Game 18078

  
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E. Kopasov, 2066
F. de la Foret, 2027

1/2-1/2

See game 109770




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Game 18078


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Thibault de Vassal    (2008-08-18)
Game 18078

The round robin final (in the 3rd cycle) must start... time to adjudicate this nice game (Stephenson vs. Helmer), but we may discuss it as rules allow it.

At a first sight, the game looks like a draw, does anyone have another theory ?


Thibault de Vassal    (2008-08-18 23:44:13)
Game 18078

The direct link to the game :

http://www.ficgs.com/user_page.php?page=viewer&game=18078


Andrew Stephenson    (2008-08-19 02:16:39)
Its a win !!!!

You must be joking!! Thibault its a definite win it will be over in a few moves!! If anyone thinks black can survive please suggest some moves. The key to the win is that the best black can do is reach the position in a) below with Bishop and 2 pawns v R and 1 pawn. White wins becuse his king has access to e4, the Bishop is restricted by his pawns on a7 and e5 and most importantly his passed a pawn is not advanced. It has been completely lost since move 63 ...Kxf4 Janos should have taken with the pawn 63..exf4 would have allowed him to reach a table base draw. On 66 Kd3 I had the win completely worked out and have been replying instantly since then. Adjudicating this is a draw is just plain wrong. Anyone who spends time on this position will see the win I have outlined and that there is no defence. The winning method is to force an exchange of rooks by Rc4-g4 with mating threats against the Black king - black cannot allow this and must play Rd4 allowing exchange of a pair rooks when the resulting R+P v B+P+P is won. Before playing Rc4 white checks with the other rook to cut off the f file. The only way to avoid the rook exchange is to allow the white King access to e4 - at the moment the black rook cuts off d3 and the bishop if it goes to b6 will cut off e3. If the king gets to e4 either the e5 pawn drops or the king gets to d5 and e6 either result is fatal Here are the main lines: a) 72..Bb6 73 Rg8+ Kf5 (73..Kh5 74 Rc1 Rd4 75 Rh1+ wins the rook) 74 Rf8+ Kg5 75 Rc4! Rd4 (see below a1 for 75..Bd4)76 Rxd4! exd4 77 Kd3 (This ending is completely won the white king penetrates through e4, the black bishop is useless - remove pawn at d4 and its a table base win) Here are the main lines 77... Bc5 78 Rc8 Bb6 79 Ke4 Kf6 80 f4 Kf7 81 f5 Kf6 82 Rc2 Kf7 83 Ke5 a5 84 Rc6 Bd8 85 Bc7+ Kxd4 Table base win Or 77 ...Kg6 78 Ke4 Kg7 79 Rc8 Kf6 80 f4 (if the pawn on d4 falls eg 80 ..Ba5 81 Kxd4 its a table base win) Ke7 81 f5 Kf6 82 Rc2 Ke7 (82 ..d3 83 Rc6+ Kg5 84 Rg6+ and Kxd3 = TB win) 83 Ke5 Kf7 84 Rb2 d3 85 f6 with a simple win a1)..75..Bd4 (instead of Rd4) 76 Kd3 Ba1+ 77 Ke4 Ra5 78 Rg8+ Kf6 79 Rc6+ Kf7 80 Rgc8 Ra4+ 81 Rc4 Rxc4+ (black cannot avoid exchanging) 82 Rxc4+ and this ending like the one above is completely won. eg 82... Ke6 (82...a5 83 Rc5 a4 84 Ra5 x a4 = TB win) 83 Rc6+ Kd7 84 Kd5 Bd4 85 Rh6 a5 (any Bishop moves loses a pawn = TB win) 86 Rh7+ Kd8 87 f4 x e5 = TB win b) If the Bishop does not go to b6 the white king gets via e3 to e4 and then penetrates through the white squares d5 and e6 and its over. Sample lines: b1) 72 ..Kf4/f5 73 Rf8+ Kg6 74 Ke3 Rd1 75 Ke4 Re1+ 76 Kd5 Be7 77 Re8 Bf6 78 Ke6 e4 79 Rc5+ and the bishop is lost b2) 72..Ba5 73 Ke3 Rb5 74 Rg8+ Kf5 75 Rf8+ Kg5 76 Ke4 Rb4+ 77 Kxe5 with a simple win b3)72 ..Rd7 73 Rxe5+ (take a pair of rooks off = TB win) Kf4 74 Rcc5 Rg7 75 Re4+ Kg3 76 Rc1 Bb6 77 Rh1 a5 78 Rhh4 - Reg4+ exchanges rooks = TB win


Thibault de Vassal    (2008-08-19 05:44:37)
Game 18078

Hi Andrew, I must say I did not analyzed the game at all yet, I just looked at the position and trusted your previous post to Marc in the forum ('good news for you, Marc'). I'll take some time to do it soon.


Andrew Stephenson    (2008-08-19 07:33:54)
my own fault!

Ok Thibault! My good news for Mark meant I was winning so I was reducing the burden of his games - he wouldnt qualify so he has less games !! :)hence the title on my post. I think I should have been a bit more specific!


Andrew Stephenson    (2008-08-19 12:21:49)
Correction

In the analysis given below in "Its a win" under a) I omitted the move 86 Ra6 for white. It should read "85 Ra6 Bc7+ 86 Kxd4 with Table base win" and not "85 Bc7+ Kxd4 with Table base win"


Benjamin Block    (2008-08-19 16:16:49)
Ok to help?

Is it really ok to help people with out asking?


Andrew Stephenson    (2008-08-19 17:17:59)
Adjudications

Hi Benjamin I am not sure what you mean by help people without asking. The rules refer to adjudications as follows: "11. 5. Adjudications In some cases, the game continues but the result is obvious." At the end of 11.5 is states: "There are no time limit for games else but the clocks, but it may be announced that certain multi-stages tournaments will have one. At the end of this time limit, a referee committee will adjudicate games." Obviously it was bit worrying without warning to have an announcement saying hey seems like a draw I am going to adjudicate. A draw would mean that I would not win the tournament - a win means I win the tournament so its an important game. But as I am certain the game is won and can demonstrate this I am not concerned - I have no idea what Janos thinks. I dont think this is the best way to handle this but this is where we are - I am just glad it happened after Janos played 63...Kxf4 which was the losing move. We are only about 12 moves away from 6 man table base wins in almost all cases. Please post any anlysis about the position you would like as Thibault has asked for comment


Benjamin Block    (2008-08-19 18:05:13)
Yes it is white win!

I can found win but it will take a lots of move maybe in around the 100 move white will win.


Wolfgang Utesch    (2008-08-19 18:05:34)
It seems, ...

... Andrew is right!


Thibault de Vassal    (2008-08-22 19:01:06)
Game 18078 : win

Game 18078 is finally adjudicated as a win for Andrew. Sorry to Janos, that's a pity it can't finish but it is really necessary so that the next cycle can start.









 

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December 14, 2018

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