There are actually (at least) three Isight algos for money play.
1) Simple Isight without using delta _ l
2) The delta_l version
3) Using both but having an algo to determine whether you use
method 1 or method 2.
It could also be useful to have simplifications such as: If you lead
by X pips and Y is true, it's D/P anyway.
On Tuesday, April 19, 2022 at 12:10:15 PM UTC+1, Axel Reichert wrote:
"peps...@gmail.com" <peps...@gmail.com> writes:
There are actually (at least) three Isight algos for money play.1 and 2 give EXACTLY the same cube action in a money session. I prefer
1) Simple Isight without using delta _ l
2) The delta_l version
3) Using both but having an algo to determine whether you use
method 1 or method 2.
the more general Delta l version, because it will give you a winning percentage, which is required for match play. Then you "just" need to do some match equity calculation to come up, say, with your cash point (typically you want to double close to it) and act accordingly.
It could also be useful to have simplifications such as: If you leadI think a pretty robust recommendation by Robertie is that it is a
by X pips and Y is true, it's D/P anyway.
double if you have a smaller pipcount AND a smaller number of checkers
on board.
Best regards
AxelThanks. I can't resist testing it, now that I have more info.
I'm going to try and be a bit sneaky and trip Isight up a little bit.
Let's make the position a bit atypical by giving the opponent just
a single checker on her 6 point. This maximises her recube vig.
I'll be on roll with two checkers on my two point.
This is well-known as redouble/take.
But, since the opp's recube vig is so high, she can take even though
her winning probability is small -- will this fool Isight?
I have a gap on my six point that she doesn't have.
So my count is 5. Hers is 6.
5 + 5/6 - 6 is negative so D/P which is wrong.
80 - 5/3 + 2 * 1 is bigger than 76 which is a wrong D/P as before.
Yes, the D/P is wrong. But maybe the probability is fine.
The probability of me winning if the game is played to the end
is 1 - (5/18 * 3/4) = 57/72 = 19/24 = 79%. 80 - 5/3 + 2 = 80 1/3 which ain't a bad approx.
I don't see the reason why the two algos would always give the same cube actions but I'll take your word for it.
Oh, ok. I think I get it. You start with an 80 year old man (call him Bob) and then assess how well he gets on
with his friends aged 68, 70 and 76. So there are differences involved and it probably translates to the 6, 5, 2 pattern when
you do the manipulations.
Paul
"peps...@gmail.com" <peps...@gmail.com> writes:
There are actually (at least) three Isight algos for money play.1 and 2 give EXACTLY the same cube action in a money session. I prefer
1) Simple Isight without using delta _ l
2) The delta_l version
3) Using both but having an algo to determine whether you use
method 1 or method 2.
the more general Delta l version, because it will give you a winning percentage, which is required for match play. Then you "just" need to do
some match equity calculation to come up, say, with your cash point (typically you want to double close to it) and act accordingly.
It could also be useful to have simplifications such as: If you leadI think a pretty robust recommendation by Robertie is that it is a
by X pips and Y is true, it's D/P anyway.
double if you have a smaller pipcount AND a smaller number of checkers
on board.
Best regards
Axel
On Tuesday, April 19, 2022 at 12:33:19 PM UTC+1, peps...@gmail.com wrote:
On Tuesday, April 19, 2022 at 12:10:15 PM UTC+1, Axel Reichert wrote:
"peps...@gmail.com" <peps...@gmail.com> writes:
There are actually (at least) three Isight algos for money play.1 and 2 give EXACTLY the same cube action in a money session. I prefer the more general Delta l version, because it will give you a winning percentage, which is required for match play. Then you "just" need to do some match equity calculation to come up, say, with your cash point (typically you want to double close to it) and act accordingly.
1) Simple Isight without using delta _ l
2) The delta_l version
3) Using both but having an algo to determine whether you use
method 1 or method 2.
It could also be useful to have simplifications such as: If you leadI think a pretty robust recommendation by Robertie is that it is a
by X pips and Y is true, it's D/P anyway.
double if you have a smaller pipcount AND a smaller number of checkers
on board.
Best regards
AxelThanks. I can't resist testing it, now that I have more info.
I'm going to try and be a bit sneaky and trip Isight up a little bit.
Let's make the position a bit atypical by giving the opponent just
a single checker on her 6 point. This maximises her recube vig.
I'll be on roll with two checkers on my two point.
This is well-known as redouble/take.
But, since the opp's recube vig is so high, she can take even though
her winning probability is small -- will this fool Isight?
I have a gap on my six point that she doesn't have.
So my count is 5. Hers is 6.
5 + 5/6 - 6 is negative so D/P which is wrong.
80 - 5/3 + 2 * 1 is bigger than 76 which is a wrong D/P as before.
Yes, the D/P is wrong. But maybe the probability is fine.
The probability of me winning if the game is played to the end
is 1 - (5/18 * 3/4) = 57/72 = 19/24 = 79%. 80 - 5/3 + 2 = 80 1/3 which ain't a bad approx.
I don't see the reason why the two algos would always give the same cube actions but I'll take your word for it.
Oh, ok. I think I get it. You start with an 80 year old man (call him Bob) and then assess how well he gets on
with his friends aged 68, 70 and 76. So there are differences involved and it probably translates to the 6, 5, 2 pattern when
you do the manipulations.
PaulI knew I'd get these wrong at first. I forgot my extra checker. This makes the method better but I'm not sure whether it will work.
Both our counts are in fact 6. 6 + 6/6 - 6 = 1. Still D/P.
How about the probability? 80 - 6/3 + 1 = 79%. Wow, that is pretty much perfection!
Paul
I don't see the reason why the two algos would always give the same
cube actions but I'll take your word for it.
Oh, ok. I think I get it. You start with an 80 year old man (call
him Bob) and then assess how well he gets on with his friends aged 68,
70 and 76. So there are differences involved and it probably
translates to the 6, 5, 2 pattern when you do the manipulations.
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