BiT-MCTS: A Theme-based Bidirectional MCTS Approach to Chinese Fiction Generation
Generating long-form linear fiction from open-ended themes remains a major challenge for large language models, which frequently fail to guarantee global structure and narrative diversity when using premise-based or linear outlining approaches. We present BiT-MCTS, a theme-driven framework that operationalizes a "climax-first, bidirectional expansion" strategy motivated by Freytag's Pyramid. Given a theme, our method extracts a core dramatic conflict and generates an explicit climax, then employs a bidirectional Monte Carlo Tree Search (MCTS) to expand the plot backward (rising action, exposition) and forward (falling action, resolution) to produce a structured outline. A final generation...
| Authors | Zhaoyi Li, Xu Zhang, Xiaojun Wan |
|---|---|
| Primary category | cs.CL |
| Published | 15 March 2026 |
| Last updated at source | 13 April 2026 |
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