300 Spartans: The Secret Life of Kings explores an often neglected part of strategy – how to turn the slow-moving king into a fighting piece.

Most players are under the illusion that the king “must be defended at all times.” A good rule of thumb for beginners…but a psychological shackle for serious improvers.

See How Much Your Tactical Powers
Can Grow in the Next 50 Days

If you’re an intermediate player — rated below 1900 — then this challenge can raise your tactics up a class or two in the next 50 days. All while simplifying your path to improvement into 10x daily puzzles.