As they don't have it, their needing it is irrelevant to the actual circumstances in question. Averting Soviet participation in WWII in terms of an Axis-Soviet War altogether is required, as for it to feasibly happen with an OTL WWII situation puts the Allies in a set of binds as far as mundane military reality. However it's also worth noting that for all these claims about the Dukhla Pass, the longest battle of 1944-5 was the Siege of Budapest, an urban battle, so I need at least six citations that state that Soviet losses in the Dukhla Passes were higher than at say, Leningrad or the Dnepr.
Well, if you need 6 citations, I will Try to dig hem out. Of course, some of them will be from Russian, Czech, Slovak or Polish sources. But of course I may forget as with age I keep forgetting, so please remind me. Of course, I may only look up the numbers and write down 6 sources as I am also bit lazy.
But numbers just for Dukla pass battles were if I remeber correctly around 6500 for Czechoslovaks and around 20 000 KIA and MIA and 60 000 for Soviets WIA. That's app. Soviet casualties from Konigsberg.
Sources: SVOBODA Ludvik: Z Buzuluku do Prahy
RICHTER Karel: Apokalypsa v Karpatech.
Vojenske dejiny Ceskoslovenska.
JABLONICKY, Jozef: Povstanie bez legend.
From English AXWORTHY, Mark: Axis Slovakia only mentioned " unproportionaly high Soviet casualties"
Hate this IPad so Russian sources will look up tommorow if still interested.