Master Lock 1590D – All Possible 3 Letter Words

The Master Lock 1590D isn’t an overwhelmingly common escape room lock. (That’s probably a good thing for reasons that I discuss below). That said, it is a strange and interesting device that does show up from time to time.

Blue alphanumeric locker-style padlock.

Since it is commercially available and does show up, I decided to run an analysis against it. In doing so, I learned some nifty things.

The results of the analysis are here. I encourage you, however, to continue reading, as this analysis turned out a bit different from previous ones (this one and this one.)

Letter Distribution

Unlike the previous letter locks that we’ve analyzed, the Master Lock 1590D does not have multiple disks with individual letter distributions. Instead, the 1590D functions like a traditional locker lock. All of its letters are available at once.

The distribution is:

A D E H J L N R S T and the numbers 0 through 10.

There is one interesting thing to note about this lock before reviewing the word permutations.

Letters may be repeated:

There was nothing in the lock’s documentation, nor did I find anything online… but when I attempted to input repeat letters into the lock, it accepted them. “AAA” was a valid combination.

This was a relief because I was pretty certain that I was going to break the lock when I tried it.

Blue alphanumeric locker-style padlock open with a reset key sitting beside it.
Once opened, the lock may be reset by inserting this plastic key into the shackle hole.

What Words Can This Distribution Generate?

We ran two separate analyses.

Analysis 1: Letters Only (Tab 1)

This analysis only used the actual letters on the lock: A D E H J L N R S T

The results generated 59 high-value words.

Analysis 2: Letters & Number Substitutions (Tab 2)

This analysis used the actual letters , plus O, I, Z, G, B (as represented by the letters 0, 1, 2, 6, 8).

The results generated 207 high value words.

Blue alphanumeric locker-style padlock open with a reset key inserted.
It can be reset to a 3-digit permutation.

Analysis Methodology

Once again, Rich Bragg (of Guinness Record, Enthusiast Choice Awards, & ClueKeeper fame) helped conduct this analysis. The mechanics of the analysis were explained in the original lock analysis post… so I’m not going to rehash them here. 

There was one significant differences from the first analysis:

I asked Rich to run the analysis twice, once using only the actual letters, and a second time substituting letters that look like numbers. These tabs are running across the bottom of the spreadsheet.

5 Observations

1. The fact that the 1590D accepts repeated letters really surprised me. This greatly opened up opportunities for making words.

2. Word options at 3 letters are minimal. This isn’t really a surprise.

3. The addition of a few extra numbers as letter substitutions expanded the word pool dramatically.

4. If you look in the right two columns, you’ll find a ton of 3-letter abbreviations. Government agencies (DOJ), stock symbols (JNJ), nicknames (J Lo), and fictional organizations (JLA) seemed interesting and potentially useful. The right most column is far more useful for this lock than for some of the larger locks that we’ve previously analyzed.

5. Master Lock’s commitment to including the letter “J” in their word locks continues to bewilder me as it is not useful for making words. The only reason that I can think of is for making people’s initials, as “J” is a common first letter in names.

Caution

I have found that players are generally confused about how to operate this lock.

In my opinion, locker-style locks are a less-than-stellar option for escape rooms. I think they should be avoided most of the time. The same goes for the 1590D.

My opinions notwithstanding, I know that this lock will get used in escape rooms and in classroom games, so I offer this analysis.

WordLock – All Possible 4 & 5 Letter Words

I recently published an analysis on the Master Lock 4 letter combination locks. They have an unusual letter distribution and I was curious how many English words could be generated with those locks. It turned out that those Master Locks could create a lot more words than I had anticipated.

In light of the popularity of that post I once again worked with Rich Bragg of ClueKeeper to run the same analysis on the popular WordLock PL-004 5-Dial.

This lock seems to have fewer clichéd words, but there are a few that pop up a little too often including:

  • LASER
  • DEATH
  • FELON
  • BOOK(S)

A 5 letter WordLock closed, the word "Books" appearing.

Letter Distribution

This analysis is focused on the most current 5 disk WordLock model, the PL-004. There are 3 older models with somewhat different letter distributions and WordLock has other 4 disk products. 

The fixed-disk WordLock uses the following letter configuration:

Disk 1: L S W B P F M D T A

Disk 2: A P O R I L C E T N

Disk 3: S E R I L A N U T O

Disk 4: E L D A O S K N R T

Disk 5: R L S N T H Y D _ E

There are two particularly interesting things about this letter distribution.

First, the blank spot on the fifth disk (represented above with an underscore) cleverly allows the WordLock to represent 4 or 5 letter words.

Second, the lock has asymmetrical disks that, when all aligned, defaults 7 of the 10 lines of the lock into words:

  • WORDS
  • SPELL
  • LASER
  • BRIAN … if you consider a name to be a word
  • PILOT
  • FLASH
  • ANOTE … while it does have a definition, this more looks like a word than is a word

While the remaining three lines are gibberish, it’s still a nifty and thoughtful feature as the lock looks cool with all of those words on its face.

A 5 letter WordLock closed, the word "Spell" appearing.

What Words Can This Distribution Generate?

Here’s the spreadsheet. The left-most column contains 1,652 core English words. These are the best words that the analysis found. The further right you move, the less useful the words generally are (and the farthest right is mostly nonsense).

Analysis Methodology & Column Explanation

Absolutely everything about this analysis and its outputs conforms to the same information presented in the last letter lock analysis, so I won’t rehash it. It’s on the Master Lock post if you’re interested.

Odd Letter Distribution Hypothesis

After publishing the last analysis some members of the room escape community proposed a hypothesis about the odd letter distribution on those Master Locks:

It seemed like Master Lock may have been trying to make it impossible to spell curse words.

This seems like a valid answer for both Master Lock and WordLock’s letter selection. I cannot prove this one way or another, but you cannot generate the most popular American English swear words with these locks… so that’s probably not a coincidence.

Nevertheless, sifting through the wordlist revealed a few “vulgar” or degrading words… and I’m including them because my inner 10 year-old thinks this list is hilarious:

Vulgar Words: Proceed With Caution

ANAL, ANUS, BALLS, BONER, DORK, PANSY, SISSY, and PENAL (That last one isn’t at all vulgar, but it sure feels like it should be.) You can also generate the word MOIST… which apparently is a word that a lot of people hate.

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There are also TONS of innuendo-y words that I didn’t include… because I’m an adult.

WordLock Word List