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Topic: Lets play a game of Chess - page 26. (Read 160665 times)

sr. member
Activity: 308
Merit: 250
December 17, 2015, 12:05:10 PM
Your move bitcointalk. You have the black pieces

The current position is updated below

Game 2 (letsplayagame vs bitcointalk):
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Re4 g5 16.Qf1 Qh5 17.f3 Bf5 18.a4 b4 19.c4 Nf6 20.Re1 Rfe8 21.Be3 c5 22.Nd2 Rxe3 23.Rxe3 cxd4 24.Ree1 d3 25.c5 Bxc5+ 26.Kh1 Rd8 27.Re5

sr. member
Activity: 336
Merit: 250
December 16, 2015, 07:52:01 PM
Some of you might like the article quoted below. I also posted it in another thread in response to a question.

Question for languagehasmeaning, if he is willing to answer. Or anyone who can offer an insight for me.

I am curious. How many moves ahead can you calculate all the possibilities? And is that even a useful computation in playing the game, or is the useful computation probabilistic? Apologies I am ignorant and I am curious about from someone of your caliber, what you can actually do mentally that enables you to win. I suppose I could learn this from books and I haven't researched it.

I know I already answered this question, but here is an answer from someone whose opinion will hold much more weight. World Champion Magnus Carlsen:
http://edition.cnn.com/2015/12/16/sport/magnus-carlsen-chess-world-number-one/index.html

    #AskMagnus How many moves you see ahead of time and how often? overall and your record..?
    — Daniel Pittaluga (@DaniPittaluga) December 3, 2015

MC: "Most of the time the variations that are most relevant are four or five moves ahead, because for the next four or five moves you can calculate every reasonable possibility.

But if it goes much further the possibilities are too diverse and it's just too time-consuming. And also the probability of mistakes are very high.

But if the position is simple, then I can calculate as many moves as I want."
hero member
Activity: 854
Merit: 1000
December 16, 2015, 03:01:19 PM
1 votes g4 (mammut)
5 votes Rd8 (XMRpromotions, galdur, languagehasmeaning, 8xmr, LucyLovesCrypto)
3 votes Bg6 (boolberry, ING Bank, marcus1986)
2 votes Bd6 (tifozi, funnyman21)
1 vote Bd4 (Rolf Uhlhorn)
sr. member
Activity: 414
Merit: 251
December 16, 2015, 09:56:30 AM
1 votes g4 (mammut)
4 votes Rd8 (XMRpromotions, galdur, languagehasmeaning, 8xmr)
3 votes Bg6 (LucyLovesCrypto, boolberry, ING Bank)
2 votes Bd6 (tifozi, funnyman21)
1 vote Bd4 (Rolf Uhlhorn)

changing my vote to Rd8

1 votes g4 (mammut)
5 votes Rd8 (XMRpromotions, galdur, languagehasmeaning, 8xmr, LucyLovesCrypto)
2 votes Bg6 (boolberry, ING Bank)
2 votes Bd6 (tifozi, funnyman21)
1 vote Bd4 (Rolf Uhlhorn)
member
Activity: 88
Merit: 10
December 15, 2015, 08:57:35 PM
1 votes g4 (mammut)
4 votes Rd8 (XMRpromotions, galdur, languagehasmeaning, 8xmr)
2 vote Bg6 (LucyLovesCrypto, boolberry)
2 votes Bd6 (tifozi, funnyman21)
1 vote Bd4 (Rolf Uhlhorn)
sr. member
Activity: 378
Merit: 250
December 15, 2015, 06:17:42 PM
I took the liberty of postings graphics for some of the longer lines of analysis posted for this move so far. I did make one edit to XMRpromotions line as clearly 28.hxg4 is a typo (28.fxg4)


position after 28.Bxf7+
g4 fails in the current position to 27.Re5 Bd4 28.Bxf7+ Kxf7 29.fxg4 Qxg4 30.Rxf5


position after 28.Bxf7+
I did not see all this at the time but if we had played Rae8 like I suggested instead of Rfe8 then g4 would be very strong for us here (because Rxf7 would be possible for us on move 28 below). White may have played differently if we had, so no regrets.


position after Nf2+
I hope he plays 27.g4:
26...Rd8
27.g4 Bxg4
28.fxg4 Nxg4
29.Qg2 Nf2+
30.Kg1 Ng4+
31.Kh1 Nf2+ leading to a draw by perpetual
If white tries to escape with Kf1 then we will win with Nxh2+


position after 28.Rxc5
26.. g4 27. Re5 gxf3 28. Rxc5 Ng4 29. Nxf3 Nxh2 30. Bxf7+ and black can resign
26.. g4 27. Re5 gxf3 28. Rxc5 Re8 29. Qxf3 Be4 30. Qxe4 Qxc5 31. Qxd3 hopeless as well
sr. member
Activity: 378
Merit: 250
December 15, 2015, 05:55:37 PM
If g4 doesn't work, like most of you are saying, then I would opt for Bd4, going for attack at b2 (Bc3 is optional, also Rc2 in a few moves), not defending f7 and with Qh3 go for exchange of the Queens, and activation of the Rook.

