Jha Sriram vs Rajaram R Laxman (2009)

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Jha Sriram vs Rajaram R Laxman
Indian Premier National A Championship (2009), Mumbai IND, rd 9, Dec-10
Bogo-Indian Defense: Vitolinsh Variation (E11) · 1-0

ANALYSIS [x]

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Dec-18-09		notyetagm: This game has one of the most instructive tactical sequences I have ever seen. Figure out why Black resigns after 18 e5x♘f6!. Why does the obvious <DESPERADO> 18 ... ♕e7x♖a3 fail? Hint: <FORCING MOVES>.

Dec-18-09		MaxxLange: after 18...Qxa3, White wins a TEMPO with 19 Qxf3! this POWERFUL MOVE threatens the crude 20 Bxh7+, winning the Black Queen on a3, and also works as a DOUBLE ATTACK, threatening the BATTERY 20 Qe4, where 20...g6 will be met by switching to attack on the dark squares nice puzzle

Dec-19-09		MaxxLange: 18...Qxa3?? 19 Qxf3! Qe5 20 Qh5! 1-0 19...g6 20 Qf4!

Dec-19-09		MaxxLange: oooh what about the line 18...Qxa3 19 Qxf3 Qe5 20 Qh5 h6 21 g4 looks strong

Dec-19-09		kurtrichards: <18. ... Qxa3 19. Qxf3 Qe5>? 19. ... Qe5 for black is not legally possible. Do you mean 19. ... Qa5? Or am I missing something?

Dec-19-09		wordfunph: <kurt> you didn't miss something... we miss you in BW ahehe! visit ka naman Sir..

Dec-19-09		kurtrichards: Pasyal ako sa forum mo. Okay lang ba?

Dec-19-09		wordfunph: <kurtrichards: Pasyal ako sa forum mo. Okay lang ba?> sir, you are most welcome sa forum. Galing mo sa bookie tindi! See you then..

Dec-25-09		notyetagm: <notyetagm: This game has one of the most instructive tactical sequences I have ever seen. Figure out why Black resigns after 18 e5xNf6!. Why does the obvious <DESPERADO> 18 ... Qe7xRa3 fail? Hint: <FORCING MOVES>.> (VAR) 18 ... ♕e7x♖a3 click for larger view 19 ♕e2x♗f3?! click for larger view 18 ... ♕e7x♖a3 19 ♕e2x♗f3 was not the solution I was looking for. <RYBKA 3> gives 19 ... ♕a3-a5! ▢ as equal. 19 ... ♕a3-a5! ▢ click for larger view Analysis by Rybka 3 32-bit: 1. = (0.00): 19...Qa3-a5 20.d4-d5 g7xf6 21.Qf3-g4+ Kg8-h8 22.Qg4-h4 f6-f5[] 23.Qh4-f6+ Kh8-g8 24.d5xe6 f7xe6 25.Qf6xe6+ Kg8-h8 26.b2-b4 Qa5xb4 27.Qe6-e5+ Kh8-g8 28.Bd3xf5 Rf8xf5 29.Qe5xf5 Ra8-e8 30.Qf5-d5+ Kg8-g7 31.Qd5-g5+ Kg7-h8[] 2. (5.08): 19...Qa3xd3 20.Qf3xd3[] So, again, why does the APPARENT <DESPERADO> 18 ... ♕e7x♖a3 fail? HINT: I used the terms "APPARENT <DESPERADO>" for a reason.

Dec-26-09		MaxxLange: sorry....not sure what I was thinking. ....Qe5? odd

Dec-26-09		Gilmoy: I solved a different branch. After <17..Bxf3 18.exf6!> Black has <two en prise>, while White is momentarily absolved by <mutual threat> to both Qs. This invites a capture-chain, but it will end with <20.exf8=Q+>, winning a tempo for White, and a piece. Hence, Black must diverge first. The general solution to <two en prise> is to retreat one so it defends the other, which means <18..Qb7>. A special case is to extend the <mutual threat>; this is <notyetagm's DESPERADO 18..Qxh3?!> Both of these fail to the same idea: <White can check out>, with a withering K-side attack: 18..Qb7 19.Bxh7+ <of course -- think of it as the two-Bishop sac with a holiday Bishopback Bonus> Kh8 <Kxh7 20.Rxf3> 20.fxg7+ Kxg7 21.Qe5+ f6 22.Qg3+ Kxh7 <no point delaying it any longer> 23.Rxf3 up a clear pawn, with two-Rook mate threats, e.g. 24.Qg4. Black can't defend with <23..Rg8?? 24.Qh4+> overwhelming f6, nor <23..Qg7 24.Qh3+ Qh6 25.Qxe6> with pinning threats. The same sequence defeats the <mutual threat> desperado: White eventually checks out, and Black drops Q+P for R+N: 18..Qxa3?! 19.Bxh7+ Kxh7 <Kh8 see above> 20.Qc2+ and 21.bxa3.

Apr-01-11		notyetagm: Game Collection: SIWT!: SAVE IT WITH TEMPO!

Jun-17-11		notyetagm: Game Collection: FORCING MOVES SHOW YOU WHERE PIECES REALLY ARE --- D Howell vs A Bitalzadeh, 2009 15 .. f7-f5? 16 Qg4-g3! queen really on g3 attacking undef c7-Q J Sriram vs R R Laxman, 2009 19 Bd3xh7+!, 20 f6xg7+ mean White e2-queen not really en prise! Aronian vs Anand, 2011 39 Qb4-b2+!, 40 Bf3-e2 means g2-pawn need not protect f3-bishop

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