Movement quiz

[Taifun]

Summer 1941.
Japanese forces are approaching the Chinese Capital. My brave invading infantry managed to destroy the defending Chinese infantry corps defending the fort across the mayor river. The Japanese 1t light tanks are waiting behind to capture the strategic hex with full 5 Action points remaining. But they aren't able to capture the enemy hex. It should take them 4 points: 1 to move north along the mountain road and 3 to enter the vacant enemy hex (1+1 mayor river+1 enemy ZoC) and still have 1 remaing Action point. What I am missing here, any ideas?

[Nginear]

It could be muddy conditions. You don't benefit from dirt roads at that point. Put the cursor on the hex and look in the bottom left of the screen. It will show hex coordinates and weather conditions.

[Taifun]

Thanks Nginear, you are right the weather was muddy! I didn't notice visually.