Phase 10 Phase-Difficulty Dataset: 7.5 Million Monte Carlo Games

This dataset contains Monte Carlo estimates of the relative difficulty of all ten phases in the card game Phase 10, based on 7.5 million simulated games (250,000 games per phase for 2-, 4-, and 6-player tables), yielding 15 million player-level completion-time observations. For each phase and table size, the dataset reports the probability of being dealt a complete phase, the full distribution of turns required to complete the phase under a greedy strategy, and summary statistics. The simulator (included, single-file C, fixed random seeds) was validated against an exact combinatorial calculation and an independent implementation; all results are exactly reproducible. Methods, rules assumptions, and limitations are documented in METHODS.md. No comparable public dataset was found at the time of publication. Phase 10 is a trademark of Mattel, Inc.; this independent analysis is not affiliated with or endorsed by Mattel.