Devlog of Leorik

[algerbrex]

I think that even without an explicit king safety evaluation the engine can keep the king reasonably safe through other means. E.g. the PSQTs reward castling and an intact pawn shield in the midgame. Or the mobility eval deducts a few CP for a too mobile king. But most importantly all short-term king-safety issues should be uncovered by the search. Or at leasts that's what I'm telling myself because I'm pretty sure I'm not going to touch that cursed topic again anytime soon!

True, if Leorik has some of those features I can see it doing fine. And Blunder’s king safety isn’t great either. But for stronger engines I think it’s quite clear to tell the difference between little to know king safety, and good king safety, and that good king safety I think does start to make a big difference. But maybe at our level not so much.

[Mike Sherwin]

I've just released a "minor" new version that adds a mobility term to the evaluation along with improved time-control logic and a new TT replacement scheme better suitable for long matches.
https://github.com/lithander/Leorik/releases/tag/2.2

A gauntlet I played on 40/20 timecontrols (~500ms per move, so quite fast) looks promising:

Code: Select all

   # PLAYER           :  RATING  POINTS  PLAYED   (%)
   1 odonata-0.6.2    :  2737.0   184.5     360    51
   2 Leorik 2.0       :  2711.2  1121.5    2148    52
   3 Ceibo_0.8        :  2702.0   176.5     358    49
   4 dumb-1.9         :  2698.0   177.5     361    49
   5 Inanis-1.0.1     :  2690.0   174.0     360    48
   6 blunder-8.0.0    :  2690.0   161.0     361    45
   7 zevra-2.5        :  2655.0   153.0     348    44

2700 Elo in the CCRL lists would be a great result considering the set of changes I made. (2.1 is listed at 2583 and 2602) But I'm a bit disappointed about all the things I worked on that *didn't* make it into this release. I have spent a lot of time on trying to get King Safety to work. And also had some Bishop-specific evaluation implemented that was giving a bonus for having a bishop-pair and otherwise evaluated the placement of pieces in regards to the color of the remaining single bishop. It looked quite promising but after thorough testing I felt like it was not improving playing strength as much it should based on the reduction of MSE I saw while tuning. So I feared it was causing problems in some situations while improving the eval on average only... this is a very dangerous thing to do long term and so I decided to release a simple but solid version 2.2 and shelve the rest. Well.. wouldn't be fun if things were always easy!

Big improvement in playing style! Much more human like. Needs pawn storm code. This was a very interesting game!!

I'd be very happy if you'd try the new version. I'm very curious what your verdict will be and if you can still beat it!

I will tomorrow if my headache is better. I joined LiChess today and I played against SF levels 1 thru 5 at 5'+5". I won all the games but blundered an exchange in game 5 before managing to win. 5'+5" is a bit too fast for me because I have not practiced speed chess for 49 years. So against level 6 SF I wanted to play 15'+10" but after setting that time limit I found myself in a game against a human player. Oh no, I didn't want to play a human yet! I get nervous when I play humans and my level of play drops precipitously. I made 8 inaccuracies and two blunders. But I did not make any mistakes. This is my first rated game in ~40 years.
[pgn][Event "Rated Rapid game"]
[Site "https://lichess.org/tdFBOczO"]
[Date "2022.07.17"]
[Round "?"]
[White "MJSherwin"]
[Black "serdartopcuoglu1983"]
[Result "1-0"]
[BlackElo "1363"]
[ECO "D35"]
[Opening "QGD"]
[Variation "Exchange, 5.Bg5 Be7 6.Nf3"]
[WhiteElo "1500"]
[TimeControl "900+10"]
[Termination "normal"]
[PlyCount "93"]
[WhiteType "human"]
[BlackType "human"]

1. d4 e6 2. c4 Nf6 3. Nf3 Be7 4. Nc3 d5 5. cxd5 exd5 6. Bg5 O-O 7. e3 Ne4
8. Bxe7 Qxe7 9. Nxd5 Qd6 10. Nc3 Nf6 11. Be2 Nc6 12. O-O Qb4 13. Qc2 Be6
14. Rfd1 Rad8 15. e4 Nxd4 16. Nxd4 Rxd4 17. Rxd4 Qxd4 18. Rd1 Qc5 19. b4
Qc6 20. Bb5 Qb6 21. a3 a6 22. Ba4 Qa7 23. Bb3 c5 24. Bxe6 fxe6 25. h3 c4
26. e5 Nh5 27. Qe2 g6 28. Ne4 b5 29. Qg4 Qf7 30. Rd6 c3 31. Rc6 Qf4 32.
Nf6+ Kg7 33. Rc7+ Rf7 34. Nxh5+ Kh6 35. Nxf4 Rxc7 36. Nd3 c2 37. Qxe6 c1=Q+
38. Nxc1 Rxc1+ 39. Kh2 Rc3 40. Qf7 Rxa3 41. e6 Ra4 42. e7 Rxb4 43. e8=Q a5
44. Qef8+ Kh5 45. g4+ Kh4 46. Qf6+ g5 47. Q8h6# 1-0
[/pgn]

[Modern Times]

It slipped a little bit, but this is still an impressive gain !! Maybe the blitz testers will get the few extra Elo.

Code: Select all

CCRL 40/15 main list:
Leorik 2.2 64-bit is #155 with rating of 2695 Elo points (+26 -26),
based on 468 games: 155 wins, 149 losses and 164 draws
Score: 50.6%, Average opponent: −6.6, Draws: 35.0%

Pairwise results:
     Opponent                              Elo     Score                  LOS   Perf
 - Arminius 2018-12-23 64-bit              2735  22.5-29.5  (+15-22=15)    0.4    -4
 - Dumb 1.9 64-bit                         2724  23.0-29.0  (+12-18=22)    5.2    -6
 - Shield 2.1 64-bit                       2717  24.5-27.5  (+13-16=23)    7.3    +6
 - Blunder 8.0.0 64-bit                    2715  24.0-28.0  (+13-17=22)   24.5    -2
 - KnightX 3.2 64-bit                      2698  24.0-28.0  (+13-17=22)   43.4   -23
 - Daydreamer 1.75 64-bit                  2681  24.5-27.5  (+14-17=21)   82.1   -30
 - Supernova 2.4 64-bit                    2667  30.5-21.5  (+23-14=15)   95.7   +32
 - Movei 00.8.438                          2646  29.0-23.0  (+22-16=14)   99.9    -8
 - Pharaon 3.5.1                           2613  35.0-17.0  (+30-12=10)  100.0   +47

[algerbrex]

...

First gauntlet I ran overnight between Leorik 2.2, and Blunder 7.6.0, 8.0.0, and 8.4.5, the latest dev version, with a time control of 5+0.5s:

Code: Select all

Rank Name                          Elo     +/-   Games   Score    Draw
   0 Leorik 2.2                    110      12    2400   65.3%   27.8%
   1 Blunder 8.4.5                 -76      20     800   39.2%   29.9%
   2 Blunder 8.0.0                -115      21     800   34.0%   28.0%
   3 Blunder 7.6.0                -139      22     800   31.0%   25.5%

Finished match

This seems to indicate the issue is likely the short time control and not a regression, since though all three faired quite badly against Leorik, 8.4.5 still performed the best.

