Nightmare II (Test-Set)

[peter]

Hi Walter!
Great collection of yours once again!
Did you realize the discussion about the position you gave as 07?

http://www.talkchess.com/forum/viewtopi ... 6ab5745c0b

As you can see, I did my very best to defend it.

Here's my latest .pgn dealing with it:

http://www.talkchess.com/forum/viewtopi ... 99&t=61198

Here is my so far best tactic- setting of komodo 10.1:

Löse: C:\Users\Dr. Martan\Documents\ChessBase\Database\Work\Nightmare2.cbh
Maximale Lösungszeit = 60s.

1. Nightmare II-01 - Koenigsangr, Nightmare 2 - (W.Eigenmann) Gelöst in 5.49s/17; Gelöst: 1
2. Nightmare II-02 - Springerumw, Nightmare 2 - (W.Eigenmann) > 60s.
3. Nightmare II-03 - Initiative, Nightmare 2 - (W.Eigenmann) > 60s.
4. Nightmare II-04 - Springeropf, Nightmare 2 - (W.Eigenmann) > 60s.
5. Nightmare II-05 - Endspiel T&, Nightmare 2 - (W.Eigenmann) > 60s.
6. Nightmare II-06 - Endspiel D, Nightmare 2 - (W.Eigenmann) > 60s.
7. Nightmare II-07 - Festung, Nightmare 2 - (W.Eigenmann) > 60s.
8. Nightmare II-08 - Offene Lini, Nightmare 2 - (W.Eigenmann) > 60s.
9. Nightmare II-09 - Patt, Nightmare 2 - (W.Eigenmann) > 60s.
10. Nightmare II-10 - Endspiel T&, Nightmare 2 - (W.Eigenmann) > 60s.
11. Nightmare II-11 - Koenigsangr, Nightmare 2 - (W.Eigenmann) > 60s.
12. Nightmare II-12 - Endspiel D&, Nightmare 2 - (W.Eigenmann) > 60s.
13. Nightmare II-13 - Koenigsangr, Nightmare 2 - (W.Eigenmann) > 60s.
14. Nightmare II-14 - Damenopfer, Nightmare 2 - (W.Eigenmann) Gelöst in 1.06s/14; Gelöst: 2
15. Nightmare II-15 - Endspiel L, Nightmare 2 - (W.Eigenmann) > 60s.
16. Nightmare II-16 - Endspiel T&, Nightmare 2 - (W.Eigenmann) Gelöst in 10.02s/18; Gelöst: 3
17. Nightmare II-17 - Endspiel T&, Nightmare 2 - (W.Eigenmann) > 60s.
18. Nightmare II-18 - Koenigsangr, Nightmare 2 - (W.Eigenmann) Gelöst in 2.39s/17; Gelöst: 4
19. Nightmare II-19 - Springeropf, Nightmare 2 - (W.Eigenmann) > 60s.
20. Nightmare II-20 - Starke Feld, Nightmare 2 - (W.Eigenmann) > 60s.
21. Nightmare II-21 - Endspiel T, Nightmare 2 - (W.Eigenmann) > 60s.
22. Nightmare II-22 - Bauernopfer, Nightmare 2 - (W.Eigenmann) > 60s.
23. Nightmare II-23 - Zugzwang, Nightmare 2 - (W.Eigenmann) > 60s.
24. Nightmare II-24 - Endspiel T&, Nightmare 2 - (W.Eigenmann) > 60s.
25. Nightmare II-25 - Linienoeffn, Nightmare 2 - (W.Eigenmann) > 60s.
26. Nightmare II-26 - Raeumung, Nightmare 2 - (W.Eigenmann) Gelöst in 27.85s/22; Gelöst: 5
27. Nightmare II-27 - Initiative, Nightmare 2 - (W.Eigenmann) Gelöst in 2.40s/17; Gelöst: 6
28. Nightmare II-28 - Endspiel D&, Nightmare 2 - (W.Eigenmann) > 60s.
29. Nightmare II-29 - Endspiel T&, Nightmare 2 - (W.Eigenmann) > 60s.
30. Nightmare II-30 - Koenigsangr, Nightmare 2 - (W.Eigenmann) Gelöst in 13.15s/19; Gelöst: 7

Ergebnis: 7 aus 30 = 23.3%. Durchschnittszeit = 8.90s / 17.71


Thank you very much for that fine piece of art, which it is to me, to put so many very hard test positions together

[peter]

I recognize some positions from my hard set

I ran SF-MF on 6*4GHz, 5 min per position : 11/30 !

Thanks for that too, Vincent.
So I'll rather restart my run with MF, having given only 1' at first try obvioulsy was to little time per position

[peter]

Hi Andrew!

the problem is that there are 2 solutions, the one that Walter gave 1.Rg1! and what the engines like to play which is 1.Rh3!

