xpect.h

/*
	Ordo is program for calculating ratings of engine or chess players
    Copyright 2013 Miguel A. Ballicora

    This file is part of Ordo.

    Ordo 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.

    Ordo 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 Ordo.  If not, see <http://www.gnu.org/licenses/>.
*/


#if !defined(H_XPECT)
#define H_XPECT
/*>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>*/

#include "boolean.h"

#define STANDARD_DRAWRATE 0.5

extern double 	inv_xpect	(double invbeta, double p);
extern double 	xpect (double a, double b, double beta);
extern void 	get_pWDL(double delta_rating /*delta rating*/, double *pw, double *pd, double *pl, double drawrate0, double beta);
extern double 	draw_rate_fperf (double p, double d0);

/*<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<*/
#endif