cassio.h File Reference

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Functions
void *	engine_init (void)
	Create a new Othello engine.
void	engine_free (void *)
	free resources allocated
double	engine_midgame_search (void *, const char *, const double, const double, const int, const int)
	Midgame search.
int	engine_endgame_search (void *, const char *, const int, const int, const int)
	Endgame search.
void	engine_stop (void *)
	Stop searching.
void	engine_print_results (void *, char *)
void	engine_empty_hash (void *)
	Empty (ie completely clear) the engine hash table.
void	engine_loop (void)
	Loop event.

Detailed Description

A simple protocol to communicate with Cassio.

Date

1998 - 2017

Author

Richard Delorme

Version

4.4

Function Documentation

engine_empty_hash()

void engine_empty_hash

(

void *

v

)

Empty (ie completely clear) the engine hash table.

Parameters

v

Engine.

engine_endgame_search()

int engine_endgame_search	(	void *	v,
		const char *	position,
		const int	alpha,
		const int	beta,
		const int	precision )

Endgame search.

Practically, Edax does the same things than in midgame search, with depth set as the number of empty squares. In case (beta - alpha) < 1, Edax will reajust beta so that beta = alpha + 1.

Parameters

v	Engine.
position	String description of the position.
alpha	Alpha bound.
beta	Beta bound.
precision	Probcut percentage.

engine_free()

void engine_free

(

void *

v

)

free resources allocated

Parameters

v

Engine.

engine_init()

void * engine_init

(

void

)

Create a new Othello engine.

Allocate engine resources & launch user-input event thread.

Returns

A pointer to a newly allocated engine structure.

engine_loop()

void engine_loop

(

void

)

Loop event.

engine_midgame_search()

double engine_midgame_search	(	void *	v,
		const char *	position,
		const double	alpha,
		const double	beta,
		const int	depth,
		const int	precision )

Midgame search.

Edax evaluation resolution is only one disc, so the doubleing point accuracy is not actually used here. In case (beta - alpha) < 1, Edax will reajust beta so that beta = alpha + 1. For some depths, extension-pv heuristics will return endgame score.

Parameters

v	Engine.
position	String description of the position.
alpha	Alpha bound.
beta	Beta bound.
depth	Search depth.
precision	Probcut percentage.

engine_print_results()

void engine_print_results	(	void *	,
		char *	)

engine_stop()

void engine_stop

(

void *

v

)

Stop searching.

Parameters

v

Search.