user23598: Many chess players nowadays recommend the Rossolimo against c5-Nc6 Sicilian:
[fen ""]
1. e4 c5 2. Nf3 Nc6 3. Bb5


However, I find the open sicilian to be easier to play:
[fen ""]
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 13. g3 O-O 14. Bg2


One of the reasons of my preference is that I have control over the d5 square and black has a backward pawn on d6. Moreover, I can play moves like Qd3,a3, and play on the queenside with my rooks too.
My issue with the Rossolimo is that it gives up the bishop pair for no obvious outpost for the knight like the second position in the open sicilian that I shared above.
I would really appreciate it if you can tell me why the Rossolimo might offer better winning chances with White, and why top players are attracted to it, and why Black players try to avoid it in their repertoire. Also, if you can refer me to good thematic games with Rossolimo.

user12953: Obviously the Rossolimo is a less ambitious option than the Open Sicilian. It is, however, easier to learn for white, less risky and less sharp and so likely to be less the cup of tea of ardent Sicilian players. Those are probably the main reasons for its popularity.

user-1: I have been exploring these nowadays. I will give two reasons for why Bb5 is recommended for white and is beginning to overtake d4 as the main line.
First, unlike 2...d6 Sicilians, with 2...Nc6 Sicilians, Black can dictate variations if White enters an open Sicilian. To see this, we must start at Black's second move. After e4 c5; Nf3 d6; d4 cxd4; Nxd4 Nf6; Nf3, Black's a6 (the Najdorff) is not forcing anything on White who now has a million decent options to choose from: h3, g4, f3, a4, Rg1, Bg5, Be3, Bc4, etc. With Black playing 2...Nc6 though, there are far fewer options. Because this is a more active and developing move, unlike 2...d6, after random moves by White balck easily equalizes. After e4 c5; Nf3 Nc6, if White enters an open Sicilian (i.e. d4) then Black can force a Sveshnikov or White deviates early on from theory, which is a concession then and Black is fine in most sidelines. So, white should be prepared to enter a long sequence of theory lines as soon as he/she puts a pawn on d4 on move three. In mainline Sveshnikov, although Black's position looks scary it is proven time and again to be playable with a good fighting chance for a win.
As an e4 player you already spend half your life on all types of responses to e4 (take Najdorff itself for example). So, you begin to wonder why to enter such forced line against an opponent who is probably better equipped with theory and experience.
Once you decide to ditch a third move d4, then there are basically two objectively good moves for white: Bb5 and c3, with former being much stronger.
So, my second reason is Bb5 is indeed positionally a very logical and strong move. It is easy to see why. 1) Black's Nc6 is a great piece putting pressure on center, specially e5 and d4. So, it is good to make it uncomfortable. 2) Bishop develops to an active square and we are ready to castle, while Black has not touched their kingside, so we will be ahead in development. 3) The threat to double Black's pawns is serious and often Qc7 or Qb6 are too slow to avoid this.

user19861: The Rossolimo scores really, really well. According to the chess 365 database, white scores 56.8% with the Rossolimo and only 51% with the open. Also, stockfish gives a very slight edge to the Rossolimo.
Normally, I would say play the lines you like but I would never want to go into heavily theoretical lines against people better than me in their pet lines. The Rossolimo gives you an alternative that is probably as good but with less theory.

user18809: Please note that the ...e5 push Black does on your line is not forced and there are plenty of other variations Black can opt for (like 4...e6, or 4...g6, or 4...Nf6 5.Nc3 d6, or even 4...e5)
Each of this alternatives requires White to be prepared as Black will probably know a lot of theory about those (and have a good understanding of the resulting middlegame positions, for instance, no d5 weak square in many of those) With the Rossolimo, White can opt for a quieter game where knowledge of precise lines is less relevant

23598: <p>Many chess players nowadays recommend the Rossolimo against c5-Nc6 Sicilian:</p>

