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2018 Spacious-Mind Swiss Chess Computer League - Division 2
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spacious_mind
Senior Member


Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Thu Jan 18, 2018 9:54 pm    Post subject: Reply with quote

Round 3 Game 1:

W3X Chessmaster 4000 - AM68060 Sargon 3

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/g0nn7o8y


CRITICAL POSITION




In this battle of the giants, W3X Chessmaster 4000 had the best opportunity for a win in this position with the move 33. Nexf5! Unfortunately W3X Chessmaster 4000 did not see it and played 33. Nec2 instead.


FINAL POSITION



Well the game ended in a draw. Both programs played a solid game.


GAME QUALITY SUMMARY

W3X Chessmaster 4000, 60/30. (2300)
2 Inaccuracies
1 Mistakes
0 Blunders
9 Average centipawn loss

AM68060 Sargon 3, 30S. (2467)
3 Inaccuracies
1 Mistakes
0 Blunders
9 Average centipawn loss


Round 3 Game 2:

DB Rebel 6 Active - DB Chess Genius 2

RESULT: 1-0

CLICK BELOW TO REPLAY GAME

https://lichess.org/bTxsbbGj


CRITICAL POSITION




DB Rebel 6 Active has a good position from its opening book. It is in this position that the game was decided with DB Chess Genius 2 playing 9. ... a5?! Better would have been 9. ... Nbd7. After this DB Chess Genius 2 played hard for 82 moves but could never get out of trouble.


FINAL POSITION



3 games and 3 wins for DB Rebel 6 Active!


GAME QUALITY SUMMARY

DB Rebel 6 Active, 30S. (2400)
5 Inaccuracies
1 Mistakes
0 Blunders
19 Average centipawn loss

DB Chess Genius 2, 30S. (2300)
8 Inaccuracies
4 Mistakes
2 Blunders
31 Average centipawn loss


Round 3 Game 3:

DB M-Chess Pro 3.12 - DB Chess Genius 1

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/F9iXF2wm


CRITICAL POSITION




DB Chess Genius 1 had the advantage throughout this game. In this position however DB Chess Genius 1 misses a last chance for a win by not playing 60. ... Kf6! The move 60. ... g4 that was played only draws.


FINAL POSITION




GAME QUALITY SUMMARY

DB M-Chess Pro 3.12, 30S. (2350)
5 Inaccuracies
1 Mistakes
0 Blunders
19 Average centipawn loss

DB Chess Genius 1, 30S. (2200)
2 Inaccuracies
3 Mistakes
0 Blunders
19 Average centipawn loss


Round 3 Game 4:

DB Chess System Tal - DB Hiarcs 1.0

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/ojJ7p6Cd


CRITICAL POSITION




DB Hiarcs 1.0 got away with murder in this game as DB Chess System Tal must have had a thousand opportunities to win but missed on them all. The above position albeit a little complicated was one of the last opportunities. Correct sequence of White moves that were continuously missed by DB Chess System Tal were 77. Ke7! followed by 78. Nd7 and 79. Bd5... this would have allowed the safe advance of the pawn and promotion. Who knows perhaps DB Chess System Tal does not know how to checkmate with Bishop and Knight resulting in this completely incompetent endgame.

FINAL POSITION



Drawn by 3x repetition of position.


GAME QUALITY SUMMARY

DB Chess System Tal, 30S. (2300)
3 Inaccuracies
1 Mistakes
4 Blunders
42 Average centipawn loss

DB Hiarcs 1.0, 30S. (2300)
3 Inaccuracies
5 Mistakes
5 Blunders
50 Average centipawn loss

Best regards
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spacious_mind
Senior Member


Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Thu Jan 18, 2018 11:00 pm    Post subject: Reply with quote

Round 3 Game 5:

DB Psion Chess 2.13 - DB WChess 1.05

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/BH0XFm9R


CRITICAL POSITION




DB Psion Chess 2.13 just played 15. Rfe1 which was a mistake as it sets up 15. ... fxe4! 16. dxe4 16. ... Rxf3! sacrificing the Rook for the Knight and Queen winning the Pawn on h3. DB WChess 1.05 won quite easily after this.


