It's Bird's opening, and you are correct, White did not play well.
New line in the Ruy?
Bird's opening???!! I was under the firm impression that Bird's opening involved a flank style attack, in fact for white, not black. If I'm not mistaken, it's actually 1. f4.
This game clearly begins with the Ruy Lopez.

It's Bird's opening, and you are correct, White did not play well.
it's the bird variation not the bird opening
You must be reffering to the Bird's defence and if so, yes, perhaps this is that defence come to think of it. But your wording was incorrect.
Yes, I believe the name is Ruy Lopez, Spanish Variation - deferred Bird defence.
So - is the deferred game clearly in benefit of white, or black?
I guess what I would like to know is - is it well playable?
well yes, maximus, that much is evident, as with most openings. However, the question is not wether or not it has been thought of or not, it's how much, by whom and what hidden advantages have yet to be exploited in them?
In other words, perhaps this is the best line given proper continuation play. My question essentially is: how effective has this defence been/is in modern play?


From Wikipedia:
Bird's Defence
Bird's Defence (ECO C61), 3...Nd4, is an uncommon variation sometimes played in the hope of surprising White into making a mistake in unfamiliar positions. With careful play White is thought to be able to gain a small advantage.
This defence was published in 1843 in Paul Rudolf von Bilguer's Handbuch des Schachspiels and explored by Henry Bird in the 1850s. Henry Bird himself played it as Black no fewer than sixteen times with a score of +6=2−8 (6 wins, 2 draws, 8 losses). Bird's Defence was later used a few times in tournament play by Siegbert Tarrasch, Boris Spassky, and Alexander Khalifman. Although it is still played occasionally as a surprise, no strong master since Bird has adopted it regularly.
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Looks like you were a good 166 years late on your discovery.
well saccadic, if you had bothered to actually read the comments that were posted, you'd know that I'm trying to find out how playable it is, and that's it. 'New' is a relative thing - if it is unfamiliar to most players now, then for them it is new.
You often make little trite remarks like that I've noticed. Grow up!

In that case, why Bd3? White might not have brought out his bishop at all if he would so quickly retreat to Bd3. It means that White's Queenside Knight and Bishop have one less path to development (Bishop passing d3, and Knight d2).
This opening is still quite playable it would seem. The following game only lasted 20ish moves before white resigned - this counterattack line in the Ruy proved devastating!!!
I just employed it in a recent game with a fellow 1500 rated player to great success - check it out, it's a good game!

Nothing wrong with 4 Nxd4:
Actually I checked out several of those games where white won with 4. Nxd4 and in each of those cases, Black failed to play agressively enough with the resulting position - they focussed too much on securing the advanced pawn instead of creating further threats in the opening and allowed white to 'out-develop' them in each case I saw. (I did examine a good dozen or so to make sure).
My contention is that the book move, not these shady stats based on a mere 2000 piddling games, "Defferred Bird defence" line involving Ba4 is better. It is all rather obscure to most though, which is why the lines of play are unclear up until now, because my contention is that there is still some exploring to do here!
If I'm wrong, then perhaps some good examples of why Ba4 is bad specifically, or how 3. ... Nd4 !? spells certain doom for black, would be suitable.

Nothing shady about the stats (Chess.com Database), and not "piddling" either.... Master games! To my knowledge (I first saw Bird's Defence more than thirty years ago, as a beginner), 4 Nxd4 has always been considered White's best move. Not certain doom though, just a little edge.
"An innacuracy - I think 4. Ba4 is the preferred response".... Nxd4 clearly not an inaccuracy and also preferred (by Masters anyway, you are free to prefer whatever you wish).
p.s. BTW Good game!
I've been experimenting with a new opening response to the Ruy Lopez, with varying success, but by and large the stats give it the advantage thus far. Not sure if it's because oponents are just thrown off by it or not, halloween gambit style, or because it is actually effective. I have managed some great situations such as this latest game for instance:
Though my oponent did not play optimally, I have had other good experiences with this opening. Just wanted to hear thoughts/opinions/analyses to see if anyone has any experience with this.Is this a new possible line in the Ruy Lopez?