Evaluation of Pieces
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This page serves as a quick reference for those who look for ideas about evaluating different kinds of pieces.
Pawn
- penalty for "d" and "e" pawns blocked on their initial squares
Knight
- Decreasing value as pawns disappear
- Outposts
- Knight trapped on A8/H8/A7/H7 or A1/H1/A2/H2 - see Trapped Pieces
- Penalty for blocking a C-pawn in closed openings (Crafty defines it as follows: white knight on c3, white pawns on c2 and d4, no white pawn on e4)
- When calculating knight mobility, it is advisable to omit squares controlled by enemy pawns
- Marginal bonus for a knight defended by a pawn
- Penalty for an undefended minor piece (Stockfish)
Bishop
- Bad Bishop
- Bishop Pair
- Bishop versus Knight
- Color Weakness
- Fianchetto
- Returning Bishop
- Bishop trapped by enemy pawns on A2/H2/A7/H7 or on A3/H3/A6/H6, see Trapped Pieces
- Penalty for an undefended minor piece (Stockfish)
Rook
- Increasing value as pawns disappear
- Rook on Open File
- Rook on Seventh (possibly also eigth) rank
- Tarrasch Rule
- Penalty for a Rook blocked by an uncastled King
- Small bonus for a rook with enemy queen on the same file (doesn't matter if it's open or not)
- Rooks defending each other (Rebel uses a piece/square table for that, making supporeted rook on 7th rank even more valuable)
Queen
- Penalty for early development [1]
- Some programs do not evaluate queen mobility
- Some versions of Fruit replace queen mobility by king tropism
- If king safety evaluation relies on king tropism, queen tends to get somewhat higher bonus
King
- King safety in the middlegame
- King centralization in the endgame
- Mate at a Glance
- Penalty for standing on a wing with no pawns present in the endgame
- Pins/X-ray
- Castling Rights
See also
Forum Posts
- Knight Evaluation by Jonathan Rosenthal, CCC, February 24, 2015
- eval pieces by Daniel Anulliero, CCC, June 15, 2015
References
- ↑ Queen wandering, was: Crafty 14,9 by Roland Pfister, CCC, May 11, 1998
