Had to enjoy looking at that game!
Crushing vitory with 1. e4 2.Nf3 3.Bc4

I suppose moving N back to f6 is best but do you think black playing a6 was wrong? Perhaps Nf6 or Bc5 protects better.Then later pawn to D5 could counter the centre better.

Playing a6 before white moves Bishop you can argue but after white plays Bc4. That is a clear lost of tempo.
g5 was poor and the f6 is a clear loser. But g5 put black in an awkward, undefensible position and it is downhill from there. In the span of 3 or 4 moves black messed up his own position, gave away a piece, and then opened the door to your queen to put an end to the misery.

Black played the opening poorly before the game-losing blunder on move 9 (e.g., ...a6, ...g5), but even at move 9 he could have played ...d6 and still had a playable (albeit not so great) position. White would be quite a bit better, but it's still a game at least.
If you want to see good moves in response to 3. Bc4, check the game explorer or any other database.

Winning a game being a piece up and your opponent having hung a piece and played moves such as g5,a6 is hardly anything worth showing.

Winning a game being a piece up and your opponent having hung a piece and played moves such as g5,a6 is hardly anything worth showing.
Yet you commented on it. And pointed out key moves of the game!

Winning a game being a piece up and your opponent having hung a piece and played moves such as g5,a6 is hardly anything worth showing.
Yet you commented on it. And pointed out key moves of the game!
Yep.Deep analysis of such games will get you far!

Well it is a great illustration of when a player blunders and the other player capitalizes on it. Players on this site always want to know what to do when thier opponent plays indifferently well here is an example!
well... your opponent is a complete patzer. 3...a6 is the most passive move ever. And blundering a piece in one move is also not a smart thing to do :)

well... your opponent is a complete patzer. 3...a6 is the most passive move ever. And blundering a piece in one move is also not a smart thing to do :)
Sam-R just had his way, not me. I like to look over games like this to see when an opponent is behind can they still make a fight of it. Also if Blk did not make that critical last mistake what options does white have to attack?
I know e4 openings are tactical but never seen it like this unless white played a trap.
After 9...d6 there's no attack for the moment. But black has weakened his kingside with h6 and g5, so white can try long castle and attack with h4. Or do a short castle and break with f4.
After black defends with d6 you look at a way to get Qh5 or Qf3 to tie up with your bishop vs his king on f7. So you have to find attacks that open this line of attack, and that means finding a way to assault or distract his knight on f6....
There is nothing forced here. Those are things to eyeball as weak and potential if black continues to play poorly, to end it quickly.
You might see something like d6, O-O (let him take that pawn..), Bxe5, dxe5, Qf3 (attacking the knight and the coveted f7), ... if he is alert, he may pull knight back to f6. If not you have tons of potential from there. With any luck at all he plays exd4 and you play Qf7#. If he plays Nf6, he is still cramped and threatened, Re1 looks good to me....
All that is without a PC and I am a weak player. Run it past a PC if you want even better attacks and moves, but the things I am saying ... you could have found these lines, I would guess... nothing there is very "deep". Keeping up the temptation, Bd6 Re4. A player like this would need nerves of steel to not take that rook and get mated again.... and again, if he does not, its just a matter of keeping pressure up. He may castle out of your main attack lines but that pawn structure is too flimsy to stop you. Re4 may be a mistake with castle, hangs 2 pieces so if you do it, be sure your attack will win after.... anyway the idea is to just pile it on before he can organize a defense..
Another game found just looking around.
Sam-R just had his way. I have played 1. e4 before....
But never have i ever won like this. This king side atack/ collapse is just ...... I could not take my eyes away as i keep playing it over and over again. I had to study it to see if it could be repeated in my games. I doubt it.
Have to note his opponent was moving fast in this game as it ended the same day it started.
What would be black's move to get out of this other than 10... f6? It just looks bad as you try to play it out after this move.