19 July 2016

Publishing chess games online in 2016

It's time again to look at options for publishing chess games online, as the post Publishing Chess Games in 2013 (updated) is still helpful but now significantly behind the latest tools, especially after ChessBase made a recent huge update to its replayer.

My criteria for using an online publishing tool haven't changed.  Here are what I consider to be necessary features:
  • Display full annotations (symbols and text)
  • Variations contained in annotations are displayed on the board
  • Board and annotations must be visible together (the board cannot scroll off the page)
  • Board should be flippable (White or Black can be displayed at the bottom)
  • Can use either mouse or arrow keys to go through the moves
  • Can publish a full game as part of a self-contained blog post 
I'll again use the first annotated game published here (Annotated Game #1, a simul encounter that I drew against GM Walter Browne), as the sample for four major common online publishing tools for comparison.  I'll put the ChessBase one last, since it's the most advanced and also the most recent.  If readers have a different favorite replayer than one of the listed ones, I'd be interested to see comments as to why, along with the URL.

Technical notes:
  • Many game replayers will need to have some of their functions linked/embedded in your blog's stylesheets (CSS), which can be done relatively simply via copy-and-paste of the app-provided CSS code into your blog's template in the "<head>" section.  For example, in Blogger you can paste text there by selecting the Design - Template - Edit HTML menu options.  
  • IMPORTANT: one common issue to be aware of is that using the https (secure http) protocol with blogs that support it (such as Blogger) often won't allow some game replayers to function, as they link in different ways to external sites to run the necessary code, and you can get a warning message about mixing https and http protocol items.  The only solution sometimes is to view the blog via http or https, whichever is supported by the replayer tool.  For example, the first three publishing methods work fine with http, but ChessBase does not; with https, the first and third tools do not function, but Chess.com and ChessBase do work (see below)
  • It's also worth noting that the replayers will likely not work across all browsers, for example the Aquarium 2015 replay board works fine on my tablet, but not on my Android phone in the mobile browser view; the web version works, but is too tiny to see.
1.  ChessOK Aquarium 2015 - this publishing tool is the one in current use on this site and represents a big improvement over the previous Aquarium iteration (Aquarium 2012); the old format can be seen in the above link to the 2013 post.  It's worth noting that there's now an Aquarium 2016 version in release with a few extra program features, but nothing new for publishing is highlighted.  In terms of the game display, the board is standard size and stays put in the brower window while the text and annotations, which are large-size for good readability, scroll up and down (an innovation that appeared in the previous version of the ChessBase replayer).  Documentation of Aquarium's publishing functions is minimal but adequate.  Here's my simple outline of the procedure I use for this blog:
  • Copy your game in PGN format (most database programs have this as a one-button function).
  • Go to the Sandbox tab in Aquarium, clear it, then paste the game.
  • In the menu ribbon, go to Web Export - iBook HTML for Blog, hit OK on the dialog boxes.
  • If it's the first time you're doing this, then you should copy the provided stylesheet links at the top for insertion into your blog's template. Otherwise, just copy only the game code. Paste it into your blog post (using an HTML view of the post).

