bad luck soviet bomber formations

[Monaco]

Hello gents,
who has further infos on some incidents on the Eastern Front, when soviet bomber formations run into fierce interception by german fighters:

1) 810 BAP was formed in March 1942, in Lipetsk. Initially the regiment was a bombardment regiment with SB aircraft had. In March 1942 810 BAP flew to the Bryansk front, where in one departure to bombard the airfield Orlovsky (Orlovka, ca. 60km NNW of Bryansk) it lost all 18 (SB) aircraft. Only three people survived (of 54). In March 1942 II./JG.51 and II./ZG.1 were stationed at Bryansk with Bf.109F and Bf.110 respectively, but in the claim lists no such huge victory is indicated. Stab JG.51 and IV./JG.51 were based further to the north at Juchnow North/South with Bf.109F.

2) On 26.05.42 2 VA (former Bryansk Front, General-Mayor Fyodor Polynin) was ordered to help out in the Kharkov area. It´s bombers operating from airfields far to the North should meet fighter escorts of VVS-Southwestern Front (from E of Kharkov) at several meeting points and proceed to the battle area. Due to lack of coordination between the aviation commands the escorts missed the bombers on several occassions and the bombers sufferd heavy losses through Bf.109 interception.
On 26.05.42 enemy fighters shot down a Pe-2 crew of 24 BAP (223 BAD, 2 VA); 138 BAP (223 BAD, 2 VA, Voronezh Front) lost probably 6 Pe-2; 723 BAP (223 BAD, 2 VA, Voronezh Front) lost probably 4 Pe-2; 213 BAP (223 BAD of 2 VA on the Bryansk Front) lost probably 1 (totally about 12 Pe-2 crews were lost).
JG.3 claimed 6 Pe-2/"P-2" and JG.52 18 Pe-2/"BP-100" for the loss of 1 Bf.109F (60%) of 3./JG.52 and 2 Bf.109F of 9./JG.52 on this day (maybe not referring to this action). What were the real soviet Pe-2 losses?

3) On 27.05.42 723 BAP (223 BAD, 2 VA, Voronezh Front) lost probably 4 Pe-2; 213 BAP (223 BAD of 2 VA on the Bryansk Front) lost 19 crewmembers or the equivalent of more than 6 Pe-2; division commander Lieutenant Colonel I.K.Kosenko and the commander 24 BBAP, Hero of the Soviet Union Colonel Yu.N.Gorbko were lost. The squadron of 24 BBAP, which was led by the regiment-commander Gorbko, lost six Pe-2s. So this would ad up to some 16 Pe-2 lost.
JG.3 claimed 6 Pe-2/"P-2" and JG.52 16 Pe-2/"BP-100" for 1 Bf.109F of 9./JG.52 s/d in air combat on this day. What were the real soviet Pe-2 losses?

Thanks in advance!