I'm going to construct another gauntlet of engines, 4 engines that I think are weaker and 4 stronger than Blunder 8.0.0, and then re-run the same gauntlet against 8.4.5. This should more definitively answer the question.

From my preliminary testing, I think Blunder appears in general quite weaker than other engines rated around 2700 on the CCRL, probably due to just not being able to compete in speed at certain time controls.

[lithander]

This seems to indicate the issue is likely the short time control and not a regression, since though all three faired quite badly against Leorik, 8.4.5 still performed the best.

Good, that there's no regression! That's a relief I'm sure. But I think there's still something strange going on... I mean 5s + 0.5s increment is not *that* fast on a modern computer. In my own tests at comparable time controls Blunder did better. 360 games at 40/20 time control ended with a score of 45% and in 224 games at a 40/60 time control Blunder had a score of 47%.

Taking the CCRL rating list into account and assuming a ~2700 rating for Leorik my results show the expected difference between our engines despite a rather low number of matches played. What opening book are you using?

Code: Select all

[tc=40/60 Hash=32]
   # PLAYER           :  RATING  POINTS  PLAYED   (%)
   1 odonata-0.6.2    :  2737.0   127.0     223    57
   2 Ceibo_0.8        :  2702.0   113.5     223    51
   3 dumb-1.9         :  2698.0   109.0     224    49
   4 Leorik 2.2        :  2695.6   671.0    1341    50
   5 Inanis-1.0.1     :  2690.0   114.0     224    51
   6 blunder-8.0.0    :  2690.0   105.5     224    47
   7 zevra-2.5        :  2655.0   101.0     223    45

[tc=40/20 Hash=32]
   # PLAYER           :  RATING  POINTS  PLAYED   (%)
   1 odonata-0.6.2    :  2737.0   184.5     360    51
   2 Leorik 2.2       :  2711.2  1121.5    2148    52
   3 Ceibo_0.8        :  2702.0   176.5     358    49
   4 dumb-1.9         :  2698.0   177.5     361    49
   5 Inanis-1.0.1     :  2690.0   174.0     360    48
   6 blunder-8.0.0    :  2690.0   161.0     361    45
   7 zevra-2.5        :  2655.0   153.0     348    44

[algerbrex]

Good, that there's no regression! That's a relief I'm sure. But I think there's still something strange going on... I mean 5s + 0.5s increment is not *that* fast on a modern computer. In my own tests at comparable time controls Blunder did better. 360 games at 40/20 time control ended with a score of 45% and in 224 games at a 40/60 time control Blunder had a score of 47%.

Right, I'm happy my work hasn't regressed Blunder's strength, but as you said, I still find it incredibly odd how much weaker Blunder is at 5s+0.5s than Leorik, even the dev versions. I suspected Blunder was weaker at shorter time controls, so I expected some gap between it and Leorik 2.2. But to be that much weaker at 5+0.5s is still very strange to me.

Even running it against other engines which should be around Blunder's rating shows Blunder 8.0.0 getting crushed:

Code: Select all

Rank Name                          Elo     +/-   Games   Score    Draw
   0 Blunder 8.0.0                 -46      11    3200   43.4%   21.8%
   1 Leorik 2.2                    131      31     400   68.0%   23.0%
   2 Nebula 2.0                    103      32     400   64.4%   16.3%
   3 Cheese 1.8 64 bits            101      31     400   64.1%   23.3%
   4 dumb 1.9                       99      31     400   63.9%   19.8%
   5 Zahak 5.0                      69      28     400   59.8%   31.5%
   6 Velvet v1.1.0                  59      31     400   58.4%   19.3%
   7 Rodin v8.00                   -54      31     400   42.3%   19.5%
   8 admete 1.5.0                 -132      32     400   31.9%   21.8%

Finished match

   # PLAYER                : RATING    POINTS  PLAYED    (%)
   1 Leorik 2.2            : 2790.1     272.0     400   68.0%
   2 Nebula 2.0            : 2761.7     257.5     400   64.4%
   3 Cheese 1.8 64 bits    : 2759.8     256.5     400   64.1%
   4 dumb 1.9              : 2757.9     255.5     400   63.9%
   5 Zahak 5.0             : 2727.2     239.0     400   59.8%
   6 Velvet v1.1.0         : 2717.3     233.5     400   58.4%
   7 Blunder 8.0.0         : 2658.0    1389.5    3200   43.4%
   8 Rodin v8.00           : 2603.2     169.0     400   42.3%
   9 admete 1.5.0          : 2524.9     127.5     400   31.9%

Admittedly, this was run at 10s+0.1s, but I've never seen Blunder perform so badly at this time control against similarly rated opponents. Nebula 2.0, in particular on the CCRL Blitz list, is rated at 2654 and Blunder 2674, but in the above test, Nebula is crushing Blunder.

For reference, I run all my testing on my laptop, which has a Ryzen 7 4700U, 8 cores, 8 GB of ram.

Taking the CCRL rating list into account and assuming a ~2700 rating for Leorik my results show the expected difference between our engines despite a rather low number of matches played. What opening book are you using?

Code: Select all

[tc=40/60 Hash=32]
   # PLAYER           :  RATING  POINTS  PLAYED   (%)
   1 odonata-0.6.2    :  2737.0   127.0     223    57
   2 Ceibo_0.8        :  2702.0   113.5     223    51
   3 dumb-1.9         :  2698.0   109.0     224    49
   4 Leorik 2.2        :  2695.6   671.0    1341    50
   5 Inanis-1.0.1     :  2690.0   114.0     224    51
   6 blunder-8.0.0    :  2690.0   105.5     224    47
   7 zevra-2.5        :  2655.0   101.0     223    45

[tc=40/20 Hash=32]
   # PLAYER           :  RATING  POINTS  PLAYED   (%)
   1 odonata-0.6.2    :  2737.0   184.5     360    51
   2 Leorik 2.2       :  2711.2  1121.5    2148    52
   3 Ceibo_0.8        :  2702.0   176.5     358    49
   4 dumb-1.9         :  2698.0   177.5     361    49
   5 Inanis-1.0.1     :  2690.0   174.0     360    48
   6 blunder-8.0.0    :  2690.0   161.0     361    45
   7 zevra-2.5        :  2655.0   153.0     348    44

I actually haven't even thought to check the opening book. I've been using the 2moves_v2 opening book for months now: I'm embarrassed to admit it, but I forgot why I even started using this opening book and have never thought to change it. Which one are you using?

[lithander]

I actually haven't even thought to check the opening book. I've been using the 2moves_v2 opening book for months now: I'm embarrassed to admit it, but I forgot why I even started using this opening book and have never thought to change it. Which one are you using?

I use the varied.bin that came with SCID and you can find it here: https://sourceforge.net/p/scid/code/ci/ ... ree/books/

I don't know much about opening books but I was wondering if your book was maybe too small or otherwise not a good at representing what the engines would face under tournament/testing conditions. In the extreme case no book is used at all and two equal strength engines basically replay the same match over and over. If one engine happens to win this game from the starting position than it would win all the time and it would look like this engine is much stronger. So I was just thinking maybe it's something to do with the openings...

I just ran a match at the same time-controls you used: 5s + 500ms increment and Hash set to 50MB on an i7-9700K with 7 games in parallel and got this result which seems again more inline with expectations than your gauntlet results.

