Capture the flag, the idea is simple you take the opponents flag and capture it by using it on your teams flag.
Execution is not as easy so start with here's a few things you'll need to know to start.
Basics
There's 3 types of people in a ctf
Player Job
Defenders > Defend the flag from being taken and if that happens prevent it from leaving the base
Wallers > Place strategic walls to both hinder your opponents and help your team
Flaggers > Get the opponents flag and bring it back to your base.
Note: When joining a ctf all basic resources, refresh,heal,cure,strength,agility pots and regs are unlimited to try to carry some with you to make your job 10x easier.
Now you have the appropriate equipment and idea of what you're doing you may wish to make a key for these spells/macros to improve your game.
Wall of stone, Easily the most useful spell in a ctf it should be used at every chance possible at it hinders movement.
Double click flag macro
Is adequate it allows you to pick up a flag without clicking it and double click it in your back pack to pass.Assistant.Macros.DoubleClickTypeAction|5671|True
All names: you can hotkey this in your uo options it'll give you a short lag spike if there's alot of people but it's very useful for catching players trying to hide behind parts of the map.
Flag refreshing
A very important part of ctfs so make sure u read this.
From the moment a flag is taken from the base you have 180 seconds for it to be captured or it will immediately kill the carrier and return to base. A way developed by players to get round this is for the flag carrier to suicide and have another team member grab it within 10 seconds so it doesn't return to the opponent base. DO NOT HEAL PEOPLE SUICIDING WITH THE FLAG IF THERE IS NO OPPONENT NEAR BY.
Now onto each role and how you should play it.
Defending
Recommended templates:
Tank mage
100/25/100
Macing/swords,eval int,meditation,tactics, Magery, resist/anatomy, wrestling
Dexer/medi dex
Fencing/swords, tactics, magery,meditation/poisoning, anatomy, healing , resist
As a defender your job as you already know is to prevent the other team from getting your flag the best way to do this is with a waller/synchronization.
Step 1 Wall up a choke point
step 2 hack at them.
It's a pretty easy job and not really something I need to go into detail with.
Here are the best spots for returning a flag due to the open are and the lack of LOS blocking on spells
Or spots similar