314 	                                  unsigned char moveCode) {  in decodeMove()  argument
315 		moveCode &= 0x0F;  in decodeMove()
325 			int to = (toMove == WHITE) ? from + sqdiff[moveCode]  in decodeMove()
326 			                           : from - sqdiff[moveCode];  in decodeMove()
327 			return {to, promoPiece[moveCode]};  in decodeMove()
330 			int fylediff = square_Fyle(moveCode) - square_Fyle(from);  in decodeMove()
331 			int to = (moveCode >= 8) ? from - 7 * fylediff  in decodeMove()
338 			return {from + sqdiff[moveCode], INVALID_PIECE};  in decodeMove()
341 			if (moveCode == square_Fyle(from)) { // 2 BYTES MOVE  in decodeMove()
347 			int to = (moveCode >= 8) // a vertical move  in decodeMove()
348 			             ? square_Make(square_Fyle(from), (moveCode - 8))  in decodeMove()
349 			             : square_Make(moveCode, square_Rank(from));  in decodeMove()
353 			if (moveCode == 0) // NULL MOVE  in decodeMove()
356 			if (moveCode <= 8) {  in decodeMove()
358 				return {from + sqdiff[moveCode], INVALID_PIECE};  in decodeMove()
361 			if (moveCode == 9) // CASTLE QUEENSIDE  in decodeMove()
364 			if (moveCode == 10) // CASTLE KINGSIDE  in decodeMove()