Pick the best formation for you

4-4-2, normal

General: This is the standard tactic that's also the one that 99% of all coaches will pick for their first game. It has the advantage that no players need special instructions, thereby you get the maximum performance from all-round type players.
Strengths: Good homogeneous defence, strong attacking wings and a good central attack.
Weaknesses: Weak midfield.
Best counter-tactic: Playing three inner midfielders and defensive wing defenders takes the edge off this tactic, and then attacks are preferrably made on the wings.

4-4-2, 3 inner midfield players
General: A variation of 4-4-2 where two position changes leaves you with three inner midfield players at the expence of one winger. I prefer moving down a forward and pushing up a winger to take his position. This tactic is a very strong defensive alternative for a coach normally using 3-5-2 och 3-4-3.
Strengths: Good homogeneous defence, strong midfield, one strong attacking wing and a good central attack.
Weaknesses: Abandons one attacking wing, not as strong a midfield as the tactics with 5 midfield players.
Best counter-tactic: Since the tactic leaves one wing you can have a weak defence here and also try attacking on this wing. Of course, a skilled opponent will make it difficult for you to guess which wing...

4-3-3, normal
General: One winger moved into the attack
Strengths: Good homogeneous defence, one strong attacking wing, very strong central attack
Weaknesses: Very weak in midfield, abandons one wing
Best counter-tactic: The opponent has a very strong central attack. Use three inner midfield players to stop them from getting so far and pack your defenders into the middle. If you can foresee what wing the opponent will abandon, use that defender in a more central position.

4-3-3, 3 inner midfield players
General: Both wingers are moved into forward position and a forward is pulled back to inner midfield.
Strengths: Good homogeneous defence, very strong central attack, fair midfield
Weaknesses: Abandons both wings
Best counter-tactic: A very central tactic, defend centrally and attack on the wings. Pack the defenders into the center of the pitch.

4-5-1, normal
General: One attacker moved into inner midfield
Strengths: Using strong inner midfield players, this is one of the most solid tactics in the defence. The number of opponent attacks are reduced with a strong midfield and the few occurring attacks are met by a strong homogeneous defence.
Weaknesses: Weak attack, especially in the center
Best counter-tactic: Against this tactic it may be wise strengthening your midfield with an offensive central defender, since the opponents central attack may be weak. It's all about trying to gain control of midfield and attacking on the wings - you'll need a lot of attacks to score.

3-5-2, symmetric/asymmetric defence
General: Symmetric: a central defender moved into midfield. Asymmetric: a wing defender moved into midfield. This is Hattrick's most common formation for a good reason, with its offensive/defensive balance and strong emphasis on midfield. It also lets the manager vary the attack and defence greatly.Weaknesses: 3 defenders are bound to leave a weak spot somewhere.
Best counter-tactic: Try to attack where the opponent is weak and try to balance your defence against the opposition's attack. Many 3-5-2 coaches play with a winger towards the middle, some are
Strengths: Very strong midfield and strong attack
kind enough to always play the same wing into the middle ;). Finally: if you succeed in beating a 3-5-2 team in midfield, the game is practically won...

5-3-2, normal
General: One winger moved into central defence.
Strengths: Very strong central defence, fair central attack.
Weaknesses: Very weak midfield, abandons one attacking wing.
Best counter-tactic: Try to gain possession using three central midfield players. Try attacking on the wings, in the center it's bound to be crowded.

5-3-2, 3 inner midfield players
General: Both wingers moved into central defence, one defender moved up into midfield.
Strengths: Very strong central defence, fair central attack, fair midfield.
Weaknesses: Abandons both wings.
Best counter-tactic: Another very central tactic, defend centrally and attack on the wings. Pack the defenders into the center of the pitch.

3-4-3, normal
General: One defender moved into forward position, the most attacking standard formation.
Strengths: Very strong attack.
Weaknesses: Weak midfield and (similarly to 3-5-2) one weak spot in defence.
Best counter-tactic: Win possession or lose the game, it's as simple as that! Your opponent is very dangerous so try to move play into his half of the pitch. Then adapt your attack according to the advice in the 3-5-2 section.

3-4-3, 3 inner midfield players
General: One defender is moved into midfield position and one winger into the attack. A very strong attacking formation. If you are superior to your opponent, this formation will guarantee a large number of goals and goalscoring opportunities (but you do lose attacking strength on one wing). You might even consider using an offensive wing defender too, to strengthen a wing attack.
Strengths: Very strong ce attack and one very strong attacking wing. Strong midfield.
Weaknesses: One weak spot in defence and abandons one wing.
Best counter-tactic: Concentrate your defence on the centre and the attacking wing (if predictable). Try to attack in the weak spot. If you can't control midfield, 4 defenders would be a good idea.

5-4-1, normal
General: One attacker moved into defence.
Strengths: Rock-solid central defence
Weaknesses: Weak midfield and attack, especially the central attack.
Best counter-tactic: Like 4-5-1 it may be a good idea to use an offensive defender. Defend your wings carefully if your opponent doesn't use his wingers towards the middle. Try to win possession and attack on the wings.

5-4-1, 3 inner midfield players
General: One attacker moved into midfield and one winger into central defence. One of the strongest defensive formations in Hattrick.
Strengths: Rock solid defence, strong midfield.
Weaknesses: Weak attak, especially the central attack and the abandoned wing.
Best counter-tactic: The opponent is rather weak in his attacks. Use this to gain control over midfield, an offensive central defender has never been more appropriate. Attack on the wings and prepare for 0-0...