Answers.Body: <blockquote>
    <p>won that game, but I feel like I got lucky. I blundered in this game. I feel that letting white capture my rook on a8 was a blunder</p>
  </blockquote>
  
  <p>Everything you said was correct. </p>
  
  <blockquote>
    <p>Also what if white captured g4 then I have to capture e4 with my knight. White then captures my rook at a8. I don't see any compensation for black for the lost of material. </p>
  </blockquote>
  
  <p>Again, I agree with your conclusion.</p>
  
  <blockquote>
    <p>I also don't see how to continue the attack through this variation.</p>
  </blockquote>
  
  <p>You can't, because White plays <code>Rc7</code> and keeps everything under control. Even if you "get" classical <code>...Bh3</code> sacrifice he will have <code>Rxc7+</code> in that setup and your attack is dead. Bishops and knight will easily repel your minor pieces, not to mention that extra rook...
  Since it was long time since I played actively KID ( both as Black and White ), I had to check theory as well. You missed the <strong>key move</strong> <code>19...Nd7!</code> which stops White queenside action in its tracks, in my opinion. This is also the move theory recommends.     </p>
  
  <blockquote>
    <p>What could I have done better as black against my opponent?</p>
  </blockquote>
  
  <p>I think your first mistake, and very serious one, was <code>19...Bd7?!</code>. I would simply follow theory and respond with <code>19...Nd7!</code>, stopping White's shenanigans at queenside. His attack is severely slowed down, while you can continue the attack with <code>...h5</code>. This is the only important moment you can use in this game to improve.</p>
  
  <p>Aside from that, you made some serious blunders he could have exploited. After he took the rook the game was over, but you managed to "come back". In many occasions you gave him a chance for turnover, which is a result of poor combinational skill. You need to practice more, especially when you play this opening, and especially when you play this line. Tactics is everything for Black here! See the comments in the game below to see all the mistakes and suggested improvements.</p>
  
  <pre><code>[Title "Game analysis"]
  [fen ""]
  
  1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.Be3 f5 11.f3 f4 12.Bf2 g5 13.b4 Nf6 14.c5 Ng6 15.cxd6 cxd6 16.Rc1 Rf7 17.Nb5?! ( 17.a4!? ) 17...a6 18.Nc3 Bf8 19.Na4 Bd7?! ( 19...Nd7!? ) 20.Nb6 g4? ( 20...Rb8!?+/= ) 21.Nxa8+- g3? ( 21...Qxa8 22.Rc7+- ) 22.hxg3 ( 22.Nc7!? gxf2+ 23.Rxf2) 22...fxg3 23.Bxg3 Nh5 24.Bf2 ( 24.Bh2!? Bh6 25.f4 Nhxf4 26.Bxf4+- ) 24...Ngf4 25.Nb6 Rg7 26.Nxd7?? ( 26.g4!+- Nh3+ 27.Kh1 Nxf2+ 28.Rxf2 Qxb6 29.Rh2 ) 26...Qxd7?? ( 26...Rxg2+! $8 27.Nxg2 Qg5-+ ) 27.Kh2?? ( 27.g4!+- ) 27...Nxg2?? ( 27...Rxg2!+ $8 28.Nxg2 Qh3+ 29.Kg1 Qxg2# ) 28.Nxg2?? ( 28.Rc7!! Qc7 29.Nxg2+- ) 28...Rxg2+ 29.Kxg2 Nf4+ 30.Kg1 Qh3 0-1
  </code></pre>
  
  <blockquote>
    <p>What are some key ideas in the King's Indian Defense that I missed in this game?</p>
  </blockquote>
  
  <p>You missed nothing, push <code>...f5</code> -> deliver checkmate or die. The concept is easy to grasp :)</p>
  
  <p><em>The only time you sidestep this pattern is in Yugoslav attack, but that is a different story ( White there goes for fianchetto with <code>g3 + Bg2</code> ). In that case you prepare exchange sacrifice with <code>...Rxb2!</code>, but this is off-topic here. If you need further questions about this line post them as a new question.</em></p>
  
  <blockquote>
    <p>What concepts should I grasp from this game I played to become a better chess player and better using the King's Indian Defense?</p>
  </blockquote>
  
