Meanwhile, Breith’s III Panzerkorps was stuck in the mud south of the Gniloi Tikich. Recognizing that Vatutin had blocked his current axis of advance, he decided to regroup and attack eastward, where enemy defences were thinner. By this point, Breith had 140 tanks (incl. 80 Panthers and 12 Tigers) and 14 assault guns. On the morning of 11 February, Breith attacked with Bäke’s heavy tanks in the lead and advanced 8km in two hours. Within five hours, the Panthers had succeeded in capturing a bridge over the Gniloi Tikich at Frankovka. At this point, Breith decided to employ two
Vatutin always seemed to have another card up his sleeve and now he introduced General-leytenant Semyon I. Bogdanov’s 2nd Tank Army (3 TC, 16 TC, 11 GTB), which had been in the RVGK until a week before. Bogdanov moved four tank brigades directly into Breith’s path on 12 February, while the German spearheads were immobilized by lack of fuel. The German two-wheel drive Opel Blitz used by the supply echelons were virtually immobilized by the Ukrainian mud and proved to be the Achilles’ Heel of the relief effort. In addition, Kravchenko’s remaining armour and infantry from the 40th Army continued to attack Breith’s exposed flanks, which was a constant irritant. On 13 February, Breith finally had enough fuel to resume his advance and now von Manstein told him that it was ‘now, or never’ – he must reach Gruppe Stemmermann before it was crushed. Bäke advanced with 10 Tigers and 10 Panthers, followed by Kamfgruppe Frank from 1.Panzer-Division. Near the village of Dadushkovka, Bäke’s panzers ran into T-34s from Polkovnik Roman A. Lieberman’s 50th Tank Brigade (3 TC). One platoon of T-34s made the amateur mistake of trying to engage Tigers from a distance of 1,800 meters and paid for this ignorance in blood. However, the other T-34s were more cunning and remained in defilade positions near anti-tank guns, which forced the German panzers to get in much closer, where the T-34s could occasionally score. The tank battle lasted more than an hour, with the Germans claiming another Soviet tank brigade destroyed, but five Tigers and four Panthers were knocked out, leaving Bäke with just 10–11 functional tanks. Although Bäke managed to advance another 12km and reached Khizhintsy, he was still 10km from the pocket and once again out of fuel.
Konev’s forces captured the Korsun airfield on 13 February, abruptly terminating the Luftwaffe airlift. It was clear that Gruppe Stemmermann could only last a few more days. On 14 February, as a desperate expedient, Luftwaffe Ju-52s flew low over his tanks and dropped drums of petrol in the mud, most of which burst. Bäke received just enough fuel to make a small advance, but he could not reach the pocket and he was stopped by intense enemy resistance on Hill 239. That day, the thaw ended and it began to snow again, which hardened the ground. Kampfgruppe Bäke and Kampfgruppe Frank sparred with Bogdanov’s armour near Lisyanka, claiming another 19 T-34s from 5 GTC and some Shermans from 5 GMC, but four Tigers and three Panthers were damaged. With ammunition and fuel nearly exhausted and barely 20 tanks still operational, Breith’s relief effort ground to a halt at Lisyanka on 15 February. Vatutin simply ordered Bogdanov to place more tanks and anti-tank guns to bar any further advance, while the remainder of his forces and Konev’s reduced the pocket. One of the units that arrived to reinforce the 16 TC was Polkovnik Nikolai S. Grishin’s 13th Guards Heavy Tank Regiment, equipped with 21 IS-1 (IS-85) heavy tanks, equipped with the same 85mm D-5T as the KV-85. These heavy tanks were committed into action on 15 February and unwisely attacked Kampfgruppe Bäke instead of sitting on the defence; the Panthers and Tigers knocked virtually all of them out. Following this incident, the GABTU resolved to upgrade the new IS-series heavy tanks to the 122mm gun.