Complex sentence: HIARCS 10 appears to have been the program used by the accomplices of Indian chess player Umakant Sharma, who was expelled from competitive chess for allegedly having the engine's moves illegally communicated to him via a Bluetooth device implemented in his headwear.
Split into simpler sentences: HIARCS 10 appears to have been the program used by the accomplices of Indian chess player Umakant Sharma in a cheating controversy. Sharma was expelled from competitive chess for allegedly having the engine's moves illegally communicated to him via a Bluetooth device implemented in his headwear.