German show jumper Christian Kukuk grabbed Olympic equestrian gold on Tuesday after emerging first in a tense jump-off in the individual jumping competition. Kukuk, on Checker 47, managed the final without penalties along with Swiss rider Steve Guerdat and Dutch show jumper Maikel van der Vleuten. That prompted a jump-off and despite Kucuk being the slowest of the three in the final, the 34-year-old prevailed in the equivalent of a tie-break to give the German riders a fourth gold medal at the Paris Games. “The performance we delivered here was simply brilliant,” said Kukuk, the only rider wit…