# 2018-01-01 Dr. Alistair Ward <bishbosh@functionalley.com>

## 0.0.0.1
* First version of the package.

## 0.0.0.2
Minor changes required to build on Windows.

## 0.0.0.3
Added **Paths_bishbosh** to **Other-modules** section of cabal file.

## 0.0.0.4
Changed references to author's domain-name.

## 0.0.0.5
Added ability to specify the text-encoding used in a PGN-database file.
Updated list of test-compilers.

## 0.0.0.6
Fixed failure to persist game-state after requesting that the game be restarted.
Fixed parsing of **TextEncoding** in **PGNOptions**.
Replaced module **Distribution.Verbosity** with **BishBosh.Input.Verbosity**.

## 0.0.0.7
Rewrote function **BishBosh.Data.RoseTree.countTerminalNodes** in accordance with the suggestions of David Feuer.
Amended function **BishBosh.State.EnPassantAbscissa.mkMaybeEnPassantAbscissa** to guard against exposing one's King after En-passant capture.

## 0.0.0.8
Corrected the parsing of FEN when an Enpassant-destination defined on file **b** was erroneously interpreted as a bishop in the previous **CastleableRooks** field.
Added parent class **BishBosh.Property.ExtendedPositionDescription.EPD** for **Property.ForsythEdwards.FEN**, for which the latter typically has a default implementation of both methods.

## 0.1.0.0
### Bug-fixes:
	* Upgraded the transposition-table in module **Search.DynamicMoveData**, from merely recording moves (which doesn't include the rank to which a Pawn is promoted), to recording qualified-moves.
	* In function **Search.AlphaBeta.negaMax.descend.selectMax**, amended bound function **isFitter** to prefer shorter move-sequences where fitness is equal, & corrected the scenario in which all nodes were skipped because they were repetitious, but without ever defining alpha.
### Features:
	* Added the configurable runtime ability to asynchronously decompress PGN-databases, & to set a maximum number of games to read.
	* Added a configuration-option to normalise the values of specified piece-square tables into the closed unit-interval.
	* Modularised the packaged config-files, by defining XML **External Entities** in the DTD.
	* Added suggestions on failure to parse a user-command, & created a module **Text.AutoComplete** to contain common code.
	* Added runtime commands:
	-----------------------------------------
	Command				| Purpose
	--------------------------------| -------
	**availableMoves**		| to report all available moves from the current position.
	**maxPositionInstances**	| to reveal the maximum number of instances any available position has been visited.
	**reversiblePlyCount**		| to count the number of consecutive reversible plies that have been made.
	-----------------------------------------
	* Added **makefile** to facilitate common tasks.
	* Removed the configuration-option **preferMovesTowardsCentre** & its implementation in function **Cartesian.Coordinates.radiusSquared**, because of it's conceptually wobbly foundations.
### Command-line Options:
	* Added a new module **Input.CategorisedCommandLineOptions** to improved the partitioning of command-line options into functional categories.
	* Added a command-line option **--formatPieceSquareTableForGNUPlot** to print the piece-square tables in a format suitable for **GNUPlot**.
### Performance:
	* Included a compilation-flag **unboxedarrays**, to request the use of unboxed arrays where (infrequently) possible.
	* Changed data-type **Component.PieceSquareByCoordinatesByRank.EitherPieceSquareValueByNPiecesByCoordinates**, bringing type **Cartesian.Coordinates.ByCoordinates** inside **Either**, leading to significant space/time gains.
	* Constructed each large constant data-structure in parallel. Bracketed all data-parallel operations with CPP-conditionals controlled by the compilation-flag **threaded**.
	* Parallelised function **Attribute.CriterionValue.calculateWeightedMean**.
### Architectural:
	* Added new modules:
	-----------------------------------------
	Module				| Purpose
	--------------------------------| -------
	**Component.CastlingMove**	| Forked from module **Component.Move**
	**Data.Enum**			| Currently single-function.
	**Data.Foldable**		| Currently single-function.
	**Property.FixedMembership**	| Defines a class to which sum-types can conform.
	**StateProperty.Censor**	| Relocated from directory **State/**
	**StateProperty.Mutator**	| defines a class to express the dual implementations within **State.Board**.
	**StateProperty.Seeker**	| defines a class to express the dual implementations within **State.Board**.
	**Text.Case**			| Forked from **Text.ShowList** to contain case-related operations.
	**Text.Prefix**			| Forked from **Text.ShowList** to define the constant prefixes of log-messages.
	-----------------------------------------
### Testing:
	* Split **src-test/Main.hs** into **src-test/HUnit.hs** & **src-test/QuickCheck.hs**, each referenced independently from the cabal file.
	* Added an executable **duel** (to coordinate a battle between two independently configured instances of **bishbosh**) & a corresponding section-1 man-page.
	* Validated the list of ranks supplied to construct either **Attribute.RankValues.RankValues** or **Input.PieceSquareTable.PieceSquareTable**.
### Refactoring:
	* Flattened the nested array **Component.Zobrist.getRandomByCoordinatesByRankByLogicalColour**, by means of a composite index.
	* Reimplemented function **Cartesian.Coordinates.getLogicalColourOfSquare**.
	* Reimplemented function **Cartesian.Coordinates.interpolationsByDestinationBySource** in terms of function **Cartesian.Coordinates.extrapolationsByDirectionByCoordinates**.
	* Used the **LambdaCase** language-extension.