FINAL POSITION




GAME QUALITY SUMMARY

DB Psion Chess 2.13, 30S. (2200)
6 Inaccuracies
4 Mistakes
1 Blunders
33 Average centipawn loss

DB WChess 1.05, 30S. (2400)
0 Inaccuracies
1 Mistakes
0 Blunders
14 Average centipawn loss


Round 3 Game 6:

DB Fritz 1 - DB Kallisto 1.83

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/Ycafzy1f


CRITICAL POSITION




DB Fritz 1 is ahead by a pawn but DB Kallisto 1.83 has a lot of pressure on white's position. There is only one good move in this position which is 23. Na3! DB Fritz 1 missed it and played 23. Qf1? and loses.


FINAL POSITION




GAME QUALITY SUMMARY

DB Fritz 1, 30S. (2200)
8 Inaccuracies
10 Mistakes
0 Blunders
47 Average centipawn loss

DB Kallisto 1.83, 60/30. (2332)
3 Inaccuracies
0 Mistakes
1 Blunders
28 Average centipawn loss


Round 3 Game 7:

DB Socrates 3.0 - DB Zarkov 2.61

RESULT: 1-0

CLICK BELOW TO REPLAY GAME

https://lichess.org/hJUekEqV


CRITICAL POSITION




DB Zarkov 2.61 is down a pawn against DB Socrates 3.0 but with opposite colored Bishops DB Zarkov 2.61 still has a chance for a draw. In this position however DB Zarkov 2.61 makes the game losing mistake playing 38. ... Bf1? There was no need for this move as all it does is encourage DB Socrates 3.0's King to advance forward. 38. ... Bc6 was the best move to play in this position.


FINAL POSITION




GAME QUALITY SUMMARY

DB Socrates 3.0, 30S. (2300)
2 Inaccuracies
0 Mistakes
0 Blunders
19 Average centipawn loss

DB Zarkov 2.61, 60/30. (2250)
6 Inaccuracies
2 Mistakes
2 Blunders
42 Average centipawn loss


Round 3 Game 8:

DB Nimzo Guernica - MAC Sigma Chess 4.02

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/V5jLtF8q


CRITICAL POSITION 1



For a short while it looked like MAC Sigma Chess 4.02 was going to totally destroy DB Nimzo Guernica. In the above position 22. ... Bxh2+ or 22. ... Ng4 were both killer moves. Strangely after creating this great position MAC Sigma Chess 4.02 misses these two obvious moves and instead takes the Rook with 22. ... Bxe1?

CRITICAL POSITION 2



In this position DB Nimzo Guernica finally gets a good opportunity to win this game. Since DB Nimzo Guernica is threatening checkmate , all MAC Sigma Chess 4.02 has to hope for is a draw through repetition. Here DB Nimzo Guernica should have tried 45. Nd1 which stops the repetitive checks. Follow ths with advancing the pawn on h4 to h6 and white likely wins! Anyway DB Nimzo Guernica did not see any of that and settled for draw.


FINAL POSITION



Drawn by 3x repetition of position.


GAME QUALITY SUMMARY

DB Nimzo Guernica, 60/30. (2200)
3 Inaccuracies
5 Mistakes
1 Blunders
37 Average centipawn loss

MAC Sigma Chess 4.02, 30S. (2300)
1 Inaccuracies
5 Mistakes
1 Blunders
38 Average centipawn loss

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spacious_mind
Senior Member


Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Thu Jan 18, 2018 11:56 pm    Post subject: Reply with quote

Round 3 Game 9:

DB Fritz 2 - MAC Gnu Chess 4.0

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/0M2wOBN0


CRITICAL POSITION



DB Fritz 2 has given me the non pleasure of playing the most torturous and frustrating game that I have played in in 10 years. The last time I experienced this was playing a few games with some 1000 ELO programs in a U1400 tournament 10 years ago. This game was horrible.

In the above postion DB Fritz 2 who had already missed countless opportunities to win easily, reaches the above endgame with Queen of f6 placed greatly to not only trap the Black's King but also advance the pawn on e4 for a quick win.

Well Ripley, believe it or not! The game ends in a draw after 10 DB Fritz 2 blunders according Lichess. Which had to be a record only to be beaten by the opponent MAC Gnu Chess 4.0 who made 14 Blunders!

