Normal Topic Pterodactyl variation (Read 6827 times)
AmateurDragoneer
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Re: Pterodactyl variation
Reply #5 - 01/09/04 at 18:20:34
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Bad news guys, g6 is not playable!

3...cxd4 4.Qxd4! Nf6 5.Nc3! Nc6 5.Qa4 d6 6.e5! GM Wells (games) ±
3...Bg7 4.dxc5! Qa5 5.c3 Qxc5 6.Be3! Qc7 7.Na3! Nf6 8.Nb5 Qa5 9.Bf4! d6 10.e5 dxe5 11.b4! ± WGM Radziewicz (analysis)


Perhaps instead you meant 3...cxd4 4. Qxd4! Nf6 5. Nc3!? Nc6 5. Qa4 d6 6. e5!? dxe5 which is unclear, but probably equal. Wells has only managed a draw against this defense and Black should be quite satisfied with that, especially when you consider that only a rather highly rated player is likely to play this line. Certainly an U2000 is unlikely to have this from home preparation, let alone choose it OTB.
  
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Ben_Hague
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Re: Pterodactyl variation
Reply #4 - 01/09/04 at 12:56:22
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3...Bg7 4.dxc5! Qa5 5.c3 Qxc5 6.Be3! Qc7 7.Na3! Nf6 8.Nb5 Qa5 9.Bf4! d6 10.e5 dxe5 11.b4! ± WGM Radziewicz (analysis)


There do seem to be alternatives here. Such as on move 7 Black can play Bxc3+ picking up a couple of pawns but white certainly has play, or the most common option on move 7 which seems to be Nc6 and after Nb5 Qb8.

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A.W.
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Re: Pterodactyl variation
Reply #3 - 01/09/04 at 08:32:13
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Bad news guys, g6 is not playable!

3...cxd4 4.Qxd4! Nf6 5.Nc3! Nc6 5.Qa4 d6 6.e5! GM Wells (games) ±
3...Bg7 4.dxc5! Qa5 5.c3 Qxc5 6.Be3! Qc7 7.Na3! Nf6 8.Nb5 Qa5 9.Bf4! d6 10.e5 dxe5 11.b4! ± WGM Radziewicz (analysis)
  
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Dragonangel
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Re: Pterodactyl variation
Reply #2 - 01/09/04 at 08:03:00
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1.e4 c5 2.Nf3 g6!? 3.d4

now i dont like 3...cxd4 because it doesnt limit white's options!
(1) 4.Qxd4 might be +=
(2) 4.Nxd4 + 5.c4 black has to play Maroczy
(3) 4.Nxd4 +5.Nc3 gives the usual Dragon /Acc. Dragon

instead i would like to discuss 3...Bg7!

i think 4.dxc5 Qa5x 5.c3 Qxc5 is the critical position.

Anyone has analyis to 6.Na3 or 6.Be3 ?

At this moment i think white has a clear advantage after 6.Na3 d6 (Bxc3 is very bad i believe)
7.Qa4! is a new move: 7...Bd7 8.Qb3 and now b7 and f7 are weak and if black has to play e7-e6 d6 becomes a target! 

  
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AmateurDragoneer
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Re: Pterodactyl variation
Reply #1 - 12/01/03 at 17:20:33
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This usually serves as a transpositional device to the Dragon or Accelerated Dragon without allowing 3. Bb5 moves (against 2...d6 or Nc6). The real test is 3. d4! Bg7 (3...cxd4 4. Qxd4 supposed to be better for White but the only time I've had this played against me was followed by 4...Nf6 5. e5?! {i think 5. Bb5 is supposed to be better for White} Nc6 and I had no problems) and now I think 4. dxc5 is the only logical way for White to attempt to gain an advantage. However, open sicilian players will be totally unprepared for such a line while black will, presumably, know the theory on this line. Overall, black can end up slightly worse if white is a real theory buff but otherwise I see no reason why people should dislike this variation. Chris Ward must have something in mind after 4. dxc5 (after 3...Bg7) as I have seen at least one game of his (maybe more) that started with this move order and transposed (eventually) to an standard yugoslav attack. After 3...cxd4 4. Qxd4 (4. Nxd4 Nf6 5. Nc3 d6 is a regular dragon or 4...Nc6 with an accelerated dragon)  Nf6 and now White has scored best (around 53 or 54%) with 5. Bb5 and 5. Nc3. However, BLACK scores a whopping 56% after 5. Bb5 a6 6. e5 axb5 7. exf6 Nc6 while 5. Nc3 d6 (6...Qc7 is also good and 6...Bg7 and 6...Ng4 are rather untested) 6. e5 dxe5 7. Nxe5 Bd7 should be fine for Black and Chris Ward has scored 75% from this position with a win against Chandler and a draw to McShane in 2002. So perhaps 3...cxd4 is alright after with 4. Qxd4 being rather ambitious, but perhaps 4. Nxd4 is a safer alternative for the unprepared white player.

I hope that will be sufficient and if not you can simply use chessbase of NewinChess's online databases to do some research. Sorry I didn't analyse one of Wojkiewicz's games, but surely the information above if sufficient.
  
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nexirae
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Pterodactyl variation
12/01/03 at 16:15:57
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What are the main differences between the Dragon/Accelerated as compared to the Pterodactyl (e4 c5 Nf3 g6!?)?  Are there any independent lines white should be aware of?  Or should white just continue along with normal Dragon plans?   

I know that GM Wojtkiewicz employs this variation on a common basis...perhaps someone could analyze one of his games?

Lend a wing,
NeX iRae
  
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