WASHINGTON — Chris Clark scored the deciding goal in the 11th round of the shootout, and backup goalie Semyon Varlamov came on in relief and carried the Capitals to a 5-4 comeback win over the Islanders.

Alexander Semin, who scored two regulation goals, gave the Capitals a 1-0 lead just 8 seconds in, but the Islanders ended starting goalie Jose Theodore’s night with three quick goals. The Isles scored three times on five shots against Theodore. Varlamov stopped 24 of 25 shots and then sealed the win by denying Mark Streit’s shootout attempt in the 11th round.