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Games like chess that challenge the brain actually stimulate the growth of dendrites, the bodies that send out signals from the brain’s neuron cells. With more dendrites, neural communication within the brain improves and becomes faster. Think of your brain like a computer processor. The tree-like branches of dendrites fire signals that communicate to other neurons, which makes that computer processor operate at a fast, optimal state. Interaction with people in challenging activities also fuels dendrite growth, and chess is a perfect example.