Code: Select all

Score of Leorik-2.2 vs blunder-8.0.0: 571 - 347 - 502  [0.579] 1420
...      Leorik-2.2 playing White: 313 - 153 - 244  [0.613] 710
...      Leorik-2.2 playing Black: 258 - 194 - 258  [0.545] 710
...      White vs Black: 507 - 411 - 502  [0.534] 1420
Elo difference: 55.3 +/- 14.6, LOS: 100.0 %, DrawRatio: 35.4 %

[Mike Sherwin]

I posted the game already. I know that I did. But it is not showing so here it is again. But without comment because I lack the energy and will to do it all again.
[pgn][Event "Computer chess game"]
[Site "DESKTOP-HFVHK2B"]
[Date "2022.07.18"]
[Round "?"]
[White "Leorik-2.2"]
[Black "mjshe"]
[Result "0-1"]
[BlackElo "2400"]
[ECO "D47"]
[Opening "Semi-Slav"]
[Time "11:48:23"]
[Variation "Meran, Capablanca, 8...a6"]
[WhiteElo "2000"]
[TimeControl "30+30"]
[Termination "normal"]
[PlyCount "185"]
[WhiteType "human"]
[BlackType "human"]

1. d4 {(d2-d4 d7-d5 Ng1-f3 Ng8-f6 e2-e3 Nb8-c6 c2-c4 e7-e6 Nb1-c3 Nf6-e4
Bc1-d2 Bf8-e7 Bf1-e2 O-O O-O a7-a6 Nc3xe4 d5xe4) +0.16/18 23} d5 2. c4
{(c2-c4 e7-e6 Ng1-f3 Ng8-f6 Nb1-c3 Bf8-b4 Bc1-g5 O-O e2-e3 Nb8-c6 Bf1-d3
d5xc4 Bd3xc4 h7-h6 Bg5xf6 Qd8xf6 O-O) +0.34/17 26} c6 3. Nc3 {(Nb1-c3
Ng8-f6 Ng1-f3 e7-e6 e2-e3 Bf8-d6 Bf1-e2 O-O c4-c5 Bd6-c7 O-O Nb8-d7 Bc1-d2
b7-b5 Qd1-c2 b5-b4 Nc3-a4 Ra8-b8) +0.24/18 27} Nf6 4. Nf3 {(Ng1-f3 e7-e6
e2-e3 Bf8-d6 Bf1-d3 d5xc4 Bd3xc4 b7-b5 Bc4-d3 O-O O-O Bc8-b7 Bc1-d2 b5-b4
Nc3-e4 Nf6xe4 Bd3xe4 Nb8-d7) +0.25/18 22} e6 5. e3 {(e2-e3 Nb8-d7 Bf1-d3
d5xc4 Bd3xc4 b7-b5 Bc4-d3 Bc8-b7 a2-a3 Bf8-d6 O-O O-O e3-e4 e6-e5 Bc1-e3
e5xd4 Be3xd4 Rf8-e8) +0.23/18 19} Nbd7 6. Bd3 {(Bf1-d3 d5xc4 Bd3xc4 b7-b5
Bc4-d3 Bc8-b7 a2-a3 a7-a6 O-O c6-c5 e3-e4 c5xd4 Nf3xd4 Bf8-d6 Bd3-c2 O-O
Nd4xe6) +0.38/17 19} dxc4 7. Bxc4 {(Bd3xc4 b7-b5 Bc4-d3 a7-a6 e3-e4 c6-c5
d4-d5 e6xd5 e4-e5 Nf6-g4 Bc1-g5 Bf8-e7 Bg5xe7 Ke8xe7 Nc3xd5+ Ke7-e8 Ra1-c1
Bc8-b7 Bd3-e4) +0.31/19 25} b5 8. Be2 {(Bc4-e2 b5-b4 Nc3-a4 Bc8-b7 O-O
Bf8-e7 Qd1-c2 O-O Bc1-d2 Qd8-c7 Na4-c5 Nd7xc5 d4xc5 a7-a5 a2-a3 Nf6-d5
a3xb4 a5xb4) +0.08/18 47} a6 9. e4 {(e3-e4 b5-b4 e4-e5 b4xc3 e5xf6 Bf8-b4
O-O Nd7xf6 a2-a3 c3xb2 Bc1xb2 Bb4-d6 Nf3-e5 O-O Ne5xc6 Qd8-b6 Qd1-c2
Bc8-b7) +0.18/18 19} Bb4 10. e5 {(e4-e5 Nf6-d5 Bc1-d2 Bc8-b7 O-O O-O a2-a4
Ra8-c8 Nc3xd5 Bb4xd2 Qd1xd2 e6xd5 a4xb5 c6xb5 Be2-d3 Qd8-e7 Rf1-e1 h7-h6)
+0.59/18 22} Nd5 11. Bd2 {(Bc1-d2 Bc8-b7 O-O O-O a2-a4 b5xa4 Nc3xa4 a6-a5
Ra1-c1 h7-h6 Qd1-c2 Ra8-c8 Na4-c5 Nd7xc5 d4xc5 Bb4xd2 Qc2xd2 a5-a4)
+0.62/18 38} Bb7 12. O-O {(O-O Bb4-e7 Nc3xd5 c6xd5 Qd1-b3 O-O a2-a4 Bb7-c6
a4xb5 a6xb5 Qb3-c2 Ra8xa1 Rf1xa1 Qd8-b6 Bd2-g5 Be7xg5 Nf3xg5) +0.65/17 24}
Bxc3 13. bxc3 {(b2xc3 c6-c5 a2-a4 b5-b4 c3xb4 c5xb4 Qd1-b3 a6-a5 Ra1-c1 O-O
Bd2-g5 Qd8-b6 Be2-b5 h7-h6 Bg5xh6 Nd7xe5 Nf3xe5) +0.98/17 38} c5 14. a4
{(a2-a4 b5-b4 c3xb4 c5xb4 Qd1-b3 a6-a5 Ra1-c1 O-O Bd2-g5 Qd8-b6 Be2-b5
h7-h6 Bg5xh6 Nd7xe5) +0.98/15 66} c4 15. Qb1 {(Qd1-b1 Bb7-c6 Bd2-g5 Qd8-b6
Qb1-c2 O-O Bg5-c1 h7-h6 h2-h3 Bc6-b7 Bc1-a3 Rf8-c8 a4xb5 a6xb5 Ba3-d6
