4–2 Doey-Don’t Craps System: Rules and Math
Pass and Don’t Pass schedule · 4–2 rotation · Independent outcomes
The “4–2 Doey-Don’t” system is an old CrapsPit contributor method that alternates between runs of Pass Line and Don’t Pass bets. Despite the name, it is not the usual doey-don’t hedge of betting both sides at once. Its defining rule is a schedule: seek two Pass wins or four Don’t Pass wins, then switch sides.
The schedule does not read the table
A recent Pass or Don’t Pass result does not make the next contract more likely to win. The system supplies a betting routine, but its two-versus-four targets do not overcome the 1.41% Pass Line or 1.36% Don’t Pass edge.
Reconstructed 4–2 rules
- Wait for the current Pass Line contract to resolve before starting.
- Choose the Pass phase or Don’t phase. The original contributor switched according to the previous result.
- During a Pass phase, continue until two Pass contracts have won.
- During a Don’t phase, continue until four Don’t Pass contracts have won.
- If the opposite side wins before the phase target is complete, switch and begin that side’s target.
- Keep the flat wager constant unless a separate staking rule has been written in advance.
The old examples were ambiguous about whether interrupted counts reset or resume. A usable version must choose one rule. Resetting the count is simpler to track and does not pretend that an unfinished streak remains “due.”
What each contract costs
| Bet | Come-out treatment | Standard flat-bet edge |
|---|---|---|
| Pass Line | 7 or 11 wins; 2, 3, or 12 loses | About 1.414% |
| Don’t Pass, bar 12 | 2 or 3 wins; 7 or 11 loses; 12 pushes | About 1.364% |
Those percentages apply to each flat contract. Taking or laying true Odds after a point adds a zero-edge wager, but it also adds dollars at risk. Odds cannot retroactively make the flat bet free.
Why “up half, down half” is misleading
The original page described properly played craps as a 50–50 proposition. The line bets are close to even, not exactly even. The bar number, come-out rules, and point probabilities create the casino edge. A stop-win or stop-loss can limit a session, but leaving while ahead does not change the expectation of the contracts already played.
A trackable way to test it
- Use one fixed flat unit for both phases.
- Record completed contracts, not individual rolls.
- Record pushes separately on the Don’t Pass side.
- Keep Odds results separate from flat-bet results.
- Compare the schedule with simply making the same line bet every time.
- Stop at the predetermined money or time limit—not after a pattern “changes.”
Worked phase-tracking example
Assume $10 flat bets and the reset rule described above. A Pass win moves the Pass count to one of two. If the next Pass contract loses, the schedule switches to Don’t Pass and starts that count at zero of four. A Don’t Pass win then moves its count to one; a come-out 12 push leaves both the wager result and the phase count unchanged under bar-12 rules.
Keep two columns in the ledger: the phase count and the actual dollars won or lost. The count tells you which contract the schedule calls for next; it does not erase the $10 result of a losing contract or make the next side more likely to win.
Review the underlying Pass Line and Don’t Pass rules before trying any alternating schedule. Standard contract rules were checked against the Massachusetts Gaming Commission’s Craps and Mini-Craps rules.
