Create a pivot around one clear decision
Duplicate the chapter at the last shared moment, then name the decision that changes. Perhaps the witness tells the truth, the hero refuses the invitation, or the letter arrives one day late. One explicit hinge makes the versions comparable.
Avoid changing the voice, setting, point of view, and outcome at once. If everything differs, you are comparing two new chapters rather than testing one story decision.
Write both versions far enough to reveal consequences
A surprising scene is not automatically the stronger path. Continue each version until you can see what it costs the next chapter. The better pivot often creates sharper pressure with fewer repairs downstream.
- What new action becomes unavoidable?
- Which character gains or loses agency?
- Does the version reveal information too early?
- Which later scenes become stronger, weaker, or impossible?
Compare function before comparing sentences
Beautiful prose can disguise a weaker turn. First compare the job each version performs: change, conflict, revelation, pacing, and the promise carried into the next chapter. Edit line by line only after choosing the stronger dramatic function.
A simple score is enough: tension created, character truth exposed, continuity cost, and momentum into the next scene. The score should support judgment, not replace it.
Choose one release version and keep the other intact
Mark one version as the release choice for this chapter. The book can then assemble a clean manuscript from the selected version of every chapter while preserving the alternative for later revision.
Changing the release choice should never delete the other draft. Selection is a reversible editorial decision, not a merge operation.
Check the assembled manuscript, not isolated winners
The strongest individual chapter may not produce the strongest book. Read the transition into and out of the chosen version, then scan the release map for unresolved references to the rejected path.
If Version B changes who holds a secret, search the later manuscript for every scene that depends on the old knowledge state. This is where linked story notes turn experimentation into safe revision.
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