Welcome to RationalPlay !


RationalPlay presents here free predictions calculated for several 6/49 official lotteries from Canada, Spain, UK and US.
The main goal of our predictions is to improve the odds of winning the jackpot by up to 20 times, and we try to achieve that by calculating a group (or list) of 6-number combinations most likely to appear in the next draw.

As the size of our combination list is about 20 times smaller than the total number of 6/49 combinations, choosing any play from our list gives an improvement of the odds of winning of about 20 times, supposing that the list will contain the winning combinations among all its other combinations.
A good side effect of this approach is that even when our prediction list does not match the whole 6-number winning set, it often matches many other subsets. That means the list contains also smaller prizes predicted (5, 4 and 3 numbers, and of course 5+bonus or 2+bonus for those lotteries which use a bonus ball (numéro complémentaire / complementario).

All the 6/49 combinations and a RationalPlay prediction list

So far our results have been encouraging: at the end of June 2008 we started to calculate predictions for Canada's Lotto 6/49 draws and we predicted the 6-number winning set (as included in our prediction list) 5 times by the end of December 2008.
On December 31 2008 we started to calculate prediction lists for other distinct 11 lotto games of the 6/49 type, played in a few US states, in the Canadian provinces, in Spain and in UK.
We expect that the trends of our predictions' results to evolve differently for each of those new 11 lotteries. That means periods of time in which some of the predictions will be excellent for some lotteries, while at the same time the predictions for other lotteries will have moderate or poor results. But it is also possible in the future to notice periods in which all the predictions will be very good.

Update June 20, 2009: Due to technical constraints and the low popularity of our predictions in Europe and US, we had to suspend the process of generating prediction lists for Europe and US lotteries, until further notice.

For more details please read the FAQ page, and if you have any ideas, suggestions or observations please discuss them on our forum.