Browne, Walter - ChessAdmin

Result: 1/2-1/2
Site: Las Vegas
Date: ?
B19: Classical Caro-Kann: 4...Bf5 main line
[...] 1.e4 c6 2.d4 d5 3.¤c3 dxe4 4.¤xe4 ¥f5 5.¤g3 ¥g6 6.h4 h6 7.¤f3 ¤f6 This sub-variation is relatively rare in practice, with Nd7 being played most often. I evaluate it as just as sound and less famiiliar for most White players, making it good for Black. 8.¤e5 ¥h7 9.¥c4 e6 10.£e2 ¤d5 This last sequence is essentially forced after Ne5, which is White's all-out attacking attempt. 11.¥b3 ¤d7 12.¥d2 £c7
My personal opening book is 12...a5 13.a4 ¤xe5 14.dxe5 £b6 15.O-O-O O-O-O as the a5/a4 moves give the Nd5 an outpost on b4 if needed. In general, the idea is to exchange the e5 knight and castle queenside, with the queen deployed to either b6 or occasionally c7, depending on white's play. In the actual game, this is the point where I did not remember the book continuation, although I did remember the idea behind it.
13.O-O ¤xe5 14.dxe5 O-O-O 15.h5 ¥c5 16.¦ad1 ¦d7 17.¦fe1 ¦hd8 18.¥c1 £b6 This illustrates why the normal move earlier is Qb6 rather than Qc7, that would have saved a tempo on the position. 19.c3 ¤e7 20.¦xd7 ¦xd7 21.¥c4 ¤d5 This rook exchange sequence gains Black the d-file and reduces the number of heavy pieces available for White to attack with. 22.£f3 £d8 Both Fritz and Houdini at this point prefer Qc7, which in words means the queen pressures e5 and also helps cover the 7th rank on defense. While doubling up on the d-file looks good, the points of potential rook invasion are at this point well covered by White. 23.¤e4 ¥xe4 24.£xe4 ¥e7 Not the best. Houdini recommends f5 first, which would prevent a future queen invasion on h7. 25.g3 Prevents any funny business from Black on h4 25...¥c5 26.¢g2 ¤e7 It would be better to anticipate the queenside pawn advance with Bb6 27.b4 ¥b6 28.a4 ¦d1 29.a5 Qe2 is necessary to prevent the tactical shot on f2, which however... 29...¦xe1
I also miss. 29...¥xf2!?30.¢xf2 ¦xc1 31.¦xc1 £d2+ employs a queen fork and highlights the value of the queen on the open file.
30.£xe1²30...¥c7 31.£e4 This allows the black queen to penetrate, thereby fully offsetting white's space advantage and two bishops. 31...£d1 32.¥e3 £xh5 33.f4 ¤d5 Houdini says a6 would have been slightly better, although I thought getting the knight into play was more important at the time. 34.¥xa7 ¤xc3
Here both Fritz and Houdini originally thought that 34...£g4 was better, as the queen stays active near white's king with the possibility of advancing the h-pawn to attack. However, Houdini eventually came around to my way of thinking. Both moves are essentially equal.
35.£d3
35.£h7!?± was Fritz's evaluation, although I wasn't afraid of it at the time, believing my piece activity would compensate. Houdini agrees with me.
35...¤d5 36.b5 £g4 Fritz agrees taking the pawn too early is bad.
Not 36...¥xa5 37.bxc6 bxc6 38.¥xd5 exd5 39.£a6+ ¢d7 40.£xa5 £e2+ 41.¥f2 £e4+ 42.¢h2+⁠−
37.¥xd5 exd5 38.bxc6 ¥xa5??
Unfortunately I didn't remember this and admittedly was a bit flustered by White's apparent attack. Better is 38...£e6 39.cxb7+ ¢xb7 40.¥d4²40...¥xa5
39.cxb7+??
Both Browne and I missed 39.£xd5 and White wins 39...£e2+ 40.¥f2+⁠−
39...¢xb7±40.¥e3 £d7 At this point we have reached a dead-even endgame where neither side can hope to make progress with good play. 41.£d4 ¢c8 42.£c5+ £c7 43.£xd5 ¥b4 (This allows white too much space. Better was 43...£b7 44.£xb7+ ¢xb7) 44.f5 After this move, either Qc2 or Qb7 allows Black to comfortably hold. Something like Kh2 could have been tried to keep the queens on and white's space advantage.
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2. Chess.com's Game Editor is an online tool that is relatively simple to use - link to instructions - but you need to ensure that you are using the old version of the site for publishing if you don't have a Chess.com blog, as the new version won't show all of the necessary functions in the GUI.  It has a clean look and good aesthetics, but it still doesn't display the evaluation symbols (+/-).

    
3. Knight Vision PGN Publisher - this was what I used as my first publishing tool.  It is easily accessible online, had all of the features I wanted and was simple to use and customize, if not the most aesthetically pleasing.  It uses Shockwave Flash (which may be an issue) and was last updated in 2013, but is still working.



