Zarkov 6.55 Settings

[AdminX]

Are these the best settings for Zarkov 6.55?

From ZarkovX.ini file

Code: Select all

[Engine]
book_variety=2
book_style=0
ponder=1
transposition_table=1
ttable_size=64000
persistant_ttable=1
learn_table=0
useNullMove=1
useLMR=1
useRazor=1
check_extension=100
pawn7th_extension=50
capture_extension=25
one_reply_extension=50
pawn_value=100
knight_value=337
bishop_value=345
rook_value=528
queen_value=1018
Mobility=105
Pawn_structure=105
PassedPawns=100
KingSafety=120
draw_score=0

[Preferences]
name=Zarkov Karpov
log=0

Are there other or better settings?


Black to Move

Here Zarkov played the lemon 60. Nxe5

[pgn]
[Event "Computer event"]
[Site "Somewhere on Earth"]
[Date "2021.10.16"]
[Round "1.122"]
[White "Zarkov 6.55"]
[Black "Gambit Tiger 2007"]
[Result "1/2-1/2"]
[ECO "B41"]
[PlyCount "170"]
[EventDate "2021.??.??"]
[TimeControl "40/300+1:0"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 {End of opening} 6. Nc3 {
0.01/1 5187} Bb4 {0.00/1 586} 7. Bd3 {0.01/1 47 7.Qd3 is the modern
continuation.} Nc6 {0.00/1 10; B41: Sicilian, Kan, Maroczy bind - Bronstein
variation} 8. Bc2 {0.01/1 47} Qc7 {0.00/1 10 B41: Sicilian: Kan Variation: 5
c4.} 9. Nxc6 {-0.12/23 13456 14737974} (9. O-O $142 {0.30/23}) 9... dxc6 $11 {
-0.06/16 [#] 12062 14497103} 10. Qf3 $146 {0.03/12 13407 11382193} ({
Predecessor:} 10. O-O e5 11. Bg5 Be7 12. Qe2 Be6 13. Rad1 O-O 14. h3 b5 15.
cxb5 axb5 16. Bb3 Bxb3 17. axb3 {0-1 (33) Ollier,M (2011)-Saatdjian,T (2312)
Avoine 2009}) 10... Bd6 {0.32/24 9381 11234182} (10... e5 $11 {-0.21/24}) 11.
Bg5 {0.15/12 13412 10967156} Nd7 {0.77/21 1449 18244258} (11... e5 $11 {0.09/24
}) 12. O-O-O $16 {0.51/11 13415 11217310} O-O {-0.46/16 16247 20344044} 13. Qd3
{0.41/13 17 15473211} Be5 {1.38/24 11318 13577868} (13... Bf4+ $142 {0.94/25}
14. Bxf4 Qxf4+ {Double Attack} 15. Qd2 Qxd2+ 16. Rxd2 e5) 14. Be7 {0.33/29
14115 12432447} (14. Be3 $16 {1.38/24}) 14... Re8 {0.84/23 8432 9800450} (14...
Bf4+ $1 $14 {0.33/29} 15. Kb1 Ne5) 15. Bd6 {0.52/13 5666 12862555} Qa5 {
2.51/23 5150 12069227} (15... Bf4+ $16 {1.01/28} 16. Kb1 Bxd6 17. Qxd6 Qxd6 18.
Rxd6 e5) 16. f4 $1 $18 {0.21/13 14606 11317275} Bxd6 {-0.56/19 8196 9837664}
17. Qxd6 {0.15/13 6395 12067427} e5 {-0.50/19 3552 11581836} 18. f5 $1 {
0.16/13 10701 13227660} Nc5 {0.00/19 [#] 8039 22924821. White must now prevent
...Bxf5!} 19. Rhf1 {0.77/27 5604 12952604} (19. Nb1 $1 $18 {1.61/25 has better
winning chances.}) 19... f6 {1.49/26 10276 12986911} (19... Bd7 $142 {0.77/27})
20. Nb1 $40 {0.74/23 3078 13382689. White attacks with force.} (20. Qd2 $142 {
