Markos/Navara: The Secret Ingredient to winning at chess (paperback)The Missing Link in Your Chess Improvement Revealed by Two Grandmasters The Secret Ingredient isnt about openings or endgames its about everything in between. Its the practical guide every serious player didnt know they needed. Grandmasters Jan Markos and David Navara reveal overlooked elements that make the difference in real games: intelligent prep, focused mindset, smart time use, and the psychology of outplaying opponents before the first move.