4.  ChessBase

The biggest change in online game publishing is the recent (early July 2016) unveiling of a completely redone ChessBase replayer.  The previous version was well done aesthetically, in my opinion, but lacked a "flip the board" feature and was not blog-friendly.  The new version has a completely new display method, one that includes a large separate scroll window in the webpage that also allows you to maximize it for a near full-screen experience.  Major other new features are intended to emulate working in a ChessBase software environment, including an ability to drag-and-drop pieces on the board to create your own variations, toggle engine (Fritz) analysis on, annotation tools, and the ability to save or download the game in PGN.  Feature descriptions and instructions can be found at the above link and look easy - just copy the style sheet info into your blog template and then paste PGN data in between an embed code.

[EDIT] After a number of tries, it appears that the ChessBase viewer will not function with an http view of the blog and only works with https.  (There's also a typo in the style sheet code in the linked instructions, if you just paste it in it will cause an error message in Blogger due to a missing "/" or "</link>" at the end of the first HTML code line).  You can see the https blog post view in this link, which correctly displays the ChessBase viewer.


[Event "Simul"] [Site "Las Vegas"] [Date "????.??.??"] [Round "?"] [White "Browne, Walter"] [Black "ChessAdmin"] [Result "1/2-1/2"] [ECO "B19"] [Annotator "ChessAdmin/Fritz/Houdini"] [PlyCount "87"] [EventDate "2006.??.??"] {B19: Classical Caro-Kann: 4...Bf5 main line} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nf6 {This sub-variation is relatively rare in practice, with Nd7 being played most often. I evaluate it as just as sound and less famiiliar for most White players, making it good for Black.} 8. Ne5 Bh7 9. Bc4 e6 10. Qe2 Nd5 {This last sequence is essentially forced after Ne5, which is White's all-out attacking attempt.} 11. Bb3 Nd7 12. Bd2 Qc7 $146 ({ My personal opening book is} 12... a5 13. a4 Nxe5 14. dxe5 Qb6 15. O-O-O O-O-O {as the a5/a4 moves give the Nd5 an outpost on b4 if needed. In general, the idea is to exchange the e5 knight and castle queenside, with the queen deployed to either b6 or occasionally c7, depending on white's play. In the actual game, this is the point where I did not remember the book continuation, although I did remember the idea behind it.}) 13. O-O Nxe5 14. dxe5 O-O-O 15. h5 Bc5 16. Rad1 Rd7 17. Rfe1 Rhd8 18. Bc1 Qb6 {This illustrates why the normal move earlier is Qb6 rather than Qc7, that would have saved a tempo on the position.} 19. c3 Ne7 20. Rxd7 Rxd7 21. Bc4 Nd5 {This rook exchange sequence gains Black the d-file and reduces the number of heavy pieces available for White to attack with.} 22. Qf3 Qd8 {Both Fritz and Houdini at this point prefer Qc7, which in words means the queen pressures e5 and also helps cover the 7th rank on defense. While doubling up on the d-file looks good, the points of potential rook invasion are at this point well covered by White.} 23. Ne4 Bxe4 24. Qxe4 Be7 {Not the best. Houdini recommends f5 first, which would prevent a future queen invasion on h7.} 25. g3 {Prevents any funny business from Black on h4} Bc5 26. Kg2 Ne7 {It would be better to anticipate the queenside pawn advance with Bb6} 27. b4 Bb6 28. a4 Rd1 29. a5 {Qe2 is necessary to prevent the tactical shot on f2, which however...} Rxe1 ({I also miss.} 29... Bxf2 $5 30. Kxf2 Rxc1 31. Rxc1 Qd2+ {employs a queen fork and highlights the value of the queen on the open file.}) 30. Qxe1 $14 Bc7 31. Qe4 {This allows the black queen to penetrate, thereby fully offsetting white's space advantage and two bishops.} Qd1 $11 32. Be3 Qxh5 33. f4 Nd5 {Houdini says a6 would have been slightly better, although I thought getting the knight into play was more important at the time.} 34. Bxa7 Nxc3 ({Here both Fritz and Houdini originally thought that} 34... Qg4 {was better, as the queen stays active near white's king with the possibility of advancing the h-pawn to attack. However, Houdini eventually came around to my way of thinking. Both moves are essentially equal.}) 35. Qd3 (35. Qh7 $142 $5 $16 {was Fritz's evaluation, although I wasn't afraid of it at the time, believing my piece activity would compensate. Houdini agrees with me.}) 35... Nd5 $11 36. b5 Qg4 { Fritz agrees taking the pawn too early is bad.} ({Not} 36... Bxa5 37. bxc6 bxc6 38. Bxd5 exd5 39. Qa6+ Kd7 40. Qxa5 Qe2+ 41. Bf2 Qe4+ 42. Kh2 $18) 37. Bxd5 exd5 38. bxc6 Bxa5 $4 ({Unfortunately I didn't remember this and admittedly was a bit flustered by White's apparent attack. Better is} 38... Qe6 39. cxb7+ Kxb7 40. Bd4 $14 Bxa5) 39. cxb7+ $4 ({Both Browne and I missed} 39. Qxd5 $142 { and White wins} Qe2+ 40. Bf2 $18) 39... Kxb7 $16 40. Be3 Qd7 $11 {At this point we have reached a dead-even endgame where neither side can hope to make progress with good play.} 41. Qd4 Kc8 42. Qc5+ Qc7 43. Qxd5 Bb4 ({This allows white too much space. Better was} 43... Qb7 44. Qxb7+ Kxb7) 44. f5 {After this move, either Qc2 or Qb7 allows Black to comfortably hold. Something like Kh2 could have been tried to keep the queens on and white's space advantage.} 1/2-1/2

