The revolving door at Zynga is spinning again after the struggling US mobile game maker announced that it has replaced its chief executive for the second time in less than a year.

The California-based company said in a statement on Tuesday that current board member Frank Gibeau will replace founder Mark Pincus as CEO beginning next Monday.

Mr Pincus, who only returned as chief executive last April following the departure of ex-Microsoft executive Don Mattrick, will stay on to serve as executive chairman of the Zynga board.

Zynga, whose games include FarmVille, Words With Friends and Zynga Poker, has been outflanked in recent years by King’s Candy Crush Saga and Supercell’s Clash of Clans.

Mr Pincus’s return has failed to stem the decline in its user base, despite the relaunch of mobile games such as Words With Friends and a record quarter for its Slots franchise. In the fourth quarter, average daily active users fell another 24 per cent year-over-year to 18m, as it saw declines across both desktop and mobile platforms over the year as a whole.

Shares in Zynga, down more than 19 per cent so far this year, jumped 5.1 per cent in after market trading on the news.

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