====== Experimental Mania Farm ======

Experimental farm evidence ranks eligible fresh charts without promising a particular PP return.

^ Availability | Mania 4K and 7K; staff enablement and validated evidence |
^ Documentation status | Current behavior |
^ Behavior reference | v6.6.16 · reviewed 2026-09-28 |


Mania Farm uses a research signal informed by sampled player top plays, accuracy, performance, map structure, and exposure-adjusted adoption. It aims to recognize efficient charts while accounting for evidence quality.

[[commands:farm|.farm]] selects the highest-index eligible fresh charts first in the checked implementation. Strong strict matches precede the more permissive [[wiki:style_fallback|fallback]]. A chart still needs to satisfy the room's hard filters and key mode.

Farm availability depends on staff enablement and validated data. The 4K and 7K research models have different coverage; their raw index values are not interchangeable. The farm index is an experimental ranking signal, not a guaranteed amount of PP for your score.

Variety can use bounded farm-aware weighting while retaining all eligible structural styles. Missing evidence is not an automatic exclusion from Variety. See [[wiki:map_selection|selection rules]] and [[updates:start|release history]].

===== Upcoming v6.6.19 catalog refresh =====
**v6.6.19 is queued, not yet active at this article's September 30 review.** Once it deploys, the refreshed native Mania catalogs provide **16,987 potentially selectable 4K maps** and **3,654 potentially selectable 7K maps** across all supported star ratings and playable lengths (45–600 seconds), after the usual Ranked/Approved, 1,000-pass, and key-mode requirements. That is **20,641 total**, up from **20,071** in the current catalogs. Room settings narrow the pool actually available for any particular pick. Structural styles have fresh chart analysis; Variety can also choose eligible charts without a named structural tag.

Farm scores cover more charts, but a score alone does not make a chart eligible for ''.farm''. Recalibrated strict Farm thresholds yield **4,406 qualifying 4K** and **1,028 qualifying 7K** charts across those same hard filters, **5,434 total**, compared with **5,835** previously. The smaller strict pool is intentional: the new model's cutoffs target about one quarter of eligible 45–180-second charts in each key mode. ''.farm'' continues to prefer the strongest eligible fresh charts, then uses the existing style fallback when needed. The normal difficulty, length, pass-count, repeat, and key-mode rules still apply. See [[updates:v6_6_19|the pending release note]] and the [[updates:start|live-version notice]].

===== Worked example =====
When enabled, ''.farm'' prefers the strongest eligible fresh index candidates before weaker-feature fallback. ''.variety'' broadens the structural selection.

===== Limitations =====
Farm is not a structural pattern. Confidence, evidence coverage, and key-mode models matter; raw 4K and 7K indices are not interchangeable.

===== Related articles =====
See [[wiki:pattern_atlas|a related guide]] and [[wiki:start|all features]].