. If you want to track your 3BV/s over time and see how you stack up, join now and your stats get saved automatically.

Once you start thinking in 3BV, the game opens up in a whole new way. You stop caring so much about the clock and start caring about playing clean, efficient Minesweeper. That's when you know you're really getting good.