I updated your vote below and added mine. Most of us try to keep the current vote totals updated to save time for letsplayagame when he returns to move.

1 votes g4 (mammut)
3 votes Rd8 (XMRpromotions, galdur, languagehasmeaning)
2 vote Bg6 (LucyLovesCrypto, boolberry)
2 votes Bd6 (tifozi, funnyman21)
1 vote Bd4 (Rolf Uhlhorn)
newbie
Activity: 28
Merit: 0
December 15, 2015, 04:21:11 PM
If g4 doesn't work, like most of you are saying, then I would opt for Bd4, going for attack at b2 (Bc3 is optional, also Rc2 in a few moves), not defending f7 and with Qh3 go for exchange of the Queens, and activation of the Rook.
member
Activity: 109
Merit: 10
December 15, 2015, 03:50:12 PM
Rd8 or Bg6 both seem "safe", but my vote is for Bd6 as a variation.

1 vote Bd6 (tifozi)

I hope folks who voted g4 redo their votes since g4 is just not an option.

Changing my vote now....

2 votes g4 (Rolf Uhlhorn, mammut)
3 votes Rd8 (XMRpromotions, galdur, languagehasmeaning)
1 vote Bg6 (LucyLovesCrypto)
2 votes Bd6 (tifozi, funnyman21)

hero member
Activity: 742
Merit: 501
December 15, 2015, 03:44:57 PM
Rd8 or Bg6 both seem "safe", but my vote is for Bd6 as a variation.

1 vote Bd6 (tifozi)

I hope folks who voted g4 redo their votes since g4 is just not an option.
sr. member
Activity: 336
Merit: 250
December 15, 2015, 03:25:13 PM
I apologise; 30. ...- f2 does not checkmate because white does Qg2, which i didn't see. Sorry, can't blame me for attacking f3 and e4 .... I didn't play for 25 years and I am not used looking at a screen; I am having trouble calculating the moves, sorry.

You are doing just fine. It is a complicated position. Our opponent seemingly is making things more complicated on purpose for example choosing (for example) 18.a4 instead of 18.Re1 and 22.Nd2 instead of 22.d5.
sr. member
Activity: 336
Merit: 250
December 15, 2015, 03:14:13 PM
I apologise; 30. ...- f2 does not checkmate because white does Qg2, which i didn't see. Sorry, can't blame me for attacking f3 and e4 .... I didn't play for 25 years and I am not used looking at a screen; I am having trouble calculating the moves, sorry.

Still 26. .. - g4 gives the best options; 27. Re5 - gxf3 28. Rxc5 - Ng4 (or Re8! threatening Re2) 29. Qg1 - Re8. I think something is there for us with g4. To be honest, Rd8 is to passive, our pawn will not go to d1, our Rook must have an attacking role.


26.. g4 27. Re5 gxf3 28. Rxc5 Ng4 29. Nxf3 Nxh2 30. Bxf7+ and black can resign

26.. g4 27. Re5 gxf3 28. Rxc5 Re8 29. Qxf3 Be4 30. Qxe4 Qxc5 31. Qxd3 hopeless as well



You posted before I could. I stand by my original comment. g4 is a great idea but does not work in the current position.
hero member
Activity: 616
Merit: 500
December 15, 2015, 03:09:22 PM
I apologise; 30. ...- f2 does not checkmate because white does Qg2, which i didn't see. Sorry, can't blame me for attacking f3 and e4 .... I didn't play for 25 years and I am not used looking at a screen; I am having trouble calculating the moves, sorry.

Still 26. .. - g4 gives the best options; 27. Re5 - gxf3 28. Rxc5 - Ng4 (or Re8! threatening Re2) 29. Qg1 - Re8. I think something is there for us with g4. To be honest, Rd8 is to passive, our pawn will not go to d1, our Rook must have an attacking role.


26.. g4 27. Re5 gxf3 28. Rxc5 Ng4 29. Nxf3 Nxh2 30. Bxf7+ and black can resign

26.. g4 27. Re5 gxf3 28. Rxc5 Re8 29. Qxf3 Be4 30. Qxe4 Qxc5 31. Qxd3 hopeless as well

sr. member
Activity: 336
Merit: 250
December 15, 2015, 03:04:02 PM

If you recommend Bg6 to avoid a forced draw why did you still vote Rd8 instead of Bg6? Was it because you think white will accept a draw and you don't want that or because you are trying to beat g4 in the voting?


