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Old 2014-10-08, 16:48   #1
LaurV
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Default Move 49

Time to make a new topic.
Because 49 is 7 squared :P

Their move was expected. We can now either go for exchange with Rb6 or Rc6, both still very good for us, or go for the a5 pawn with Ra7+, saving the bishop on the way too.

From the "go for exchange", Rb6 Nxb3 Rxb3 seems terrible for black, as they cant defend both pawns anymore, after they lose the horse, with our king in e2 or d3. Therefore they will go to avoid the exchange, something along the line Rb6 Bd2 (Bg5 is bad due to Rb5, Ba3 is worse) Ke2, they have to chose which pawn to defend: Bb4 Bc2 [or even Rxb4? after axb4, a5, they can't beat the bishop because then they can't reach the pawn anymore - that pawn is queen. If they wait, like Kd7 or so, our king is clear to their pawn, after Bc4, and we play three pawns and bishop against one pawn (h6) and horse] Ne6 Kd3, etc.

Even better for us seems to be the Rc6, after Nxb3 Rc3 Nd4+ Ke4, we centralized the king faster than in the above version, we still get back a piece (this is long reach, see here:) Bb2 Rc7+ Kd6 Rb7 Ba1 Rb1 Bc3 (or Nc2) Kd3 (or Rc1) we get the figure back, and they still can't defend both pawns.

But the best for us still seems to be Ra7+, which I analyzed deeply last weekend. As I said, here we go for their pawn, more directly: Kd6 Bc2 Bd2 Ke2. Here again, they have to choose which pawn they defend. A5 is directly threatened, but if Bb4 (or Bc3) then Rh7 and we are as good as a queen on that side, with two free pawns and full artillery of rook and white bishop toward h7/8 and g7/8. So, it is either Bc1 or Bg5, and then poof! Rxa5, pawn is gone. In fact, look to this beautiful board after Ke2, it does not give to black any chance :razz:

So, my vote is for Ra7+.

Any reason I missed, which would justify why we should consider the other two moves?

I am going to sleep now, midnight here, trying to dream how I can find 2.5 millions mersenne factors till tomorrow, to close Batalov's mouth... (:razz: buddy, I know you are reading the thread, hehe).
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Old 2014-10-09, 21:08   #2
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I agree Ra7+ is better.
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Old 2014-10-17, 13:40   #3
LaurV
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Ok, their Kf6 does not change the bishops' plans: [B]Bc2[/B], then if Bd2, Ke2, and see how they succeed to defend both pawns on both sides.
What do you think?
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Old 2014-10-17, 15:09   #4
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See it pretty much the same as you do.
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Old 2014-10-20, 22:58   #5
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Kg4 Black cant get the King or Knight to that side allowing us to swap the Rook for the Bishp and Pawn ending up with 2 passed pawns.
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Old 2014-10-22, 15:06   #6
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You have an affinity to push that king out of the center of the table. We can't get both bishop and pawn for the rook, and we don't have enough time to bring the pawns there, before black swaps his horse for our a4 and bishop, and we transform in the same time, or they transform faster.

For example: Kg4 Ke5. Now if we bring the pawns, we end up only exchanging the pawns. If Kh5 Kd4 Rh7 Kc3 Bd1 (if we want to keep it) Kb4. Now we exchange the rock for the horse only (and the bishops and a pawn each are collateral damages). We transform the pawns in the same time.

The best for us is to keep their king from coming toward the center and toward our a4 pawn. Take their king's opposition, scare their bishop off first. We then may get one of the pawns for free, because they can not defend both sides in the same time with their already overloaded bishop.

So, unless you find a better line for white in this situation, my move is still [B]Ke2[/B], as already discussed. This move force them to move the bishop, and they either put it on c1, g5, b4 or c3, in first case we have a pawn for free, in the second the same, but also it helps us to move h4, and in the last cases if they leave the diagonal for b4 or c3, we have Rh7 and get the other pawn for free. Why should we want to exchange the rook for it? Even if it would come packaged with a bishop... (but is not really..).