I'll show you what my computer thinks after MAKING both moves and thinking about it for 2 hours on both moves:

That's the latest asm-Fish with LPs after a good half hour at 24 threads with 32G hash after Forward- Backward of two main lines made with the same engine 10 moves long, then restarted with already full hash in 2MV- mode.
Depth 42:

30: Nightmare II-30 - Koenigsangr, Nightmare 2 - (W.Eigenmann)
r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - 0 1

Analysis by pedantFishW_2016-08-25_popcnt:

1. +- (2.58): 1.Tg1 f5 2.Txg7+ Kxg7 3.Th3 Sg6 4.Lxf5 exf5 5.Dh7+ Kf8 6.e6 Ld6 7.Dxg6 Le5 8.Th5 Lg7 9.Sd4 Lxd4 10.Txf5+ Ke7 11.Tf7+ Kd6 12.Txc7 Kxc7 13.Df7+ Kd6 14.Dd7+ Ke5 15.Dg7+ Kxe6 16.Dxd4 Kf5 17.Dd3+ Kf6 18.Df3 Te1+ 19.Kd2 Tae8 20.Dxf4+ Kg6 21.Dc7 T8e7 22.Dxb6+ Kf7 23.Dd4 Kf8 24.b3 T1e5 25.h4 T7e6 26.Db4+ Te7 27.Df4+ Kg7 28.b4 Kg6 29.Kc1 Kh7 30.Kb2 Kg8 31.Dg3+ Kf8 32.Df2+ Kg7 33.Db6 Kh7 34.Dd4 Kg8 35.Kc1 Kf8 36.Df4+ Kg8 37.b5 axb5 38.axb5 d4 39.Dxd4 Kh7
2. +- (1.84): 1.Th3 f5 2.Dh8+ Kf7 3.Dh5+ Kg8 4.Te1 f3 5.Dh8+ Kf7 6.Tg3 g6 7.Teg1 Tec8 8.Sd4 f2 9.T1g2 Dc5 10.Txg6 Sxg6 11.Dh7+ Ke8 12.Dxg6+ Kd7 13.Dxe6+ Kc7 14.Tg7 Te8 15.Sxf5 Kd8 16.Sxe7 Txe7 17.Df6 De3+ 18.Kb1 Dxe5 19.Dxb6+ Tc7 20.Tf7 d4 21.Txc7 f1T+ 22.Lxf1 Dxc7 23.Dxd4+ Dd7 24.Df4 Tc8 25.Lxa6 Lxa6 26.Df6+ Ke8 27.Dxa6 Tc5 28.Dg6+ Df7 29.Dd3 Dd7 30.De4+ De7 31.Dg4 De5 32.Se4 Tc7 33.b4 Td7 34.Sc5 Tg7 35.Dc8+ Kf7 36.Ka2 Tg1 37.Dd7+ Kg8 38.De6+ Dxe6+ 39.Sxe6 Tg2

[Vinvin]

3 runs with Stockfish_160827 on 6*4GHz, 5 min per position : 7/30, 8/30 and 7/30.
10 different key moves found !

Code: Select all

Analyzing engine: Stockfish_160827_x64_modern
   Use seconds per move      : 300 Seconds per move
   Analysis Lines            : Minimum search depth=12
   Activate abort analysis   : True. Minimal analysis depth 24. Abort, if the correct move is held 3 additional ply

Code: Select all

 1) Qe2-h5         Qe2-h5  231 Sec         Qe2-h5 166 Sec         Qe2-h5 159 Sec   
 2) c7-c8N         Kf3-g2                  Kf3-g2                 Kf3-g2 
 3) Ne2-f4         Be3-c5                  Be3-a7                 Be3-a7 
 4) Ng4xh6         Ng4xh6  109 Sec         Ng4xh6 5 Sec           Ng4xh6 4 Sec     
 5) Rb2xb7         Rb2xb7  7 Sec           Rb2xb7 9 Sec           Rb2xb7 8 Sec     
 6) Qc6xd6         Qc6xd6  193 Sec         Qc6xd6 144 Sec         Qc6-c4 
 7) .. Qh5-f5      g4xh3                   g4xh3                  g4xh3  
 8) h2-h4          Ba4-b3                  Ba4-b3                 Ba4-b3 
 9) a5-a6          g6-g7                   g6-g7                  a5-a6  128 Sec   
10) Nf7-d6         Nf7-h6                  Rg3-e3                 Rg3-f3 
11) .. Rh6xh2      a7-a6                   a7-a6                  a7-a6  
12) Qc7-d8         Rb6-f6                  Rb6-f6                 Rb6-f6 
13) .. Rd6-f6      Rd6-d7                  Rd6-d7                 Rd6-d7 
14) Qe2xe8         Qe2xe8  173 Sec         Bd4xf6                 Bd4xf6 
15) f3-f4          Ke8-d7                  Ke8-d7                 Ke8-d7 
16) Ng5-e6         Ng5-e6  122 Sec         Ng5-e6 107 Sec         Ng5-e6 80 Sec    
17) Nf4-d3         h4xg5                   h4xg5                  h4xg5  
18) Bd4-f6         Qh5-h6                  Qh5-h6                 Qh5-h6 
19) Ne7-g6         Qg2-e4                  Qg2-e4                 Qg2-e4 
20) .. Kg8-g7      e4xd3                   e4xd3                  e4xd3  
21) .. Rb8xb3      Ke7-e6                  Ke7-e6                 Ra6-a7 
22) f5-f6          Kg1-h1                  Kg1-h1                 Kg1-h1 
23) Nc7-a8         Rc2-f2                  Rc2-f2                 Rc2-f2 
24) a7-a8Q         Re7-e1                  Bc2-b3                 a7-a8Q 77 Sec    
25) g2-g4          c2-c4                   f2-f3                  c2-c4  
26) .. e4-e3       e4-e3   98 Sec          e4-e3  146 Sec         e4-e3  60 Sec    
27) h2-h4          e7xf8Q                  e7xf8Q                 e7xf8R 
28) f2-f4          Na8-c7                  Na8-c7                 Na8-c7 
29) Ka4-a3         Ka4-a3  9 Sec           Ka4-a3 14 Sec          Ka4-a3 14 Sec    
30) Rd1-g1         Rf3-h3                  Rf3-h3                 Rf3-h3