10 July 2016

Commentary: 2016 U.S. Championship, Round 1 (Nakamura - Lenderman)

I'm back to analyzing a select series of commentary games from the April 2016 U.S. Championships.  From major events I try to pull games of particular interest, either due to their openings or particular features that appear, for commentary work.  I find that this complements analyzing your own games well, since it provides a much cleaner framework (typically GM-class games) for showing typical plans and how they can be executed.

Reviewing top-level games also reminds us how nobody is perfect and we can all get into problem situations, as GM Lenderman does in the below first-round game against GM Hikaru Nakamura, the eventual champion.  I selected the game (highlighted in this ChessBase news article) because it shows a gambit and fianchetto approach against the Semi-Slav, which is my own preferred method of combating it.  In terms of thematic material, the game very much highlights the classic ideas behind exploiting a lead in development, including grabbing space and opening lines for your pieces.  Some key tactical themes also include the problem with hanging pieces, various pins, and defending pieces (in this case, a couple of key pawns for White) tactically while advancing your plan.

Nakamura, Hikaru (2787) - Lenderman, Alexsandr (2618)

Site: Saint Louis USA
Date: 2016.04.14
[...] 1.d4 d5 2.c4 e6 3.¤f3 ¤f6 4.¤c3 c6 the Semi-Slav 5.g3 here White goes with a kingside fianchetto approach, typical of a Catalan-style opening. I also prefer to play this way vs. a Semi-Slav style setup, although I'm not a 1. d4 player. This is also in effect a gambit approach, since Black can opt (as in the game) to take and try and hold the c-pawn. 5...dxc4
5...¤bd7 is most often played here and often signals a desire to keep the central structure and play for the e5-e4 break eventually.
6.¥g2 b5 7.O-O ¥b7 8.b3 this is the only game in the database with this move; Nakamura is often not afraid to be experimental in the opening. Most often played is Ne5, focused on targeting the c6 pawn, but White scores below par (45 percent).
Here's one game with a similar approach, although Nakamura accelerates the idea by a tempo. 8.¤e5 £b6 9.b3 cxb3 10.£xb3 ¥e7 11.¦d1 O-O 12.e4 a5 13.¥e3 a4 14.£c2 £a5 15.a3 ¤a6 16.¤d3 ¦ac8 17.¦db1 ¥a8 18.¥d2 £d8 19.e5 ¤d5 20.¤e4 ¤b6 21.¤dc5 ¤xc5 22.dxc5 ¤d7 23.¥f4 g5 24.¥e3 ¤xe5 25.¦d1 £c7 26.¤xg5 ¤g6 27.h4 ¦fd8 28.h5 ¤f8 29.£c3 ¦xd1+ 30.¦xd1 ¦d8 31.¦e1 e5 32.f4 ¥f6 33.¤e4 ¥g7 34.f5 £e7 35.h6 ¥h8 36.¥g5 f6 37.¥e3 £f7 38.¤d6 £a7 39.£c2 1-0 (39) Hovhannisyan,M (2515)-Hautot,S (2360) Charleroi 2015
8...cxb3 here I wonder if this move wasn't in part driven by psychological factors, as a relatively safe-looking approach.
8...b4 looks the most testing, as Komodo assesses. 9.¤a4 c3 10.a3 a5 11.¤e5 ¤bd7 and Black looks fine, with the c6 pawn tactially protected, for example: 12.¤xc6?12...£c7 13.¤e5 ¥xg2 14.¢xg2 ¤xe5 15.dxe5 £xe5µ
9.£xb3 now the game has transposed back to the database, with a very small but very favorable record for White (75 percent). 9...¥e7 10.¤e5 a6 11.¦d1 O-O 12.¤e4 an effective move for the piece. The knight on c3 is not contributing materially to White's game, so Nakamura prepares to transfer it. Bg5 has been previously played here, with success, but Nakamura prefers to leave that square open for the Ne4 to move to. 12...£c7 (12...¤bd7!? would directly challenge the Ne5.) 13.¤g5 showing the value of targeting the traditionally weak f7 pawn, even when it is still protected by the Rf8, when the square e6 is also under attack. This is also a typical tactical theme in the Caro-Kann, where Black has to watch for sacrifices involving attacks on f7/e6. 13...a5 (13...h6?!14.¤gxf7 ¦xf7 15.£xe6 and Black has problems.) 14.