1.49/26}) 20... Kh8 $2 {3.40/26 10311 12955964} (20... Bxf5 $16 {0.74/23} 21.
exf5 (21. Rxf5 Rad8 $14) 21... Rad8) 21. g4 {2.02/22 24651 25240061} (21. a3
$142 {3.40/26}) 21... Nd7 {3.42/22 16190 20664070} (21... Qb6 {2.02/22 keeps
fighting.}) 22. a3 {0.74/13 11769 11542355} Ra7 {0.41/19 17069 21218807} 23.
Nd2 {0.72/14 30 17068626} Qb6 {0.36/19 9823 11848697} 24. Nf3 {0.86/13 11146
10267066} Qe3+ {0.34/18 385 14350685} 25. Kb1 {0.86/13 10120 10127040} b5 {
0.46/20 9956 25700735} 26. Qxc6 {1.20/13 9958 9326871} bxc4 {0.30/19 1677
15939711} 27. Qxc4 {1.14/12 7700 8576768} Nb6 {0.26/20 17756 36390571} 28. Qd3
{1.14/13 21 16693418} Qxd3 {0.26/20 18563 28042443} 29. Bxd3 {1.03/14 27
19854009} Rd7 {0.60/20 8968 13747320} 30. Bc2 {1.08/13 113 9241953} Rdd8 {
2.88/25 21980 34866505} (30... Rc7 $142 {2.00/25} 31. Rfe1 Bb7) 31. b3 {
1.22/13 9141 10027011} Bb7 {0.68/21 25131 55627936} 32. g5 {1.18/13 8638
9076840} Nc8 {0.62/19 7482 11979603} 33. Rxd8 {1.17/14 662 8921769} Rxd8 {
0.80/16 1493 2247792} 34. Kb2 {1.10/13 6673 9106834} Kg8 {0.60/19 23292
40808170} 35. b4 {0.90/13 8183 8911816} Nd6 {0.52/17 286 14599931} 36. Re1 {
0.87/26 7076 8656728} (36. Rd1 $18 {1.80/26 and White stays clearly on top.})
36... Kf7 {0.54/17 1139 14617665} 37. Kb3 {0.89/12 6993 7631537} h6 {1.91/28
15434 40479436} (37... a5 $16 {1.32/25 was worth a try.}) 38. gxf6 {0.75/27
6618 7456508} (38. g6+ $1 $18 {1.91/28} Ke7 39. Re3) 38... gxf6 $16 {0.44/19
8400 14982851} 39. Re3 {0.07/23 19 9507088} (39. Re2 $16 {0.88/24}) 39... Rg8
$1 $11 {0.48/19 8039 14214341} 40. h3 {0.94/13 18 8842060} Rg2 {0.34/20 9210
15990380} 41. Bd3 {0.54/16 40142 47274858} Bc6 {0.49/24 233 72906754} (41...
Ke7 $11 {0.00/27 might be stronger.}) 42. a4 {0.86/14 22700 25129948} Ke8 {
0.15/22 253 41288248} 43. Nh4 {0.00/28 21338 23699909} ({Much weaker is} 43.
Bxa6 Bxe4 44. Bd3 Bd5+ 45. Kc3 Rg3 $17) (43. Ne1 $14 {0.51/27} Rf2 44. Bxa6
Bxe4 45. Bc4) 43... Rg1 {0.13/22 61 38473746} 44. a5 {0.25/15 20063 22835966}
Bb5 $1 {0.15/20 10291 19898404} 45. Nf3 {0.12/16 8575 24564929} Rg3 {-0.02/22
11487 22606632} 46. Bxb5+ {0.00/17 6903 23169652} Nxb5 {0.00/24 Endgame 6056
27616228. KRN-KRN} 47. Kc4 {0.00/18 11966 22649547} Rxh3 {0.11/23 196 25298095}
48. Kc5 {0.80/16 17344 20818973} Ke7 $2 {4.10/25 35206 69305599} ({Black
should play} 48... Nd4 $1 $14 {0.39/24} 49. Kb6 Kd8) 49. Kb6 $1 $18 {0.58/17
16327 19023927} Nd6 {1.05/22 177 31200833} 50. Kxa6 {0.71/16 15362 17493514}
Rg3 {1.16/20 189 28195312} 51. Rb3 {0.75/15 14271 16318299} Rg8 {1.16/19 7706
13661444} 52. Nd2 {0.95/15 13649 15083017} h5 {1.05/20 249 25527015} 53. Kb6 {