The 10 solutions found at least one time :

Code: Select all

 1) Qe2-h5         Qe2-h5  231 Sec         Qe2-h5 166 Sec         Qe2-h5 159 Sec  
 4) Ng4xh6         Ng4xh6  109 Sec         Ng4xh6 5 Sec           Ng4xh6 4 Sec    
 5) Rb2xb7         Rb2xb7  7 Sec           Rb2xb7 9 Sec           Rb2xb7 8 Sec    
 6) Qc6xd6         Qc6xd6  193 Sec         Qc6xd6 144 Sec         Qc6-c4 
 9) a5-a6          g6-g7                   g6-g7                  a5-a6  128 Sec  
14) Qe2xe8         Qe2xe8  173 Sec         Bd4xf6                 Bd4xf6 
16) Ng5-e6         Ng5-e6  122 Sec         Ng5-e6 107 Sec         Ng5-e6 80 Sec   
24) a7-a8Q         Re7-e1                  Bc2-b3                 a7-a8Q 77 Sec   
26) .. e4-e3       e4-e3   98 Sec          e4-e3  146 Sec         e4-e3  60 Sec   
29) Ka4-a3         Ka4-a3  9 Sec           Ka4-a3 14 Sec          Ka4-a3 14 Sec 

[Glarean]

Hi Walter!
Great collection of yours once again!
Did you realize the discussion about the position you gave as 07?

No - thx.
Yeah, Qf5 is the only move (Festung), all others are losing.
Do you know the source (or composer?) of this position (Nightmare-II-7) ?

Here is my so far best tactic- setting of komodo 10.1:
Ergebnis: 7 aus 30 = 23.3%. Durchschnittszeit = 8.90s / 17.71

Hm... only 2 solutions here with default komodo 10.1 (3 GHz - 4Cores - 5 min/pos -- #04 & #24)
Your strong hardware? Special setting?

Thank you very much for that fine piece of art, which it is to me, to put so many very hard test positions together

Thx for your feedback

Walter

[peter]

Yeah, Qf5 is the only move (Festung), all others are losing.
Do you know the source (or composer?) of this position (Nightmare-II-7) ?

Sorry but no, Walter. I asked Dann, who brought it here, too, looks like he doesn't know so neither.

Here is my so far best tactic- setting of komodo 10.1:
Ergebnis: 7 aus 30 = 23.3%. Durchschnittszeit = 8.90s / 17.71

Hm... only 2 solutions here with default komodo 10.1 (3 GHz - 4Cores - 5 min/pos -- #04 & #24)
Your strong hardware? Special setting?

Guess it might be previously the setting, if I succeed to tune it more successfully especially for your collection, I'll be back.


P.S. 1 minute was too little time too for these positions probably, even at 24 threads

[acase]

Hi Andrew!

the problem is that there are 2 solutions, the one that Walter gave 1.Rg1! and what the engines like to play which is 1.Rh3!

I'll show you what my computer thinks after MAKING both moves and thinking about it for 2 hours on both moves:

That's the latest asm-Fish with LPs after a good half hour at 24 threads with 32G hash after Forward- Backward of two main lines made with the same engine 10 moves long, then restarted with already full hash in 2MV- mode.
Depth 42:

30: Nightmare II-30 - Koenigsangr, Nightmare 2 - (W.Eigenmann)
r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - 0 1

Analysis by pedantFishW_2016-08-25_popcnt:

1. +- (2.58): 1.Tg1 f5 2.Txg7+ Kxg7 3.Th3 Sg6 4.Lxf5 exf5 5.Dh7+ Kf8 6.e6 Ld6 7.Dxg6 Le5 8.Th5 Lg7 9.Sd4 Lxd4 10.Txf5+ Ke7 11.Tf7+ Kd6 12.Txc7 Kxc7 13.Df7+ Kd6 14.Dd7+ Ke5 15.Dg7+ Kxe6 16.Dxd4 Kf5 17.Dd3+ Kf6 18.Df3 Te1+ 19.Kd2 Tae8 20.Dxf4+ Kg6 21.Dc7 T8e7 22.Dxb6+ Kf7 23.Dd4 Kf8 24.b3 T1e5 25.h4 T7e6 26.Db4+ Te7 27.Df4+ Kg7 28.b4 Kg6 29.Kc1 Kh7 30.Kb2 Kg8 31.Dg3+ Kf8 32.Df2+ Kg7 33.Db6 Kh7 34.Dd4 Kg8 35.Kc1 Kf8 36.Df4+ Kg8 37.b5 axb5 38.axb5 d4 39.Dxd4 Kh7
2. +- (1.84): 1.Th3 f5 2.Dh8+ Kf7 3.Dh5+ Kg8 4.Te1 f3 5.Dh8+ Kf7 6.Tg3 g6 7.Teg1 Tec8 8.Sd4 f2 9.T1g2 Dc5 10.Txg6 Sxg6 11.Dh7+ Ke8 12.Dxg6+ Kd7 13.Dxe6+ Kc7 14.Tg7 Te8 15.Sxf5 Kd8 16.Sxe7 Txe7 17.Df6 De3+ 18.Kb1 Dxe5 19.Dxb6+ Tc7 20.Tf7 d4 21.Txc7 f1T+ 22.Lxf1 Dxc7 23.Dxd4+ Dd7 24.Df4 Tc8 25.Lxa6 Lxa6 26.Df6+ Ke8 27.Dxa6 Tc5 28.Dg6+ Df7 29.Dd3 Dd7 30.De4+ De7 31.Dg4 De5 32.Se4 Tc7 33.b4 Td7 34.Sc5 Tg7 35.Dc8+ Kf7 36.Ka2 Tg1 37.Dd7+ Kg8 38.De6+ Dxe6+ 39.Sxe6 Tg2

Hello Peter!


I think there are improvements for white in the line given by your analisys for the 1.Rh3! line, or if you will 1.Tf3!



Ok here is your line up to move 9 with my suggested improvement(s)



1. Rh3 f5 2. Qh8+ Kf7 3. Qh5+ Kg8 4. Re1 f3 5. Qh8+ Kf7 6. Rg3 g6 7. Reg1
Rec8 8. Nd4 f2

[d]r1r2n1Q/1bq1bk2/pp2p1p1/3pPp2/P2N4/2NB2R1/1PP2p1P/2K3R1 w - - 0 9


9. R1g2? what if we tried 9.Rxg6! instead here and then follows 9...Ke8 10.Rf1! and not 10.Rg1g2


and here is the position after my proposed improvements.



[d]r1r1kn1Q/1bq1b3/pp2p1R1/3pPp2/P2N4/2NB4/1PP2p1P/2K2R2 b - - 2 10



Also it looks like there are few wasted moves here starting with white's second move (2.Qh8+) instead the more efficient and immediate 2.Re1 should be played, as the 2.Qh8+ line leads to the exact same position but 2 moves later (wasting precious plies! )


for example the line in the () here arrives at the exact same position without the unnecessary checks -----> 1. Rh3 f5 2. Qh8+ (2. Re1 f3 3. Qh8+ Kf7 4. Rg3 g6 5. Reg1) 2. .. Kf7 3.Qh5+ Kg8 4. Re1 f3 5. Qh8+ Kf7 6. Rg3 g6 7. Reg1 Rec8 8. Nd4 f2 9. Rxg6 Ke8
10. Rf1 *

[peter]

[quote="acase"]
I think there are improvements for white in the line given by your analisys for the 1.Rh3! line, or if you will 1.Tf3!
[\quote]


These are not my analysis lines, Andrew, these are just SF's output- lines after Forward- Backward and follow- up stand alone- computing in 2 MV mode.
Here's the line, I did let SF go backward after having forwarded it:

r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - 0 1

1. Rh3 f5 2. Qh8+ Kf7 3. Qh5+ Kg8 4. Re1 f3 5. Qh8+ Kf7 6. Rg3 g6 7. Reg1 Rec8 8. Nd4 f2 9. R1g2 Qc5 10. Rxg6

Of course, that's won for White too, as for that 1.Rg1 isn't a single game- winning move, yet I think it to be the best one.

Let's discuss, if you want to, a better line of yours after 1.Rh3 compared to the one up there and to the one, SF gives in it's output after 1.Rg1 but not further then to 10th move too, cause till there it's the same I used for Forward- Backward as it is in output afterwards:

r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - 0 1

1. Rg1 f5 2. Rxg7+ Kxg7 3. Rh3 Ng6 4. Bxf5 exf5 5. Qh7+ Kf8 6. e6 Bd6 7. Qxg6 Be5 8. Rh5 Bg7 9. Nd4 Bxd4 10. Rxf5+

Of course one can find alternative moves for both lines, but let's have a look at the end- positions of such two lines seperately, I think 1.Rg1 yet has the edge ofer 1.Rh3.