  <p>You can't play this line unprepared, you <strong>must</strong> know theory of this line very well. </p>
  
  <p>This line is so forced that one wrong move will cost you the game. Already after <code>19...Bd7?!</code> White stood better! You had no counterplay after that, and if you played <code>...Rb8</code> he could simply take your light-squared bishop and destroy <strong>every</strong> mean of counterplay you have ( <strong>the point of this line is to sacrifice that bishop for <code>h3</code> pawn</strong> ). Without your key attacker, your attack would be dead, while he would first bolster his kingside, and then demolish you on the queenside, since you would have no natural kingside counterplay.</p>
  
  <p>Second thing, your tactical skill must be very high, because this line relies solely on that. There are no "hidden gems" it is raw and simple -> mate or die. You missed several times clean win which gave him the chance <strong>to win the game</strong>. I hope you will understand just how devastating blunders, or even imprecise moves, can be in this line, so please sharpen your tactical skill.</p>
  
  <p>Third, play "clean chess". After <code>27.Kh2??</code> you had "clean victory" with <code>27...Rxg2+! 28.Nxg2 Qh3+ 29.Kg1 Qxg2#</code> yet you decided to complicate with <code>27...Nxg2??</code> after which he could have <strong>won</strong> the game with <code>28.Rc7!!</code>. Always aim <strong>to destroy opponent's counterplay</strong>, especially in these positions. If you have a queen and pawn versus rook, give the queen for the rook and win simple pawn endgame. In this opening, and in this mainline, there is always venom in position and "playing with fire" can backfire, in view of you stalemating the opponent or not seeing some cheap tactics. <strong>If you have a forced win, then by all means, win by force!</strong></p>
  
  <blockquote>
    <p>When is it the right time to give up the rook on a8 for an attack on the king side?</p>
  </blockquote>
  
  <p>Only if you are certain that your attack is so strong that it will at least get you perpetual check or will win you back the material. Other than that, forget it!</p>
  
  <h2>SUMMARY:</h2>
  
  <p>Well played, keep sharpening your tactical skill and learn theory to the <strong>last</strong> book move. Always aim to win the easiest way because this line is minefield and you never know when you will allow your opponent to play some crazy intermediate move that will give him magnificent comeback ( or maybe you will blunder a cheap tactical shot ).</p>
  
  <p>If you have further questions leave a comment. Best regards.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2014-09-19T17:01:57.250Z
Answers.LastActivityDate: 2019-07-01T20:48:27.590Z
Answers.LastEditDate: 2019-07-01T20:48:27.590Z
Answers.UserDisplayName: AlwaysLearningNewStuff
Answers.Body: <p>Actually, I don't think a6 was a good move. In those structures, I would be very careful to push the a-pawn too early. At some point it might be necessary of course, but this was too early in my opinion. </p>
  
  <p>Instead you could consider 17... g4, because a common motif in these structures is that 18. fxg4 is bad due to 18... Nxe4 with grabbing away the dark squared bishop. </p>
  
  <p>After 17... g4 18. Nxa7 Bd7 one important point to notice is, that 19. Bb5 fails due to 19...g3! ( 20. hxg3 fxg3 21. Be3 fails to the standard 21... Nxd5 with Qh4 to follow up, while 22. Bxd7 fails due to 22...Nxe3).
  So after 18. Nxa7, Whites play is simply too slow, and blacks attack is way to strong - therefore there is no need to defend a7 at all. </p>
  
  <p>On every other whites move then 18. Nxa7, you can simply play 18... g3 with the follow-up g3 hxg3 fxg3 Bxg3 Nh5 Bh2/f2 Ngf4 and a strong attack. </p>
  
  <p>Therefore Nb5 might actually be already quite a blunder. </p>
  
  <p>There is one thing you should always check before playing a6: That's the Na4-b6 idea. 
  To avoid this, you should play a6 mainly, if Na4-b6 is either too slow to prevent the king side attack, or if a6 Na3/c3 b5 is possible with avoiding the nasty knight jumps.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-01T13:22:51.783Z
Answers.LastActivityDate: 2019-07-01T13:22:51.783Z
Answers.UserDisplayName: Chris
Body: <pre><code>[fen ""]
  
