DKI Jakarta - Jakarta Utara
Yes, the pinning has just confused me. If I now move up a ship to the combat hex, then it is held, but I can just attack with only 2 or 3 ships although there are 4 by the enemy.
But now when I attack with only 3 ships, then the other player can still move away with one of his ships, right?
Yes. Attacking a hex is a part of movement. When you move your ship(s) into a hex containing other player's ships or with GCDS or ancient one, you're considered to attack. And thus, your engaging ship(s) are pinned.
If you move 1 ship to a hex containing 1 or more ships, your ship is pinned. If you move 2 or more ships to a hex with 1 ship (other player's ship / ancient one), 1 of your ships is pinned (the rest can be moved next). Note that GCDS pin all ships.