Re: Please Analyze this game between Easy Level & Chrisf

On Apr 21, 9:21=A0am, Sanny <softta...@[EMAIL PROTECTED]
> wrote:
> Please analyze the Best game between Zebediah & Advance Level.
>
> Advance level was ahead of a Rook but later Zebediah took back the
> Rook and was able to win the Game in just 23 moves.

Advance level was never ahead. It was already in a bit of trouble
after 6. ... BxN
Grabbing the rook later isn't sufficient compensation for the damage
done to blacks kingside and the total lack of development queenside.
>
> Advance is the Highest Level. So it is the Best GetClub Chess can
> ever play.
>
> Can you spot any weakness in this Game?

Yes at least in GetClubs play...

> White -- Black
> (zebediah) -- (advance)
>
> 1. e2-e4{4} e7-e6{0}
> 2. d2-d4{4} c7-c5{2418}
> 3. Ng1-f3{25518} c5-d4{0}
> 4. Nf3-d4{6} Ng8-f6{1652}
> 5. Nb1-c3{236} Bf8-b4{2128}
> 6. e4-e5{18} Bb4-c3{3308}

This is already giving white the advantage of more than a pawn. This
position was in the database 15 times and white won 12 of these. There
then follows an almost forced sequence of moves (the PV is clearly
defined at >200cp). And at move 10. white has a choice of winning
moves (fxg7 and c3 equally good).

> 7. b2-c3{420} Qd8-c7{1298}

Shredder reckons 7. ... Nd5 is the only move here that would just
about hold things together.
Something along the lines of 8. Bd3 Qc7 9. O-O  or 8. Qg4 g6 9. Nb5 O-
O

> 8. e5-f6{138} Qc7-c3{2516}

The chess engines here prefer 8. Nb5 but I think that lets black off
the hook with Qxe5  9. Qe2 QxQ
The move as played leaves black struggling just to stay alive -
although that isn't obvious to an engine with a limited search
horizon. Blacks kings rook is not long for this world so there is a
virtual material balance.

> 9. Qd1-d2{3878} Qc3-a1{0}
> 10. f6-g7{6} Rh8-g8{1390}

> 11. c2-c3{68} Qa1-b1{1802}
> 12. Bf1-d3{396} Qb1-b6{1644}
> 13. Qd2-h6{8} Qb6-c5{1642}
> 14. Ke1-g1{14} Qc5-e5{1556}

Amazingly this position has previously occurred in 4 serious matches
arising out of odd Sicilian patterns. The moves are transposed and all
of them were hopelessly lost at this point. It must have arisen in
something I have played or played through since it was already in my
customised database.

> 15. Bd3-h7{2614} Rg8-g7{1506}

Humans preferred QxB in the games I found (although Rybka & Shredder
both think RxB is better). By this stage the position is already
hopelessly lost. Getclub doesn't defend optimally though.

> 16. f2-f4{414} Rg7-h7{1658}

16. .... Rxg2+ would at least give a s****ting chance. More by delaying
the inevitable than anything else.

> 17. Qh6-h7{2948} Qe5-c5{3162}
> 18. f4-f5{654} f7-f6{2306}

18. ... d5 would cling onto life for a little bit longer but the
decline is still terminal.

> 19. f5-e6{388} d7-e6{1876}
> 20. Rf1-f6{16} Ke8-d8{1578}
> 21. Bc1-g5{64} Bc8-d7{1568}
> 22. Rf6-f5{1042} Kd8-c7{2780}
> 23. Rf5-c5{4790} Kc7-b6{0}
>
--------------------------------------------------------------------------=
-=AD=AD-----
> =A0zebediah: (White)

> Was the Sacrifice of Took Correct by Zebediah?

Yes. It wasn't a sacrfice. The attack he gets is worth it. Yes he is
the exchange down for a while but his pieces are all out and he has a
defendable pawn on the 7th rank with a nuclear threat level against h7
and your rook.
>
> Is there any move wrongly played by Advance Level?

> Was the game won because of any weakness in GetClub engine?

Yes. It doesn't have sufficient selective look ahead down partially
forced lines (situations where one move is significantly better than
all the others). To be fair even the top engines struggled to see that
Qc7 doesn't really work at sensible match play time allocations and it
required a bit of human guidance to annotate correctly.
(at least I think I have got it about right - quick lunchtime attempt)

Regards,
Martin Brown