How Speedrunners Use 3BV/s in Minesweeper

If you've spent time in the Minesweeper speedrunning world, you've seen the term "3BV" thrown around constantly. But what does it actually mean, and why do serious players obsess over it? More importantly, how do the fastest runners use 3BV and its cousin 3BV/s to train smarter and post record times? Let's break it all 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 left-clicks needed to clear a Minesweeper board without using any flags or chords. That's really all it is. Every board has a fixed 3BV the moment its mines are placed, and nothing you do during the game changes it.

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, 50 clicks and done. Your actual click count is almost always higher, because humans flag, double-check, and occasionally misclick. The gap between your clicks and the board's 3BV is wasted motion, and closing that gap is a core part of getting faster.

Key Takeaway: 3BV is the minimum number of clicks required to clear a board. It's set by the board layout, not by how you play.

How is 3BV Calculated?

The calculation is simple once you understand two ideas.

First, there are openings. An opening is a connected blank region (cells with zero adjacent mines). When you click any one cell in that region, the whole blank area flood-fills open automatically, along with the numbered cells bordering it. That entire chain counts as just 1 click toward 3BV, no matter how big it is.

Second, there are non-opening numbered cells: numbered squares that don't border any blank region. Each of those must be clicked individually, so each counts as 1 click.

Put them together:

3BV = (number of openings) + (number of numbered cells not touching any opening)

Add those two together and you have the board's 3BV. The reason this connects to flood fill is exactly what we cover in our guide to how numbers and adjacency work, and our efficiency help page shows it on real boards.

Tip: Boards with lots of large openings have lower 3BV, which means fewer required clicks and faster potential times. If a board opens up wide early, that's a green light for a fast run.

What is 3BV/s, and Why Speedrunners Live by It

Here's where it gets interesting for speedrunning. Two players can beat expert mode in the same time, but one had an easier, lower-3BV board. Comparing their raw times isn't really fair.

That's the problem 3BV/s solves. Instead of judging by the clock alone, speedrunners track 3BV per second: how many required clicks you completed each second. The formula is:

3BV/s = board 3BV / time in seconds

Say you clear a 150-3BV board in 30 seconds; your 3BV/s is 5.0. Another player clears a 100-3BV board in 25 seconds for a 3BV/s of 4.0. Even though their clock time was faster, you were more efficient. That's the whole point: 3BV/s measures ability instead of luck, and it's the number elite players truly compete on.

Worked Example

Let's make it concrete. Imagine a small board that breaks down like this:

Element	Count	Clicks toward 3BV
Openings (blank regions)	3	3
Isolated numbered cells	9	9
Total 3BV		12

If you clear that board in 8 seconds, your 3BV/s is 12 / 8 = 1.5. If you tighten up and finish the same kind of board in 6 seconds, you jump to 2.0 3BV/s, a 33% efficiency gain, even though you only shaved two seconds. That's why runners chase the rate, not just the clock.

Typical 3BV Ranges by Difficulty

Difficulty	Typical 3BV Range	Notes
Beginner	3 to 15	Tiny boards, low click count
Intermediate	30 to 70	More variation in layout
Expert	100 to 200+	Wide range; boards vary a lot

Expert boards have a huge range. A lucky expert board might sit near 100, while a dense one tops 200, a massive difference in how many clicks the run demands. Top runners often "reset" away from very high-3BV boards when chasing a personal best, because a lower-3BV board gives a faster time at the same skill level.

How Speedrunners Use 3BV to Get Faster

Tracking your 3BV/s average over many games is the single most honest measure of improvement. Your raw times bounce around with board luck, but your average 3BV/s tells the truth about your skill. Top players on the leaderboard don't just chase fast clock times; they monitor their 3BV/s to know whether they're genuinely improving or simply drawing easy boards.

Raising your 3BV/s comes down to two levers: clicking faster and wasting fewer clicks. Two techniques dominate here:

• Chording. Once a numbered cell has all its mines flagged, a middle-click (or simultaneous left+right click) clears every remaining neighbor at once. One motion can open many cells, slashing your click count toward the 3BV floor. Our chording guide shows the technique step by step.
• Flagless (no-flag) play. Flagging costs clicks and time. Many of the fastest runners skip flags entirely and click only safe cells, which keeps total clicks closer to 3BV and pushes 3BV/s higher. See our flagless play guide to learn the style.

Pattern recognition matters too: the faster you read formations like 1-2-1 from our patterns guide, the less you hesitate, and hesitation is dead time that drags your 3BV/s down.

A Simple Training Routine

If you want a concrete plan to lift your 3BV/s, here's a routine many runners use. First, warm up on intermediate boards until your hands feel loose; cold hands cost real seconds. Second, run a block of ten games and write down the 3BV/s for each, then take the average rather than the best. The average is what actually moves as you improve, and it ignores the one lucky board that flatters your record.

Third, pick one weakness per session. Maybe your opening reads are slow, maybe you over-flag, maybe your chording timing is sloppy. Drilling a single habit beats trying to fix everything at once. Finally, review your worst run, not your best. The mistakes that cost the most time hide in the games that felt clumsy, and watching them back shows you exactly where the wasted clicks crept in. Over a few weeks this loop, measure, isolate, drill, review, is what separates a stuck plateau from steady gains on the leaderboard.

Common 3BV Mistakes

• Chasing clock times on lucky boards. A great time on a low-3BV board can mask weak fundamentals. Judge yourself by 3BV/s instead.
• Over-flagging. Every flag is a click that doesn't count toward 3BV. On timed runs, flag only when it sets up a chord.
• Hunting for openings to no end. You can't increase a board's number of openings; it's fixed. Focus on clearing the openings that exist with minimal motion.

3BV FAQ

Does flagging mines increase my 3BV?

No. 3BV is a property of the board, not your play. Flagging adds to your real click count but never changes the board's 3BV. For more, see our 3BV FAQ.

What's a good 3BV/s for expert?

Casual players often sit around 1 to 2 3BV/s on expert. Strong players reach 3 to 4, and world-class runners push well beyond that. Track your own average and aim to nudge it up over time.

How do I see a board's 3BV?

Many trackers and our own stats show it after each game. Our efficiency page explains how to read it and what to do with the number.

Want to put this into practice? You can play Minesweeper right now and start watching your stats after every game. Pay attention to 3BV/s, not just the clock, and check your standing on the rankings. Once you start thinking in 3BV, the game opens up in a whole new way. You stop chasing the timer and start playing clean, efficient Minesweeper, and that's exactly when you start getting genuinely fast.