I'm guessing Chip Kelly wanted a challenge.

WSJ: Chip Kelly: Torn Between Two Birds��Oregon Ducks, Philadelphia Eagles

But the 45-year-old duffed his chip on the 15th to double bogey, leaving Wilson to challenge Casey.

BBC: * won at first play-off hole

In particular, reducing the power demands of a chip design philosophy traditionally attached to large batteries or power supplies has been a challenge.

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