Drafting

[Hellfish]

How much does the AI prioritize staying in their colors? I'm not sure if this has been the case for a while, but at least since I started drafting NPH/MBS/SOM (A couple of weeks ago) exclusively it seems to always end up with 5-color decks, sometimes without mana sources for all cards!

[Sloth]

How much does the AI prioritize staying in their colors? I'm not sure if this has been the case for a while, but at least since I started drafting NPH/MBS/SOM (A couple of weeks ago) exclusively it seems to always end up with 5-color decks, sometimes without mana sources for all cards!

Looking at the code it seems there is no color check for artifacts.

[Rob Cashwalker]

The AI has been having trouble with the colorless artifact-heavy format. It tries to draft cards in its chosen colors, but likely runs out of options quick, so it starts picking up cards in other colors or artifacts..

When building its deck, it tries to pull cards from its colors first, then if it needs more cards, it will choose them from the other cards in its pool. There's a routine to figure out what basic lands need to be added based on the proportions of color in the casting costs, but it can't consider activation costs.

[Sloth]

The AI has been having trouble with the colorless artifact-heavy format. It tries to draft cards in its chosen colors, but likely runs out of options quick, so it starts picking up cards in other colors or artifacts..

When building its deck, it tries to pull cards from its colors first, then if it needs more cards, it will choose them from the other cards in its pool. There's a routine to figure out what basic lands need to be added based on the proportions of color in the casting costs, but it can't consider activation costs.

It should be no problem to also check artifacts for the chosen two colors to not end up with Behemoth Sledge instead of Mage Slayer when drafting red green.
I think what Hellfish reported is also caused by colored artifacts in NPH.

[Rob Cashwalker]

If anyone's interested in following the draft picks, here's a script I wrote to do it:
http://cardforge.org/draftAI/checkDraftData.php

[Rob Cashwalker]

I just changed the rating scale.

Code: Select all

(float)list.size() * (((((float)stopCount - (float)currentCount) * 100) / (float)stopCount) / 50);

list.size is the number of cards presented in the current pack, so the first pick in each pack would have a typical value of 15.
stopCount is typicaly 45. (number of packs * pack size)
currentCount is the overall draft pick count, first pick has value of 1.

I also reset the data table, erasing the test data I generated and the two drafts someone has already submitted.

edit - another couple changes I just made
The current card evaluation didn't take rarity into account, now it does.
Full-draft mode boosters are now generated from a reduced cardpool to match the size of a small set (175 cards).

[Sloth]

Full-draft mode boosters are now generated from a reduced cardpool to match the size of a small set (175 cards).

Why? If I chose a chaotic draft, I want to have full chaos.

[Rob Cashwalker]

No worries, it's still choosing those 175 randomly from the full list. The commons will experience a bit of repetition, then the uncommons will repeat during the 3rd round packs. The rares and mythics won't repeat.

[juzamjedi]

If anyone's interested in following the draft picks, here's a script I wrote to do it:
http://cardforge.org/draftAI/checkDraftData.php

I click on that link and get a blank form. I am interested in seeing draft data.

[Sloth]

No worries, it's still choosing those 175 randomly from the full list. The commons will experience a bit of repetition, then the uncommons will repeat during the 3rd round packs. The rares and mythics won't repeat.

That's what I imagined. I would prefer seeing lots of different cards though.

[Rob Cashwalker]

The form is blank because there's no data... I'm a horrible drafter... I get rather impatient, so my picks should not be used. I just did some to test with.

[Sloth]

No worries, it's still choosing those 175 randomly from the full list. The commons will experience a bit of repetition, then the uncommons will repeat during the 3rd round packs. The rares and mythics won't repeat.

Now that I can draft again, I have to repeat that I hate this change. I chose the full cardpool, because I don't want to see any cards twice. Maybe you can call this feature random limited cardpool or something, but give me back my full card pool.

[juzamjedi]

What is the process I should use for updating the cube? I want to make some changes to cut some of the junk and replace with new / more fun cards.

[Braids]

What is the process I should use for updating the cube? I want to make some changes to cut some of the junk and replace with new / more fun cards.

i am afraid you have caught us at a bad moment. i'm trying to write a guide for the new git repository.

[Rob Cashwalker]

juzamjedi, you can just edit the deck file. As we progress with getting our source code repository set up for everyone, then it can be updated with your changes. Unless your question is deeper in meaning than just the card pool?