Some Plan came home alone after a dramatic renewal of the Frank Ward Solicitors Arkle Novice Chase at Leopardstown.Four horses set outin search of Grade One honours, but Henry de Bromhead's nine-year-old was the sole finisher after Royal Caviar came down at the final fence when two lengths in front of Some Plan.Davy Russell could then just coast home on Some Plan (100-30) to complete a fine week for owner Roger Brookhouse following the victory of stablemate Champagne West in the Thyestes Chase at Gowran on Thursday.The field was reduced to two early on in proceedings after Identity Thief - also trained by De Bromhead - departed at the first fence. That was quickly followed by the exit of the well-backed 15-8 favourite Bleu Et Rouge at the third.Ruby Walsh looked to have control of the race on Royal Caviar but hopes of a hat-trick for him and Willie Mullins, after the wins of Melon and Let's Dance in the first two races, vanished at the last obstacle.