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| May-07-15 | | patzer2: Got 35. f4+ Kxf4 36. c6  easy enough for today's Thursday puzzle solution.However, after winning the Black Bishop upon promotion of the c-pawn, I wasn't at all clear as to how to win this ending. One trap to avoid in this ending is getting a lone passed pawn on the edge (e.g. the h-file). For example if White plays 48. Ke4?, instead of <48. Ke5!  >, Black can force a draw after 48...h3! (diagram below) 
click for larger view49. gxh3 (forced as others lose) 49...g3 50. hxg3 fxg3 51. Kf3 g2 52. Kxg2 = (diagram below). 
click for larger viewIn this position it's a draw since the White-squared Bishop cannot force Black's King out of the dark squared h8 corner. As long as Black's King retreats to the safety of h8, a stalemate will be the result of any White attempt to force the promotion of the h-pawn. |
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May-07-15
 | | OhioChessFan: 39...f5 blocking the diagonal with a protected Pawn, freeing up the King, has got to be better for Black.
click for larger view |
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May-07-15
| | OhioChessFan: Played with it some and I think it doesn't matter much. White just plays Ba6/b5/e8 and the g Pawn has to advance anyway. |
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| May-07-15 | | mistreaver: Thursday. White to play. Medium. 35.?
I think i remember this one
35 f4! Kxf4
36 c6
37 c7
38 c8Q
and white has a technical win, although by no means easy. |
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| May-07-15 | | wooden nickel: <whiteshark: Timman analyses this endgame:>
Thanks for the link (http://www.youtube.com/watch?featur...)!
White still could mess up, after Black trading down pawns, leaving White a "wrong" bishop and rook pawn!
click for larger view
after 48... h3 49. gxh3. |
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| May-07-15 | | morfishine: <35.f4+> and Black has to accept 35...Kxf4 allowing the pawn to Queen and win a piece after 36.c6 But to actually win from here despite being up a piece? Very difficult to visualize *****
PM: & after trying Crafty a couple of times, its as hard as it looks! ***** |
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| May-07-15 | | gofer: Black threatens d4 which looks to be a draw. White can force
black to rethink that plan. But still has to be very careful
converting the slender lead to a win...
<35 f4+ ...>
35 ... Kd4/Ke4/Kf5/Kxf4
36 c6 any move
37 c7 any move
38 c8=Q Bxc8
39 Bxc8
35 ... Kf5
36 Kd3 Ke7
37 Kd4 Kd7
38 Bb7
~~~
Yep. Even with the bishop advantage, OTB, this would be easy to muck up... |
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| May-07-15 | | TheaN: Thursday 7 May 2015 <35.?> Of course white promotes and wins the bishop for two pawns with <35.f4+ Kxf4> alternatives aren't better <36.c6> with <37.c7>, <38.c8=Q Bxc8 39.Bxc8>. However, the endgame itself is not a trivial win, but I'd say that's out of the scope of a promotion puzzle. |
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May-07-15
 | | Richard Taylor: White can win the ending but OTB if Black plays well you would be forgiven for even losing the game as W, or at least drawing. But my 'engine', with careful play, seems to find a win. I see <gofer> agrees it would be easy to muck up OTB. Well, if you at least spotted the pawn check (35. f4+ you would have a good chance of winning.) [Pats himself on his back.] |
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May-07-15
 | | Penguincw: Alright, I guessed 35.f4+ Kxf4 36.c6 (any) 37.c7 (any) 38.c8=Q Bxc8 39.Bxc8. |
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| May-07-15 | | SuperPatzer77: <<patzer2>: 48. Ke5! is the only move for a win> It's correct because White has to get the a8-h1 diagonal clear for his bishop. Don't block the bishop path with 48. Ke4??. 48. Ke5! h3, 49. g3! fxg3, 50. hxg3 h2, 51. Bb7 (stopping the black h-pawn) A valuable chess lesson for all of us!!