This really confirms the theory that Morsch programs were clueless at endgames!! Smile


FINAL POSITION




GAME QUALITY SUMMARY

DB Fritz 2, 30S. (2250)
7 Inaccuracies
5 Mistakes
10 Blunders
84 Average centipawn loss

MAC Gnu Chess 4.0, 30S. (2150)
5 Inaccuracies
9 Mistakes
14 Blunders
96 Average centipawn loss

Just take a look at those inaccuracies, mistakes, blunders and centipawn losses!! Smile


Round 3 Game 10:

W3X Gnu Chess 3.21 - DB Kasparov Gambit

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/2BU966CE


FINAL POSITION



DB Kasparov Gambit had a comfortable win against W3X Gnu Chess 3.21.


GAME QUALITY SUMMARY

W3X Gnu Chess 3.21, 60/30. (2250)
7 Inaccuracies
6 Mistakes
3 Blunders
44 Average centipawn loss

DB Kasparov Gambit, 30S. (2250)
4 Inaccuracies
2 Mistakes
0 Blunders
24 Average centipawn loss


Round 3 Game 11:

W3X K-Chess 2.0 - DB M-Chess 1.71

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/cnF9E6Vu


CRITICAL POSITION




W3X K-Chess 2.0 had a great position here with 23. Qh5! looking very strong. Strangely however W3X K-Chess 2.0 plays 23. c4? and the opportunity is gone. After this DB M-Chess 1.71 gets going and ends up winning easily.


FINAL POSITION




GAME QUALITY SUMMARY

W3X K-Chess 2.0, 30S. (2150)
2 Inaccuracies
5 Mistakes
2 Blunders
53 Average centipawn loss

DB M-Chess 1.71, 30S. (2250)
3 Inaccuracies
2 Mistakes
0 Blunders
24 Average centipawn loss


Round 3 Game 12:

Millennium Chess Genius Pro - Mephisto Atlanta

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/I3Ll4qk2


CRITICAL POSITION 1



Here I was complaining about Morsch earlier when in what seems to be a drawn end game, Lang's Millennium Chess Genius Pro just blundered and played 77. Nc2? Now all Mephisto Atlanta has to do is play 77. ... Kc4! and the game is won! But no such luck Sad Mephisto Atlanta plays 77. ... Kd6? and I thought to myself here we go again!

CRITICAL POSITION 2



Well anyway a couple of moves later Millennium Chess Genius Pro seems to think that it can force the white pawn on f6 to success and completely ignores Black's two pawn. Thinking that perhaps the Knight on c2 is sufficient to stop them.

Anyway instead of retreating the King with the move 79. Kf5! that should still draw decides instead to play 79. Kg7? and lose the game.


FINAL POSITION



Well this does make you wonder who was worse in endgames Morsch or Lang? Smile

The game was well played by both until the endgame Rolling Eyes


GAME QUALITY SUMMARY

Millennium Chess Genius Pro, 30S. (2307)
4 Inaccuracies
4 Mistakes
3 Blunders
36 Average centipawn loss

Mephisto Atlanta, 30S. (2270)
2 Inaccuracies
2 Mistakes
2 Blunders
24 Average centipawn loss

3 games and 3 losses for Millennium Chess Genius Pro. Not a great start Sad (And yes before someone asks... Power saver is OFF!!)

Best regards
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spacious_mind
Senior Member


Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Fri Jan 19, 2018 12:36 pm    Post subject: Reply with quote

Round 3 Game 13:

W3X LChess 3.0 - MAC MacChess 2.5

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/LPVfcqk5


FINAL POSITION



MAC MacChess 2.5 gets its first win defeating W3X LChess 3.0.


GAME QUALITY SUMMARY

W3X LChess 3.0, 30S. (2100)
3 Inaccuracies
4 Mistakes
1 Blunders
43 Average centipawn loss

MAC MacChess 2.5, 30S. (2300)
5 Inaccuracies
0 Mistakes
0 Blunders
18 Average centipawn loss


Round 3 Game 14:

MAC Sargon 4 - W3X Arasan 2.0

RESULT: 1-0

CLICK BELOW TO REPLAY GAME

https://lichess.org/H7oZHh48


CRITICAL POSITION




MAC Sargon 4 also gets its first win of this tournament beating W3X Arasan 2.0. In this position MAC Sargon 4 leads by a pawn but everything is still pretty even. W3X Arasan 2.0 played 24. ... Kb6? which really was not the best as it encourages the advancement of the passed a and b pawns which was decisive.


