Shield

an UCI compliant chess engine by Luigi Marco Ripamonti, written in the D programming language. After Tamerlane and Madeleine, Shield is the third chess engine by Luigi Marco Ripamonti - its development started around November 2015. Shield had its tournament debut at the IGWT IV in early 2017, where it qualified for the final steps, and lost in the round of sixteen versus later winner Andscacs. || toc =Selected Features= Many engine features and terms are configurable using a text file, for instance point values and various evaluation terms, and switches and thresholds controlling the search and selectivity.
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 * [[image:Scutum_in_Kelin.jpg link="https://commons.wikimedia.org/wiki/File:Scutum_in_Kelin_(1).jpg"]] ||~ || **Shield**,
 * Roman shield ||~ ||^ ||

Board Representation

 * Bitboards
 * Magic Bitboards

Search
> History Heuristic > Internal Iterative Deepening > Killer Heuristic > Futility Pruning > Null Move Pruning > Static Null Move Pruning > Late Move Reductions > Check Extensions > Passed Pawn Extensions > Recapture Extensions > Singular Extensions
 * Iterative Deepening
 * Aspiration Windows
 * Principal Variation Search
 * Transposition Table
 * Quiescence Search
 * Move Ordering
 * Selectivity

Evaluation
> Bishop Pair > Trapped Pieces > Rook On Seventh > Rooks on (Semi) Open File > Bad Bishop > Backward Pawn > Doubled Pawn > Isolated Pawn > Connected Passed Pawns > Protected Passed Pawns > Castling rights > Pawn Shelter > Attacking King Zone > King Tropism > Square Control
 * Tapered Eval
 * Material
 * Mobility
 * Connectivity
 * Outposts
 * Pawn Structure
 * Passed Pawn
 * King Safety
 * King-Square Table

Misc

 * Opening Book
 * Pondering

=See also=
 * Madeleine
 * Tamerlane

=Forum Posts=
 * [|Shield Chess Engine v 1.0] by AA Ross, CCC, January 01, 2016

=External Links=

Chess Engine
> [|Shield - Downloads]
 * [|Shield - Home]
 * [|Shield] « G 6
 * [|Shield 1.2 64-bit] in CCRL 40/40

Misc

 * [|Shield from Wikipedia]
 * [|Shield (disambiguation) from Wikipedia]
 * [|Shield wall from Wikipedia]
 * [|Scutum (shield) from Wikipedia]

=References= =What links here?= include page="Shield" component="backlinks" limit="20"
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