Cut a 1 1/2-inch lengthwise slit in each chile, then add to skillet along with onion, peppers, and chorizo and reduce heat to moderate. Cook, uncovered, stirring frequently, until vegetables are softened, 5 to 6 minutes. Add wine and boil until reduced to about 1/4 cup, 3 to 4 minutes. Discard chiles, then add pepper mixture to potatoes along with salt and pepper to taste and toss well. Serve warm or at room temperature.