Write SQL query to solve given problem: How many times have coaches who were from CHI been awarded as NBA Coach of the Year?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(DISTINCT T2.coachID) FROM coaches AS T1 INNER JOIN awards_coaches AS T2 ON T1.coachID = T2.coachID WHERE T1.tmID = 'CHI' AND T2.award = 'NBA Coach of the Year'