Snake Pit Ninja

[Scrawl]

So, I'm attempting to cTele into the rune vault on Snake Pit 5. The issue is, despite having the cTele bonus when the teleport triggers, and getting to pick my location, I always seem to end up somewhere random. For the record, I read a scroll of magic mapping, evoked cTele via a ring of teleport control and then activated my wand of teleport. I've attempted this several times, to no avail.

Is there something I'm missing?

[HilariousDeathArtist]

When you choose a square for a controlled teleport, you have a chance of teleporting to any of the nine squares within a radius of 1 from the chosen square.

If you cannot be placed in that square due to a dungeon feature (wall, lava, water, etc.) or a monster then you are teleported to a random square on the level instead.

[Scrawl]

Ahh, so attempting to teleport into a vault (presumably) brimming with monsters is shunting me away.. excellent answer, thank you!

EDIT: I've forgotten why I thought this was a good idea again:

Spoiler: show

backfired.PNG (712.68 KiB) Viewed 3054 times

[Patashu]

When you choose a square for a controlled teleport, you have a chance of teleporting to any of the nine squares within a radius of 1 from the chosen square.

Incorrect - you can actually teleport to any of the squares in a 5x5 box around your destination.
Here's how it works:
Start in the tile you pick
With 100% chance, pick a new tile in the 3x3 box
With 25% chance, pick a new tile in the 3x3 box a second time

[Laraso]

Um, yeah... That's a dead spriggan you've got right there if you don't immediately teleport back out of it.

[rchandra]

they are asleep, stab them all!

[Sandman25]

Incorrect - you can actually teleport to any of the squares in a 5x5 box around your destination.
Here's how it works:
Start in the tile you pick
With 100% chance, pick a new tile in the 3x3 box
With 25% chance, pick a new tile in the 3x3 box a second time

I don't get it. Do you mean the 25% chance takes place only when I cannot land in the tile from 100% step? Or is it always and thus it's possible to get random teleport after targeting central tile of 3x3 room?

[Sharkman1231]

I think it works like this:
You picked the square you want to teleport to, and the game always picks that spot, or any of the 8 squares surrounding it for you to teleport to. There would be a 1/9 chance for any one particular spot. Now, there's a 1/4 chance of that happening again, only now from the new spot. Then if that spot has a feature/monster, you are randomly teleported.

[Sprucery]

So the chance of successfully teleporting into a 3x3 empty room is (selecting the center as target):
3/4 + 1/4 * (1/9 + 4/9 * 4/9 + 4/9 * 6/9) = 3/4 + 1/4 * 49/81 = 3/4 + 49/324 = 292/324 = 146/162 = 73/81 = about 90%, am I right?

[Patashu]

So the chance of successfully teleporting into a 3x3 empty room is (selecting the center as target):
3/4 + 1/4 * (1/9 + 4/9 * 4/9 + 4/9 * 6/9) = 3/4 + 1/4 * 49/81 = 3/4 + 49/324 = 292/324 = 146/162 = 73/81 = about 90%, am I right?

I did the working out without looking at yours and got the same answer, so I would say yes.