FINAL POSITION




GAME QUALITY SUMMARY

MAC Sargon 4, 30S. (2200)
2 Inaccuracies
3 Mistakes
0 Blunders
28 Average centipawn loss

W3X Arasan 2.0, 60/30. (2300)
2 Inaccuracies
9 Mistakes
0 Blunders
51 Average centipawn loss


Round 3 Game 15:

MAC RD Chess 2.2.2 - DB Gandalf 2.1

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/rtsxQftv



FINAL POSITION



DB Gandalf 2.1 easily beats MAC RD Chess 2.2.2 to get its first first point.


GAME QUALITY SUMMARY

MAC RD Chess 2.2.2, 30S. (2100)
4 Inaccuracies
6 Mistakes
1 Blunders
61 Average centipawn loss

DB Gandalf 2.1, 30S. (2250)
3 Inaccuracies
2 Mistakes
0 Blunders
26 Average centipawn loss


ROUND 3 RESULTS




TABLE AFTER ROUND 3



DB Rebel 6 Active is top with a 100% record after 3 games.

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spacious_mind
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Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Fri Jan 19, 2018 12:43 pm    Post subject: Reply with quote

DIVISION 2 FINAL RANKINGS PREDICTOR AFTER 3 ROUNDS



The average performance dropped to ELO 2094 which is lower than the average at the end of the Division 3 tournament. This is primarily due to that Fritz 2 game against MAC Gnu Chess where both scored really badly.

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spacious_mind
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Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Fri Jan 19, 2018 12:50 pm    Post subject: Reply with quote

DIVISION 2 ROUND 4 SCHEDULE



There are some really good matches coming up in Round 4 at the top of the table.

Millennium Chess Genius Pro plays bottom of the table MAC RD Chess 2.2.2 and hopefully will get its first win! Smile


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TracySMiller
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Joined: 13 Mar 2016
Posts: 191
Full Name: Tracy S. Miller
Location: Kingsport, TN

PostPosted: Fri Jan 19, 2018 9:19 pm    Post subject: Reply with quote

Very cool games. My top five are in places 1, 3, 4, 6, and 18th. Not too shabby. Long way to go, though.
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spacious_mind
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Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Fri Jan 19, 2018 11:30 pm    Post subject: Reply with quote

TracySMiller wrote:
Very cool games. My top five are in places 1, 3, 4, 6, and 18th. Not too shabby. Long way to go, though.


Yep and Dave is 1, 2, 4, 8 and 28.

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Chessmaster Ireland
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Joined: 18 Feb 2009
Posts: 569

PostPosted: Sat Jan 20, 2018 9:12 am    Post subject: Reply with quote

Hi Nick

Pity ChessGenius 3 wasn't playing.

I only say this because when I tested ChessGenius 1, ChessGenius 2 & ChessGenius 3 with your positional rating test, CG1 got your highest rating followed by CG2. I don't know why I didn't send you the results but they where done on my previous PC which went belly up so maybe that is why?

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Bryan
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spacious_mind
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Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Sat Jan 20, 2018 10:31 am    Post subject: Reply with quote

Chessmaster Ireland wrote:
Hi Nick

Pity ChessGenius 3 wasn't playing.

I only say this because when I tested ChessGenius 1, ChessGenius 2 & ChessGenius 3 with your positional rating test, CG1 got your highest rating followed by CG2. I don't know why I didn't send you the results but they where done on my previous PC which went belly up so maybe that is why?

Regards
Bryan


Hi Bryan,

I have not forgotten about Chess Genius 3. Planning to include it later in Division 1.

So far CG1 has impressed me more than CG2 in this tournament.

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Nick
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IvenGO
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Joined: 18 Oct 2011
Posts: 287
Location: Moscow, Russia

PostPosted: Sat Jan 20, 2018 1:42 pm    Post subject: Reply with quote

Hi Nick, I wonder why Mirage-2 wasnt included in any division (but Siberian took a part in it). Great tourney project anyway, thanks!
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spacious_mind
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PostPosted: Sun Jan 21, 2018 10:31 am    Post subject: Reply with quote

IvenGO wrote:
Hi Nick, I wonder why Mirage-2 wasnt included in any division (but Siberian took a part in it). Great tourney project anyway, thanks!


