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| Mar-07-18 | | Cheapo by the Dozen: I found this one pretty hard.
There are a lot of lines that almost work on the h-file, but fail to checks on the light-squared long diagonal. Then instead of the game move I tried Bxe7, but Black's queen actually is too mobile to be successfully diverted. After that I finally did see the game move, and did quickly see the d6 interference followup that is necessary and sufficient to win in most lines. But after all that, checking that the passed pawn indeed leads to a clear win is a task in itself. |
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| Mar-07-18 | | gofer: Hmmm, I cannot see a "slam dunk" or anything close.
There are nice waiting moves like <38 Qf5> and <38 Bxe7>
seems like it might work, but I don't think it does;
<38 Bxe7 Qxe7 39 d6 Qd8 etc>. So that just leaves... <38 Be5 ...>
The bishop is immune...
38 ... Bxe5?
39 Qxf7 +-
Black has to give up everything to survive and even then
I don't think its possible.
<38 ... Kg7>
<39 Bxf6+ exf6> <40 d6 ...>
This is far from over, if black keeps the queens on the board.
If black trades queens then its a simple win for white. 40 ... Qxf3+
41 Kxf3 Rb8
42 Ke4 Rd8
43 Kd5 Kg7
44 Kc6 +-
The only way this can be a <Wednesday> is if black plays <38 ... Bxe5?>. ~~~
Okay, so I got it right.
But it still feels a little bit odd for a <Wednesday>... |
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| Mar-07-18 | | Whitehat1963: Complicated for a Wednesday. |
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| Mar-07-18 | | morfishine: My first instinct was <38.Rh1+> followed by <39.Qh3> and Black is helpless but it appears that with precise defense, Black can wiggle away ***** |
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| Mar-07-18 | | Grandma Sturleigh: I missed this one because I didn't see the line 38. Be5 Bxe5 39. Qxf7 Rb1 40. Qf8+ Kh7 41. Qf5+ picking up the rook. |
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| Mar-07-18 | | Grandma Sturleigh: <<Walter Glattke>: 41...Qxf5 42.gxf5 Rb8 43.d7 Rd8 44.Kf3 Kf8 is draw,> 44. Ke4 Ke7 45. Rd5 (threatening Kd4, Kxc4) Rxd7 46. Rxd7+ Kxd7 47. Kd5 wins comfortably. |
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| Mar-07-18 | | malt: 38.Be5 Kg7
(38...B:e5 39.Q:f7 Rb1 40.Qf8+ Kh7 41.Qf5+ and 42.Q:b1)39.Qf5 Qb6
(39...B:e5 40.Q:g5+ Kf8 41.Q:e5 Ke8 42.Rd4 )
40.d6 Qb7+ 41.Kg3
also 39.B:f6+ ef6 40.d6 Qd7 41.a4 |
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| Mar-07-18 | | saturn2: Got Be5.
<morfishine My first instinct was <38.Rh1+> followed by <39.Qh3> and Black is helpless>
f2 is not defended now. |
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Mar-07-18
 | | Richard Taylor: I found the initial 38. Be5 the threat is if say 38. ... Rb6 the pin works for tactics, so then 39. d6 looked winning. But 38. ... Rb5 was another line.
I didn't think of 38. ... Kg7 as a riposte...but when I saw that I thought also that either 38. ... Bxf6+ or 38. ... Qf5 again using the pin theme and threatening 39. Qxg5...so I wasn't sure that 38. ... Bxf6+ won so went for that as did others. Also if after 38. Be5 Bxe5 39. Qxf7 I missed 39. ... Rb1 but then White does a series of checks and picks up the Black rook: 38...Bxe5 39. Qxf7
click for larger view Rb1 40. Qh5+ Kg7 41. Qxg5+ Kh8 42. Qh6+ Kg8 43. Qg6+ Kf8 44. Qxb1 wins. This is quite a difficult puzzle as White has a lot of alternatives in the initial position and Black a lot of annoying defenses. So 38. ... Bxe7 looks like a move but 38. ... Qxe7 39. d6 Qd8 and White runs out of steam.
White also had to keep an eye out for possible counter attacks with a Rxf2+ in some situations... |
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| Mar-07-18 | | saturn2: Sorry. My last reply to morfishine makes no sense.how do I delete it with the smartphone? |
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Mar-07-18
| | Richard Taylor: Also in the position above I wasn't sure at first to do if now 39. ... Rxf2+ and had decided on 40. Qxf2 but just now I see Stockfish wants to play 40. ... Kxf2.... and there are a series of scary checks but White wins. I will leave it to the student to study that very instructive variation... |
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| Mar-07-18 | | jith1207: <Saturn2> you get 15 minutes or so to delete your posts, in smart phones as well. I am not sure if it can be done afterwards, admins might only be able to do so if at all, I guess. |
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| Mar-07-18 | | EIDorado: @ Grandma Surleigh white can't move 44. Ke4 if you look carefully. You got to move Kf3 first, and only after that Ke4. |
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| Mar-07-18 | | morfishine: <saturn2> You can use the 'Blow the Whistle' function too |
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| Mar-07-18 | | saturn2: <morfishine> I just wanted to say your Rh1+ Qh3 does not work because of Qxd5+ |
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| Mar-07-18 | | wtpy: So I saw 38 Be5 but did not consider Kg7 as the primary defense but instead 38.. Rb6 39. Qf5 Kg8 (white was threatening 39 Qg5,) 40 Bf6 Rf6 41Qh5. White has won a pawn and has some advantage but certainly not a win. In this line Olga recommends 39 Rh1+ Kg8 40 Qe4 as a better way to proceed rather than Qf5 and gives white's advantage as plus 2.46, which is better than the Kg7 line black chose. I agree with morfishine, chesshighercat, et al. that this was a very tough puzzle for a Wednesday. |
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| Mar-07-18 | | BOSTER: <al wazir> :<I'd have played 39.Qf5>.This move is only looks attractive, but it gives black the possibility to play 39...Rb6 protecting d6 square, and white can't play d6 because the pin. |
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| Mar-07-18 | | agb2002: The material is identical.