  1. d4 Nf6
  2. c4 g6
  3. Nc3 Bg7
  4. e4 d6
  5. Nf3 O-O
  6. Be2 e5
  7. O-O Nc6
  8. d5 Ne7
  9. Ne1 Nd7
  10. Be3 f5
  11. f3 f4
  12. Bf2 g5
  13. b4 Nf6
  14. c5 Ng6
  15. cxd6 cxd6
  16. Rc1 Rf7
  17. Nb5 a6
  18. Nc3 Bf8 
  19. Na4 Bd7
  20. Nb6 g4
  21. Nxa8 g3
  22. hxg3 fxg3
  23. Bxg3 Nh5
  24. Bf2 Ngf4
  25. Nb6 Rg7
  26. Nxd7 Qxd7
  27. Kh2 Nxg2
  28. Nxg2 Rxg2+
  29. Kxg2 Nf4+
  30. Kg1 Qh3 0-1
  </code></pre>
  
  <p>I won that game, but I feel like I got lucky. I blundered in this game. I feel that letting white capture my rook on a8 was a blunder. Also what if white captured g4 then I have to capture e4 with my knight. White then captures my rook at a8. I don't see any compensation for black for the lost of material. I also don't see how to continue the attack through this variation. What could I have done better as black against my opponent? What are some key ideas in the King's Indian Defense that I missed in this game? What concepts should I grasp from this game I played to become a better chess player and better using the King's Indian Defense? When is it the right time to give up the rook on a8 for an attack on the king side? </p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-09-08T05:59:13.110Z
Comments.Text: Wow... nice game.
Comments.UserDisplayName: Patrick Coulombe
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-09-08T10:09:49.263Z
Comments.Text: Quick comment: 27...Rxg2+ 28.Nxg2 Qh3+ is a cleaner win, so 27.Kh2 was probably a blunder. What's your level? You play an awesome amount of theory for a player that misses mate in three with checks.
Comments.UserDisplayName: RemcoGerlich
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-09-08T15:01:47.453Z
Comments.Text: Yes, `27.Kh2` was probably a blunder, so take on `g2` one move earlier. `26...Rxg2+ 27.Nxg2 Qg5` and White has to give up most of their material to avoid checkmate.
Comments.UserDisplayName: Dag Oskar Madsen
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-09-15T04:00:19.267Z
Comments.Text: Up to around move 19 it's all still theory, good job to the both of you. I think that 19...h5 is better than Bf8 but I'll have to check. I also remember seeing an analysis of 9...Nd7 vs Ne8 with one of them refuting White's possible attack on the kingside, but I can't remember it right now (maybe you remember it).
Comments.UserDisplayName: user1803551
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-09-20T14:35:12.113Z
Comments.Text: I'd admire your willingness to take chances. Your opponent may have blundered, but you set up a situation that, unlike you, he was unable to navigate. A fine win.
Comments.UserDisplayName: Tony Ennis
Tags: <opening><analysis><kings-indian>
Title: What are some stronger moves I can play next time in the King's Indian Defense?
ThreadText: # What are some stronger moves I can play next time in the King's Indian Defense?
  
  (Asked by: username_0 on 2014-09-08)
  
  [fen ""]
  
  1. d4 Nf6
  2. c4 g6
  3. Nc3 Bg7
  4. e4 d6
  5. Nf3 O-O
  6. Be2 e5
  7. O-O Nc6
  8. d5 Ne7
  9. Ne1 Nd7
  10. Be3 f5
  11. f3 f4
  12. Bf2 g5
  13. b4 Nf6
  14. c5 Ng6
  15. cxd6 cxd6
  16. Rc1 Rf7
  17. Nb5 a6
  18. Nc3 Bf8 
  19. Na4 Bd7
  20. Nb6 g4
  21. Nxa8 g3
  22. hxg3 fxg3
  23. Bxg3 Nh5
  24. Bf2 Ngf4
  25. Nb6 Rg7
  26. Nxd7 Qxd7
  27. Kh2 Nxg2
  28. Nxg2 Rxg2+
  29. Kxg2 Nf4+
  30. Kg1 Qh3 0-1
  
  I won that game, but I feel like I got lucky. I blundered in this game. I feel that letting white capture my rook on a8 was a blunder. Also what if white captured g4 then I have to capture e4 with my knight. White then captures my rook at a8. I don't see any compensation for black for the lost of material. I also don't see how to continue the attack through this variation. What could I have done better as black against my opponent? What are some key ideas in the King's Indian Defense that I missed in this game? What concepts should I grasp from this game I played to become a better chess player and better using the King's Indian Defense? When is it the right time to give up the rook on a8 for an attack on the king side?
  