Ra8xa1 Rf1xa1) +0.88/17 16} Bc6 16. Bg5 {(Bd2-g5 Qd8-c7 Qb1-c2 h7-h6 Bg5-c1
b5xa4 Qc2-d2 f7-f6 Be2xc4 f6xe5 Qd2-c2 O-O Bc1-a3 Rf8xf3 g2xf3 Nd5-f4
Qc2-f5) +0.84/17 29} Qb6 17. Qc2 {(Qb1-c2 O-O Bg5-c1 h7-h6 Bc1-a3 Rf8-e8
Qc2-d2 b5xa4 Be2xc4 Bc6-b5 Ra1-b1 Ra8-c8 Bc4xd5 e6xd5 Rf1-e1 Qb6-c7 Rb1-c1
Qc7-b6) +0.68/18 18} h6 18. Bc1 {(Bg5-c1 O-O Bc1-a3 Rf8-e8 Qc2-d2 Ra8-c8
a4xb5 a6xb5 Ba3-d6 b5-b4 Bd6xb4 Nd5xb4 c3xb4 Bc6-d5 Rf1-c1 Kg8-h7 h2-h3
Kh7-g8) +0.70/18 39} O-O 19. Ba3 {(Bc1-a3 Rf8-e8 Qc2-d2 Qb6-d8 Ba3-d6
Nd5-e7 a4xb5 a6xb5 Ra1xa8 Qd8xa8 Qd2-b2 Ne7-f5 Rf1-a1 Qa8-d8 Qb2-c2 Nf5xd6
e5xd6) +0.61/17 16} Rfc8 20. Qd2 {(Qc2-d2 Qb6-d8 Ba3-d6 b5xa4 Be2xc4 Nd7-f6
Rf1-e1 Nd5-b6 Bc4-e2 Nf6-e4 Qd2-b2 Ne4xd6 e5xd6 Bc6-e4 Nf3-d2 Be4-d5
Qb2-a3) +0.51/17 19} Nf8 21. h4 {(h2-h4 Nf8-g6 g2-g3 b5xa4 h4-h5 Ng6-e7
Ba3-c5 Qb6-a5 Rf1-c1 Bc6-b5 Qd2-c2 Qa5-d8 Nf3-d2 Nd5-b6 Be2-f3 Nb6-d5)
+0.42/16 20} Ng6 22. g3 {(g2-g3 Qb6-b7 h4-h5 Ng6-e7 Ba3-d6 Ne7-f5 Bd6-c5
Nd5-e7 Kg1-g2 Bc6-e4 Qd2-c1 Ne7-d5 Rf1-h1 Be4-d3 Be2xd3 c4xd3 a4xb5)
+0.30/17 18} Nge7 23. Bc5 {(Ba3-c5 Qb6-d8 a4-a5 Bc6-b7 Rf1-e1 Rc8xc5 d4xc5
Ne7-c6 Qd2-b2 Nc6xa5 Nf3-d4 Ra8-c8 Qb2-a3 Na5-c6 Be2-f3 Qd8-c7 Bf3xd5)
+0.53/17 21} Qb7 24. Rfb1 {(Rf1-b1 Ne7-f5 g3-g4 Nf5-e7 h4-h5 Qb7-d7 Rb1-e1
b5xa4 Ra1-b1 Bc6-b5 Be2-f1 Rc8xc5 d4xc5 Qd7-c7 Qd2-d4 Ne7-c6) +0.44/16 18}
Nb6 25. Nh2 {(Nf3-h2 Bc6-e4 Rb1-b2 Ne7-d5 a4-a5 Nb6-d7 Bc5-d6 Nd7-f8 Be2-f3
Be4xf3 Nh2xf3 Nd5-b4 Bd6xb4 Qb7xf3 Qd2-e2 Qf3xe2 Rb2xe2 Nf8-d7) +0.54/18
29} Ned5 26. a5 {(a4-a5 Nb6-d7 Bc5-d6 Qb7-a7 Be2-f3 Qa7-b7 Kg1-g2 Rc8-e8
Rb1-e1 Nd5-e7 Bf3xc6 Qb7xc6+ Nh2-f3 Ne7-f5 Bd6-b4 Qc6-c7 Qd2-c2 Ra8-b8)
+0.63/18 19} Nd7 27. Ba3 {(Bc5-a3 Qb7-c7 Ba3-d6 Qc7-a7 Qd2-c2 Rc8-e8 Rb1-e1
Nd5-e7 Be2-g4 Ra8-c8 Bg4-f3 Qa7-a8 Kg1-g2 Ne7-f5 Bd6-b4 Qa8-b7 Bf3xc6)
+0.62/19 22} Qc7 28. Bd6 {(Ba3-d6 Qc7-a7 Qd2-c2 Rc8-e8 Be2-g4 Nd5-e7 Nh2-f1
Ne7-c8 Bd6-b4 Nc8-e7 Nf1-d2 Qa7-b7 Rb1-e1 Bc6-d5) +0.73/20 70} Qd8 29. Re1
{(Rb1-e1 Nd7-f8 Nh2-f1 Nf8-g6 Qd2-c2 Ng6-e7 Nf1-d2 Ne7-f5 Bd6-c5 Nd5-e7
Nd2-e4 Bc6-d5 Be2-f3 Rc8xc5 d4xc5 Ne7-c6 Bf3-g2 Nc6xe5 Ne4-d6) +0.76/19 46}
Nc7 30. Bh5 {(Be2-h5 Nd7-f8 Qd2-c2 Nc7-d5 Bh5-g4 Qd8-d7 Nh2-f3 Nd5-e7
Nf3-d2 Ne7-f5 Bd6-b4 Nf8-g6 Nd2-e4) +0.80/18 35} Ne8 31. Bb4 {(Bd6-b4
Ne8-c7 Qd2-f4 Qd8-e8 Bb4-d6 Nd7-f8 Qf4-d2 Qe8-d8 Qd2-c2 Nc7-d5 Bh5-g4
Qd8-d7 Nh2-f3 Nd5-e7 Nf3-d2 Ne7-f5) +0.80/20 20} Nf8 32. Qc2 {(Qd2-c2
Ne8-c7 Bb4-d6 Nc7-d5 Bh5-g4 Qd8-d7 Nh2-f3 Nd5-e7 Nf3-d2 Ne7-f5 Bd6-b4
Nf8-g6 Nd2-e4 Rc8-d8 Bg4xf5 e6xf5 Ne4-d6 Ng6-e7 Ra1-d1) +0.88/19 20} Rc7
33. Bg4 {(Bh5-g4 Ra8-c8 Bb4-c5 Nf8-d7 Bc5-a3 Nd7-f8 Bg4-f3 Bc6xf3 Nh2xf3
Nf8-g6 Kg1-g2 Ng6-e7 Ba3-b4 Ne7-d5 Bb4-c5 Rc7-b7 Kg2-g1) +0.97/17 16} f5
34. Bh5 {(Bg4-h5 Ra8-c8 Qc2-c1 Rc7-b7 Qc1-a3 Ne8-c7 Bb4-e7 Qd8-d5 Bh5-f3
Qd5-d7 Be7-d6 Bc6xf3 Nh2xf3 Nc7-d5 Qa3-b2 Nf8-g6 Qb2-c2 Qd7-f7) +0.81/18
29} g6 35. Bxf8 {(Bb4xf8 g6xh5 Bf8xh6 Qd8-d5 f2-f3 b5-b4 c3xb4 Qd5xd4+
Bh6-e3 Qd4-d3 Ra1-c1 Qd3xc2 Rc1xc2 Bc6-d5 Be3-c5 Rc7-g7 Kg1-g2 Ra8-d8
Rc2-d2) +1.24/19 20} Kxf8 36. Bxg6 {(Bh5xg6 Rc7-g7 h4-h5 Qd8-g5 Ra1-c1
