Hi All,
FYI, Shredder tries to emulate a human playing chess.
Jim H
==========
Jim Homme
Skype: jim.homme
FreeChess: jhomme
Twitter: <https://twitter.com/jimhome> jimhomme
Facebook: jimhomme
Website: <https://www.jimhomme.com/> jimhomme.com
From: usbca_chess-bounce@xxxxxxxxxxxxx <usbca_chess-bounce@xxxxxxxxxxxxx> On
Behalf Of mordue andrew (Redacted sender "tyson.mordue" for DMARC)
Sent: Monday, June 1, 2020 4:00 PM
To: usbca_chess <usbca_chess@xxxxxxxxxxxxx>
Subject: [usbca_chess] Reese vs Shredder
Hello everyone,
Some observations on Reese vs Shredder. The engine has played a very poor
positional game and is getting well stuffed before Evan makes his only serious
error. However, the engine then makes a huge blunder of its own and drops two
pieces.
[White "REESE, E."]
[Black "SHREDDER"]
[Result "1-0"]
[ECO "B50"]
[Annotator "Mordue,Tyson"]
[PlyCount "69"]
[EventDate "2020.??.??"]
1. e4 c5
2. Nf3 d6
3. Bc4
{This is okay but if you play this against the Sicilian Defence then you must
follow up with d2-d4 shortly afterwards. Playing d2-d3 allows Black to
embarrass the Bishop with ...e7-e6 and d6 (d7) -d5, and I have done this on
countless occasions. Do not be afraid to play open Sicilians!}
3...Nc6
4. d3 Bg4
5. O-O Nf6
6. Be3 a5?
{A dreadful move that loses control of b5 so Black will never have play on the
Queenside.}
7. Nbd2 a4
8. Bb5
{I might have played 8 a3 just to halt the further advance of the Black a-Pawn.
Yes, you just saw Tyson advocate a Pawn to Rook Three. However, Evan's move is
okay even though it moves a piece twice in the opening. It's on a better square
where it pins an enemy piece and it also allows Nc4 on the next move.}
8...e5?
{And now a permanent weakening of d5 as well.
9. Nc4 h5?
(And a weakening og g5 that White promptly exploits. Deep Rybka says White is
+0.65.}
10. Bg5 Qc7?
{Another error allowing the shattering of the Kingside Pawns with 11 Bxf6 gxf6,
and then play for control of f5 or d5 by going 12 h3 now that Black can't
maintain the pin with12...Bh5.}
11. Re1 Be7
12. c3 Rg8?
[Removing the possibility of castling Kingside. Deep Rybka' evaluation goes
from 0.65 up to 1.45 for just this one error. I do have a recent precedent in
my own praxis but I'm not going to put it here.}
13. d4 cxd4
14. cxd4 Bxf3
15.Qxf3
{There's nothing wrong with 15 gxf3 either in this particular scenario, but
after Black's next move his position is shattered and Deep Rybka has White at
+2.57.} . ..
15...exd4?
16. Rad1
This is a good centralising move. However, with the Black King stuck in the
centre Deep Rybka says White should play 16 e5! blasting the middle open and a
plus of 4.44! Notice the effect of pinning the Knight on c6 and the possible
pin on the e7 Bishop allowing captures on f6.
16...Kf8
{Unpinning is always good but this would have been better last move. Note also
that this square is a cul-de-sac. The Rook and the g7 Pawn deny the Black King
any flight squares. See later on.
17. Qg3 b6?
{Another awful Pawn move unhinging the c6 Knight. Evan decides to regroup the
c4 Knight and has the incidental threat of 19 Rc1 pinning and winning the c6
steed.}
18. Nd2 Qb7
19. Nf3 Ra5
20. Bc4?
{Simpler was 20 Bxc6 Qxc6 21 Nxd4 regaining the Pawn and heading for the lovely
f5 square. Now Black keeps his extra pawn and improves his position by pushing
the Bishop around.}
20...Rc5
21. b3 b5
22. Bd3 axb3
23. axb3 Qc7
24. Nh4
{The Knight heads off to the f5 square anyway. Deep Rybka evaluates the
position as +0.56 to White (a large drop since move 16) and suggests 24...Rc3,
while I pondered 24...g6 stopping the Knight in its tracks, although 25 Bh6+
forces the King back into the centre.}
24...Qc8
{Trying to head to g4 to swap Queens. White's next move just happens to prevent
this, and I have to query whether the Queen is any better on c8 than it was on
c7.}
25. Nf5 Qd7
{A loss of a tempo, but White might have been threatening 26 Nxe7 Kxe7 (to
defend d6) 27 Bxf6+ inflicting more damage on Black's Pawns because 27...Kxf6
loses the c5 Rook after 28 Qxd6+. Note that 27...gxf6 doesn't lose the g8 Rook
because it's defended laterally by the Black Queen. However, the f5 Knight and
g5 Bishop are clearly better pieces than their counterparts on f6 and e7 so
White didn't have to play this.}
26. Ra1
{Occupying an open file and White's plus goes nearly all the way back up to +2.
Evan has been playing simple positional chess while Black is messing around
with his Queen.}
26...Qe8
27. Nxe7
{This move is not an error by itself but in conjunction with White's next it
is. If 27 Nxd6 Rxg5 is worth analysing.}
27...Nxe7
28. Qxd6!?
{Overlooking that the Bishop is now en prise with no defender. Instead 28 Bf4
forces a complete collapse now that the e7 Bishop has gone.}
28...Rxg5
{However, Evan's positional plus is so great that Deep Rybka suggest both 29 e5
and 29 Ra7 and still has White at +3 or so. Note that the g8 Rook does nothing
constructive but it does stop the Black King going to g8 to unpin the e7
Knight.}
29. Qxd4?
{Releasing some of the pressure and Deep Rybka says the position is now equal
... for the first time since move 1? Cue theoretical debate!}
29...Qd7??
{A crashing blunder that loses a Knight and a Rook. 29...Qb8 stops 30 Ra7.
After White's reply the evaluation goes from equal to over +8.}
30. Ra8+ Nc8
31. Qxd7 Nxd7
32. Rxc8+
{To lose one piece may be considered unfortunate ...}
32...Ke7
33. Rxg8
{But to lose two is just carelessness. The inactive Rook perishes having done
nothing all game.}
33...h4
34.Rh8 Rc5
35. Rxh4 1-0
Conclusion: An awful game by the engine and in no way representaive of a 1400
player. Evan's positional play is good apart from a backwards sequence from
moves 17-23. It would be useful to know what the time limits were.
Further comment is invited. More games by anyone are definitely encouraged!
Regards,
Tyson
