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/////////////////////////////////////////////////////////////////////////////
// Name: ai/AlphaBeta.cpp
// Purpose: Alpha-Beta pruning MiniMax tree
// Author: Ben Boeckel
// Modified by: Ben Boeckel
// Created: Tue Oct 16 2007 09:09:44
// Copyright: ©2007-2008 Ben Boeckel and Nerdy Productions
// Licence:
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>.
/////////////////////////////////////////////////////////////////////////////
#include "Arena.h"
long Arena::AlphaBeta(AIProfile ai, Arena arena, const unsigned depth, const long alpha, const long beta)
{
long val;
if (!depth)
return ai.eval(Arena);
while (CanSimulate())
{
val = -AlphaBeta(Arena.Simulate(), depth - 1, -beta, -alpha);
if (beta <= val)
return beta;
if (alpha < val)
alpha = val;
}
return alpha;
}
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