Kf8-g8 Qc2-b1 Ne8-c7 Qb1-b4 Ra8-d8 Qb4-c5 Bc6-e4 Qc5-b6 Kg8-h8 Rc1-a1
Qg5-d2) +0.78/20 25} Rg7 37. h5 {(h4-h5 Qd8-g5 Ra1-c1 Kf8-g8 Qc2-b1 Ne8-c7
Qb1-b4 f5-f4 Qb4-d6 f4xg3 Qd6xc6 g3xh2+ Kg1-h1 Ra8-f8 Rc1-c2) +0.71/19 34}
Nc7 38. Qc1 {(Qc2-c1 Qd8-g5 Qc1xg5 h6xg5 g3-g4 f5-f4 Nh2-f1 b5-b4 c3xb4
Nc7-b5 Nf1-d2 Nb5xd4 Ra1-c1 Bc6-d5 Bg6-e4 Bd5xe4 Re1xe4 Nd4-b3 Rc1-c2
Nb3xd2) +1.14/20 20} Qg5 39. Qxg5 {(Qc1xg5 h6xg5 g3-g4 f5-f4 Bg6-e4 Bc6xe4
Re1xe4 Nc7-d5 Ra1-c1 Kf8-g8 Nh2-f3 Ra8-d8 Kg1-g2 Kg8-h7 Re4-e1 Kh7-h6
Rc1-c2 Rg7-c7 Re1-b1 Rd8-f8 Rb1-e1) +1.02/21 21} hxg5 40. g4 {(g3-g4 f5-f4
Ra1-c1 Rg7xg6 h5xg6 Kf8-g7 f2-f3 Kg7xg6 Kg1-g2 Ra8-b8 Nh2-f1 Nc7-d5 Rc1-c2
Rb8-h8 Re1-c1 Rh8-f8 Rc1-a1) +1.14/21 32} Rxg6 41. hxg6 {(h5xg6 f5xg4
Re1-e3 Nc7-d5 Re3-g3 Kf8-g7 Nh2xg4 Ra8-h8 Ng4-h2 Kg7xg6 Ra1-a2 Kg6-f5
Ra2-e2 Nd5-f4 Re2-e3 Nf4-d5 Re3-e1 Nd5-f4 f2-f3 Nf4-d5 Re1-c1 Nd5-f4
Rc1-e1) +0.89/23 23} f4 42. f3 {(f2-f3 Ra8-b8 Re1-c1 b5-b4 c3xb4 Rb8xb4
Ra1-b1 Rb4xb1 Rc1xb1 Nc7-b5 Kg1-f2 Kf8-g7 Rb1-d1 c4-c3 Kf2-e2 Kg7xg6 Ke2-d3
Bc6-d5 Rd1-c1 Kg6-f7 Rc1-b1) +0.81/21 20} Kg7 43. Rec1 {(Re1-c1 Ra8-h8
Ra1-a2 Kg7xg6 Ra2-c2 Rh8-h3 Rc2-f2 Nc7-d5 Nh2-f1 Nd5-e3 Nf1xe3 f4xe3 Kg1-g2
Rh3-h4 Rf2-e2 Rh4xg4+ Kg2-h3 Bc6xf3 Re2xe3 Rg4-f4 Kh3-g3 Bf3-d5 Re3-e2)
+0.67/23 18} Rc8 44. Rab1 {(Ra1-b1 Nc7-d5 Nh2-f1 b5-b4 c3xb4 c4-c3 Rb1-a1
Kg7xg6 b4-b5 a6xb5 a5-a6 b5-b4 Rc1-b1 Rc8-a8 Ra1-a2 Bc6-b5 a6-a7 Bb5-d3
Rb1-d1 c3-c2 Rd1-c1 b4-b3 Ra2-a5) +0.18/23 42} Nd5 45. Nf1 {(Nh2-f1 b5-b4
c3xb4 c4-c3 Rb1-a1 Rc8-c7 Ra1-a2 Kg7xg6 Ra2-h2 Bc6-b5 Rh2-h8 Kg6-g7 Rh8-h5
Kg7-g6 Kg1-h2 Nd5xb4 Rh5-h8 c3-c2 d4-d5 e6xd5 e5-e6 Bb5xf1 Rc1xf1) +0.16/23
23} b4 46. cxb4 {(c3xb4 c4-c3 Rb1-a1 Rc8-c7 Ra1-a2 Kg7xg6 Ra2-h2 Bc6-a4
Rh2-a2 Ba4-b5 Ra2-c2 Rc7-c4 Rc2-h2 Nd5xb4 Rh2-h8 c3-c2 Nf1-d2 Rc4xd4 Nd2-b3
Rd4-d1+ Kg1-g2 Bb5-f1+ Kg2-h2 Bf1-b5) -0.26/24 44} c3 47. Ra1 {(Rb1-a1
Rc8-c7 Ra1-a2 Kg7xg6 Ra2-h2 Bc6-b5 Rh2-h8 Nd5xb4 Rh8-g8+ Kg6-f7 Rg8xg5
Nb4-d3 Rc1-c2 Nd3-e1 Rg5-h5 Rc7-c8 Rc2-c1 Ne1xf3+ Kg1-f2 Nf3xd4 Nf1-d2
c3-c2 Nd2-f3) -0.20/23 54} Kxg6 48. Kf2 {(Kg1-f2 Rc8-c7 Ra1-b1 Bc6-b5
Kf2-e1 Rc7-c4 Rb1-b3 Rc4xd4 Ke1-f2 Rd4-c4 Kf2-g2 Bb5-a4 Rb3-b1 c3-c2 Rb1-a1
Rc4xb4 Nf1-d2 Nd5-e3+ Kg2-g1 Ba4-b5 Kg1-f2 Rb4-d4 Nd2-b3 Rd4-d8) -0.46/24
27} Rc7 49. Ke1 {(Kf2-e1 Bc6-b5 Ra1-b1 Rc7-c4 Rb1-b3 Rc4xd4 Ke1-f2 Rd4-c4
Kf2-g1 Bb5-a4 Rb3-a3 Rc4xb4 Ra3-a2 Ba4-b5 Ra2-h2 Rb4-a4 Rh2-h8 Ra4-a2
Rh8-g8+ Kg6-h6) -0.54/24 16} Bb5 50. Ra3 {(Ra1-a3 Rc7-c4 Ra3-b3 Bb5-a4
Rb3-a3 Rc4xb4 Rc1xc3 Nd5xc3 Ra3xc3 Rb4-b1+ Ke1-f2 Rb1-d1 Rc3-c7 Ba4-b5
Nf1-h2 Rd1xd4 Rc7-e7 Rd4-d2+ Kf2-g1) 0.00/28 28} Rc4 51. Rb3 {(Ra3-b3
Bb5-a4 Rb3-a3 Ba4-d7 Ra3-b3 Kg6-h6 Rb3-a3 Bd7-b5 Ra3-b3 Bb5-a4 Rb3-a3
Rc4xb4 Ra3-a2 Kh6-g6 Ra2-h2 Rb4-c4 Rh2-h8 Nd5-b4) 0.00/29 16} Kf7 52. Kf2
{(Ke1-f2 Bb5-c6 Kf2-e1 Kf7-g6 Rb3-a3 Bc6-d7 Ra3-b3 Kg6-h6 Rb3-a3 Bd7-b5
Ra3-b3 Bb5-a4 Rb3-a3 Rc4xb4 Ra3-a2) -0.61/24 17} Ke7 53. Ke1 {(Kf2-e1
Bb5-c6 Rb3-a3 Ke7-f7 Ke1-f2 Kf7-g6 Kf2-e1 Bc6-d7 Ra3-b3 Kg6-h6 Rb3-a3
