Monday, March 2, 2009

didn't we do one like this a year ago?

Again, it's not too hard to do the math explicitly here, but the intuition is what I'm after.

irilyth has a choice; he can take my 4-sided die, or my 12-sided die.
Which is better? If they both were showing the same value, it would be a no-brainer,but since the 4-sided die has a slightly higher value, there's some tradeoff here. is it enough? What if the 12-sided die had value 2, instead?


Viewing Game #662681

Tournament #13769: Scorpion!
Current Round: Round 1. (organized by alaric)
This game was last modified on Mon Mar 2, 2009 14:01:06

Player: ElihuRoot *Dead Dude* *Fanatic*
Button Man: Scorpion Score: 28 (-8 sides) Rounds Won/Lost/Tied: 1 / 2 / 0 (out of 3 round(s))
Captured Dice: Focus 12-sided die, Focus 4-sided die, 4-sided die
Dice 4-sided dieFocus
12-sided die
Value 43
Dice 4-sided die20-sided die
Value 120
* Next Turn * Player: irilyth *Poisonous Turtle* *Silver Medal in Men's 100 Meter Dash* * Next Turn *
Button Man: Scorpion Score: 40 (8 sides) Rounds Won/Lost/Tied: 2 / 1 / 0
Captured Dice: 20-sided die, Focus 4-sided die, 4-sided die

Results from last turn:
ElihuRoot is performing a power attack with a Focus 12-sided die showing 4,
targeting irilyth's 4-sided die showing 4.

The Focus 12-sided die is rerolled and the new value is 3.

ElihuRoot takes irilyth's die.

2 comments:

Anonymous said...

My intution is definitely the 12-sider, and it doesn't matter what it's showing, because you're going to get to reroll it on your next turn anyway... So the only thing that matters is: When you reroll it, how likely is it to be higher than my rerolled 20-sider?

"More likely than 1/5" is my clear intuition.

(...and also, even if I roll a 1 - 4 on the 20-sider, I still have a 1/4 chance to win if you roll a 1 when you take it.)

Anonymous said...

My intuition arrived at the same answer as irilyth's in a different way.
There's a slightly higher chance that the 20-sider will roll low enough to be captured if the 12-sider is taken first.
If the 20-sider is taken, there's a much higher chance of the 4-sider rerolling a one than the 12-sider doing so.
So, in the worst case, the odds are better if the 4-sider is the die left.