CPW-Engine_recognize

**[[Home]] * [[Engines]] * [[CPW-Engine]] * Recognizer**

[[code format="cpp"]]
#include "stdafx.h"

int is_rim[64] = {
	  1,   1,   1,   1,   1,   1,   1,   1,
	  1,   0,   0,   0,   0,   0,   0,   1,
	  1,   0,   0,   0,   0,   0,   0,   1,
	  1,   0,   0,   0,   0,   0,   0,   1,
	  1,   0,   0,   0,   0,   0,   0,   1,
	  1,   0,   0,   0,   0,   0,   0,   1,
	  1,   0,   0,   0,   0,   0,   0,   1,
	  1,   1,   1,   1,   1,   1,   1,   1
};


/* please note that this recognizer assumes that the position is legal, 
   i.e. side to move is not in check */

int isDraw() {

	/* no pawns */
	if (!b.PawnMaterial[WHITE] && !b.PawnMaterial[BLACK] ) {
		
		/* both sides have at most one minor piece - to guard against the possibility 
		   of a helpmate in the corner, we do not claim an immediate draw if the king
		   of the weaker side stands on the edge of the board */

		if ( b.PieceMaterial[WHITE] < 400 &&
			 b.PieceMaterial[BLACK] < 400 &&
			 ( !is_rim[b.KingLoc[WHITE] ] || b.PieceMaterial[BLACK] == 0 ) &&
			 ( !is_rim[b.KingLoc[BLACK] ] || b.PieceMaterial[WHITE] == 0 )	
		)
        return 1;

	}

	/* default: no draw spotted */
    return 0;
}
[[code]]
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