Bd7-b5 Ra3-b3 Bb5-a4 Rb3-a3 Rc4xb4 Ra3-a2) -0.61/24 18} Kd7 54. Kf2
{(Ke1-f2 Bb5-a4 Rb3-a3 Rc4xb4 Rc1-a1 Ba4-b5 Ra1-c1 Rb4xd4 Ra3-a1 Bb5-a4
Kf2-e2 c3-c2 Ke2-e1 Ba4-b5 Rc1xc2 Bb5xf1 Ra1-c1 Bf1-b5 Rc2-h2 Nd5-e7)
-0.86/23 19} Rxd4 55. Kg2 {(Kf2-g2 Kd7-c6 Rb3xc3+ Nd5xc3 Rc1xc3+ Bb5-c4
Kg2-f2 Kc6-b5 Rc3-c2 Kb5xb4 Nf1-d2) 0.00/27 19} Rd2+ 56. Nxd2 {(Nf1xd2
c3xd2 Rc1-a1 Nd5-e3+ Kg2-g1 d2-d1R+ Ra1xd1+ Ne3xd1 Rb3-b1 Nd1-e3 Kg1-f2
Ne3-c4 Rb1-h1 Nc4xe5 Rh1-h5 Bb5-c6 Rh5xg5 Kd7-d6 Rg5-g8 Bc6xf3) 0.00/29 51}
cxd2 57. Ra1 {(Rc1-a1 Nd5-e3+ Kg2-g1 d2-d1R+ Ra1xd1+ Ne3xd1 Rb3-b1 Nd1-e3
Kg1-f2 Ne3-c4 Rb1-h1 Nc4xe5 Rh1-h5 Bb5-c6 Rh5xg5 Kd7-d6 Rg5-g8 Bc6xf3)
0.00/29 25} Ne3+ 58. Kg1 {(Kg2-g1 d2-d1R+ Ra1xd1+ Ne3xd1 Rb3-b1 Nd1-e3
Kg1-f2 Ne3-c4 Rb1-h1 Nc4xe5 Rh1-h5 Bb5-c6 Rh5xg5 Ne5xf3 Rg5-g7+ Kd7-d6
Rg7-a7 Nf3-e5 Ra7xa6 Ne5-d3+ Kf2-f1 Nd3xb4 Ra6-a7 Bc6-d5 Kf1-f2) -1.07/28
22} d1=Q+ 59. Rxd1+ {(Ra1xd1+ Ne3xd1 Rb3-b1 Nd1-e3 Kg1-f2 Ne3-c4 Rb1-h1
Nc4xe5 Rh1-h7+ Kd7-d6 Rh7-g7 Bb5-c6 Rg7xg5 Ne5xf3 Rg5-g7 Nf3-e5 Kf2-g1
Bc6-e4 Rg7-a7 Be4-d3 Kg1-f2 Ne5xg4+ Kf2-f3 Ng4-e3 Kf3xf4 Ne3-d5+ Kf4-f3
Nd5xb4 Kf3-e3 Bd3-b5 Ra7-g7 Nb4-d5+) -1.52/32 26} Nxd1 60. Rb1 {(Rb3-b1
Nd1-e3 Kg1-f2 Ne3-c4 Rb1-h1 Nc4xe5 Rh1-h7+ Kd7-d6 Rh7-g7 Bb5-c6 Rg7xg5
Ne5xf3 Rg5-g7 Nf3-e5 Kf2-g1 Ne5-d3) 0.00/38 17} Ne3 61. Kf2 {(Kg1-f2 Ne3-c4
Rb1-h1 Nc4xe5 Rh1-h7+ Kd7-d6 Rh7-g7 Bb5-c6 Rg7xg5 Ne5xf3 Rg5-g7 Nf3-e5
Kf2-g1 Ne5-d3) 0.00/40 19} Nc4 62. Rh1 {(Rb1-h1 Nc4xe5 Rh1-h7+ Kd7-d6
Rh7-g7 Bb5-c6 Rg7xg5 Ne5xf3 Rg5-g7 Nf3-e5 Kf2-g1 Bc6-e4 Rg7-a7 Be4-d3
Kg1-f2 Ne5xg4+ Kf2-f3 Ng4-e3 Kf3xf4 Ne3-d5+ Kf4-g5 Nd5xb4 Ra7-f7 Nb4-d5
Rf7-f8 Bd3-e4 Rf8-d8+ Kd6-c5 Rd8-f8) -1.58/29 61} Nxe5 63. Rh7+ {(Rh1-h7+
Kd7-d6 Rh7-g7 Bb5-c6 Rg7xg5 Ne5xf3 Rg5-g7 Nf3-e5 Kf2-g1 Bc6-e4 Rg7-a7
Be4-d3 Kg1-f2 Ne5xg4+ Kf2-f3 Ng4-e3 Kf3xf4 Ne3-d5+ Kf4-g5 Nd5xb4 Ra7-f7
Nb4-c6 Rf7-f3 Bd3-c4 Rf3-a3 Nc6-d4 Kg5-f6 Bc4-b3) -1.71/28 56} Ke8 64. Rg7
{(Rh7-g7 Ne5-f7 Rg7-g8+ Ke8-e7 Rg8-g6 Bb5-c6 Rg6-g8 Ke7-f6 Rg8-f8 Kf6-g7
Rf8-b8 Nf7-e5 Rb8-b6 Kg7-f6 Rb6xa6 Bc6xf3 b4-b5 Bf3-d5 Ra6-a7 Ne5xg4+
Kf2-g1 f4-f3 Ra7-c7 f3-f2+ Kg1-f1 Bd5-c4+ Rc7xc4 Ng4-e3+ Kf1xf2 Ne3xc4)
-1.89/30 94} Nf7 65. Rg6 {(Rg7-g6 Ke8-e7 Kf2-g2 Bb5-c6 Rg6-g8 Ke7-f6 Rg8-f8
Kf6-g7 Rf8-b8 Nf7-e5 Kg2-f2 Bc6-b5 Rb8-b7+ Kg7-f6 Rb7-h7 Bb5-c6 Rh7-h6+
Kf6-f7 Rh6-h7+ Kf7-f6 Rh7-h6+ Kf6-f7 Rh6-h7+ Kf7-f6 Rh7-h6+ Kf6-f7 Rh6-h7+
Kf7-f6 Rh7-h6+ Kf6-f7) -2.04/30 50} Ke7 66. Kg2 {(Kf2-g2 Bb5-c6 Kg2-h3
Bc6xf3 b4-b5 a6xb5 a5-a6 b5-b4 a6-a7 b4-b3 Rg6-g8 Nf7-e5 Rg8-b8 Ne5xg4
Rb8xb3 Ng4-e3 Kh3-h2 g5-g4 Kh2-g1 e6-e5 Rb3-b8 Bf3-g2) 0.00/36 24} Bd3 67.
Rg8 {(Rg6-g8 Ke7-f6 Rg8-c8 Nf7-e5 Rc8-f8+ Kf6-g7 Rf8-e8 Bd3-c4 Re8-b8
Bc4-e2 Kg2-g1 Kg7-f7 Rb8-a8 Be2-b5 Kg1-g2 Ne5-c6 Ra8-h8 Nc6xb4 Rh8-h5
Kf7-g6 Rh5-h1 Nb4-c6 Rh1-a1) -2.14/27 16} Kf6 68. Rc8 {(Rg8-c8 Nf7-e5
Rc8-f8+ Kf6-g7 Rf8-e8 Bd3-c4 Re8-b8 Bc4-e2 Kg2-g1 Kg7-f7 Rb8-a8 Be2-b5
Kg1-g2 Ne5-c6 Ra8-h8 Nc6xb4 Rh8-h5 Kf7-g6 Rh5-h1 Nb4-c6 Rh1-a1) -2.14/30
22} Ne5 69. Rf8+ {(Rc8-f8+ Kf6-g7 Rf8-e8 Bd3-c4 Re8-b8 Bc4-e2 Kg2-g1 Kg7-f7
