Roulette table

A straight-up bet offers the best chance per spin. The 15-chip stake is the minimum that can reach the target from the current bankroll if it hits; after a loss, I can adjust the stake to keep a hit capable of reaching the target.

A 100-chip straight-up bet offers a chance to reach the target immediately; roulette outcomes are independent, so the previous result does not affect the choice.

A maximum-stake even-money bet offers a comparatively strong chance to build the required bankroll over the remaining spins, while keeping the action to a single bet.

A maximum-stake straight-up bet gives the high payout needed to reach the target in one hit; previous spins do not affect the independent odds.

A straight-up stake of 18 would clear the 615-chip gap with one hit, while limiting the loss on a miss and preserving bankroll for later spins.

A 19-chip straight-up win earns 665 net chips, enough to reach the target; larger stakes would not improve the hit probability and would risk more bankroll.

A 100-chip straight-up bet offers the best chance of a single hit immediately carrying the bankroll past the target. Previous spins do not affect the independent outcome probabilities.

A 22-chip straight-up win would bring the bankroll above 1,500. Roulette outcomes are independent, so prior results provide no useful basis for choosing a number.

A straight-up hit at this stake easily reaches the target, while keeping enough bankroll to continue betting across the remaining spins if it misses. Roulette outcomes are independent, so past results do not favor any number.

A 24-chip straight-up win would reach the 1,500-chip target from this bankroll. This is the smallest stake that can do so, preserving chips for later spins if it misses.

A 25-chip straight-up win nets 875 chips, enough to reach the 1,500 target. Keeping the stake at this minimum preserves bankroll for repeated independent attempts.

With 615 chips and nine spins left, reaching the target requires a large win. Two distinct maximum straight-up bets give the best chance of a single-spin payout large enough to reach it.

A 31-chip straight-up win would add 1,085 chips and reach the target; this minimum qualifying stake preserves bankroll for more attempts if it misses.

A straight-up hit at this stake would reach the target, while keeping enough bankroll for attempts on all seven remaining spins. Past outcomes do not affect the independent wheel odds.

A 58-chip straight-up bet can reach the target on a hit even after five prior losses, while preserving enough bankroll for six consecutive attempts. Past outcomes do not affect the next spin, so the number choice is arbitrary.

A 35-chip straight-up win gains 1,225 chips, enough to reach the target from my current bankroll. Staking only the minimum needed preserves the most chips for further attempts if it misses.

A 36-chip straight-up win reaches the 1,500-chip target from my current bankroll. A single straight-up bet gives a target-reaching chance while preserving bankroll for the remaining spins if it misses.

A 100-chip straight-up hit can reach the target immediately. Keeping the bet to one number preserves enough bankroll to continue taking that chance on later spins if this one misses.

With only two spins and 123 chips, reaching 1,500 requires a large straight-up win; staking the 100-chip maximum gives the best chance to reach the target immediately.

With one spin remaining, a maximum-stake straight-up bet offers the highest possible upside; no legal wager can reach the target from this bankroll.