Walter already said, he'd have a second look at this one, maybe engine is asked too much to discriminate these two moves exactly enough at short time computing.
I just wanted to show that as for my trials they do better after Forward- Backward of just some more moves then the first one only, so I think they could do better before too.

[acase]

I think there are improvements for white in the line given by your analisys for the 1.Rh3! line, or if you will 1.Tf3!
[\quote]


These are not my analysis lines, Andrew, these are just SF's output- lines after Forward- Backward and follow- up stand alone- computing in 2 MV mode.
Here's the line, I did let SF go backward after having forwarded it:

r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - 0 1

1. Rh3 f5 2. Qh8+ Kf7 3. Qh5+ Kg8 4. Re1 f3 5. Qh8+ Kf7 6. Rg3 g6 7. Reg1 Rec8 8. Nd4 f2 9. R1g2 Qc5 10. Rxg6

Of course, that's won for White too, as for that 1.Rg1 isn't a single game- winning move, yet I think it to be the best one.

Let's discuss, if you want to, a better line of yours after 1.Rh3 compared to the one up there and to the one, SF gives in it's output after 1.Rg1 but not further then to 10th move too, cause till there it's the same I used for Forward- Backward as it is in output afterwards:

r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - 0 1

1. Rg1 f5 2. Rxg7+ Kxg7 3. Rh3 Ng6 4. Bxf5 exf5 5. Qh7+ Kf8 6. e6 Bd6 7. Qxg6 Be5 8. Rh5 Bg7 9. Nd4 Bxd4 10. Rxf5+

Of course one can find alternative moves for both lines, but let's have a look at the end- positions of such two lines seperately, I think 1.Rg1 yet has the edge ofer 1.Rh3.

Walter already said, he'd have a second look at this one, maybe engine is asked too much to discriminate these two moves exactly enough at short time computing.
I just wanted to show that as for my trials they do better after Forward- Backward of just some more moves then the first one only, so I think they could do better before too.

I agree that 1.Rg1! is probably slightly better, and it is certainly more elegant and aesthetically pleasing, but I think you summed up my premise quite nicely when you said this:

"Walter already said, he'd have a second look at this one, maybe engine is asked too much to discriminate these two moves exactly enough at short time computing. "

Thanks for taking the time to check this with your computer analysis.

[Dann Corbit]

Here are results from some chess engines given fairly long time control. None of the machines used was a world beater. I keep my strongest machines for certain special long term projects.

Houdini:
4K2k/1pQp3p/1R4p1/1P4P1/8/3P3P/1q3r2/8 w - - acd 33/90; acs 13319 ; acn 156705156961; ce 0 ; bm Qc8; pv Qc8 Qe5+ Kxd7+ Kg7 Rxb7 Rf7+ Kd8 Qxg5+ Ke8 Qe3+ Kd8 Qg5+ Ke8;
5B2/1p1nNp2/8/1P2R3/3p3q/8/p1K1P1Q1/k3b3 w - - acd 32/79+; acs 6624 ; acn 63879410106; ce 903 ; bm Ng6; pv Ng6;
r1q2k2/pppb3r/2n1pBp1/3pPp1p/3P1Q1P/P2B4/2P2PP1/R3K2R w KQ - acd 30/79; acs 16745 ; acn 181077293483; ce 62 ; bm c4; pv c4 Ne7 Rc1 Bc6 c5 Ng8 Bg5 a6 0-0 Bb5 Rc3 Rf7 Rb1 Bxd3 Rxd3 Kg7 Kh2 a5 a4 Ra7 Rb5 Qe8 Rdb3 Kh7 Kg1 Qa8 Qc1;
7q/P3RP2/2p2n2/8/N7/p7/2B5/k1K2b2 w - - acd 24/75; acs 12898 ; acn 190694047514; ce 0 ; bm Re1; pv Re1 Qh6+ Kd1 Ka2 Bb1+ Kxb1 Rxf1 Qe3 Nc3+ Qxc3 f8Q Qd3+ Ke1 Qe3+ Kd1 Qd3+ Ke1;
7k/1p5p/2qpn1PP/Pp1p4/8/3B2p1/3B1pP1/R4K2 w - - acd 39/97; acs 17001 ; acn 208968042712; ce 0 ; bm a6; pv a6 bxa6 Rxa6 Qxa6 Bc3+ d4 Bxd4+ Nxd4 g7+ Kg8 Bc4+ d5 Bxd5+ Qe6 Bb3 b4 Bd5 Kf7 Bb3 Qxb3 g8Q+ Kf6 Qg7+ Ke6 Qe5+ Kd7 Qd6+ Ke8 Qe7+ Kxe7;
2r1k1r1/3q4/p1nBpp1p/8/B5p1/4RbK1/PP1Q1P1P/2R5 w - - acd 28/99; acs 22493 ; acn 290694174095; ce 202 ; bm Bb3; pv Bb3 Nd8 Rxc8 Qxc8 h4 Kf7 Bf4 Kg7 Bxh6+ Kh8 Rc3 Nc6 Qd6 Qb8 Qxb8 Rxb8 Bxe6 Rxb2 Bc1 Re2 Bxg4 Bxg4 Rxc6 Be6 Rxa6 Bxa2 Rxf6 Re6 Rf8+ Kh7 h5 Re1 Be3 Rg1+ Kh4 Rh1+ Kg5 Rg1+ Kf5 Rg7 Ra8 Bc4 h6 Rd7 Re8 Bf7 Rc8;
r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - acd 26/95-; acs 17107 ; acn 219589300981; ce 148 ; bm Rh3; pv Rh3 f5;
r3kb1r/4Pp2/pn3P2/1pp3B1/2p5/2N3P1/PP3P1P/3RKB1b w kq - acd 33/84; acs 15426 ; acn 193566468948; ce 0 ; bm exf8B; pv exf8B Kxf8 Be3 Rh5 Rd6 Rb8 Be2 Re5 Kf1 b4 Nd1 Be4 f3 Bd3 Bxd3 cxd3 Bf4 Ree8 Nf2 Nc4 Rxd3 Rbd8 b3 Rxd3 Nxd3 Ne3+ Kf2 Nd1+ Kf1 Ne3+ Kf2;
6r1/6r1/2p1k1pp/p1pbP2q/Pp1p1PpP/1P1P2NR/1KPQ3R/8 b - - acd 32/93+; acs 21270 ; acn 278358008340; ce -409 ; bm gxh3; pv gxh3;
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - acd 37/91; acs 12738 ; acn 157928918364; ce 161 ; bm Ra7; pv Ra7 Bc2 Kd7 Bd1 Kc6 Be2 Rc7 Bf1 Rbb7 Bg2 Rc8 Rd1 Rd8 Rd5 Ra8 Rd1 Rab8 Bf1 Rg7 Rd2 Rd7 Rd5 Rc7 Rd1 Rcb7 Bg2 Rd7 Rd5 Rc8 Bf1 Rcd8 Bg2 Re8 Bf1 Rb7 Rd1 Rd8 Rd5 Rb4 Rd2 Rdb8;


