a player uses to choose between the available actionable options. Every player in a non-trivial game has a set of possible strategies to use when choosing what moves to make. A strategy may recursively look ahead and consider what actions can happen in each contingent state of the game—e.g. if the player takes action 1, then that presents the opponent with a certain situation, which might be good or bad, whereas if the player takes action 2 then the opponents will be presented with a different situation, and in each case the choices they make will determine their own future situation. Strategies in game theory may be random (mixed) or deterministic (pure). Pure strategies can be thought of as a special case of mixed strategies, in which only probabilities 0 or 1 are assigned to actions. Strategy based games generally require a player to think through a sequence of solutions to determine the best way to defeat their opponent. Counterterrorism Strategy Because counterterrorism involves the synchronized efforts of numerous competing bureaucratic entities, national governments frequently create overarching counterterrorism strategies at the national level. A national counterterrorism strategy is a government's plan to use the instruments of national power to neutralize terrorists, their organizations, and their networks in order to render them incapable of using violence to instill fear and to coerce the government or its citizens to react in accordance with the terrorists' goals. The United States has had several such strategies in the past, including the United States National Strategy for Counterterrorism (2018); the Obama-era National Strategy for Counterterrorism (2011); and the National Strategy for Combatting Terrorism (2003). There have also been a number of ancillary or supporting plans, such as the 2014 Strategy to Counter the Islamic State of Iraq and the Levant, and the 2016 Strategic Implementation Plan for Empowering Local Partners to Prevent Violent Extremism in the United States. Similarly, the United Kingdom's counterterrorism strategy, CONTEST, seeks "to reduce the risk to the UK and its citizens and interests overseas from terrorism, so that people can go about their lives freely and with confidence." See also Concept Driven Strategy Consultant Odds algorithm (Odds strategy) Strategy game Strategy pattern Strategic planning Strategic management Strategist Strategy Markup Language Time management U.S. Army Strategist Further reading Burgelman, James. Strategy is Destiny (2002): Strategy Is Destiny: How Strategy-Making Shapes a Company's Future Freedman, Lawrence. Strategy: A History (2013): Strategy: A