A system of betting to even out the odds at
roulette. Bet '1st dozen'
(1-12), and 'high' (19-36). This covers 30
numbers out of 36
numbers.
On a
spin in the first dozen, the gain is +1. A spin in high nets no
loss or
gain. The only numbers open to
loss are 13-18. This is
a very safe
method for betting (compared to most).
Odds of winning +1: 1 in 3
Odds of losing -1: 1 in 6
Odds of nothing: 1 in 2
This can also be flipped around to bet on the third dozen, low.