Stockfish:
4K2k/1pQp3p/1R4p1/1P4P1/8/3P3P/1q3r2/8 w - - acd 53/28; acs 14966 ; acn 65656206079; ce 0 ; bm Rf6; pv Rf6 Re2+ Kd8 Qxb5 Qd6 Qa5+ Kxd7 Qb5+ Kc7 Rc2+ Kd8 Qa5+ Kd7 Qb5+ Kd8;
5B2/1p1nNp2/8/1P2R3/3p3q/8/p1K1P1Q1/k3b3 w - - acd 53/30; acs 16502 ; acn 72467861655; ce 0 ; bm Qe4; pv Qe4 Nxe5 Qxh4 Bxh4 Nf5 d3+ exd3 Nxd3 Bg7+ f6 Nxh4 Nb4+ Kb3 Nd5 Kc2 Nb4+;
r1q2k2/pppb3r/2n1pBp1/3pPp1p/3P1Q1P/P2B4/2P2PP1/R3K2R w KQ - acd 41/53; acs 6291 ; acn 19802970704; ce 64 ; bm c4; pv c4 dxc4 Bxc4 Ne7 Qg5 b5 Be2 Qe8 0-0 c6 Rac1 Nd5 Bf3 Nb6 Rc5 Rc8 Rfc1 Na4 R5c2 Nb6 Be2 Rb8 Qd2 Kg8 Rc3 Nd5 Rg3 a5 Qg5 Kf8 Bf3 b4 Rb1 Qf7 Bxd5 cxd5 Qd2 Be8 axb4 Qb7 Rgb3 a4 Rg3 Kg8 Qg5;
7q/P3RP2/2p2n2/8/N7/p7/2B5/k1K2b2 w - - acd 51/87; acs 13770 ; acn 59006696315; ce 12335 ; bm a8Q; pv a8Q Qxa8 Nc5 Bc4 Ra7 Qxa7 f8Q Qb6 Bb3 Bf7 Qd6 Bxb3 Qxf6+ Ka2 Qf2+ Ka1 Qd4+ Ka2 Qd2+ Bc2 Qxc2+ Qb2+ Kd1 Ka1 Qc1+ Ka2 Qc4+ Ka1 Nd3 Qh8 Qc1+ Ka2 Qd2+ Kb1 Qb4+ Ka1 Qe1 Qh2 Qc3+ Kb1 Qc1+ Ka2 Qc2+ Qxc2+ Kxc2;
7k/1p5p/2qpn1PP/Pp1p4/8/3B2p1/3B1pP1/R4K2 w - - acd 37/77; acs 10586 ; acn 46548337255; ce -822 ; bm g7+; pv g7+ Kg8 Ra3 Qe8 Bxh7+ Kxh7 Rxg3 Qg8 Kxf2 Nc5 Ke1 Ne4 Rf3 Qe6 Rf8 Nf6+ Kf2 Ng8 Rf4 Qxh6 Kg1 Qe6 Kf1 Nh6 Bc3 Qe3 Rf3 Qc1+ Ke2 Qc2+ Bd2 Kxg7 Rd3 Kf6 Rc3 Qe4+ Kd1 Qxg2 Bxh6 Qh1+ Kc2 Qxh6 Rf3+ Ke6 Rf2 Qe3 Rf8 Qe4+ Kd2 Qc4 Rf3 d4;
2r1k1r1/3q4/p1nBpp1p/8/B5p1/4RbK1/PP1Q1P1P/2R5 w - - acd 43/81; acs 16722 ; acn 61898947362; ce 195 ; bm Bb3; pv Bb3 Nd8 Rxc8 Qxc8 h4 Kf7 Bf4 Bc6 Rc3 Qd7 Qxd7+ Bxd7 Rc7 Ke8 Bxh6 f5 Be3 Rg7 Ra7 Nc6 Rxa6 Kd8 Bc5 e5 Kg2 Rh7 Bd5 Ne7 Bb6+ Ke8 Ra8+ Nc8 Bc7 Rxh4 Bxe5 Rh3 Bb7 Kd8 b3 Rd3 b4 Be6 Kf1 Rd2 a4 Rc2 b5 Ke7 Ra6 Rc5 Bb8 Bc4+ Kg2 Bd5+ Bxd5 Rxd5 Rc6 Nd6 Bxd6+ Rxd6;