0.70/15 12596 13637742} Rb8+ {1.34/20 2189 25569698} 54. Ka7 $1 {0.70/15 9930
12992981} Rb7+ {1.64/21 13284 42282502} 55. Ka6 {1.49/25 23 15328868} (55. Ka8
$1 $18 {3.32/29 is the precise move to win.}) 55... Rb8 $16 {0.95/21 7823
14587123} 56. b5 $2 {0.06/28 3795 12996466} (56. Ka7 $1 $18 {2.49/26} Rb5 57.
Nb1 Rb7+ 58. Ka8) 56... h4 $11 {0.86/19 6312 19988234} 57. Ka7 {1.01/15 11456
13542757} Rb7+ {0.58/22 8549 17233628} 58. Ka6 {0.81/15 [#] 2236 11772342.
Threatens to win with b6.} Rb8 {0.01/25 8378 17514085} 59. Nf3 {0.35/28 2333
12443166} (59. Nf1 $1 $16 {0.99/26}) 59... h3 {1.77/24 17190 39002926} (59...
Ra8+ $1 $14 {0.35/28} 60. Kb6 Nc4+ 61. Kc7 Ra7+ 62. Kc6 Rd7) 60. Nxe5 $2 {
0.00/39 34565 59626271} fxe5 {0.99/17 8993 18629514. The position is equal.}
61. Rxh3 {0.19/15 23 10218835. Strongly threatening Rh7+.} Nxb5 $18 {1.18/17
12691 24905634. KRN-KR} ({Reject} 61... Nxe4 $6 62. b6 $16) 62. Rh7+ {0.07/17
21 15944470} Kd6 {0.14/23 8253 18534420. Hoping for ...Kc6.} 63. Rb7 {0.16/18
400 11196643} Nc7+ {0.12/22 7465 18282969} 64. Kb6 $1 {0.16/18 1225 10985971}
Rc8 $1 {0.10/23 8872 23408050} 65. f6 {0.20/17 26 11097349} Ne6 {0.00/22 11979
27313318} 66. a6 {0.22/15 8747 10597527} Nc5 {0.00/20 47 19371408} 67. a7 {
0.24/15 8207 10202509} Nxb7 {0.00/24 1126 20691940} 68. Kxb7 $11 {0.12/19 1215
4340010. KR-K3P} Rf8 {0.00/36 8833 28825464} (68... Rh8 {looks sharper.} 69. f7
Rd8 70. a8=Q Rxa8) 69. a8=Q {0.00/25 7805 17568515} Rxa8 {0.00/44 1825 27625363
} 70. Kxa8 {0.00/24 570 7444138. KPP-KP} Ke6 {0.00/59 215 726} 71. Ka7 {
0.00/46 7394 16863445} Kxf6 {0.00/59 107 954. ( -> ...Kg5). KP-KP} 72. Kb6 {
0.00/57 1268 4052410} Ke7 {0.00/59 59 1001} 73. Kc5 {0.00/57 834 2119214} Ke6 {
0.00/59 56 844} 74. Kc6 {0.00/57 96 243730} (74. Kb4 {seems wilder.} Kf7 75.
Kc5 Ke6) 74... Ke7 {0.00/59 134 466} 75. Kd5 {0.00/57 51 115335} Kd7 {0.00/59
167 550} 76. Kxe5 {0.00/40 7166 37914089. White threatens Kf6 and mate. KP-K}
Ke7 {0.00/59 129 568} 77. Kf4 {0.00/57 1769 5853385. Intending Ke5 and mate.}
Kf6 {0.00/59 91 1022} 78. e5+ {0.00/57 196 626362} Ke6 {0.00/59 144 879} 79.
Ke4 {0.00/57 41 237366} (79. Kf3 {is more complex.} Kxe5) 79... Kd7 {0.00/59
177 501} 80. Kd5 {0.00/41 6600 46988421} Ke7 {0.00/59 41 548} 81. e6 {0.00/47
42108 301689666} Ke8 {0.00/59 218 401} 82. Kc6 {0.00/57 59 106145} Ke7 {
0.00/59 51 556} 83. Kd5 {0.00/57 7722 58455020} Ke8 {0.00/59 27 239} 84. Kc6 {
0.00/57 50 3426} Ke7 {0.00/59 73 212} 85. Kb7 {0.00/57 21924 163607624} Kxe6 {
insufficient material +0.00/59 151 2350. Black escapes into a draw. Weighted
Error Value: White=0.41/Black=0.36} 1/2-1/2
[/pgn]

