user15778: There is a variation of the Ruy lopez that I have recently played and made two sacrifices and ended up with a very good game, and I wanted to know if anyone else could or have tried it? Here is the move order:
[FEN ""]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5
5. Bb3 Na5 6. Bxf7+

Then the continuation that was played was
[FEN ""]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5
5. Bb3 Na5 6. Bxf7+ Kxf7 7. Nxe5+ Ke8 8. Qh5+ g6
9. Nxg6

and black resigned. This was all played with a 2+0 time control so I saw this nice little gambit.

user12873: 5...Na5 is interesting and it's hard for White to refute. Both 6. Nxe5 and 6. Bxf7+ are tempting options, but the best move is simply castling with 6. 0-0. White's plan is to push in the center with d4, and Black's Knight is missed on c6.
Sample line after 6. 0-0:
6...Nxb3 7. axb3 d6 (Black must protect the now undefended e5-pawn) 8. d4! exd4 9. Nxd4 (threatening to take on b5 due to the a-file pin) Bb7 10. Re1.
At this point, White has a nice edge. He has a good lead in development, and the Knight on d4 can jump to the f5-square at any point. While Black does have the two Bishops, his cramped position with barely any pieces out does not give him enough.
MVL recently played 5...Na5 in a rapid game though, so it's definitely a viable move. I doubt most people could find 6. 0-0 over the board if they hadn't studied the line previously.

user27581: WHITE CAN PLAY STRONGER! Thus, the newest chess opening theory ( https://jeromegambit.blogspot.com/2021/06/the-nightingale-gambit-etc-c70-c20-c60.html ) shows that after 6.Bxf7+!? Kxf7 7.Nxe5+ Ke7! 8.Nf7! Kxf7 9.Qh5+ g6 10.Qd5+ Kg7 11.Qxa8 Nc6 12.c3! N (Bukayev Yu. V.) the position is unclear. Here Yury V. Bukayev considered also 11...Qg5!? N and found that White has an enough success here too!

user12604: 
... b5 is quite uncommon in the Ruy Lopez. I was initially sceptical, but the gambit seems to be quite interesting, or at least not easily refutable. On amateur level, it seems to score pretty well, if you have a look at for example the database on lichess. However, amongst stronger players in long games black scores significantly more points. I would definitely try it in Blitz, but not in a long game. Ultimately, it seems, it's objectively at least equal or worse for the sacrificing party (as with almost every gambit). 

My evaluation:

little practical utility (literally nobody plays 4. ... b5, at least on my level)
unsound
probably fun at blitz


user16233: 7...Ke8?? is a blunder for black. Instead, 7...Ke7!? is a much better try with the idea of weathering the attack with moves like ...Nf6 ...d6 and ...Qe8 (not necessarily in that order). Hard to prove that white is winning.

15778: <p>There is a variation of the Ruy lopez that I have recently played and made two sacrifices and ended up with a very good game, and I wanted to know if anyone else could or have tried it? Here is the move order:</p>

<pre><code>[FEN ""]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5
5. Bb3 Na5 6. Bxf7+
</code></pre>

<p>Then the continuation that was played was</p>

<pre><code>[FEN ""]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5
5. Bb3 Na5 6. Bxf7+ Kxf7 7. Nxe5+ Ke8 8. Qh5+ g6
9. Nxg6
</code></pre>

<p>and black resigned. This was all played with a 2+0 time control so I saw this nice little gambit.</p>
 12873: <p>5...Na5 is interesting and it's hard for White to refute. Both 6. Nxe5 and 6. Bxf7+ are tempting options, but the best move is simply castling with 6. 0-0. White's plan is to push in the center with d4, and Black's Knight is missed on c6.</p>

<p>Sample line after 6. 0-0:</p>

<p>6...Nxb3 7. axb3 d6 (Black must protect the now undefended e5-pawn) 8. d4! exd4 9. Nxd4 (threatening to take on b5 due to the a-file pin) Bb7 10. Re1.</p>

<p>At this point, White has a nice edge. He has a good lead in development, and the Knight on d4 can jump to the f5-square at any point. While Black does have the two Bishops, his cramped position with barely any pieces out does not give him enough.</p>

<p>MVL recently played 5...Na5 in a rapid game though, so it's definitely a viable move. I doubt most people could find 6. 0-0 over the board if they hadn't studied the line previously.</p>
 27581: <p>WHITE CAN PLAY STRONGER! Thus, the newest chess opening theory ( <a href="https://jeromegambit.blogspot.com/2021/06/the-nightingale-gambit-etc-c70-c20-c60.html" rel="nofollow noreferrer">https://jeromegambit.blogspot.com/2021/06/the-nightingale-gambit-etc-c70-c20-c60.html</a> ) shows that after 6.Bxf7+!? Kxf7 7.Nxe5+ Ke7! 8.Nf7! Kxf7 9.Qh5+ g6 10.Qd5+ Kg7 11.Qxa8 Nc6 12.c3! N (Bukayev Yu. V.) the position is unclear. Here Yury V. Bukayev considered also 11...Qg5!? N and found that White has an enough success here too!</p>
 12604: <ol start="4">
<li>... b5 is quite uncommon in the Ruy Lopez. I was initially sceptical, but the gambit seems to be quite interesting, or at least not easily refutable. On amateur level, it seems to score pretty well, if you have a look at for example the database on lichess. However, amongst stronger players in long games black scores significantly more points. I would definitely try it in Blitz, but not in a long game. Ultimately, it seems, it's objectively at least equal or worse for the sacrificing party (as with almost every gambit). </li>
</ol>

<p>My evaluation:</p>

<ul>
<li><p>little practical utility (literally nobody plays 4. ... b5, at least on my level)</p></li>
<li><p>unsound</p></li>
<li><p>probably fun at blitz</p></li>
</ul>
 16233: <p>7...Ke8?? is a blunder for black. Instead, 7...Ke7!? is a much better try with the idea of weathering the attack with moves like ...Nf6 ...d6 and ...Qe8 (not necessarily in that order). Hard to prove that white is winning.</p>
