Well, what do you mean by a long game in chess? Based on my experience you can double that for go, as go is naturally a long game, with many moves.

As a beginner in go, I played fairly slowly, which meant about 15 sec. per move, on average. Years ago, Bruce Wilcox recommended that beginners play 4 times as fast, around 4 sec. per move. I would call that blitz go. Today I think that a lot of go players take 30-40 sec. per move, on average.

Edit: I corrected the average times per move.

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.

That is the funny thing: Tournament games in chess are mostly 2h basetime plus some extra after move 40(or similar time with Fisher modus, so 1:40h +30s/move+ some extra after move 40), so they are considerably longer than "long" go games, despite having less than half of the expected number of moves.

Well, I was not thinking about tournament play. When I was playing amateur chess (non-tournament), a game took about 30 min. In Japan amateur go games (non-tournament) took about 1 hr. At that time most pro go games took about 11 - 12 hrs., but could go longer in byoyomi, OC. The games started at 9:00 a.m. and, with breaks for lunch and supper, most finished before midnight, but some continued well past that time. Title matches alloted two days per game.

In any event, I don't think that anyone is recommending that chess beginners take 4-5 hours per game.

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.

I was originally going to argue this point, but now I have more mixed opinions. I just played a game with 10:00 + 10x20 time controls, and I felt like I was *constantly* right up against the byo-yomi timer trying to get my moves in. It was a complete adrenaline-fest! Rush rush rush! What a terrible idea, how can anyone reasonable possibly play this quickly??!!

On the one hand, I was in a terrible head-space, and playing some very questionable go at times. On the other hand, I actually went and looked at the game record, and out of the first 81 moves (during which I used the ten minutes of main time), the number of moves that *actually* took over 20 seconds was... three. (22, 23, and 33 seconds, in particular.) Near as I can tell there's no way to extract actual move times once one is in byo-yomi time, but despite feeling like I was always on the edge of it I didn't end up using any of the ten byo-yomi periods at all!

Feeling rushed is, I think, still generally awful, but it's probably helpful to learn that, really, 20-30 seconds is actually pretty reasonable! Also, if one happens to be playing bots on KGS, note that the open offers generally have reasonably tight time controls (see the aforementioned 10:00 + 10x20s), but there are lots more bots sitting there waiting for game offers that will happily play on whatever time you like.