[matejst]

The values in my ini file are a bit different, but I can't remember now if I changed them myself or they were such before. Anyway, Zarkov 6.55 is an interesting engine. It is about 2650 Elos, about the strength of Gandalf 7, although Gandalf is better in tactical, while Zarkov is better in quiet positions.

[matejst]

Probably the default settings:

[Engine]
book_variety=2
book_style=0
ponder=1
transposition_table=1
ttable_size=64000
persistant_ttable=1
learn_table=0
useNullMove=1
useLMR=1
useRazor=1
check_extension=100
pawn7th_extension=50
capture_extension=25
one_reply_extension=50
pawn_value=100
knight_value=340
bishop_value=340
rook_value=530
queen_value=1040
Mobility=100
PassedPawns=100
KingSafety=100
draw_score=0

[AdminX]

Probably the default settings:

[Engine]
book_variety=2
book_style=0
ponder=1
transposition_table=1
ttable_size=64000
persistant_ttable=1
learn_table=0
useNullMove=1
useLMR=1
useRazor=1
check_extension=100
pawn7th_extension=50
capture_extension=25
one_reply_extension=50
pawn_value=100
knight_value=340
bishop_value=340
rook_value=530
queen_value=1040
Mobility=100
PassedPawns=100
KingSafety=100
draw_score=0

Okay, thank you for the reply. I was able to find the info below from John Stanback's website, but I am not sure if any of this data applied to 6.55.

2. Position Evaluation

For generations chess Grandmasters have written books describing various positional elements which are good and those which are deemed poor. Some of these concepts are relatively simple to program, such as computing piece mobility and detecting doubled or isolated pawns. Other concepts such as piece cooperation or king safety are more difficult to define in strict mathematical terms even though they may be intuitively obvious to a human. The major factor contributing to Zarkov's evaluation is the material value for the pieces on each side. The basic piece values are: Pawn=100, Knight=325, Bishop=335, Rook=540, Queen=1050. Since most moves in a chess game do not lead to the win of material, the move choice is usually governed by the positional chess knowledge contained in the program. Zarkov contains about 100 positional 'heuristics' which are oriented toward developing pieces, creating piece mobility, achieving decent pawn structure, attacking the enemy king, promoting pawns etc... The material value of the pieces as well as the value of the positional bonuses varies depending on the total material remaining on the board. There are two main philosophies employed in computer chess programs:

[AdminX]

Confused ...

The file size of both are the same, however if I execute either of them I get the same output. The both say version 650. I downloaded my package from Frank's Webpage, does anyone see the same on there end. Note also that the 655 version has a earlier date than the 650 version.

[matejst]

Same here, and I checked the zip files from Frank's Zarkov download. I guess Frank will answer when he sees this topic -- he is always keen to. One could also notice that the winboard 4.99 version is 6 years younger than the MCS 5.01 version, so, it's a bit confusing.

[Guenther]

A simple binary comparison shows that Zarkov 6.50 and 6.55 are indeed different, but with a very tiny difference only.
An educated guess would be that internal renaming was simply forgotten, because the change was so tiny.

(about dates: you cannot rely on given dates, they could have been changed already long ago and the original date might be long gone,
after file operations, like zipping and unextracting, or moving to other HDs or whatever actions)

[AdminX]

A simple binary comparison shows that Zarkov 6.50 and 6.55 are indeed different, but with a very tiny difference only.
An educated guess would be that internal renaming was simply forgotten, because the change was so tiny.

(about dates: you cannot rely on given dates, they could have been changed already long ago and the original date might be long gone,
after file operations, like zipping and unextracting, or moving to other HDs or whatever actions)

Thank you Guenther,

I just got around to downloading and installing a Hex Editor. It is indeed as you said. So I just went ahead and edited the binary version name so it would display correctly from the command line.

