BenzenePlayer Class Reference

Abstract base class for all players using the Benzene systems. More...

#include <BenzenePlayer.hpp>

Inheritance diagram for BenzenePlayer:

Public Member Functions
	BenzenePlayer ()
virtual	~BenzenePlayer ()
HexPoint	GenMove (const HexState &state, const Game &game, HexBoard &brd, double maxTime, double &score)
	Generates a move from this board position.
bool	SearchSingleton () const
	Search states with only a single move?
void	SetSearchSingleton (bool flag)
	See SetSearchSingleton().
virtual std::string	Name () const =0
	Returns a unique identifier for this player.
Protected Member Functions
bool	FillinCausedWin () const
virtual HexPoint	Search (const HexState &state, const Game &game, HexBoard &brd, const bitset_t &consider, double maxTime, double &score)=0
	Generates a move in the given gamestate.
Protected Attributes
bool	m_fillinCausedWin
HexColor	m_fillinWinner
Private Member Functions
HexPoint	InitSearch (HexBoard &brd, HexColor color, bitset_t &consider, double &score)
	Finds inferior cells, builds vcs.
HexPoint	CheckEndgame (HexBoard &brd, HexColor color, bitset_t &consider, double &score)
Private Attributes
bool	m_search_singleton

Detailed Description

Abstract base class for all players using the Benzene systems.

Definition at line 19 of file BenzenePlayer.hpp.

Constructor & Destructor Documentation

BenzenePlayer::BenzenePlayer ( ) [explicit]

Definition at line 14 of file BenzenePlayer.cpp.

BenzenePlayer::~BenzenePlayer ( ) [virtual]

Definition at line 20 of file BenzenePlayer.cpp.

Member Function Documentation

HexPoint BenzenePlayer::CheckEndgame	(	HexBoard &	brd,
		HexColor	color,
		bitset_t &	consider,
		double &	score
	)			`[private]`

Definition at line 85 of file BenzenePlayer.cpp.

References benzene_bitset< _Nb >::any(), benzene_bitset< _Nb >::count(), BitsetUtil::FindSetBit(), HexAssert, INVALID_POINT, EndgameUtils::IsDeterminedState(), LogInfo(), m_search_singleton, EndgameUtils::MovesToConsider(), and EndgameUtils::PlayDeterminedState().

Referenced by GenMove().

bool BenzenePlayer::FillinCausedWin ( ) const [inline, protected]

Definition at line 86 of file BenzenePlayer.hpp.

References m_fillinCausedWin.

Referenced by PerfectPlayer::Search().

HexPoint BenzenePlayer::GenMove	(	const HexState &	state,
		const Game &	game,
		HexBoard &	brd,
		double	maxTime,
		double &	score
	)			`[virtual]`

Generates a move from this board position.

If the game is already over (somebody has won), returns RESIGN.

Derived Benzene players that use different search algorithms should not extend this method, but the protected virtual method Search() below.

If state is terminal (game over, vc/fill-in win/loss), returns "appropriate" move. Otherwise, calls Search().

Bug:: Subtract time spent to here from max_time after each step.

Implements HexPlayer.

Definition at line 27 of file BenzenePlayer.cpp.

References CheckEndgame(), InitSearch(), INVALID_POINT, LogInfo(), Search(), and HexState::ToPlay().

Referenced by MoHexEngine::DoSearch(), WolveEngine::GenMove(), PlayAndSolve::PlayerThread::operator()(), and BookBuilder< PLAYER >::Worker::operator()().

HexPoint BenzenePlayer::InitSearch	(	HexBoard &	brd,
		HexColor	color,
		bitset_t &	consider,
		double &	score
	)			`[private]`

Finds inferior cells, builds vcs.

Sets moves to consider to all empty cells. If fillin causes terminal state, sets m_fillinCausedWin to true and recomputes fillin/vcs with ice temporarily turned off (so it can pass the players a non-empty consider set).

Definition at line 52 of file BenzenePlayer.cpp.

References GroupBuilder::Build(), HexBoard::ComputeAll(), EMPTY, StoneBoard::GetEmpty(), HexBoard::GetGroups(), HexBoard::GetPosition(), Groups::GetWinner(), HexAssert, IMMEDIATE_LOSS, INVALID_POINT, Groups::IsGameOver(), LogInfo(), m_fillinCausedWin, m_fillinWinner, RESIGN, StoneBoard::SetPosition(), HexBoard::SetUseICE(), and HexBoard::UseICE().

Referenced by GenMove().

virtual std::string HexPlayer::Name ( ) const [pure virtual, inherited]

Returns a unique identifier for this player.

Implemented in MoHexPlayer, HandicapPlayer, PerfectPlayer, and WolvePlayer.

virtual HexPoint BenzenePlayer::Search	(	const HexState &	state,
		const Game &	game,
		HexBoard &	brd,
		const bitset_t &	consider,
		double	maxTime,
		double &	score
	)			`[protected, pure virtual]`

Generates a move in the given gamestate.

Derived players must implement this method. Score can be stored in score.

Parameters:

	state	Position and color to play.
	game	Game history up to this point.
	brd	Board to use for work.
	consider	Moves to consider in this state.
	maxTime	Max time available for move.
	score	Score of the move to play.