dicechess-engine
0.14.10-SNAPSHOT
API
Generated with
Fortemate Dice Chess Engine
Fortemate Dice Chess Engine
dicechess-engine/dicechess.engine/dicechess.engine.search/RichFeatures

RichFeatures

dicechess.engine.search.RichFeatures
object RichFeatures

The material feature set (OnnxFeatures) plus cheap, dice-free positional features — the signal a material-only model is blind to (it cannot tell two positions of equal material apart).

Kept separate from OnnxFeatures on purpose: that 7-feature set is the input contract of the currently deployed model, so its shape must not change. RichFeatures reuses it for the material block and appends the positional columns, giving a distinct input for a model trained on the richer set. Computing features here — in the engine, the single source of truth for move generation — means training-data enrichment and inference share this exact code, with no Python/Scala re-implementation drift.

All features are from color's own perspective (own minus opponent) and independent of the dice pool, matching the dice-free leaf the search evaluates.

Attributes

Note

Cost: mobility_diff runs two full dicechess.engine.movegen.MoveGenerator.generateAllMoves passes, so this set is not cheap enough to evaluate on every leaf of a 2-ply search (hundreds of thousands per move). It targets training enrichment and one-ply / shallow inference — the "one-ply + rich features vs. two-ply + material" comparison.

Source
RichFeatures.scala
Graph
Supertypes
class Object
trait Matchable
class Any
Self type

Members list

Value members

Concrete methods

def extract(state: GameState, color: Color): Array[Float]

Extracts the rich feature vector from color's perspective. Layout is columnNames:

Extracts the rich feature vector from color's perspective. Layout is columnNames:

  • the 7 material features, identical to OnnxFeatures.extract;
  • mobility_diff — pseudo-legal move count (dice-independent) for color minus the opponent;
  • king_safety_diff — Evaluator.evaluateKingSafety for color minus the opponent (negative when our king is the one under attack).

Attributes

Source
RichFeatures.scala

Concrete fields

val columnNames: List[String]

Column names in the exact order extract returns values: the material block (aligned with the training pipeline's MATERIAL_COLUMNS) followed by the positional columns. The enrichment step writes CSV headers from this list, so training and serving agree on layout.

Column names in the exact order extract returns values: the material block (aligned with the training pipeline's MATERIAL_COLUMNS) followed by the positional columns. The enrichment step writes CSV headers from this list, so training and serving agree on layout.

Attributes

Source
RichFeatures.scala
val schemaId: String

Stable id of this feature contract — see OnnxFeatures.schemaId for why it is versioned.

Stable id of this feature contract — see OnnxFeatures.schemaId for why it is versioned.

Attributes

Source
RichFeatures.scala
Generated with
Fortemate Dice Chess Engine
Fortemate Dice Chess Engine