Hi Ivan,

Yes, I thought about Mirage, but the version I have I could never get working with DOSBox. DOSBox closes after the Mirage start screen starts. So in the end I gave up about including it in the tournament.

regards
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spacious_mind
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Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Sun Jan 21, 2018 11:59 am    Post subject: Reply with quote

Round 4 Game 1:

AM68060 Sargon 3 - DB Rebel 6 Active

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/y5lNAPqq


CRITICAL POSITION




Wow in this top of the table battle no one gave an inch to the opponent playing a Vienna Gambit. In the above position AM68060 Sargon 3 risked it all taking black's last queenside pawns to go a pawn up in the end game. DB Rebel 6 Active however has that strong passed pawn on h4 and in the end AM68060 Sargon 3 had to give up the Rook to stop it. However since it required both black's Rook and King to force the Queen promotion, there was nothing that DB Rebel 6 Active could do other than sactifice its own Rook in the end to stop the two advancing white pawns and accept a draw.


FINAL POSITION



This was a fight to the bitter end!


GAME QUALITY SUMMARY

AM68060 Sargon 3, 30S. (2467)
1 Inaccuracies
0 Mistakes
0 Blunders
4 Average centipawn loss

DB Rebel 6 Active, 30S. (2400)
0 Inaccuracies
0 Mistakes
0 Blunders
4 Average centipawn loss

Almost perfection from both players!


Round 4 Game 2:

DB Chess Genius 1 - W3X Chessmaster 4000

RESULT: 1-0

CLICK BELOW TO REPLAY GAME

https://lichess.org/kheb368p


CRITICAL POSITION




DB Chess Genius 1 had a slight edge throughout in this Pirc Defense, Austrian Attack game. In the above position W3X Chessmaster 4000 makes that one critical mistake by taking the white pawn on h5 with 31. ... gxh5? This allowed DB Chess Genius 1 to break through with both Rooks on the Kingside and there was nothing that W3X Chessmaster 4000 could do to stop it. Better moves in the above position would have been either 31. ... a6 or 31. ... Ke6.


FINAL POSITION



The strength of DB Chess Genius 1 often gets ignored as a result of the later CG2 and CG3 versions. However CG1 is well capable of beating anyone as shown in this tournament so far.


GAME QUALITY SUMMARY

DB Chess Genius 1, 30S. (2200)
2 Inaccuracies
0 Mistakes
0 Blunders
14 Average centipawn loss

W3X Chessmaster 4000, 60/30. (2300)
6 Inaccuracies
4 Mistakes
1 Blunders
28 Average centipawn loss


Round 4 Game 3:

DB Chess Genius 2 - DB M-Chess Pro 3.12

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/ohK7vY0V


CRITICAL POSITION




In the early part of the game DB Chess Genius 2 had the advantage but let it slip away. The above position is critical, DB Chess Genius 2 has a Bishop and 3 pawns for a Rook but DB M-Chess Pro 3.12 has a strong attack against the King. There is only one move that is good for white which is 35. Qh1! Everything else loses. Unfortunately DB Chess Genius 2 misses this move and plays 35. Kd3? and loses the game.


FINAL POSITION




GAME QUALITY SUMMARY

DB Chess Genius 2, 30S. (2300)
2 Inaccuracies
8 Mistakes
4 Blunders
47 Average centipawn loss

DB M-Chess Pro 3.12, 30S. (2350)
5 Inaccuracies
5 Mistakes
0 Blunders
30 Average centipawn loss


Round 4 Game 4:

DB WChess 1.05 - DB Socrates 3.0

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/3rGAzcfq


CRITICAL POSITION 1



DB WChess 1.05 surprisingly started the game with 1. g4? playing a Grob Gambit. This of course gave DB Socrates 3.0 an immediate pawn advantage and DB Socrates 3.0 is too good to try this against.


CRITICAL POSITION 2



This position after 20 moves is about as close as what DB WChess 1.05 got with salvaging a draw. 21. Rh8! might have been the best chance here. DB WChess 1.05 played 21. Rg1 which was more passive and not quite as good.

FINAL POSITION



Well DB WChess 1.05 lasted 90 moves but the outcome was inevitable after the first move. It does make me wonder if I was being fair allowing DB WChess 1.05 to play 1. g4? but then again the first rule of Computer tournament play is NO HUMAN INTERFERENCE IN GAMES BEING PLAYED! Smile


GAME QUALITY SUMMARY

DB WChess 1.05, 30S. (2400)
9 Inaccuracies
8 Mistakes
0 Blunders
28 Average centipawn loss

DB Socrates 3.0, 30S. (2300)
4 Inaccuracies
1 Mistakes
0 Blunders
16 Average centipawn loss

Well, DB WChess 1.05 will just have to work harder in the rest of its games to make up for this unfotunate loss of a point.