[AdminX]

So I decided to go with these setting:

Code: Select all

[Engine]
book_variety=2
book_style=0
ponder=1
transposition_table=1
ttable_size=256000
persistant_ttable=1
learn_table=1
useNullMove=1
useLMR=1
useRazor=1
check_extension=100
pawn7th_extension=50
capture_extension=25
one_reply_extension=50
pawn_value=100
knight_value=340
bishop_value=340
rook_value=530
queen_value=1040
Mobility=100
PassedPawns=100
KingSafety=100
draw_score=0

Just started a 50 game match with Gandalf 7 (2 Threads), and a Time Control of 15 Minutes. Zarkov 6.55 won the 1st two games. My favorite of the two had to be there 2nd game.

Game 1
[pgn]
[Event "Computer event"]
[Site "Somewhere on Earth"]
[Date "2021.10.17"]
[Round "2"]
[White "Gandalf 7.0"]
[Black "Zarkov 6.55"]
[Result "0-1"]
[TimeControl "900+1"]
[Time "06:07:06"]
[Board "1"]
[Termination "mate"]
[ECO "A50"]
[Opening "Kevitz-Trajkovich defence"]

1. d4 Nf6 2. c4 Nc6 {A50: Kevitz-Trajkovich defence}
3. Nf3 d6 4. Nc3 Bg4
5. d5 Nb8 {End of opening} 6. Qb3 {+0.80/15 54413 59760000} Qc8 {+0.54/13 32593 23714757}
7. h3 {+0.86/14 21879 23930000} Bd7 {+0.49/14 34412 25580103} 8. Be3 {+0.92/15 24296 25250000} e5 {+0.32/13 34409 25690151}
9. g4 {+0.89/16 26611 30210000} Be7 {+0.28/14 7784 25140167} 10. Bg2 {+0.73/16 50611 53930000} a5 {+0.37/14 35561 27575528}
11. g5 {+0.73/14 26694 28450000} Nh5 {+0.07/14 35572 27720445} 12. Nd2 {+0.83/14 19353 21050000} Nf4 {+0.04/14 35561 27580548}
13. Bxf4 {+1.05/15 25010 27570000} exf4 {+0.04/14 10530 27135720} 14. h4 {+0.83/15 48310 52210000} f6 {+0.13/14 36882 28525640}
15. gxf6 {+0.96/13 22490 24810000} Bxf6 {+0.13/14 36881 32341458} 16. Nde4 {+1.15/15 19748 24570000} Be5 {+0.12/13 36878 31181212}
17. O-O-O {+1.02/15 34506 43050000} b6 {+0.09/14 2357 29145857} 18. Qc2 {+0.96/12 19840 25450000} Na6 {+0.00/13 36795 31301136}
19. h5 {+1.08/13 18615 23410000} O-O {+0.00/13 15922 27055544} 20. h6 {+0.64/13 78237 90370000} g6 {-0.08/13 29 62152729}
21. Nb5 {+0.57/12 15818 20010000} Bf5 {-0.11/13 33675 30645713} 22. Bf3 {+0.48/12 17314 22410000} Qe8 {-0.03/13 31635 29650844}
23. Nd4 {+0.70/12 14636 19850000} Bxd4 {-0.40/15 29719 30426088} 24. Rxd4 {+0.96/13 3694 5850000} Nc5 {-0.44/15 24217 27660545}
25. Qc3 {+0.22/16 42072 61170000} Qe5 {-0.42/15 21 38398319} 26. Ng5 {+0.25/15 10794 15090000} a4 {-0.39/13 15730 24404561}
27. Rg1 {+0.38/13 10061 13090000} Rab8 {-0.47/13 15540 23089344} 28. Rgd1 {+0.06/13 47649 58210000} Rfe8 {-0.51/13 24706 23214642}