r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - acd 42/104; acs 14980 ; acn 50631053420; ce 197 ; bm Rh3; pv Rh3 f5 Re1 f3 Qh8+ Kf7 Rg3 g6 Reg1 Rec8 Nd4 f2 R1g2 Qc5 Rxg6 Nxg6 Qh7+ Ke8 Qxg6+ Kd7 Qxe6+ Kc7 Rg7 Re8 Nxf5 Kd8 Nxe7 Rxe7 Qf6 Qe3+ Kb1 Qxe5 Qxb6+ Rc7 Rf7 d4 Rxc7 Qxc7 Qxd4+ Kc8 Qxf2 Qd6 a5 Kd8 Qh4+ Kc7 Qc4+ Bc6 Qf7+ Qd7 Qf2 Qd6 Qb6+ Kd7 Bf5+ Ke7 Qe3+ Kf7 Bd3 Re8 Qf2+ Qf6 Qa7+ Kf8 Bc4 Re7 Qxa6 Kg7 Qb6 Re1+ Ka2 Kh6;
r3kb1r/4Pp2/pn3P2/1pp3B1/2p5/2N3P1/PP3P1P/3RKB1b w kq - acd 49/60; acs 17261 ; acn 61629943950; ce 0 ; bm exf8Q+; pv exf8Q+ Kxf8 Be3 Ke8 h4 b4 Nb1 Rh5 Nd2 c3 bxc3 Nd5 cxb4 Nxe3 fxe3 cxb4 e4 Rc5 Bc4 Bf3 Rb1 a5 Bd5 Rxd5 exd5 Bxd5 Nb3 Ra6 Rb2 Re6+ Kd2 Rxf6 Nxa5 Rf2+ Kc1 Rf1+ Kd2 Rf2+;
6r1/6r1/2p1k1pp/p1pbP2q/Pp1p1PpP/1P1P2NR/1KPQ3R/8 b - - acd 44/87; acs 12681 ; acn 51442543068; ce -438 ; bm gxh3; pv gxh3 Nxh5 gxh5 Rxh3 Rg2 f5+ Kxf5 Qxh6 Kxe5 Qxh5+ Kd6 Qf5 R2g7 Qf4+ Kd7 h5 Rf7 Qc1 Kc7 h6 Kb6 Rh5 Rh7 Rg5 Rd8 Qf4 Rxh6 Rxd5 Rxd5 Qxh6 Rd8 Qf6 Re8 Qf5 Rg8 Qe5 Rd8 Qe4 Rg8 Qe7 Rh8 Qd7 Rb8 Qf7 Rh8 Qf3 Re8 Qg2 Rb8 Qh2 Rg8 Qf2 Ra8 Qf4 Rg8 Qf5;
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - acd 69/76; acs 5638 ; acn 21792463349; ce 212 ; bm Raa8; pv Raa8 Bc2 Ke6 Bd1 Rb4 Be2 Rh8 Rd1 Rb7 Rd5 Rb6 Bd1 Kf6 Be2 Rhb8 Kc2 R8b7 Kc3 Rh7 Bf1 Ke6 Be2 Rb8 Bf1 Rd8 Be2 Ra8 Bd1 Rha7 Be2 Rb8 Rd1 Rg8 Rd2 Raa8 Rd5 Rh8 Rd1 Rab8 Rd5 Rbg8 Rd1 Ra8 Rd5 Rhc8 Rd2 Ra7 Rd1 Rb8 Kc2 Rh7 Kc3 Rb4 Kc2 Rg7 Kc3 Rb8 Rd5 Ke7 Rd1 Kd7 Rd5 Ke6 Rd1 Rgg8 Rd5 Rgd8 Rd1 Kf6;