I would be very surprised if white forced the draw this early. Your second guess is correct. I voted for Rd8 as the most popular alternative to g4 because I think g4 is a very bad move for the tactical reasons I explained.  

I really wished I had seen all these variations a few moves ago so I could have presented concrete reasons to vote for Rae8 instead of Rfe8 other than my "intuition" about which rook we should move.
newbie
Activity: 28
Merit: 0
December 15, 2015, 03:02:27 PM
I apologise; 30. ...- f2 does not checkmate because white does Qg2, which i didn't see. Sorry, can't blame me for attacking f3 and e4 .... I didn't play for 25 years and I am not used looking at a screen; I am having trouble calculating the moves, sorry.

Still 26. .. - g4 gives the best options; 27. Re5 - gxf3 28. Rxc5 - Ng4 (or Re8! threatening Re2) 29. Qg1 - Re8. I think something is there for us with g4. To be honest, Rd8 is to passive, our pawn will not go to d1, our Rook must have an attacking role.
hero member
Activity: 616
Merit: 500
December 15, 2015, 02:58:01 PM
just that we dont have to play Bd4 Smiley

What other move would you make after g4 27.Re5?

Bd4 seems to lose the slowest but black has no good continuation after 26..g4 27.Re5 anyway. It´s tantamount to resignation.
sr. member
Activity: 414
Merit: 251
December 15, 2015, 02:54:24 PM
just that we dont have to play Bd4 Smiley

3 votes g4 (Rolf Uhlhorn, funnyman21, mammut)
3 votes Rd8 (XMRpromotions, galdur, languagehasmeaning)

If you recommend Bg6 to avoid a forced draw why did you still vote Rd8 instead of Bg6? Was it because you think white will accept a draw and you don't want that or because you are trying to beat g4 in the voting?

For anyone that does not want to allow the forced perpetual check line below I recommend voting for Bg6 instead.

3 votes g4 (Rolf Uhlhorn, funnyman21, mammut)
3 votes Rd8 (XMRpromotions, galdur, languagehasmeaning)
1 vote Bg6 (LucyLovesCrypto)
sr. member
Activity: 336
Merit: 250
December 15, 2015, 02:48:15 PM
just that we dont have to play Bd4 Smiley

What other move would you make after g4 27.Re5?
member
Activity: 115
Merit: 10
December 15, 2015, 02:43:43 PM
just that we dont have to play Bd4 Smiley

3 votes g4 (Rolf Uhlhorn, funnyman21, mammut)
3 votes Rd8 (XMRpromotions, galdur, languagehasmeaning)
sr. member
Activity: 336
Merit: 250
December 15, 2015, 02:36:38 PM
Rfe8: 3 votes (XMRpromotions, galdur, Morecoin Freeman)

That Rook would be my play too.

Rfe8: 4 votes (XMRpromotions, galdur, Morecoin Freeman, LucyLovesCrypto)

Rfe8: 4 votes (XMRpromotions, galdur, Morecoin Freeman, LucyLovesCrypto)
Rae8 1 vote (languagehasmeaning)

As others have pointed out it may not matter which rook we move. My intuition tells me the game will be decided in the center or kingside and white will not have time to play Qxa6 in the foreseeable future.

Rfe8: 5 votes (XMRpromotions, galdur, Morecoin Freeman, LucyLovesCrypto, newb4now)
Rae8 1 vote (languagehasmeaning)

I did not see all this at the time but if we had played Rae8 like I suggested instead of Rfe8 then g4 would be very strong for us here (because Rxf7 would be possible for us on move 28 below). White may have played differently if we had, so no regrets.

For anyone that does not want to allow the forced perpetual check line below I recommend voting for Bg6 instead. g4 fails in the current position to 27.Re5 Bd4 28.Bxf7+ Kxf7 29.fxg4 Qxg4 30.Rxf5

I hope he plays 27.g4:

26...Rd8
27.g4 Bxg4
28.hxg4 Nxg4
29.Qg2 Nf2+
30.Kg1 Ng4+
31.Kh1 Nf2+ leading to a draw by perpetual

If white tries to escape with Kf1 then we will win with Nxh2+

2 votes g4 (Rolf Uhlhorn, funnyman21)
2 votes Rd8 (XMRpromotions, galdur)

2 votes g4 (Rolf Uhlhorn, funnyman21)
3 votes Rd8 (XMRpromotions, galdur, languagehasmeaning)
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