Boris Surin was born in 1908.

He graduated from the flight school in Borisoglebskaya in 1934.

In June 1941, major Surin was commander of the 123 IAP of the 10 SmAD. The unit was at this time based in the Kobrin-Pinsk area. The unit was partially re-equipped with Yak-1s but as late as 19 June only twenty Yak-1s were assembled at Imenin airfield and the unit thus started the war still equipped with Polikarpov I-153s.

On 22 June 1941 he flew four missions in the Kobrin area and claimed his and the units first victory when he shot down a Bf 109 at 05:00.
Later during the day, he claimed two more Bf 109s but was unfortunately badly wounded in his last combat and crashed to his death upon landing.
123 IAP suffered badly during the first day losing nine I-153s and eight pilots and at 13:30 only twenty serviceable aircraft remained.

At the time of his death, Surin was credited with 3 victories claimed while flying biplanes.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1941
1	22/06/41	05:00	1	Bf 109	Destroyed	I-153		Kobrin	123 IAP
2	22/06/41		1	Bf 109	Destroyed	I-153		Kobrin	123 IAP
3	22/06/41		1	Bf 109	Destroyed	I-153		Kobrin	123 IAP

Biplane victories: 3 destroyed.
TOTAL: 3 destroyed.

Sources:
Aerohobby No.1'94, kindly via Alexey Andreev
All aces of Stalin 1936-1953 – Mikhail Bykov, 2014
Black Cross/Red Star Volume I - Christer Bergström and Andrey Mikhailov, 2000 Pacifica Military History, ISBN 0-935553-48-7
Polikarpov Biplane Fighter Varians - Yefim Gordon and A. Dexter, 2000 Wings of Fame Volume 17, London
Soviet Aces 1936-1953
Soviet Fighter Pilots 1936-1953 - Mikhail Bykov
Stalin's Eagles - Hans D. Seidl, 1998 Schiffer Publishing, ISBN 0-7643-0476-3
Additional information kindly provided by Yuri Shakhov.