¥h3 we are still far from the point where forced variations will get White anything. Nakamura bides his time and is content to engage in a maneuvering battle. Here e6 is targeted yet again, ignoring the (overprotected) c6 pawn. 14...a4 15.£c2 at this point the engine shows a slight plus for White. Black cannot have been too happy with the opening, as evident after the next move, which brings all the queenside pieces back to their original squares. 15...¥c8 a logical and correct move to protect e6, but it still must have been annoying to have to do. Black has little dynamic play available and his approach must be to hold onto the extra pawn and hope White's initiative proves fruitless. Normally Black would also try to look for a way to give back the material to fully equalize, for example in the move 17 variation below. 16.¥f4 £d8 the queen has to move off the b8-h2 diagonal because of the threat of discovered attack. 17.¤g4 containing the obvious threat of exchanging the Nf6 and playing Qxh7 mate. 17...g6 this weakens the king position and helps make Black's edge more concrete.
17...¤bd7!?18.¥e5 h6 19.¤xf6+ ¤xf6 20.¥xf6 hxg5 21.¥xe7 £xe7 22.£xc6 ¥d7 and the engine shows equality, but the position looks much easier for White to play.
18.¤xf6+ ¥xf6 19.¤e4 ¥g7
19...¥e7!? helping cover d6 may have been better, in light of White's 21st move, although it's understandable wanting to fill the kingside holes.
20.¥g2± the long diagonal becomes more important to occupy again, now that the sac threat against e6 is over. The engine's significant plus for White is easy to visualize here, given White's advantage in development (five pieces to one) and space. 20...£b6 21.¥d6 a good example of how to exploit better developed pieces and seize yet more space. 21...¦e8 22.¦ac1 £d8 moving back to the original square. Black has to be frustrated by this point. 23.¥c5 ¥a6 24.¥b4 £c7 playing defensively around the c6-pawn. But now Nakamura illustrates the principle of the benefits of opening the position when ahead in development, as well as highlighting the tactical danger of placing pieces (the Qc7) onto undefended squares. (24...¥b7) 25.d5!+⁠− this pawn lever effectively breaks open the position for White's pieces in the center. 25...exd5 26.¤d6 the point being a double attack (with the knight on the Re8 and the Bg2 on the d5 pawn; the c6 pawn is pinned against the Qc7 and no longer protects d5). 26...£d7 hoping that giving back material (i.e. the Re8) will exhaust White's initiative.
26...¦f8 27.¥xd5 £e7 moving out of the pin still leaves White with a big advantage and Black with little he can do about it, for example 28.¥g2 £e5 29.¦d2 ¥c8 30.¥c5 ¥d7 31.¤xb5 ¦c8 32.¤d6+⁠−
27.¤xe8 £xe8 there is now less material on the board and the balance is roughly even, but White still has the far-better developed pieces, so continues to find success by opening lines in the center. 28.e4 d4 29.e5 and the pawn is tactically protected, as either the bishop or queen taking on e5 would be followed up by Re1, losing Black material. 29...h5 this gives Black an escape square on h7, but there's little else he can do at this point. 30.f4 the pawn on d4 is now doomed and trying to keep the material balance doesn't help Black. 30...f6 31.¦xd4 fxe5 32.fxe5 ¥c8
32...¥xe5? the pawn is still tactically protected 33.¦e4+⁠−
33.¦cd1 a simple yet powerful follow-up. 33...¥d7 Black blocks the penetration of a rook on d8, but now White has too many other threats, including on g6. 34.¦d6 £xe5 35.£xg6 £f5 36.¥c3 a beautiful move which puts maximum pressure on Black. Now the Bg7 is doomed.
36.¦f1 would be a less incisive but still practical way of winning. 36...£xg6 37.¦xg6+⁠−
36...£f7 37.¦f1 £xg6 38.¦xg6 and after the bishop goes, White will have a mate in 5.
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26 June 2016

