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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.