Assess how likely a human is to go wrong in a position

Usage

blunder_risk(
  fen,
  maia,
  min_prob = 0.01,
  movetime_ms = 1200L,
  engine_path = NULL,
  max_loss_cp = 1000
)

Arguments

fen: Position to assess.
maia: A session from maia_session_start().
min_prob: Ignore moves a human is very unlikely to play; keeps the engine work proportional to what actually matters.
movetime_ms: Engine time for the evaluation search.
engine_path: Optional explicit engine path.
max_loss_cp: Ceiling on how bad a single move is allowed to count as. Past roughly ten pawns a move is simply losing, and without a ceiling a forced mate (scored in the thousands) would swamp the average and make risk unreadable.

Value

A list with risk (probability-weighted centipawn loss), blunder_prob (chance of losing at least a pawn), sharpness (how much the plausible moves disagree in value), best (the engine's move) and moves, a data frame of candidates with prob, cp, loss and contribution.