I have spent most of this year developing a dutch betting system and having it as a website. The system gets all the pricing information from Betfair. I have tested it successfully on 2 of my computers and would now like to have the general public test it. Some of the features are -

• calculate bet amounts from live Betfair odds
• bet multiple (upto 90%) of runners in a race for a profit
• calculates saver bets
• bet to win set amounts on each horse
• dutch bet calculations on any Betfair market (International and Australian markets) - cricket, rugby, soccer etc etc
• completely secure using 128bit encryption
• submits dutch bets to Betfair for you

If you have a Betfair account and would like to help me out testing my system I would greatly appreciate it. I should point out, this is a personal project (not a commercially or publically available website) that I have been working on in my spare time.
I will have sample videos available on Youtube soon.
Thanks,
Jeff

Hi Janfree,
I do a fare bit of Dutching & use the Fairbot program.

I would be happy to test it for you.

You can contact me on
bhk at bigpond dot net dot au

Cheers.

__________________
Cheers.

Hello jamfreefall,

You wrote that “I have spent most of this year developing a dutch betting system and having it as a website. The system gets all the pricing information from Betfair. I have tested it successfully on 2 of my computers and would now like to have the general public test it.... If you have a Betfair account and would like to help me out testing my system I would greatly appreciate it. I should point out, this is a personal project (not a commercially or publically available website) that I have been working on in my spare time.”

Jamfreefall, there is a contact link which you can access by scrolling down to the bottom of this page. As you indicate that "this is a personal project" we can't work out why you need the public to test it if it is working fine for you and you are not intending to sell it to the public. Can you please contact us and explain why you need the public to test your programme if it is already working successfully on your computers, which means that you can use it.

Moderator 3.

Following correspondence with Jamfreefall this thread has now been unlocked.
Moderator 1.

I'm not sure how best to work this. I have outlined my intentions with the mods which are basically that I have a site which I want to limit the amount of people who can see it. Therefore I can't/won't mention it on here. It is also free, obligation free and I have no intention of having a subscription or payment for it. I have tested it thoroughly but it is just niggly little bugs in it now which may take me months to find all by myself. If I have others testing it with me it will make the process quicker. I don't need to know your email for you to use my site but I can't think of any other way to let testers know where to go. I don't think this site has private messages does it? Any ideas?

The private messages has been disabled for a number of years due to misuse on forums. Moderator 3.

jam, just a thought but maybe something like facebook might be the go, as long as the mods were ok with providing a link to there once you were set up?

I'm still deciding what to do ... but in the meantime I have a couple of basic dutch betting formulas for anybody who is interested in having a dutch bet.

To win a set amount on each bet -
p = the percentage chance of each runner, all added together
m = our multiplier

m = (p/(100 -p))+1

example.
we want to back 2 horses, 1 paying $5 and the other paying $10. We calculate the odds chances of each, so for the $5 chance it is 20% (100/5) and the $10 chance it is 10% (100/10). So our p value is 30 (ie. 20 + 10). The formula becomes -

m = (30/(100 - 30)) + 1
m = (30/70) + 1
m = 1.43

to calculate the bet amount for each bet we multiply the horse percentage chance by our multiplier (m). So the bet amounts are -

a) $5 horse = 20 * 1.43 = $28.60
b) $10 horse = 10 * 1.43 = $14.30
Total amount bet = $42.90
***NOTE these amounts are calculated to win $100. If you would, for instance, like to win only $20 you would recalculate the bet amounts by using the formula ((b/100) * bet amount) at this stage, where b is the amount you want to win.

If horse (a) wins we collect 28.6 * 5 = $143
If horse (b) wins we collect 14.3 * 10 = $143
minus the $42.90 outlay and you have a net profit of $100 if either horse wins.

Next time I will discuss the formula for betting a set amount on a race. I have run out of time for now.

Part 2 - To bet a certain amount on a race.
The formula is -

m = 100/p

where p is the sum of the percentage chance of each selection.

Example.
Again we have 2 horses - horse (a) paying $5 and horse (b) paying $10. So the percentage chances of each horse is 20% for (a) and 10% for (b). The sum of the percentage chance, the value of p in the formula, is 30.

m = 100/30
m = 3.33

Now we multiply each percentage chance by m -
(a) = 20 * 3.33
(b) = 10 * 3.33

(a) = $66.60
(b) = $33.30

Total bet on the race is roughly $100
If you only wanted to bet $25 on the race you would multiply the amounts above by 25/100. So (a) would become 0.25 * 66.6 = 16.65 and (b) would become 0.25 * 33.3 = 8.33 which gives us a total around $25

I hope this helps you out and helps you make a profit or more of a profit.

I think these kind of dutch formulas are pretty generic as far as dutching goes. The important part of dutching with these formulas is that you need to know which runners to omit from the selection. Most of the time the book % for backing is > 100 so the main problem I have is that you cant use this if you dont have some knowledge about the market you're looking at.

Example - 4 horse race (Book percentage = 105%)
Horse 1 = $2 (50%)
Horse 2 = $4 (25%)
Horse 3 = $5 (20%)
Horse 4 = $10 (10%)

Quite feasible. Now using the first method:
P = 105
M = (105/(100-105))+1
= -20

Therefore amount to bet:
H1 = 50 * -20 = -2.5
H2 = 25 * -20 = -1.25
H3 = 20 * -20 = -1
H4 = 10 * -20 = -0.5

So that doesnt work. Right away you need to eliminate a runner...or if you could lay at all those 4 prices you'd be laughing but generally you cant get a lay book percentage > 100.


Second Method
p =105
M =0.9524

Amount to bet:
H1 = 50 *0.9524 = 47.62
H2 = 25 *0.9524 = 23.81
H3 = 20 *0.9524 = 19.05
H4 = 10 *0.9524 = 9.52

Total outlay = $100
BUT no matter who wins the return is only ~ $95.24 (thus meaning a guaranteed loss of $5 for the market)

So my point is that yes these formulas do work but only when you combine with a method to eliminate several runners from the calculations.

If it was a 12 horse race and the book percentage was 105-110 you could easily have to eliminate 5 or so runners to get it under 100 (so that these formulas are useful). Because a runner of 100/1 only reduces the book % down by 1. So you could be dutching only half a race to make a couple of bucks but if any of the missing runners win then you're out the full $100.