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10-22-2012 , 09:24 AM
#51
KellyRae
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Quote:
Originally Posted by KellyRae
Spoiler:
1. a7 Ba6+ 2. b7 Ne4 3. g8=N+ Ke8 4. Nf6+. And then 4 ... Nexf6 threatens mate in 2. White needs to use underpromotion/stalemate to avoid this -- he must play 5 a8=B. Seems like a number of possibilities after that to consider but White can draw from here.
Edit for clarity.
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10-22-2012 , 10:57 AM
#52
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nice work Kelly

But i must say that i didn't like the study that much. Of course having underpromotions to N and B in one study is nice, but since this is accomplished it pales a bit

It bothered me that it was more difficult to find the threats than the defenses.

YKW: You promised more studies, i loved the 2/day diet...moar_fat_child.jpg
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10-23-2012 , 09:15 AM
#53
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You didn't finish the solution
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10-23-2012 , 09:28 AM
#54
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back to 2/day diet




and



both white to move, both setup from white's perspective.

Should be ez for Noir
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10-23-2012 , 09:41 AM
#55
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1st: wat you doing on a8 horsey
Spoiler:
1.Nb6 Kxb6 2.Kh8 Bc4 3.g8Q Bxg8 4.Bg1
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10-23-2012 , 09:53 AM
#56
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2nd:
Spoiler:
1.Kc5 f5 and Rf6 is a problem, looks like we can just brutally stop it with 1.Bf5
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10-23-2012 , 07:17 PM
#57
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Quote:
Originally Posted by RoundTower
You didn't finish the solution
What would black's next move(s) be? Seems he has to take the stalemate.

Not seeing a way to make progress w/o obvious slip up by White.
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10-24-2012 , 01:52 AM
#58
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Quote:
Originally Posted by KellyRae
What would black's next move(s) be? Seems he has to take the stalemate.

Not seeing a way to make progress w/o obvious slip up by White.
5...ne5
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10-24-2012 , 03:42 AM
#59
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2nd problem:

Spoiler:
It's easy once you see that the only defense to 1. Kc5-d6 is f5! with the idea of Rf6+. So 1. Bf5! and mate or rook loss is unstoppable. gxf5 2. Kc5 f6 3. Kd6 Rg8 4. Ke6 Kf8 5. Kxf6 and wins.
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10-24-2012 , 03:49 AM
#60
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1st problem:

Spoiler:
First we have to establish that we're aiming for a draw here because black threatens to stop our pawn with Bc4 and queen his one. So we stop this threat with:
1. Nb6! Kxb6 2. Kh8 Bc4 3. g8=Q Bxg8 4. Bg1! fxg1=Q/R stalemate. Promoting to a knight or bishop is possible but then we take his bishop, leading to a draw.
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10-24-2012 , 11:08 AM
#61
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Quote:
Originally Posted by RoundTower
5...ne5
Some thoughts, maybe others see something I'm missing ...

5 ... Ne5 6 Kb8 Nc6+ 7 Kc8 Nb4 8 Kb8 Nd7+

and now White needs to play 9 Ka7 (else, 9 Kc8 Nb6+ 10 Kb8 Nc6#), but not seeing how Black can now generate mating threats after 9 Ka7 -- and it seems that it is Black, not White, that is now fighting to draw. Maybe a better spot than b4 for the Knight?

I guess if Black had an extra move somehow, following 9 Ka7, he could play 9 ... Bc4 and 10 ... Nc6#, but I'm not seeing how he gets there without allowing one of the White pawns to promote with check.
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10-24-2012 , 07:12 PM
#62
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Quote:
Originally Posted by KellyRae
Some thoughts, maybe others see something I'm missing ...

5 ... Ne5 6 Kb8 Nc6+ 7 Kc8 Nb4 8 Kb8 Nd7+

and now White needs to play 9 Ka7 (else, 9 Kc8 Nb6+ 10 Kb8 Nc6#), but not seeing how Black can now generate mating threats after 9 Ka7 -- and it seems that it is Black, not White, that is now fighting to draw. Maybe a better spot than b4 for the Knight?

I guess if Black had an extra move somehow, following 9 Ka7, he could play 9 ... Bc4 and 10 ... Nc6#, but I'm not seeing how he gets there without allowing one of the White pawns to promote with check.
last hint:
Spoiler:
7... bf1
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10-24-2012 , 07:19 PM
#63
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Ok maybe this instead:

Spoiler:

5 ... Ne5. 6 Kb8 Nc6+ 7 Kc8 Bc4

And now White must underpromote again. Promoting to Queen or Bishop allows 8 ... Ba6+ followed by 9 ... Ne4 and 10 ... Nd6#. 8 b8(N) is met by 8 ... Ne7+ 9 Kb7 Bd5+ 10 Ka7 Nc8+ picking up the Bishop on a8 while halting the c7 pawn.

