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Subject: Re: Test position who's winning ??

Author: martin fierz

Date: 18:38:51 07/24/02

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On July 24, 2002 at 06:37:40, Kurt Utzinger wrote:

>On July 24, 2002 at 04:04:20, Nolan Denson wrote:
>
>>[D]8/6p1/5nk1/R1Q4p/PP6/5rPP/4qBK1/8 w - - 0 51
>>
>>What does your engine see .... the above game ended in a draw.
>
>I think this is a draw. Black threatens to win with ...Ne4. Hence, White has
>nothing better than to play 1.Kg1 and after Qd1 2.Kg2 Qe2 and so on, we have a
>repetition of moves. Black has nothing better since the advanced pawn on the
>queen side are dangerous.
>Kurt

after your suggested 1...Ne4, i would play Qxh5 check! followed by QxRf3. so
1...Ne4 doesn't seem to be a good threat :-)

even though he is two pawns up, white should at best have a draw. he has far
more possibilites to go wrong with his weak king. the Rxg3+ lines as suggested
in another thread seem to lead to nothing because of the fortress idea. after a
sensible move like 1.Rb5 (threatening to move the a-pawn if black does nothing,
and it was suggested it was played in the game?) Nd5! is a good move. now 2.
Rb6+?! Kh7! 3. Re6 Rxf2+ 4. Qxf2 Qxe6 is surely good for black, but i'm not sure
if it's winning. the only other move for white is: 2. Kg1 and now Qd1+ 3. Kh2
Qe2 is already a draw for black, but why not try for more with 3....h4! 4. gxh4
Qd3 and black is just winning.
so what this analysis proves is that after 1. Rb5 black is doing fine. how about
other moves?
1. Kg1 Qd1+ is an immediate draw, but i think black has no more this time. with
the king on g1, the N-check on e3 is defused which is important in some lines.
for example, now the try 1. Kg1 Nd5 is no good because of 2. Ra6+ Kh7 Rd6. with
the king on g2, Ne3+ would win for black.
1. Qb6 as suggested by uri is dangerous but looks like a draw:
1... Rd3 2. Qc5 (only move) Qf3+ 3. Kh2 (only move) Nd5! (as always, the key
move for black - once the knight joins the hunt for the white king black is
doing great!) 4. Be1 (only move) Re3 5. Ra6+ (only move) Nf6 6. Bd2 Qxg3+ with a
perpetual. maybe i missed something there :-) black may have other options than
this line, white definitely has nothing more to hope for IMO.
for example, after 1. Qb6 black could try stepping the king away to h7, where it
is a bit more sheltered, and leave white to figure out what to do next...
actually, that looks pretty dangerous again for white!

aloha
  martin



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