Yeah around move 28-ish perhaps his mind was too focused on the tactics, rather than on analyzing the situation in front of him. He has to think, in the future, he's not going to want to have to deal with the d file being a problem like that, even if he can temporarily avoid losing the material with a temporary resource or two. Perhaps he felt he had some saving resources like 30 Rc1, but the d file situation may last a while so you always have to very carefully look for ways to maintain a pin like that because the possible gains (or losses if you're the one in the pin) are potentially huge.
Brussels Chess Club closed tournament - spring 2015

Right, <Elubas> - and nice to have this dialogue going again!
Unless he clearly saw the whole piece-winning idea, including that amazing Bg5!! resource to come out of it - he should never have captured that rook on d2... just take the perpetual.
But this is sober thinking, after the fact.
When taking on d2, he was under the impression that he was simply winning - as that moment of glory of playing Rxc7 check was still strongly embedded in his mind.
Taking on d2 on move 28, as after all - the B and N can still come back to f4 and c7, his own R is still on the 7th - and threatening my undefended bishop, and obviously I can't take the knight, can I (?) So why not grab a rook in the meantime, and get a material advantage, on top of a crushing attack? What can go wrong?
Oh, ...Bg6! Didn't see that. Oops!

Brussels Chess Club has changed its address. It's now in Avenue Brugmann, not far from place des heros

So you lived there before 1972? I suppose there have been at least some changes... but the area is still very nice and pleasing

I only went through main lines of your variations. "Theoretical lines" up to move 36 is a bit too much

This wasn't any "theory" up to move 36 there - it was a complete game played in that line.
The theoretical discussion only goes as deep as I suggest variations and write verbal notes... after that everything is for demonstration (and enjoyment) purposes only.

I showed this game to my daughter Tamara.
When I told her that 10...0-0-0 was probably a more precise move than 10...Nc5, she said - "and why not 10...Bc5? This is a very good diagonal for that bishop!"
Right, Tamara!! A very good diagonal - and also deprives black of his next move. I still owe her the precise explanation, demonstration and analysis of why this so intuitive move falls short of the other two options.
Later, when discussing 28...Bg6! which suddenly turns a hunter (white in this game) into prey - she suddenly came up with this brilliant defensive resource - 29. Rf2!. She explains: "the rook keeps the open file, so there is still the threat of mate. Meanwhile it protects the bishop, so that the knight can leave".
Hmmmm, I said... let me see - what is wrong with that?
I couldn't find anything - so I fired up Houdini - turns out that guess what? 29. Rf2 is its first choice, with an evaluation of +0.00
How to develop such a kid's talent here in Belgium?

She's 10 - but isn't yet of tournament level. I only want her to go when she's ready - that is, if she really shows that kind of interest...

You develop so quickly at that age. I started tournament chess when I was 13 and I wish I started sooner.

Yeah, parents go into fits stressing their kids to death because of this supposed "fast development" factor.
Finally they stop doing whatever that parent was trying to push them to do, and need to see a shrink for 15 years or something...

For sure. But merely exposing her to tournament chess is not really stressing. When I first started playing in tournaments I didn't know what to expect, and was still semi-casual, but I totally got into it. It's not just fast development either; when you don't have job obligations and such that is the perfect time to spend on things like chess or some other passion/hobby. You don't want to realize you're good at something when it's "too late" or when you can't devote a lot of time to it.

So - after starting with 0.5 out of 4, I did manage to use the three remaining rounds to pull back to 50%, keeping my modest rating intact (even gaining three extra points, I think).
Here's the last effort, from yesterday night - against Francois Haulotte, a 1714-rated player with very enterprising and dangerous play, who in this tournament suffered from bad luck and didn't manage to make much of many great opportunities he had, also against players rated over 2000.
With better concentration and some theoretical preparation - especially at the endgame stage - his final result would have certainly been much better, and deservedly so!
Here's our game:
So, quietly and behind the scenes I'm already six rounds into this tournament.
The beginning wasn't so brilliant, as I lost three of my first four games (against Ivan Ronse (FIDE 1936 who won brilliantly in under 20 moves - and in the Petroff!), Sergio Zamparo (FIDE 2039) and a Kazakh guy with FIDE 2020, whose rather complicated name eludes my memory no matter how many times I'm reminded of it), only drawing one game with black against the FIDE-2135 rated Pierre Vogel.
Round five was a nice win (against Gerald Grodent, rated FIDE 2065, who had an impressive 4 points out of 4 entering that game) - and tonight was round six.
A pretty catastrophical start - but suddenly things aren't even remotely so bad anymore. I hope you like this game :-)
Can anybody actually go over this whole annotated game? Let me know if you managed to.