Guanare is unbeaten from three starts since moving into the Rick Dutrow barn, and the Runhappy colt stretches out around two turns for the first time in Tuesday’s $75,000 City of Brotherly Love, a mile and 70-yard stakes for 3-year-olds at Parx Racing. “I think the more he matures, definitely more distance just because of how smooth of a horse he is,” jockey Romero Maragh said in the winner’s circle after Guanare’s most recent race, a 2 3/4-length victory over only two others in Laurel Park’s Spectacular Bid Stakes at seven furlongs on Jan. 27. “He’s not overly keen, but he’s one to settle and he can make a run whenever you need him. He’s a push-button horse, so I think the longer the better.” American War Hero also last raced in Maryland, finishing an unlucky fourth