Roulette table

The target is +500, so I spread 17 chips on each of five straight-ups. Any single hit nets +527 and reaches 1500, and the 85-chip spin cost allows about 11 spins, giving roughly a 79% chance of at least one hit.

Need +585 from 915 over 19 spins; one straight-up hit at 18 chips (net of the other two losing stakes) pays about +576 to +594, close to the goal, so spreading three straight-up bets maximizes the chance of reaching 1500 per chip risked.

Needing +639 in 18 spins, three straight-ups at 20 chips each net +660 on any single hit (about 7.9% per spin) while costing only 60 per spin, which keeps many spins available to reach the target.

Needing +699 with 17 spins left, one straight-up hit is the only fast route. Eight straights at 25 chips each (200 total) net +700 on a hit, which reaches 1,500, and give the best hit chance per spin for the bankroll.

Reaching 1500 from 601 needs a roughly +900 swing, which only a straight-up hit can deliver. I'm staking 27 on each of two straights and will scale stakes up with cumulative losses so any single hit still reaches the target.

Only a straight-up hit can realistically close the 953-chip gap in 15 spins. Two straights at 29 each net +986 on a hit, which reaches the target, and the 58-chip cost per spin allows about 9 attempts.

Reaching 1500 from 489 needs about 1011 profit, so only a straight-up hit can get there. Staking 44 per spin allows about 11 tries, and a hit on any of them still reaches the target.

I need +1055 with 13 spins left, and one 35:1 straight-up hit at 31 chips gets there (445+35*31=1530). So I'll bet the minimum stake that reaches the target on a single hit, which leaves enough bankroll to try on every remaining spin.

Reaching 1500 from 414 needs about +1086, which only a straight-up hit can deliver. A 32-chip straight pays 1120, enough to reach the target, and it is the cheapest per-spin bet that does so, so I can repeat it across the remaining spins.

Reaching 1500 from 382 needs a straight-up hit. A single 32-chip straight-up wins 1120, taking 382 to 1502, and is the most chip-efficient way to keep chances alive over the remaining spins.

Need +1150 in 10 spins; a 33-chip straight-up pays 1155 on a hit, reaching 1505 from 350, and it keeps the most spins available to try (about 23% overall).

Reaching 1500 from 317 requires a straight-up win, and a 34-chip stake pays 35:1 to reach exactly 1507. I'm spreading one straight bet per spin to cover the most numbers across the 9 remaining spins before the stakes needed grow too large.

Reaching 1500 from 283 needs a straight-up hit; a 35-chip straight pays 1225, enough for the target. One straight per spin stretches the bankroll across all 8 remaining spins, giving roughly 8 chances at 1/38 each.

Reaching 1500 from 248 needs roughly one straight-up hit, and 36 chips on a single number pays 1260, enough to reach 1508. This is the cheapest stake per number covered, so I take it and will adjust the stake upward as the bankroll shrinks.

Reaching 1500 from 212 needs a net gain of 1288, which only a straight-up hit can deliver. Four straights at 41 each net 1312 if any hits, and this leaves 48 chips for one more 37-chip straight on a later spin.

Bankroll is already 1524, above the 1500 target, and skipping is allowed with no penalty. Any bet has negative expected value and could drop me below target, so I place no bet.

Bankroll is already 1524, above the 1500 target, and skipping is allowed with no penalty, so placing no bets locks in success with zero risk.

Bankroll is already 1524, above the 1500 target, and skipping is neither rewarded nor penalised, so placing no bet keeps the target secured.

Bankroll is 1524, already above the 1500 target with 2 spins left. Skipping is allowed and unpenalised, so I place no bets and keep the target secured.}

Bankroll is 1524, already above the 1500 target with one spin left. Skipping the spin keeps the target secured, while any bet risks dropping below it.