Komodo:
4K2k/1pQp3p/1R4p1/1P4P1/8/3P3P/1q3r2/8 w - - acd 47; acs 15242 ; acn 29805901755; ce 0 ; bm Qxd7; pv Qxd7 Qe5+ Qe7 Qb8+ Kd7 Rf8 Re6 Qc8+ Kd6 Rd8+ Ke5 Qc3+ Kf4 Qd2+ Kf3 Rxd3+ Re3 Qd1+ Kg3 Qg1+ Kf3 Qh1+ Kg3 Qg1+;
5B2/1p1nNp2/8/1P2R3/3p3q/8/p1K1P1Q1/k3b3 w - - acd 46; acs 12981 ; acn 14864497151; ce 0 ; bm Qe4; pv Qe4 Nxe5 Qxh4 Bxh4 Nf5 Nf3 Nxh4 d3+ exd3 Nd4+ Kc1 Nb3+ Kc2 Nd4+;
r1q2k2/pppb3r/2n1pBp1/3pPp1p/3P1Q1P/P2B4/2P2PP1/R3K2R w KQ - acd 39; acs 15031 ; acn 18154865817; ce 89 ; bm 0-0; pv 0-0 Be8 c4 Ne7 Rfc1 dxc4 Bxc4 Qd7 Rab1 Rb8 Qg5 Kg8 a4 Nd5 Bb3 c6 a5 Rc8 Rc2 Nc7 Qd2 Nb5 Rd1 Nc7 Ra1 Nd5 Rb1 Rb8 Rbc1 b6 axb6 axb6 Qg5 Rc8 Ra2 Qb7 Rca1 c5 dxc5 bxc5 Bc4 Qb4 Rc2 f4 Rcc1;
7q/P3RP2/2p2n2/8/N7/p7/2B5/k1K2b2 w - - acd 39+; acs 17732 ; acn 24532694061; ce 14 ; bm a8Q; pv a8Q Qxa8 Nc5;
7k/1p5p/2qpn1PP/Pp1p4/8/3B2p1/3B1pP1/R4K2 w - - acd 38+; acs 14753 ; acn 24611009971; ce -594 ; bm g7+; pv g7+ Kg8 Ra3;
2r1k1r1/3q4/p1nBpp1p/8/B5p1/4RbK1/PP1Q1P1P/2R5 w - - acd 37+; acs 16420 ; acn 31711372169; ce 171 ; bm Bb3; pv Bb3 Nd8 Rxc8;
r3rnk1/1bq1bpp1/pp2p3/3pP2Q/P4p2/1NNB1R2/1PP4P/2KR4 w - - acd 39+; acs 16542 ; acn 30273650997; ce 112 ; bm Rh3; pv Rh3 f5 Re1;
r3kb1r/4Pp2/pn3P2/1pp3B1/2p5/2N3P1/PP3P1P/3RKB1b w kq - acd 45; acs 17777 ; acn 28694488526; ce 0 ; bm exf8Q+; pv exf8Q+ Kxf8 Be3 Ke8 h4 b4 Nb1 Rh5 Be2 Rf5 Rd6 Nc8 Rd2 Nb6 Rd6;
6r1/6r1/2p1k1pp/p1pbP2q/Pp1p1PpP/1P1P2NR/1KPQ3R/8 b - - acd 46; acs 16751 ; acn 34229355740; ce -428 ; bm gxh3; pv gxh3 Nxh5 gxh5 Rxh3 Rg2 f5+ Kxf5 Qxh6 Kxe5 Qxh5+ Kd6 Qf5 Kc7 h5 Kb6 h6 Re8 Qf4 Rg1 Rg3 Rxg3 Qxg3 Bg8 Qg7 Rc8 Qh8 Kc7 Qe5+ Kb6 Qg7 Ra8 Qh8 Kb7 h7 Bxh7 Qxh7+ Kb6 Qd7 Rf8 Qe7 Rc8 Qf6 Re8 Qg7 Ra8 Qe5 Rf8 Qd6 Re8 Qg6 Rh8 Qg2 Re8 Qg5 Rh8 Qg6 Rf8 Qg7;
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - acd 62; acs 13107 ; acn 22380459998; ce 189 ; bm Ke6; pv Ke6 Bc2 Rb4 Bd1 Ra8 Be2 Ra7 Bf1 Rab7 Be2 Rb8 Rd1 Rd8 Rd5 Kd7 Bf1 Kc6 Be2 Rd7 Bf1 Ra7 Bg2 Ra8 Bf1 Rbb8 Bg2 Rb7 Rd1 Rb4 Rd5 Rd8 Bf1 Rb7 Bh3 Rdb8 Bg2 Rd7 Bh3 Rdd8 Bf1 Ra8 Bg2 Ra7 Bf1 Rb8 Bg2 Rab7 Rd2 Rd7 Rd5 Ra8 Bh3 Rda7 Rd1 Rb8 Rd5 Rg7 Bf1 Ra8 Bg2 Rga7 Bf1;