So, we have

8 b8(R) Ba6+ 9 Rb7

And now 9 ... Ne4, which would otherwise threaten 10 ... Nd6# leads to a draw again by stalemate.


That's all I have for now.

Guessing the Étude is not done yet, though.
Last edited by KellyRae; 10-24-2012 at 07:21 PM. Reason: Just saw hint -- I is slow typer
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10-25-2012 , 01:15 PM
#64
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Quote:
Originally Posted by KellyRae
Ok maybe this instead:

Spoiler:

5 ... Ne5. 6 Kb8 Nc6+ 7 Kc8 Bc4

And now White must underpromote again. Promoting to Queen or Bishop allows 8 ... Ba6+ followed by 9 ... Ne4 and 10 ... Nd6#. 8 b8(N) is met by 8 ... Ne7+ 9 Kb7 Bd5+ 10 Ka7 Nc8+ picking up the Bishop on a8 while halting the c7 pawn.

So, we have

8 b8(R) Ba6+ 9 Rb7

And now 9 ... Ne4, which would otherwise threaten 10 ... Nd6# leads to a draw again by stalemate.


That's all I have for now.

Guessing the Étude is not done yet, though.
Spoiler:
that's it. No queen promotion sadly
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10-31-2012 , 02:29 AM
#65
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Quote:
Originally Posted by ganstaman
What do you propose black plays next?
got it
Spoiler:
4...Nc2 5. Nc6#
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10-31-2012 , 02:46 AM
#66
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KellyRae: good job solving that monster puzzle
YKW: moar
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11-04-2012 , 08:25 PM
#67
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easy one to warm up in the morning

white to move.

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11-05-2012 , 04:59 AM
#68
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Spoiler:
1. Bh4 d3 2. Bxf2 d2 3. Be1 d1=R 4. Ke2 Rc1 5. Ba5 and the last pawn falls.
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11-10-2012 , 01:19 AM
#69
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Quote:
Originally Posted by KellyRae
Spoiler:
1. a7 Ba6+ 2. b7 Ne4 3. g8=N+ Ke8 4. Nf6+. And then 4 ... Nexf6 threatens mate in 2 White needs to use underpromotion/stalemate to avoid. He must play 5 a8(B) Seems like a number of possibilities after that to consider.
you mean 4. a8=B, right?
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01-09-2013 , 05:59 PM
#70
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bump:
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01-09-2013 , 07:43 PM
#71
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Spoiler:
1. a4+ Kxa4 2. Nb6+, 1. ... Kc6 2. Ne5+.
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01-09-2013 , 11:32 PM
#72
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Quote:
Originally Posted by coon74
Spoiler:
1. a4+ Kxa4 2. Nb6+, 1. ... Kc6 2. Ne5+.
Spoiler:
winning an exchange is not enough, the resulting endgame is not winning.

1. a4+ Ka4 2. Ndc5+ Rxc5 (if 2.. Kb5 then 3. Ba6+ wins a full rook with a winning endgame) 3. Bd7+ Nc6 (if R/Nb5 then Nc5 mate, if Rc6 then just Nxd4) up until here it was not so hard to see, but it took me a while to see the final idea 4. Nc5+! Kb5 5. Na4!! b3+ (if Kxa4 then 6. Bc6 mate!) 6. Kxb3

Very very beautiful geometry after Na4. Nice etude wlrs
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01-10-2013 , 09:17 AM
#73
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Quote:
Originally Posted by YouKnowWho
Spoiler:
winning an exchange is not enough, the resulting endgame is not winning.

1. a4+ Ka4 2. Ndc5+ Rxc5 (if 2.. Kb5 then 3. Ba6+ wins a full rook with a winning endgame) 3. Bd7+ Nc6 (if R/Nb5 then Nc5 mate, if Rc6 then just Nxd4) up until here it was not so hard to see, but it took me a while to see the final idea 4. Nc5+! Kb5 5. Na4!! b3+ (if Kxa4 then 6. Bc6 mate!) 6. Kxb3

Very very beautiful geometry after Na4. Nice etude wlrs
Spoiler:
Amazing solution, that's a really cool puzzle. Thanks for the solution, YKW.
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01-10-2013 , 09:56 AM
#74
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Spoiler:
Yeah, that's amazing! Thx, wrls! Of course I couldn't believe that White's objective was to win until YKW showed it.
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01-23-2013 , 05:44 AM
#75
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another one from tactics trainer:
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