<pre><code>[fen ""]
1. e4 c5 2. Nf3 Nc6 3. Bb5
</code></pre>

<p></p>

<p>However, I find the open sicilian to be easier to play:</p>

<pre><code>[fen ""]
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 13. g3 O-O 14. Bg2
</code></pre>

<p></p>

<p>One of the reasons of my preference is that I have control over the d5 square and black has a backward pawn on d6. Moreover, I can play moves like Qd3,a3, and play on the queenside with my rooks too.</p>

<p>My issue with the Rossolimo is that it gives up the bishop pair for no obvious outpost for the knight like the second position in the open sicilian that I shared above.</p>

<p>I would really appreciate it if you can tell me why the Rossolimo might offer better winning chances with White, and why top players are attracted to it, and why Black players try to avoid it in their repertoire. Also, if you can refer me to good thematic games with Rossolimo.</p>
 12953: <p>Obviously the Rossolimo is a less ambitious option than the Open Sicilian. It is, however, easier to learn for white, less risky and less sharp and so likely to be less the cup of tea of ardent Sicilian players. Those are probably the main reasons for its popularity.</p>
 -1: <p>I have been exploring these nowadays. I will give two reasons for why Bb5 is recommended for white and is beginning to overtake d4 as the main line.</p>
<p><strong>First, unlike 2...d6 Sicilians, with 2...Nc6 Sicilians, Black can dictate variations if White enters an open Sicilian.</strong> To see this, we must start at Black's second move. After e4 c5; Nf3 d6; d4 cxd4; Nxd4 Nf6; Nf3, Black's a6 (the Najdorff) is not forcing anything on White who now has a million decent options to choose from: h3, g4, f3, a4, Rg1, Bg5, Be3, Bc4, etc. With Black playing 2...Nc6 though, there are far fewer options. Because this is a more active and developing move, unlike 2...d6, after random moves by White balck easily equalizes. After e4 c5; Nf3 Nc6, if White enters an open Sicilian (i.e. d4) then Black can force a Sveshnikov or White deviates early on from theory, which is a concession then and Black is fine in most sidelines. So, white should be prepared to enter a long sequence of theory lines as soon as he/she puts a pawn on d4 on move three. In mainline Sveshnikov, although Black's position looks scary it is proven time and again to be playable with a good fighting chance for a win.</p>
<p>As an e4 player you already spend half your life on all types of responses to e4 (take Najdorff itself for example). So, you begin to wonder why to enter such forced line against an opponent who is probably better equipped with theory and experience.</p>
<p>Once you decide to ditch a third move d4, then there are basically two objectively good moves for white: Bb5 and c3, with former being much stronger.</p>
<p>So, my second reason is <strong>Bb5 is indeed positionally a very logical and strong move.</strong> It is easy to see why. 1) Black's Nc6 is a great piece putting pressure on center, specially e5 and d4. So, it is good to make it uncomfortable. 2) Bishop develops to an active square and we are ready to castle, while Black has not touched their kingside, so we will be ahead in development. 3) The threat to double Black's pawns is serious and often Qc7 or Qb6 are too slow to avoid this.</p>
 19861: <p>The Rossolimo scores really, really well. According to the chess 365 database, white scores 56.8% with the Rossolimo and only 51% with the open. Also, stockfish gives a very slight edge to the Rossolimo.</p>
<p>Normally, I would say play the lines you like but I would never want to go into heavily theoretical lines against people better than me in their pet lines. The Rossolimo gives you an alternative that is probably as good but with less theory.</p>
 18809: <p>Please note that the ...e5 push Black does on your line is not forced and there are plenty of other variations Black can opt for (like 4...e6, or 4...g6, or 4...Nf6 5.Nc3 d6, or even 4...e5)</p>

<p>Each of this alternatives requires White to be prepared as Black will probably know a lot of theory about those (and have a good understanding of the resulting middlegame positions, for instance, no d5 weak square in many of those) With the Rossolimo, White can opt for a quieter game where knowledge of precise lines is less relevant</p>