Last fiddled with by LaurV on 2014-10-22 at 15:08
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Old 2014-10-22, 17:16   #7
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I have this game on setup on 2 different locations and they don't have identical notes about the position.
One reflects first thing in the morning and the other evening thinking.
Here are some notes see how they compare with yours

51. Ke2

[51. Kg4 Ne6 [51... Ke5 52. Kh5
Kd4 53. Rh7 Kc3 54. Bd1 Kb4 55. Rxh6 Bxh6 56. Kxh6 Nxa4 57. g4 Nc5 58. g5 Nb3
59. g6 a4 60. g7 a3 61. g8Q] 52. Ra6 Ke7 [52... Ke5 53. Kh5 Nd4 54. Bd1 Ke4 55.
Rxh6 Bxh6 56. Kxh6 Nf3 57. h3 [57. Bxf3+ Kxf3 58. Kh5 Ke4 59. g4 Kd4 60. g5 Kc4
61. g6 Kb4 62. g7 Kxa4 63. g8Q Ka3 64. Qc4] 57... Ng1 58. h4] 53. Kh5 Ng7+ 54.
Kg6 Ne8 55. Bf5]

51... Bb4

[51... Bc3 52. Rc7 [52. Rh7 Kg5 53. h4+ [53. Kf3 Ne6
54. h4+ Kh5 55. Bd1 Kg6 56. Ra7 Bb4 57. Ke4 Ng7 58. Ra6+ Kh7] 53... Kg4 54. Rxh6
Kxg3] 52... Bb4 53. Kf3 Kg5 54. Rg7+ Kf6 55. Rg6+]

52. Rh7

[52. Kf3 Kg5 [52... Bd2
53. Kg4 Ne6 54. Ra6 Ke5 55. Kh5 Nd4 56. Bd1 Nf5 57. g4 Ng7+ 58. Kg6] 53. Rg7+
Kf6 54. Rg6+]

52... Kg5 53. Kf3 Ne6 54. Rd7

[54. h4+ Kh5 55. Rd7 Bc3 56. Rd5+]


54... Bc3 55. h4+ Kh5

[55... Kf6 56. Kg4 Nf8 57. Rc7 Bb4]

56. Bb3 *
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Old 2014-10-26, 15:38   #8
LaurV
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I went through your tree of moves today a little bit. It is getting quite complex. You went through a lot of trouble to write all that down..
Should I understand from your post that you agree on 51. Ke2, or that you insist on [51. Kg4, or else?

I still prefer Ke2, but if you insist on [Kg4, we can play it. It is not as bad as I was thinking, actually we win in any case, we have too much advantage.

We only have tomorrow, so if you are around, give me a sign.
Otherwise I will play Ke2 tomorrow evening (my time, UTC+8), considering that you placed Ke2 on the main branch and Kg4 on a secondary branch, so it seems you agree with Ke2 too :razz: (that is why I kept the parenthesis when I copy-pasted the moves from your post, hehe)

Last fiddled with by LaurV on 2014-10-26 at 15:41
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Old 2014-10-26, 19:27   #9
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If you feel morecomfortable with Ke2 than that is ok since some of the lines transpose into Kg4.
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Old 2014-10-27, 11:04   #10
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Yes, I like Ke2, beside of hushing that bishop away, keeping the big guy in the center is advantageous for us, we can reach any side faster, keep king's opposition and they can't guard both pawns, and will lose a pawn for free.

So, I played Ke2.
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Old 2014-11-01, 11:50   #11
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Ok, on your variant, the move should be now Rc7.

[QUOTE][51... Bc3 52. Rc7 [52. Rh7 Kg5 53. h4+ [53. Kf3 Ne6[/QUOTE]Why do we have to run for their pieces? We started to take the pawns, let's take them.

[B]52 Rh7[/B], directly.

They can't defend the pawn, if Kg5, then Rf7 and they are cornered in for a mate there, or lose the horse after Rf5+. They also can't move Kg5 _after_ we take the pawn, because of Rg6+ and the king is cornered to h5 for a mate.

So, the only reasonable is that they move something else (Bb4, Bd4, Ke5?) and we get the pawn for free.

Last fiddled with by LaurV on 2014-11-01 at 11:50
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