High forts and no retreat

[Pionpion]

I've made some attacks on Forts in Oranienbaum (4) and Voronezh (3) in Clear and Snow Weather, my odds were always higher than 2:0 and nevertheless I failed several times to take the hex. Why ? Is there any changes in 1.12.05 ? Is this regular combat result ? Thanks

[Mehring]

You need to pile on heavy arty and engineers in v12, to help degrade the forts. No automatic retreat anymore. Nice, I think, but needs some fine tuning.