Rb8-a8 Be2-b5 Kg1-g2 Kf7-g7 Ra8-f8 Kg7xf8) -2.14/28 85} Kg7 70. Rc8
{(Rf8-c8 Bd3-c4 Kg2-f2 Bc4-b5 Rc8-c3 Ne5-d3+ Kf2-g1 Nd3xb4 Kg1-f2 Nb4-d3+
Kf2-g1 Kg7-g6 Rc3-a3 Nd3-b4 Ra3-c3 Nb4-c6 Rc3-a3 Kg6-f6 Kg1-f2 Nc6-e5
Kf2-e1 Bb5-c6 Ke1-e2 Bc6xf3+ Ra3xf3 Ne5xf3 Ke2xf3 Kf6-e5 Kf3-e2) -2.29/29
21} Be2 71. Rc3 {(Rc8-c3 Kg7-f6 Rc3-b3 Be2-c4 Rb3-b2 Ne5-d3 Rb2-b1 Bc4-a2
Rb1-h1 Nd3xb4 Rh1-h6+ Kf6-g7 Rh6-h5 Kg7-g6 Rh5-h8) 0.00/29 22} Kf7 72. Kf2
{(Kg2-f2 Be2-c4 Rc3-a3 Kf7-f6 Ra3-a1 Ne5-d3+ Kf2-g1 Bc4-d5 b4-b5 a6xb5
Ra1-b1 Nd3-e5 Rb1xb5 Ne5xf3+ Kg1-f2 Bd5-c4 Rb5-b1 Nf3-e5 Rb1-g1 f4-f3
Rg1-a1 Bc4-e2 Ra1-a4 Be2-a6 Ra4-e4 Ba6-c4 Re4xe5 Kf6xe5) -2.28/28 16} Bc4
73. Ra3 {(Rc3-a3 Kf7-f6 Ra3-a1 Ne5-d3+ Kf2-g1 Bc4-d5 b4-b5 a6xb5 Ra1-b1
Nd3-e5 Rb1xb5 Ne5xf3+ Kg1-f2 Bd5-c4 Rb5-b1 Nf3-e5 Rb1-g1) -2.28/26 40} Ke7
74. Ra1 {(Ra3-a1 Ke7-d6 Kf2-g2 Bc4-d5 b4-b5 Bd5xf3+ Kg2-f1 a6xb5 a5-a6
Ne5xg4 a6-a7 Ng4-e3+ Kf1-g1 Ne3-c4 Ra1-a6+ Kd6-d7 a7-a8Q Bf3xa8 Ra6-a7+
Kd7-d6 Ra7xa8 g5-g4 Ra8-b8 Kd6-c6 Rb8-c8+ Kc6-d5) -2.96/26 27} Kd6 75. Kg2
{(Kf2-g2 Bc4-d5 b4-b5 a6xb5 a5-a6 Kd6-c7 a6-a7 Bd5-a8 Kg2-f2 Ne5xf3 Ra1-a6
Kc7-b7 Ra6xe6 Kb7xa7 Re6-g6 Ba8-e4 Rg6-e6 Be4-b7 Re6-e7 Nf3-h2 Re7-g7
Nh2xg4+ Kf2-e1 f4-f3 Rg7xg5) -3.49/25 25} Kc6 76. Rh1 {(Ra1-h1 Bc4-d5
Rh1-h8 Bd5xf3+ Kg2-g1 Ne5xg4 Rh8-c8+ Kc6-b5 Rc8-b8+ Kb5-a4 b4-b5 Ka4xa5
b5xa6 Ka5xa6 Rb8-g8 Bf3-e2 Rg8xg5 f4-f3 Rg5xg4 f3-f2+ Kg1xf2 Be2xg4 Kf2-e3
Ka6-b6 Ke3-d4 Bg4-f5) -3.58/26 16} Bd5 77. Rh8 {(Rh1-h8 Bd5xf3+ Kg2-g1
Kc6-b5 Rh8-b8+ Kb5-a4 Rb8-b6 Ne5xg4 Rb6xa6 Bf3-e2 Ra6-a8 f4-f3 Ra8-f8
f3-f2+ Rf8xf2 Ng4xf2 Kg1xf2 Be2-c4 Kf2-f3 Ka4xb4 Kf3-g4 Kb4xa5 Kg4xg5
Ka5-b6 Kg5-f6 Kb6-c5) -3.75/26 31} Nxf3 78. Rg8 {(Rh8-g8 Kc6-b5 Rg8-b8+
Kb5-a4 b4-b5 Nf3-d4+ Kg2-f1 Bd5-c4+ Kf1-f2 Nd4xb5 Kf2-e1 Bc4-d5 Rb8-g8
Nb5-d4 Ke1-d1 Ka4xa5 Rg8xg5 f4-f3 Kd1-e1 Ka5-b4 Ke1-f2 a6-a5 Rg5-g7 a5-a4
Kf2-e3 Kb4-c5) -4.04/26 33} Kb5 79. Rb8+ {(Rg8-b8+ Kb5-a4 b4-b5 Nf3-d4+
Kg2-f1 Bd5-c4+ Kf1-g2 Bc4xb5 Rb8-g8 Bb5-c6+ Kg2-f1 Nd4-f3 Rg8-c8 Bc6-d5
Kf1-e2 Nf3-h2 Rc8-g8 f4-f3+ Ke2-f2 Nh2xg4+ Kf2-g3 Ng4-e3 Kg3-f2 Ne3-f5
Rg8xg5 Ka4xa5 Rg5-g8 Ka5-b4) -4.34/28 29} Ka4 80. b5 {(b4-b5 Nf3-d4+ Kg2-f1
Bd5-c4+ Kf1-g2 Bc4xb5 Rb8-g8 Bb5-c6+ Kg2-f1 Nd4-f3 Rg8-c8 Bc6-d5 Kf1-e2
Ka4xa5 Ke2-d1 Ka5-b6 Kd1-c2 a6-a5 Kc2-c3 Bd5-c6 Rc8-h8 a5-a4 Kc3-b4 Nf3-e5
Rh8-g8 Ne5-d3+ Kb4-c4) -4.56/27 16} axb5 81. a6 {(a5-a6 Nf3-e5+ Kg2-f2
Ne5-c6 Rb8-g8 Ka4-a5 a6-a7 Nc6xa7 Rg8xg5 b5-b4 Rg5-e5 b4-b3 Re5-e1 Na7-c6
g4-g5 Nc6-e7 Re1-d1 Ka5-b6 Rd1-g1 Ne7-g6 Rg1-d1 Kb6-a5 Rd1-g1) -3.99/27 20}
b4 82. a7 {(a6-a7 Nf3-e5+ Kg2-f1 b4-b3 Kf1-e1 Ne5-c4 Ke1-e2 b3-b2 Ke2-d3
f4-f3 a7-a8Q+ Bd5xa8 Rb8xa8+ Ka4-b4 Kd3-c2) 0.00/33 20} Nd4+ 83. Kf1
{(Kg2-f1 b4-b3 Kf1-e1 f4-f3 a7-a8Q+ Bd5xa8 Rb8xa8+ Ka4-b4 Ke1-d2 f3-f2
Ra8-a1 Nd4-b5 Ra1-f1 Nb5-c3 Kd2-c1 Nc3-e4 Kc1-b2 Ne4-c5 Kb2-c1 Kb4-c3
Kc1-d1 Nc5-d3 Kd1-e2 b3-b2 Rf1xf2) -3.27/25 17} b3 84. Ke1 {(Kf1-e1 f4-f3
a7-a8Q+ Bd5xa8 Rb8xa8+ Ka4-b4 Ke1-d2 f3-f2 Ra8-a1 Nd4-b5 Ra1-f1 Nb5-c3
Kd2-c1 Nc3-e4 Kc1-b2 Ne4-c5 Kb2-c1 Kb4-c3 Kc1-d1 Nc5-e4 Kd1-e2 Ne4-g3+