SuperPatzer77 |
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| May-07-15 | | Bycotron: Winning the endgame after 39.Bxc8 is INSANELY difficult! Playing black, I would feel very confident that I had a draw even against the strongest opposition I've faced (~2000 players). My strategy is simply to get rid of white's g-pawn by any means necessary (eg by pushing h5-h4-h3 and following up with f5-f4 if white plays g3). If white has only high LSB and h-pawn, black will draw even if all of his pawns fall. I look forward to reading the comments and analyzing this ending. |
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| May-07-15 | | schweigzwang: <thegoodanarchist: Well, I got it. How? Thought process> D'oh! I should try that method some time. Good call. |
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| May-07-15 | | BOSTER: Everybody can find f4+, but not too many can win such ending.
<M. Hassan : 49.Bd3 and looks like White can win this. >
This is a mistake. |
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| May-07-15 | | kevin86: white lures the king away and wins bishop for two pawns...and the game. |
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May-07-15
 | | Jimfromprovidence: <superpatzer77> <48. Ke5! is the only move for a win> <It's correct because White has to get the a8-h1 diagonal clear for his bishop. Don't block the bishop path with 48. Ke4??.> Can't we globalize this statement to include the king moving to any dark square on move 48? Maybe it's true to further say that white wins with any king move that does not block the a8-h1 or a6-f1 diagonals, like 48 Ke6!?
click for larger view |
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May-07-15
 | | chrisowen: Wad f4 at in man go she goes am good for as put in kind plus again manage have at he bind e5 spot back be hew in bottle fob off ive in bon as toe vet the line e5 bull shine nebula c7 and vantage c8 the man i c8 why interpret ebony in am changes point down mink coat over change in effect mack kit a find flurry it lit up in uniform again appraisal on the road c8 target i chagrin not an easy win by any means and over serve then straight port of call e5 or donkey e7 under over still bad for black aid pilt e5 down am man lip kip lap find podium finish am loot district again crevice c8 ogled it crux ray band ive c8 elevate chin reply c6 after give e5 since at king's pave flow flap engage face pin f4 all good a boon, boat take an down tad bat feather c8 in boa hub over ive f4 blush am toe, |
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May-07-15
| | chrisowen: Some it nip in do bid as numbers up in tenance at have ja mint over alive no more abreast c8 an angle sons among i do quaver c7 tickles c8 hive an bet i dutiful crum pivot able xray again rev each gain downs the hatch a6 aids care every good chance for am win at cad be bod an bet rack to raid aim dead arm deal clink lane delve duos dream i co-determine factor glide efface off i among ash dead try deem and deal beset effort in spades king's at flap e5 engage e7 at maybe a draw am flack churlish am dug act glorify of door c7 as put i another bind ave i et tu brute king's at pave flow e5 rims e7 ment quarter c8 backer ash good check in f3 effect aim bind in act fluffs e7 ment rails am cad a6 bishop curious c8 bind catch erm i man clink free cream i do to da house king's at face e5 pin f4 duo find i cutoff point head heaps i clarify c8 i hoodwink ash clang 35.f4+ ado finds at spot ado much erm in at our c8 arrives chemistry back in motion bad ogle an code fat chance at dad over c8 for fade on a dog hit a while go build again aid ogle jade on dock again load am odd add on at doot am podium finish quotad road at flurry it sod in save sad over toad for driver chain c6 am dove tail woa dip ya do in low as nob can con fountain sprung c7 gone away from him c8 honour ion electric belt up have jonty c6 roads change ever choose an knocker chin long as money pockets noony am non plus pontificate quorn hash wrong e6 lines a6 padre against affable c8 in am good ebony no use tonnage in again i nova now exhonorate church of reaside ave am e6 in won at c8 house at yonder hill ash finds act fangs and fable mission select arm feats of endurance in uniform appraisal on the road ave the feel found force act frown ash fakes left and goes c8 right act foods and fluff angle arm foggy patcher flash in the pan f4 at fumes and funds light advantage off re a6 you came c8 light ash floor and flips the script fords and fires lake the foots above the rest e5 fats and flume favorfawns c6 faxes ever fad f4 daffy duck five find difficult re as on good backs a6 enter am c8 in elevates an diffuse as definate chip deaf pawn deffy in light ash flids and