You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
By all accounts, Phyrrus's choice to go to Sicily instead of Macedon and accept the throne was a strategic blunder for him. While capturing the island from both Carthage and Rome would have been good in the end he could not achieve it.
At first hailed as a liberator he did well until failing to take Carthage's main stronghold on the island, he failed to take it by siege so he opted to invade Carthage directly which did not turn out so well. The Greeks who had invited him did not want to man his ships as oarsmen and so when Pyrrhus tried to force them to they turned on him and force him to flee the island. By going to the island he also wasted time and allowed the Romans to reorganize themselves following his 'Pyhrric' victory.
If he had decided that going to Sicily would be a blunder and had instead marched east to take the Macedonian crown offered to him how would things have played out?