Anyway who is to say that DB Socrates 3.0 who is also a strong program might not have won anyway regardless of what opening was played Smile

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spacious_mind
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Joined: 01 Aug 2007
Posts: 3202
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PostPosted: Sun Jan 21, 2018 1:22 pm    Post subject: Reply with quote

Round 4 Game 5:

DB Kasparov Gambit - DB Kallisto 1.83

RESULT: 1-0

CLICK BELOW TO REPLAY GAME

https://lichess.org/wrHUhY6n


CRITICAL POSITION



DB Kasparov Gambit had the initiative throughout this game. However by the time the above position was reached DB Kallisto 1.83 had worked its way back into the game with some good chances for at least a draw. But, unfortunately in this position is also where DB Kallisto 1.83 makes that crucial mistake that loses the game. 61. ... Re7! is the correct move which prepares the advancement of the pawn on e4. DB Kallisto 1.83 played 61. ... Rb4. After 61. ... Rb4 DB Kasparov Gambit should have played 62. Rh3! immediately for a quick win but missed it and played instead 62. Rb3. DB Kallisto 1.83 however helped DB Kasparov Gambit out by exchanging the the Rooks with the move 62. ... Rxb3... after which everything became a lot easier for DB Kasparov Gambit to win this game.


FINAL POSITION




GAME QUALITY SUMMARY

DB Kasparov Gambit1, 30S. (2250)
9 Inaccuracies
8 Mistakes
0 Blunders
38 Average centipawn loss

DB Kallisto 1.83, 60/30. (2332)
20 Inaccuracies
10 Mistakes
3 Blunders
51 Average centipawn loss


Round 4 Game 6:

DB Hiarcs 1.0 - DB M-Chess 1.71

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/dQMDMLsb


CRITICAL POSITION




This position is critical as DB M-Chess 1.71 is a pawn up and has good initiative and position of its pieces. DB Hiarcs 1.0 must have been worried about the black move Rxd4 and therefore moves its King away from the pin with 39. Kd2?!. However since DB Hiarcs 1.0 position was so defensive and cramped, this move was not the best to have a chance at a draw. Best here was 39. g5! followed by 40. Ra2! as these two moves would have allowed DB Hiarcs 1.0 repetitive checks by threatening to move its Rook to a8! with Queen assistance as a result of this 39. ... g5! freeing up move. Anyway there was not much that DB Hiarcs 1.0 could do to stop DB M-Chess 1.71 from wnning this game after 39. Kd2?!


FINAL POSITION




GAME QUALITY SUMMARY

DB Hiarcs 1.0, 30S. (2300)
6 Inaccuracies
2 Mistakes
2 Blunders
34 Average centipawn loss

DB M-Chess 1.71, 30S. (2250)
2 Inaccuracies
1 Mistakes
0 Blunders
15 Average centipawn loss


Round 4 Game 7:

Mephisto Atlanta - DB Chess System Tal

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/cajlTmET


CRITICAL POSITION




Just like DB WChess 1.05 in the earlier posted game, Mephisto Atlanta plays a dubious Urusov Gambit opening with almost zero compensation for the pawn sacrifice. This is the position shortly after Mephisto Atlanta and DB Chess System Tal were out of their opening book. No compensation, nothing doing for Mephisto Atlanta.


FINAL POSITION



No surprsingly, DB Chess System Tal wins comfortably.


GAME QUALITY SUMMARY

Mephisto Atlanta, 30S. (2270)
4 Inaccuracies
7 Mistakes
0 Blunders
33 Average centipawn loss

DB Chess System Tal, 30S. (2300)
1 Inaccuracies
0 Mistakes
0 Blunders
14 Average centipawn loss


Round 4 Game 8:

MAC Gnu Chess 4.0 - MAC Sigma Chess 4.02

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/EuOFs77A


CRITICAL POSITION 1



MAC Sigma Chess 4.02 is up a Bishop for two pawns but MAC Gnu Chess 4.0 still had a small chance for something in this position with the move 46. Nd5! But anwyay MAC Gnu Chess 4.0 played 46. Qa1 and that lost quickly.