29. R1d2 {-0.44/13 33386 40890000} a3 {-1.14/14 23230 23244604} 30. Rd1 {-0.48/12 7095 9290000} axb2+ {-1.70/13 21829 22154443}
31. Qxb2 {-0.99/15 33759 47970000} Ra8 {-1.83/14 21 30021518} 32. R1d2 {-1.85/14 50484 72210000} Ra7 {-2.22/14 23 45178921}
33. Bg2 {-2.59/13 23669 32770000} Rea8 {-2.68/13 20653 21399299} 34. Be4 {-3.00/13 15342 22650000} Bxe4 {-3.03/12 5836 6121212}
35. Rxe4 {-3.20/15 4480 7290000} Qxb2+ {-3.08/15 14630 20979210} 36. Rxb2 {-3.36/17 4261 6890000} Nxe4 {-2.89/16 13999 19894135}
37. Nxe4 {-3.36/16 4307 6690000} Ra3 {-2.93/16 13142 18628605} 38. Kb1 {-3.13/14 4229 6090000} Rh3 {-3.38/14 16696 17938628}
39. Nf6+ {-3.39/13 4209 5890000} Kf7 {-3.43/15 15716 16858393} 40. Ne4 {-3.39/13 4103 5890000} Rxh6 {-3.83/13 14792 15078108}
41. Ng5+ {-3.58/13 3984 5370000} Kf6 {-4.00/14 9939 13717725} 42. Ne6 {-3.77/14 7964 10930000} Rh1+ {-4.05/13 5400 12962563}
43. Kc2 {-3.77/6 10 12} f3 {-4.23/15 13081 13202672} 44. exf3 {-3.74/13 3633 4922000} Ra3 {-4.29/14 8704 12327460}
45. Nxc7 {-4.06/13 3974 6050000} Rxf3 {-4.67/13 7881 11932406} 46. Rb3 {-4.12/14 2547 3850000} Rxf2+ {-5.49/13 8879 11912395}
47. Kc3 {-4.12/14 2802 4050000} Rh3+ {-7.55/14 10944 11287274} 48. Kb4 {-8.16/17 19443 33370000} Rxb3+ {-7.55/13 24 18264005}
49. axb3 {-9.05/16 14695 21370000} h5 {-8.80/14 10386 11257264} 50. Kb5 {-10.20/16 10321 15290000} h4 {-9.33/13 20 9917171}
51. Kxb6 {-10.24/15 1858 3170000} h3 {-9.48/13 7987 9936828} 52. Nb5 {-10.81/14 3509 5610000} h2 {-10.22/11 9425 9546920}
53. Nxd6 {-10.56/13 2282 3290000} h1=Q {-10.38/11 6604 8176649} 54. Nb7 {-11.68/14 4884 8730000} Ke5 {-11.61/11 8543 7736557}
55. Nd8 {-11.07/11 1271 1890000} Rb2 {-13.16/11 8077 7356501} 56. Nc6+ {-16.99/13 6698 14290000} Kd6 {-18.42/11 7633 7266452}
57. Na5 {-20.44/13 5489 11250000} Qg1+ {-19.05/10 1720 6481329} 58. Ka6 {-20.89/13 4163 8650000} Qd4 {-99.86/10 3000 6466374}
59. c5+ {-32.49/10 3496 8730000} Kxd5 {-99.88/10 7050 7006402} 60. Kb7 {M-4/12 2656 7010000} Rf2 {-99.90/9 4003 6271257}
61. Ka8 {M-4/10 1394 3970000} Rf8+ {-99.92/7 641 563365} 62. Kb7 {M-4/10 2155 6610000} Qxc5 {-99.94/5 60 2234}
63. Ka6 {M-2/10 646 1890000} Ra8+ {-99.96/3 50 1792} 64. Kb7 {M-1/6 10 12} Qa7# {-99.98/1 53 319}
0-1
[/pgn]

Game 2
[pgn]
[Event "Computer event"]
[Site "Somewhere on Earth"]
[Date "2021.10.17"]
[Round "2"]
[White "Zarkov 6.55"]
[Black "Gandalf 7.0"]
[Result "1-0"]
[TimeControl "900+1"]
[Time "06:07:25"]
[Board "2"]
[Termination "mate"]
[ECO "A50"]
[Opening "Kevitz-Trajkovich defence"]

