Short answers, pulled from the story.
Operation Kutuzov began on the 12th of July 1943 and ended on the 18th of August 1943, when Soviet troops reached the Hagen line east of Bryansk. It was the first of two Soviet counteroffensives launched as part of the Kursk Strategic Offensive Operation.
Operation Kutuzov was named after General Mikhail Kutuzov, the Russian general credited with saving Russia from Napoleon during the French invasion of 1812. The Red Army gave his name to its 1943 counteroffensive against Army Group Center.
Operation Kutuzov was fought in the Central Russian Upland against German Army Group Center, targeting the Orel salient held by the German 2nd Panzer Army and 9th Army. The offensive was carried out by the Soviet Western, Bryansk, and Central Fronts.
The Soviets launched Operation Kutuzov to collapse the German-held Orel salient and cut off the German 9th Army fighting at Kursk during Operation Citadel. It was designed to divert German reserves and let Soviet forces seize the strategic initiative.
German losses in Operation Kutuzov totaled 86,454 men killed, missing, or wounded, while Red Army casualties reached 112,529 killed and 317,361 wounded. The Red Army also lost 2,586 tanks and assault guns destroyed or damaged, making it the bloodiest of the three major Kursk operations.
Marshal Rokossovsky said the operation only pushed the Germans out of the Orel bulge instead of encircling them. He argued a stronger result was possible if Soviet forces had delivered two heavy punches meeting at Bryansk, and Marshal Zhukov held a similar view.