FINAL POSITION




GAME QUALITY SUMMARY

MAC Gnu Chess 4.0, 30S. (2150)
8 Inaccuracies
4 Mistakes
2 Blunders
39 Average centipawn loss

MAC Sigma Chess 4.02, 30S. (2300)
5 Inaccuracies
4 Mistakes
0 Blunders
24 Average centipawn loss

Best regards
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spacious_mind
Senior Member


Joined: 01 Aug 2007
Posts: 3202
Location: Alabama

PostPosted: Sun Jan 21, 2018 2:27 pm    Post subject: Reply with quote

Round 4 Game 9:

DB Nimzo Guernica - DB Psion Chess 2.13

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/b7H5i2FJ


CRITICAL POSITION



DB Nimzo Guernica who had been ahead for most of this game had in the last few moves allowed the advantage to slip away. In this position DB Nimzo Guernica now blunders with the move 40. bxc4? and ends up losing easily. The alternative was to give up the Rook for the Bishop with a slight chance for survival but obviously DB Nimzo Guernica did not like giving up the Rook.


FINAL POSITION




GAME QUALITY SUMMARY

DB Nimzo Guernica, 60/30. (2200)
6 Inaccuracies
7 Mistakes
1 Blunders
36 Average centipawn loss

DB Psion Chess 2.13, 30S. (2200)
4 Inaccuracies
2 Mistakes
0 Blunders
20 Average centipawn loss


Round 4 Game 10:

DB Gandalf 2.1 - DB Fritz 2

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/eE0ZTNjN


CRITICAL POSITION




DB Gandalf 2.1 who had previously missed some good opportunities to win this game as a result of some DB Fritz 2 mistakes gets a last chance for a win in this endgame position. Both 51. Rb6+ and 51. Kd3! win but 51. Kd3! is best because after 52. Kc2! it frees up the Rook to assist the two white pawns. Anyway DB Gandalf 2.1 missed several opportunites and DB Fritz 2 gets a lucky draw.


FINAL POSITION




GAME QUALITY SUMMARY

DB Gandalf 2.1, 30S. (2250)
6 Inaccuracies
0 Mistakes
2 Blunders
33 Average centipawn loss

DB Fritz 2, 30S. (2250)
6 Inaccuracies
3 Mistakes
1 Blunders
34 Average centipawn loss


Round 4 Game 11:

MAC MacChess 2.5 - MAC Sargon 4

RESULT: 1/2-1/2

CLICK BELOW TO REPLAY GAME

https://lichess.org/Btf3gNPf


CRITICAL POSITION 1




MAC MacChess 2.5 misses its best opportunity in this position with the move 19. d4! which was interesting and oh so full of traps! Anyway MAC MacChess 2.5 missed it and played 19. Nxd7 which immediately gave MAC Sargon 4 a great advantage.


CRITICAL POSITION 2




This position is great too! MAC Sargon 4 now has a big advantage but misses a nice combination with the moves 25. ... Rxd4! 26. Qxd4 Qxe5 27. Qxe5 Nd3+! or the variation 25. ... Rxd4! 26. Bxd4 Bg5! 27. Qxg5 Qxc4+ 28. Kd1 Qxd4+ which would have won easily. Well MAC Sargon 4 played 25. ... Nd3+ which is not so good and in the end has to accept a draw through 3x repetition of position.


FINAL POSITION




GAME QUALITY SUMMARY

MAC MacChess 2.5, 30S. (2300)
0 Inaccuracies
3 Mistakes
1 Blunders
30 Average centipawn loss

MAC Sargon 4, 30S. (2200)
6 Inaccuracies
0 Mistakes
1 Blunders
30 Average centipawn loss


Round 4 Game 12:

W3X Gnu Chess 3.21 - DB Zarkov 2.61

RESULT: 0-1

CLICK BELOW TO REPLAY GAME

https://lichess.org/UlMN8CvW



FINAL POSITION



W3X Gnu Chess 3.21 makes too many mistakes and DB Zarkov 2.61 checkmates its opponent in just 34 moves.


GAME QUALITY SUMMARY

W3X Gnu Chess 3.21, 60/30. (2150)
6 Inaccuracies
5 Mistakes
2 Blunders
57 Average centipawn loss

DB Zarkov 2.61, 60/30. (2250)
1 Inaccuracies
3 Mistakes
0 Blunders
28 Average centipawn loss

Best regards
_________________
Nick
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