Thanks to the AD&D Random Dungeon Generator I wrote https://github.com/bluetyson/ADnD1e-Random-Dungeon-Generator, I can parallelise, so doing this only takes less than a minute.
The basic random walk theory these talk is ‘Ahead’ is the y positive direction and always follow exits – e.g. stairs down (and can go up sometimes too).
The first 1000 dungeons I have done with 10 Periodic Checks as the DMG table calls them. e.g. a roll on the main table.
Here’s a summary :-
https://docs.google.com/spreadsheets/d/1kpZhtAO4cLtyLnh6bCCRVdigOL8jbjAFJ6CFyEZ2cX8/edit?usp=sharing





Here you can have the situation if you find an empy room it can have secret doors – beyond which are more rooms, which can have secret doors if empty – I have it so it follows that stack down, then goes back – e.g. Rooms are the interesting thing.
So with 10 checks, a couple of rooms is likely.
In fact, here are the medians for this batch of 1000:
monster_xp                            0.0
wm_xp                                 0.0
monster_total                         0.0
wm_total                              0.0
traps                                 1.0
rooms                                 2.0
total_treasure_copper                 0.0
total_treasure_silver                 0.0
total_treasure_electrum               0.0
total_treasure_gold                   0.0
total_treasure_platinum               0.0
total_treasure_gems                   0.0
total_treasure_jewellery              0.0
total_treasure_magic                  0.0
total_treasure_monster_copper         0.0
total_treasure_monster_silver         0.0
total_treasure_monster_electrum       0.0
total_treasure_monster_gold           0.0
total_treasure_monster_platinum       0.0
total_treasure_monster_gems           0.0
total_treasure_monster_jewellery      0.0
total_treasure_monster_magic          0.0
wm_total_treasure_copper              0.0
wm_total_treasure_silver              0.0
wm_total_treasure_electrum            0.0
wm_total_treasure_gold                0.0
wm_total_treasure_platinum            0.0
wm_total_treasure_gems                0.0
wm_total_treasure_jewellery           0.0
wm_total_treasure_magic               0.0
Coins                                11.0
Gems                                  0.0
Jewellery                             0.0
Magic                                 0.0
Total Gold Equivalent                21.5
x                                    13.0
y                                    16.0
z                                     1.0
Median room size is 13 by 16 – y dimensions are likely to be bigger.
So if we call a median room an exemplar, let’s have a look:
Selecting all the 13 by 16 the medians:
monster_xp                            0.0
wm_xp                                19.0
monster_total                         0.0
wm_total                              0.5
traps                                 0.0
rooms                                 3.5
total_treasure_copper                 0.0
total_treasure_silver                 0.0
total_treasure_electrum               0.0
total_treasure_gold                   0.0
total_treasure_platinum               0.0
total_treasure_gems                   0.0
total_treasure_jewellery              0.0
total_treasure_magic                  0.0
total_treasure_monster_copper         0.0
total_treasure_monster_silver         0.0
total_treasure_monster_electrum       0.0
total_treasure_monster_gold           0.0
total_treasure_monster_platinum       0.0
total_treasure_monster_gems           0.0
total_treasure_monster_jewellery      0.0
total_treasure_monster_magic          0.0
wm_total_treasure_copper              0.0
wm_total_treasure_silver              0.0
wm_total_treasure_electrum            0.0
wm_total_treasure_gold                0.0
wm_total_treasure_platinum            0.0
wm_total_treasure_gems                0.0
wm_total_treasure_jewellery           0.0
wm_total_treasure_magic               0.0
Coins                                60.0
Gems                                  0.0
Jewellery                             0.0
Magic                                 0.0
Total Gold Equivalent                60.0
x                                    13.0
y                                    16.0
z                                     2.0
Periodic Checks                      10.0
So these are therefore likely to have an exit to level 2 – [z = 2]
The distribution of area of the Dungeons:

Here are the individual stats for the Dungeons:
https://docs.google.com/spreadsheets/d/1rbTE5-d4ju9nuQC57Dt8rCNPvuNbW3VR-JA7iAMqyvc/edit?usp=sharing