fiddle fond ford fan f4 dangle offed it eddy am wave in c7 safe find sac fed it edict in since vow am good find mince food as boot ie appraise creatives the natures c8 am potato one hot spud c8 of fluffed it edge in shall demonstrate chances c8 agile on gun e6 back lab duff c8 aloof e6 an fresh one light c6 up again create c7 hampers c8 i envision at ever awe in win church of reason ar blips a6 enact c8 good ash flows 35...Kxf4 36.c6 h5 37.c7 h4 38.c8Q Bxc8 39.Bxe8 g5 back que need it edict in have channels again cruise at wave in ash teethheld 39...Ke4 1 point ahead cast an d7 at should win also in creative spark plug ash c8 erm in at our behest d7 an glesson c8 at slide off over c8 in door 40.Ke2 or bet beef dangle son dips again drive 40.Kd3 Ke5 41.h3 am plus two points again cruise at am packs crinkle cut f4 am good back wild shot e5 king's at flap e5 engage e7 whizz back nasty am good ply in e6 la ship bad cow horn c8 am bridge ive got etc able two heads am free hinch aloof at lift e5 bath early since c6 again common c7 angles classic c8 good ash cherubims and ive angel a6 bafflers again am go duct tape at duress mooted it edict in have hi light c8 am pain to be bevel a6 case the joint arrives again sell reenter would face i-bind in to be sac fog f4 said bon good shapee it eddy am ive over route c6 won agile at c8 bracken chainrung up the ladders choosers am good man chin ever tickle bet back vend matcher c8 internatives light in ascendancy another bind it green ave gauge slim an however c8 at i veer e6 infer enoughs wade over sheen xray in light ja bone sac bad jane c8 fonzie said give stabbed it eddy am ave route won ja ship reclude c8 am good feel turn up like radishes back lip data peck beck an call alive hive back pick aid to offload c8 in bad turkey e7 dead e5 mash tier grand in c8 crabfeets foot need it some at in ogle to be at king's ave am flap engage pave flow face pin i e2 these respective gains skim palm cone line low am good the won ship light c6 as put yin and yang dog hit ok in ogle c7 harvest c8 hope in efface off padre a6 coral e6 back bastion delineate changers true an delight c8 in bargain do up back slave bad f4 in demand choice c7 bangs c8 aim real churlish behavior as put in cad doff f4 ash flips the script. |
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| May-07-15 | | Clodhopper: Clearly not up to Thursday standards - 'cuz I got it.... |
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| May-07-15 | | Bycotron: This morning I played the white side of this ending after 39.Bxc8 against Fritz about 20 times, earning a bunch of draws and a couple losses for my effort. I was always able to draw when I stayed on clear, logical paths, but got into trouble twice when I strayed off looking for a win. If I were given my choice of black or white on the 39th move, I would only take white if I were playing at least an IM. This would assure me of a draw if I didn't take chances, but I am certain I would not win. Against anyone else, even a master, I would take the black pieces! I would be confident in securing the draw in 10~20 moves and hope for a slip by my opponent in the process. :) |
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| May-07-15 | | BOSTER: Not always the centralisation is the way to win the game. |
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May-07-15
 | | Bubo bubo: The second endgame puzzle this week!
Although I am not convinced of my solution, I propose 35.f4+. This forces the black king to leave the c-pawn's square, and after 35...Kxf4 36.c6 White will eventually win the bishop for another pawn. So far, so good, but with only two white pawns remaining, one of them being an edge pawn with a <dark> promotion square, the win for White is at least non-trivial... |
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May-08-15
 | | Fusilli: <Pulo y Gata: <beatgiant> Okay, it's not as easy as I first thought. 44...h3 is interesting and will give White some opportunities to err. Still, after some analysis, I think. that 45.g3 Kf3 46.Bxf5 Kg2 47.Ke3! should win for White. To continue: 47...Kxh2 48.Kf4 and Black has no useful move left.> Actually, that's a draw:
click for larger view48...Kg1 50.Bxg4 h2 51.Bf3 d4
click for larger viewNow after either 52.Ke4 or 52.g4, black draws with 52...Kf2! [Disclosure: computer-checked analysis.]
48.Kf2, however, wins:
click for larger view |
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| May-08-15 | | Pulo y Gata: Thanks, Fusili. |
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May-08-15
| | Fusilli: <P y G> I loved the Borges quote on your profile page. Are you Argentine? Drop me a note on my forum sometime. Cheers. |
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