Ke2xf2 Ng3xf1 Kf2xf1) -3.27/25 27} Nb5 85. a8=Q+ {(a7-a8Q+ Bd5xa8 Rb8xa8+
Ka4-b4 Ke1-d2 e6-e5 Kd2-c1 e5-e4 Kc1-b2 e4-e3 Ra8-e8 Nb5-d4 Re8-b8+ Kb4-c5
Rb8-c8+ Kc5-b6 Kb2-c3 f4-f3 Kc3xd4 f3-f2 Rc8-b8+ Kb6-c6 Rb8xb3 e3-e2
Rb3-c3+ Kc6-d6 Rc3-c5 f2-f1Q Rc5-d5+ Kd6-e6) -6.33/30 49} Bxa8 86. Rxa8+
{(Rb8xa8+ Ka4-b4 Ke1-d2 e6-e5 Ra8-e8 f4-f3 Re8-e7 Nb5-d6 Re7-d7 b3-b2
Kd2-c2 f3-f2 Rd7xd6 f2-f1Q Rd6-b6+ Kb4-c4 Rb6xb2 Qf1-g2+ Kc2-c1 Qg2-g1+
Kc1-c2 Qg1xg4 Rb2-b8 Qg4-e2+ Kc2-c1 Qe2-e3+ Kc1-c2 g5-g4 Rb8-d8) -7.05/29
29} Kb4 87. Kd2 {(Ke1-d2 e6-e5 Ra8-e8 f4-f3 Re8xe5 f3-f2 Kd2-e2 b3-b2
Re5-e4+ Kb4-b3 Ke2xf2 b2-b1Q Re4-e1 Qb1-b2+ Re1-e2 Qb2-d4+ Kf2-g2 Qd4xg4+
Kg2-f1 Nb5-d4 Re2-e7 Qg4-f3+ Kf1-e1 g5-g4 Ke1-d2 Qf3-c3+ Kd2-d1 Qc3-c2+
Kd1-e1 g4-g3) -9.86/30 85} e5 88. Re8 {(Ra8-e8 f4-f3 Re8xe5 f3-f2 Kd2-e2
b3-b2 Re5-e4+ Kb4-b3 Ke2xf2 b2-b1Q Re4-e1 Qb1-b2+ Re1-e2 Qb2-d4+ Kf2-g2
Qd4xg4+) 0.00/37 37} f3 89. Rxe5 {(Re8xe5 f3-f2 Kd2-e2 b3-b2 Re5-e4+ Kb4-b3
Ke2xf2 b2-b1Q Re4-e1 Qb1-b2+ Re1-e2 Qb2-d4+ Kf2-g2 Qd4xg4+) -9.86/26 18} f2
90. Ke2 {(Kd2-e2 b3-b2 Re5-e4+ Kb4-b3 Ke2xf2 b2-b1Q Re4-e1 Qb1-b2+ Re1-e2
Qb2-d4+ Kf2-g2 Qd4xg4+ Kg2-f1 Nb5-d4 Re2-f2 Kb3-c3 Rf2-f8 Qg4-e2+ Kf1-g1
Nd4-f3+ Rf8xf3+ Qe2xf3 Kg1-h2 Qf3-f4+ Kh2-h3 Qf4-e4) -11.62/26 33} b2 91.
Re4+ {(Re5-e4+ Kb4-c3 Ke2xf2 b2-b1Q Re4-e1 Qb1-c2+ Re1-e2 Qc2-d1 Re2-e7
Qd1-h1 Re7-e3+ Kc3-c4 Re3-e8 Qh1-h2+ Kf2-f1 Nb5-d4 Re8-f8 Qh2-e2+ Kf1-g1
Nd4-f3+ Rf8xf3 Qe2xf3 Kg1-h2) -11.69/25 33} Kb3 92. Kxf2 {(Ke2xf2 b2-b1Q
Re4-e1 Qb1-b2+ Re1-e2 Qb2-d4+ Kf2-f1 Qd4xg4 Re2-g2 Qg4-f3+ Kf1-g1 Nb5-c3
Kg1-h2 Nc3-e2 Rg2xe2 Qf3xe2+ Kh2-g3 Kb3-c2 Kg3-h3 g5-g4+ Kh3-h4 Qe2-f3
Kh4-h5 g4-g3+ Kh5-g6 g3-g2) -12.49/26 17} b1=Q 93. Re1 {(Re4-e1 Qb1-b2+
Re1-e2 Qb2-d4+ Kf2-f1 Qd4xg4 Re2-g2 Qg4-f3+ Kf1-g1 Nb5-c3 Kg1-h2 Nc3-e2
Rg2xe2 Qf3xe2+ Kh2-g3 Kb3-c2 Kg3-h3 g5-g4+ Kh3-h4) -12.49/24 45 White
resigns} *
[/pgn]

[lithander]

I posted the game already. I know that I did. But it is not showing so here it is again. But without comment because I lack the energy and will to do it all again.

Wow, you did it again! That's amazing. I have no idea how you know when to trade a rook for a bishop but apparently it was exactly what was needed in that situation. Pitty you lost the extensive commentary... I would have loved to read that. Did you win first try?

[Mike Sherwin]

I posted the game already. I know that I did. But it is not showing so here it is again. But without comment because I lack the energy and will to do it all again.

Wow, you did it again! That's amazing. I have no idea how you know when to trade a rook for a bishop but apparently it was exactly what was needed in that situation. Pitty you lost the extensive commentary... I would have loved to read that. Did you win first try?

I did not win first try this time because I was just not warmed up and able to focus at first. It was the second try. I sacked the pawn and the exchange because I saw I could make the rest of Leorik's pieces quite useless.