Annotated Game #160: Focus and accurate calculation

In this last-round tournament game, I was able to elevate my level of play significantly when compared to the earlier games, which I attribute to a better level of focus on my part.  Correct application of opening principles (countering in the center on move 4, for example) led to me having a comfortable position as Black in a Slav Defense. After a minor misstep on move 12, I was able to recover and accurately see the best continuation, including the most effective in-between move (14...Nxe3). Most importantly, I was able to concretely parry the temporary initiative that my opponent generated, then find the tactical refutation to his too-aggressive play. I was pleased to be able to continue the accurate play afterwards and correctly ignored his kingside attack while setting up my own fatal blow.

While it's always important to look for improvements in your wins (for example on move 12) as well as your losses, I think that for improving players it's also important to take some pleasure in good play (it's always great to see the engine agreeing with your choices over multiple sequences).  Even more important, though, is seeking to remember and emulate the factors that led to that good play, for use in future games.

Class A - ChessAdmin

Result: 0-1
D10: Slav Defence: cxd5 (without early Nf3) and 3 Nc3
[...] 1.d4 d5 2.c4 c6 3.¤c3 dxc4 4.a4 immediately preventing Black from playing...b5 to reinforce the c4 pawn. 4...e5 countering in the center like this is a dynamic way for Black to play, taking advantage of the fact that White is temporarily a pawn down, so having the e5 pawn taken would not even be a gambit. 5.e3 exd4 capturing is indicated here, otherwise the e-pawn is too difficult to defend for Black. 6.exd4 ¥e6 the natural developing move that also keeps the c4 pawn. 7.¤f3 ¥e7 I played this to continue to control g5, which would not have been the case after ...Nf6.
7...¤f6 would be fine, though. 8.¥g5 (8.¤g5 ¥d5µ) 8...¤bd7 followed by ...h6 gives Black a plus.
8.¥e3
8.¤e5 ¤f6 9.¥xc4 ¥xc4 10.¤xc4 ¤a6 11.O-O O-O 12.¥f4 ¤b4 13.£d2 ¤fd5 14.¦ad1 ¦c8 15.¥e5 ¦e8 16.¦fe1 ¥f8 17.¤e4 ¦e6 18.f4 b5 19.f5 ¦h6 20.¤e3 ¤xe3 21.¦xe3 ¤d5 22.¦f3 f6 Kazansev,A (2275)-Ovsjuchenko,S (2199) Krasnodar 2002 0-1 (44)
8...¤f6 (8...¤d7!? would help combat White's next idea more effectively.) 9.¤e5 working to recover the pawn on c4. 9...¤bd7 10.¤xc4 here Komodo gives a slight edge to Black. The knight is somewhat misplaced on c4 and Black has a small development advantage (4 pieces to 3).
10.¥xc4 ¥xc4 11.¤xc4 now compared with the game continuation, both White and Black have equal development (three pieces).
10...O-O
10...¤b6?!11.¤e5 (11.¤xb6 £xb6 just helps Black's development) 11...¥d6 12.¥d3 ¤bd5³