1. d4 Nf6 2. c4 Nc6 {A50: Kevitz-Trajkovich defence}
3. Nf3 d6 4. Nc3 Bg4
5. d5 Nb8 {End of opening} 6. e4 {+0.60/13 37422 26760494} e5 {+0.76/16 65424 73160000}
7. Be3 {+0.61/14 28 52245620} Nbd7 {+0.73/15 30472 35050000} 8. h3 {+0.51/15 35596 33026508} Bh5 {+0.67/15 34096 36130000}
9. Qb3 {+0.53/14 4386 31871389} Be7 {+0.80/14 28247 31810000} 10. Qxb7 {+0.68/15 36950 35012017} Rb8 {+1.24/16 110943 129010000}
11. Qa6 {+0.70/15 19 95749573} Rxb2 {+0.67/14 23348 27850000} 12. Qxa7 {+0.72/15 15338 31966025} O-O {+0.73/14 22577 28170000}
13. Qa3 {+0.76/15 39865 35147043} Rb7 {+0.70/14 57043 64490000} 14. Be2 {+0.90/14 39869 36807439} Nb6 {+0.83/14 28494 32810000}
15. Qa6 {+0.93/14 39869 35362112} Qa8 {+0.80/14 14146 17010000} 16. Qxa8 {+1.01/15 25706 35842162} Rxa8 {+0.99/16 45800 53210000}
17. Rb1 {+0.98/15 25 37551097} Ra3 {+0.99/14 16788 20330000} 18. Rb3 {+1.00/15 40807 41078223} Rxb3 {+1.02/14 16186 20410000}
19. axb3 {+1.08/15 11508 12267478} Bg6 {+1.08/16 30382 40370000} 20. Bd3 {+1.40/15 37665 39057840} Bh5 {+1.08/14 12543 16130000}
21. Ke2 {+1.57/15 35368 36447301} h6 {+1.24/14 22735 29210000} 22. Ra1 {+1.64/15 33226 33666746} Nfd7 {+1.44/14 26683 35090000}
23. Nb5 {+1.82/14 31210 31671348} Kh7 {+1.53/13 12562 16210000} 24. Na7 {+1.81/15 29319 30861172} Bg5 {+1.60/14 12093 16210000}
25. Bxg5 {+1.90/16 27556 33001645} Bxf3+ {+1.82/16 21134 30130000} 26. Kxf3 {+1.88/16 4745 27610517} Nc5 {+1.79/15 11855 17730000}
27. Bc2 {+2.01/16 13789 29525913} hxg5 {+1.79/16 10609 17010000} 28. Nc6 {+2.05/16 14234 28505738} Ncd7 {+1.69/15 9059 14170000}
29. Ra2 {+1.99/16 14957 27635524} g6 {+1.72/15 7556 11490000} 30. b4 {+2.51/16 23152 27685559} Nf6 {+1.72/16 9622 14210000}
31. Nd8 {+2.52/16 12137 24855605} Rb8 {+1.60/14 4576 6690000} 32. Nxf7 {+2.58/15 16488 23554103} Kg7 {+1.76/14 9303 13730000}
33. Nxg5 {+2.62/16 20109 22889582} Nxc4 {+2.43/16 58714 88690000} 34. Ra7 {+2.71/16 19 61447872} Rxb4 {+2.56/15 27259 41810000}
35. Rxc7+ {+2.77/16 24 28737181} Kg8 {+2.72/15 14283 21370000} 36. Rc8+ {+2.77/15 4738 20182062} Kg7 {+2.59/13 2662 4250000}
37. Ne6+ {+2.92/15 16127 21224260} Kf7 {+2.65/13 10770 16810000} 38. Nd8+ {+2.90/15 7073 19703964} Kg7 {+2.56/14 5989 9456201}
39. Rc7+ {+2.92/15 11475 19793966} Kh8 {+2.94/15 7837 12530000} 40. Ke2 {+2.92/15 8976 19063828} Na3 {+2.78/14 4155 6490000}
41. Nf7+ {+2.77/14 12155 19203864} Kg8 {+2.75/14 5624 9244358} 42. Nxd6 {+2.69/15 9991 18164039} Nxc2 {+2.65/14 7810 11890000}
43. Rxc2 {+2.88/14 3071 11442768} Nxe4 {+2.56/14 6538 9890000} 44. Rc8+ {+2.78/14 8386 16362425} Kg7 {+2.78/15 9717 14650000}
45. Rc7+ {+2.72/14 4745 15188066} Kf6 {+2.78/14 10853 15690000} 46. Nb7 {+2.74/13 14240 15963206} Rd4 {+2.49/11 5255 7690000}