  **Tags:** opening, analysis, kings-indian
  
  > **Comments:**
  > **username_1**: Wow... nice game.  
  > **username_2**: Quick comment: 27...Rxg2+ 28.Nxg2 Qh3+ is a cleaner win, so 27.Kh2 was probably a blunder. What's your level? You play an awesome amount of theory for a player that misses mate in three with checks.  
  > **username_3**: Yes, `27.Kh2` was probably a blunder, so take on `g2` one move earlier. `26...Rxg2+ 27.Nxg2 Qg5` and White has to give up most of their material to avoid checkmate.  
  > **username_4**: Up to around move 19 it's all still theory, good job to the both of you. I think that 19...h5 is better than Bf8 but I'll have to check. I also remember seeing an analysis of 9...Nd7 vs Ne8 with one of them refuting White's possible attack on the kingside, but I can't remember it right now (maybe you remember it).  
  > **username_5**: I'd admire your willingness to take chances. Your opponent may have blundered, but you set up a situation that, unlike you, he was unable to navigate. A fine win.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_6 on 2014-09-19. Score: 5
  
  won that game, but I feel like I got lucky. I blundered in this game. I feel that letting white capture my rook on a8 was a blunder
  
  Everything you said was correct. 
  
  Also what if white captured g4 then I have to capture e4 with my knight. White then captures my rook at a8. I don't see any compensation for black for the lost of material. 
  
  Again, I agree with your conclusion.
  
  I also don't see how to continue the attack through this variation.
  
  You can't, because White plays Rc7 and keeps everything under control. Even if you "get" classical ...Bh3 sacrifice he will have Rxc7+ in that setup and your attack is dead. Bishops and knight will easily repel your minor pieces, not to mention that extra rook...
  Since it was long time since I played actively KID ( both as Black and White ), I had to check theory as well. You missed the key move 19...Nd7! which stops White queenside action in its tracks, in my opinion. This is also the move theory recommends.     
  
  What could I have done better as black against my opponent?
  
  I think your first mistake, and very serious one, was 19...Bd7?!. I would simply follow theory and respond with 19...Nd7!, stopping White's shenanigans at queenside. His attack is severely slowed down, while you can continue the attack with ...h5. This is the only important moment you can use in this game to improve.
  Aside from that, you made some serious blunders he could have exploited. After he took the rook the game was over, but you managed to "come back". In many occasions you gave him a chance for turnover, which is a result of poor combinational skill. You need to practice more, especially when you play this opening, and especially when you play this line. Tactics is everything for Black here! See the comments in the game below to see all the mistakes and suggested improvements.
  [Title "Game analysis"]
  [fen ""]
  
  1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.Be3 f5 11.f3 f4 12.Bf2 g5 13.b4 Nf6 14.c5 Ng6 15.cxd6 cxd6 16.Rc1 Rf7 17.Nb5?! ( 17.a4!? ) 17...a6 18.Nc3 Bf8 19.Na4 Bd7?! ( 19...Nd7!? ) 20.Nb6 g4? ( 20...Rb8!?+/= ) 21.Nxa8+- g3? ( 21...Qxa8 22.Rc7+- ) 22.hxg3 ( 22.Nc7!? gxf2+ 23.Rxf2) 22...fxg3 23.Bxg3 Nh5 24.Bf2 ( 24.Bh2!? Bh6 25.f4 Nhxf4 26.Bxf4+- ) 24...Ngf4 25.Nb6 Rg7 26.Nxd7?? ( 26.g4!+- Nh3+ 27.Kh1 Nxf2+ 28.Rxf2 Qxb6 29.Rh2 ) 26...Qxd7?? ( 26...Rxg2+! $8 27.Nxg2 Qg5-+ ) 27.Kh2?? ( 27.g4!+- ) 27...Nxg2?? ( 27...Rxg2!+ $8 28.Nxg2 Qh3+ 29.Kg1 Qxg2# ) 28.Nxg2?? ( 28.Rc7!! Qc7 29.Nxg2+- ) 28...Rxg2+ 29.Kxg2 Nf4+ 30.Kg1 Qh3 0-1
  
  
  What are some key ideas in the King's Indian Defense that I missed in this game?
  