The black bishop prevents Qxf7. This suggests 38.Be5: A) 38... Bxe5 39.Qxf7 Rxf2+ (39... Bg7 40.Rg1+ Bh6 41.Rxh6#) 40.Qxf2 + - [R vs b]. B) 38... Qb6 39.d6
B.1) 39... Bxe5 40.dxe7 Qb5(b8,e6) 41.Rd8+ wins. B.2) 39... Kg7 40.dxe7 wins (40... Qb5 41.Qxf6+ and mate next). C) 38... Kg7 39.Bxf6+ exf6 40.d6
C.1) 40... Qxf3+ 41.Kxf3 Rb8 42.Ke4 looks winning. For example, 42... Kf8 43.Kd5 Rc8 44.d7 Rd8 45.Kc6 Ke7 46.Re1+ Kf8 47.Kc7, etc. C.2) 40... Qd7 41.Qf5
C.2.a) 41... Qxf5 42.gxf5 Rb8 43.Kf3 looks similar to C.1. C.2.b) 41... Rb7 42.Qxd7 Rxd7 43.Kf3 with the same idea. For example, 43... f5 44.gxf5 Kf6 45.Ke4 followed by Kd5. C.3) 40... Qc6+ 41.Qd5 followed by d7 or Qxc4 if Black doesn't trade queens. D) 38... Rb6 39.Rh1+ Kg7(8) 40.Qe4, with the threat 41.Qh7+ Kf8 42.Qh8+ Bxh8 43.Rxh8#, looks very good for White. For example, 40... Bxe5 41.Qxe5 f6 42.Qf5 still with attack (threatens mate in four). |
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Mar-07-18
 | | Jimfromprovidence: <BOSTER> <al wazir> :<I'd have played 39.Qf5>.<This move is only looks attractive, but it gives black the possibility to play 39...Rb6 protecting d6 square, and white can't play d6 because the pin.> I agree, this line gains about 1.5 pawns, but if instead of 39...Rb6 if black bites with 39...Qb6, below, it works great. Trying 40 Qxg5+ after 39...Rb6 also looks good, but only wins a pawn it appears. 
click for larger view |
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Mar-07-18
 | | pittpanther: I looked at this a long time. I figured if 38 Be5, then 38...Bxe5 39. Qxf7 followed by 39...Rxf2 by black and the white win was not that clear. Not clear enough for a Wednesday at least. |
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Mar-07-18
 | | Breunor: I saw 38 Be5 and then Bxe5 Qxf7. But I couldn't find strong progress after black plays Rb6. |
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| Mar-07-18 | | patzer2: Got the first two moves of today's Wednesday (38. ?) puzzle with 38. Be5! Kg7 39. Bxf6+ exf6 ± to +-. However, for my third move I went with 40. Qf5 ± to +- which is not as strong as the game continuation 40. d6! +-. Black's game takes a turn for the worse with 35...Rh8? allowing 36. Rxh8 Kxh8 37. Bxd6 ± to +- (+1.45 @ 23 ply, Stockfish 9). Instead, 35...Rxb2 = (0.00 @ 22 ply, Stockfish 9) appears to hold the position level. |
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| Mar-07-18 | | JohnDMaster: How is this 2 stars, I got it right, but there are so many candidate moves this has to be at least 3 stars. |
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| Mar-07-18 | | newzild: I got the first four moves, but prefered 42. Kg3 instead of 42. Qd5. However, 42. Qd5 is probably stronger because it threatens the c-pawn. |
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| Mar-07-18 | | cormier: 
click for larger viewAnalysis by Houdini 4: d 25 dpa
1. = / + (-0.49): 13...Bxc3 14.bxc3 Qc7 15.Qd4 Rfd8 16.Bh6 e5 17.Qd2 Nc5 18.f4 Qe7 19.f5 Rd7 20.Qe3 f6 21.g5 fxg5 22.Bxg5 Qf7 23.f6 Qxa2 24.Qe2 Qf7 25.h4 Rdd8 26.h5 b6 27.Rf1 gxh5 28.c4 Bb7 29.Bd2 2. = / + (-0.31): 13...Re8 14.Bd4 Bh6 15.a4 a6 16.b3 e5 17.Be3 Bxe3 18.Rxe3 Nc5 19.Qd2 Qf6 20.Rd1 Red8 21.a5 Ne6 22.Ne2 Kg7 23.Rf3 Qe7 24.Re3 Nc5 25.c4 Qh4 26.b4 Ne6 27.Rg3 |
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