Halifax, MA – May 18, 2013 – The long-awaited $25,000 Fieldstone Grand Prix was hot with competition this afternoon for the fourth day of the Fieldstone Spring Festival. It came down to eight horses in the jump-off, vying for the coveted first place finish. Penny Brennan and Sun Tzu proved victorious, blazing the way from the start of the jump-off with one of only four double-clear efforts.