  You missed nothing, push ...f5 -> deliver checkmate or die. The concept is easy to grasp :)
  The only time you sidestep this pattern is in Yugoslav attack, but that is a different story ( White there goes for fianchetto with g3 + Bg2 ). In that case you prepare exchange sacrifice with ...Rxb2!, but this is off-topic here. If you need further questions about this line post them as a new question.
  
  What concepts should I grasp from this game I played to become a better chess player and better using the King's Indian Defense?
  
  You can't play this line unprepared, you must know theory of this line very well. 
  This line is so forced that one wrong move will cost you the game. Already after 19...Bd7?! White stood better! You had no counterplay after that, and if you played ...Rb8 he could simply take your light-squared bishop and destroy every mean of counterplay you have ( the point of this line is to sacrifice that bishop for h3 pawn ). Without your key attacker, your attack would be dead, while he would first bolster his kingside, and then demolish you on the queenside, since you would have no natural kingside counterplay.
  Second thing, your tactical skill must be very high, because this line relies solely on that. There are no "hidden gems" it is raw and simple -> mate or die. You missed several times clean win which gave him the chance to win the game. I hope you will understand just how devastating blunders, or even imprecise moves, can be in this line, so please sharpen your tactical skill.
  Third, play "clean chess". After 27.Kh2?? you had "clean victory" with 27...Rxg2+! 28.Nxg2 Qh3+ 29.Kg1 Qxg2# yet you decided to complicate with 27...Nxg2?? after which he could have won the game with 28.Rc7!!. Always aim to destroy opponent's counterplay, especially in these positions. If you have a queen and pawn versus rook, give the queen for the rook and win simple pawn endgame. In this opening, and in this mainline, there is always venom in position and "playing with fire" can backfire, in view of you stalemating the opponent or not seeing some cheap tactics. If you have a forced win, then by all means, win by force!
  
  When is it the right time to give up the rook on a8 for an attack on the king side?
  
  Only if you are certain that your attack is so strong that it will at least get you perpetual check or will win you back the material. Other than that, forget it!
  SUMMARY:
  Well played, keep sharpening your tactical skill and learn theory to the last book move. Always aim to win the easiest way because this line is minefield and you never know when you will allow your opponent to play some crazy intermediate move that will give him magnificent comeback ( or maybe you will blunder a cheap tactical shot ).
  If you have further questions leave a comment. Best regards.
  
  
  ---
  
  ### Answer by username_7 on 2019-07-01. Score: 1
  
  Actually, I don't think a6 was a good move. In those structures, I would be very careful to push the a-pawn too early. At some point it might be necessary of course, but this was too early in my opinion.
  
  Instead you could consider 17... g4, because a common motif in these structures is that 18. fxg4 is bad due to 18... Nxe4 with grabbing away the dark squared bishop.
  
  After 17... g4 18. Nxa7 Bd7 one important point to notice is, that 19. Bb5 fails due to 19...g3! ( 20. hxg3 fxg3 21. Be3 fails to the standard 21... Nxd5 with Qh4 to follow up, while 22. Bxd7 fails due to 22...Nxe3).
  So after 18. Nxa7, Whites play is simply too slow, and blacks attack is way to strong - therefore there is no need to defend a7 at all.
  
  On every other whites move then 18. Nxa7, you can simply play 18... g3 with the follow-up g3 hxg3 fxg3 Bxg3 Nh5 Bh2/f2 Ngf4 and a strong attack.
  
  Therefore Nb5 might actually be already quite a blunder.
  
  There is one thing you should always check before playing a6: That's the Na4-b6 idea.
  To avoid this, you should play a6 mainly, if Na4-b6 is either too slow to prevent the king side attack, or if a6 Na3/c3 b5 is possible with avoiding the nasty knight jumps.
  
  
  ---
  
  