47. Ke3 {+3.48/14 13417 15673151} Ng5 {+3.10/15 9396 14610000} 48. Nd6 {+3.56/15 3228 14307876} Rxd5 {+3.26/15 1949 3130000}
49. Ne8+ {+3.58/15 10541 15398096} Ke6 {+3.42/16 8562 14650000} 50. Rg7 {+3.57/15 3329 13928489} Rb5 {+3.48/14 2459 3890000}
51. Rxg6+ {+3.74/15 11754 14332830} Ke7 {+3.74/15 2460 3730000} 52. Rxg5 {+3.80/16 11083 12142448} Kxe8 {+3.77/15 3504 5530000}
53. Ke4 {+3.92/15 6935 10347091} Rb2 {+3.77/15 1877 2850000} 54. Rxe5+ {+3.96/16 8191 10432094} Kf7 {+3.87/15 6699 10730000}
55. Kf3 {+4.01/16 2923 9031847} Kf6 {+4.03/15 2786 4330000} 56. Re2 {+4.08/17 6716 9156826} Rb3+ {+4.03/15 1776 2730000}
57. Re3 {+4.08/17 7367 8736775} Rb1 {+4.16/15 3213 5090000} 58. g4 {+4.36/15 5534 7921606} Kg5 {+4.38/15 5170 8090000}
59. Rd3 {+4.44/16 3294 7921587} Rc1 {+4.35/14 3728 5890000} 60. Rd5+ {+4.62/16 8333 7996105} Kf6 {+4.38/15 1251 1930000}
61. h4 {+4.62/15 6609 7656552} Rc3+ {+4.64/14 2503 3810000} 62. Ke4 {+4.67/14 7522 7186413} Rc4+ {+4.64/14 2074 3130000}
63. Rd4 {+4.94/15 5028 6806391} Rc1 {+4.96/14 1860 2850000} 64. g5+ {+5.38/14 6863 6581331} Ke6 {+5.15/15 4236 7010000}
65. h5 {+5.37/14 2249 5941234} Re1+ {+5.53/14 3858 6650000} 66. Kf4 {+5.47/15 2546 6141219} Rh1 {+5.82/14 2761 4730000}
67. Re4+ {+5.80/14 3549 6041245} Kf7 {+5.69/14 2242 3850000} 68. Kg4 {+5.96/14 3911 5706136} Kg8 {+5.88/14 1191 1890000}
69. g6 {+7.57/14 5983 6056229} Kg7 {+6.88/13 2808 4450000} 70. Re7+ {+10.17/13 5673 5466110} Kf6 {+13.59/13 4007 6210000}
71. Rf7+ {+10.88/12 1356 4565977} Ke5 {+11.42/13 3150 5890000} 72. Rf3 {+12.80/12 3455 5471056} Ke6 {+14.65/13 2660 4010000}
73. g7 {+16.35/11 2586 4080837} Rg1+ {+18.78/14 2501 6010000} 74. Rg3 {+17.86/11 2591 4310877} Rxg3+ {M-10/15 1908 5210000}
75. fxg3 {+22.33/8 1516 1655198} Kf7 {M-7/15 1692 4570000} 76. h6 {+99.84/15 566 2439186} Kg8 {M-6/10 781 2210487}
77. Kf5 {+99.86/13 111 502598} Kf7 {M-6/13 1327 3850000} 78. Ke5 {+99.88/11 95 300664} Ke7 {M-4/11 933 2574280}
79. g8=Q {+99.90/9 101 76084} Kd7 {M-4/6 15 26682} 80. Qc4 {+99.92/7 2475 2627199} Ke8 {M-3/9 682 1906682}
81. h7 {+99.94/5 73 21153} Kd8 {M-3/8 727 2010000} 82. Qf7 {+99.96/3 46 4522} Kc8 {M-1/6 10 4295}
83. h8=Q# {+99.98/1 51 360} 1-0
[/pgn]

[reflectionofpower]

The values in my ini file are a bit different, but I can't remember now if I changed them myself or they were such before. Anyway, Zarkov 6.55 is an interesting engine. It is about 2650 Elos, about the strength of Gandalf 7, although Gandalf is better in tactical, while Zarkov is better in quiet positions.

I always liked the way Zarkov & Gandalf played. Zarkov was a very positional-type engine. Always solid in its moves.