11.¥d3 ¤d5 12.O-O ¥g5 not a terrible move, but not addressing the needs of the position. It is more important to utilize the knights effectively and the bishop is fine where it is. The text move would be great for Black if White captured on g5, but that's not going to happen. (12...¤b4!?) (12...¤7f6) (12...¤7b6) 13.£h5 an effective way to equalize for White. 13...h6 this is now forced, due to the double threat against the Bg5 and h7. 14.f4?! this is overly aggressive.
14.¤xd5!? must definitely be considered, comments the engine via the Fritz interface. 14...¥xd5
14...¤xe3³ a beneficial in-between move for Black, who does not have to react directly to the threat against the Bg5. 15.¤xe3 Black now has the pair of bishops.
15.fxg5?15...¤xf1 16.gxh6?16...g6 17.¥xg6 ¥xc4−⁠+ and White does not have enough pieces in the attack to do anything to Black's king.
15...¥f6³16.¤c2 a somewhat passive follow-up to the overly-aggressive f4 push.
16.d5 would be more in the spirit of the previous aggression. 16...¤b6 (16...cxd5 17.f5 ¥xc3 18.bxc3 ¤f6 19.£f3 ¥d7³) 17.dxe6 £xd3³ with a more complicated picture and opportunities for White.
16...¤b6µ increasing pressure on d4 from the Qd8. 17.¤e2 (17.¢h1 ¤c4µ) 17...¥c4 the correct square (c4) to focus on, but the bishop is not the most effective piece.
17...¤c4!? now Black has a series of threats to the b-pawn that White has a very hard time dealing with. 18.b3 (18.¥xc4 ¥xc4 19.¦fd1 ¦e8 20.¤c3 £b6−⁠+) 18...¤d2 19.¦fd1 ¤xb3−⁠+
18.£f5 g6 the obvious response, which is rather awkward for White. 19.£h3 ¥xd3 this prematurely releases the tension.
19...¦e8 this indirectly protects the h-pawn, by attacking the Ne2 and not allowing White to exchange on c4 without subsequently taking care of his knight. 20.¥xc4 (20.¦fe1 ¥h4µ) 20...¤xc4 21.£c3 £d5µ
20.£xd3³20...¦e8 I still have a small positional advantage, including being able to target the isolated d-pawn, but White has fewer problems to worry about now. 21.¤g3 c5 the idea - which the engine agrees with - is to take advantage of the pin on the d-pawn against the hanging Qd3, but White's next move is the best response and one that I did not anticipate. 22.a5 ¤d7 23.f5 g5 24.¤e4 White is enjoying some initiative here and I definitely felt pressured during the game. However, I am able to focus and calculate properly. 24...cxd4 25.¤d6?? my opponent gets too aggressive and fails to see the tactical response, which wins for Black.
25.¤xf6+!?25...¤xf6 26.£xd4 £xd4+ 27.¤xd4 ¦ad8µ here Black's rook activity provides an endgame edge.
25...¤c5−⁠+ simultaneously attacking the Qd3 and Nd6. 26.£h3? desperation, although White has no good alternatives. (26.£g3 ¥e5 27.¤xf7 ¢xf7−⁠+ and Black is a full piece ahead.) 26...£xd6 27.£xh6 d3 the quickest way to victory. 28.¢h1 dxc2 29.h4 ¦e2 30.hxg5 due to his own vulnerable king, White simply doesn't have time to do enough with his kingside attack, which I can effectively ignore. 30...£g3
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