Most common chess variant?

Discussion of chess software programming and technical issues.

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syzygy
Posts: 5563
Joined: Tue Feb 28, 2012 11:56 pm

Re: Most common chess variant?

Post by syzygy »

Ferdy wrote:It could be that that average player he mentioned was playing in FICS, and it beats a program once in while because that player is using takeback.
Allowing takebacks would be up to the program, and I don't know even of any regular chess programs on FICS that allow takebacks.

Just to be clear: takebacks are not part of crazyhouse, like they are not part of regular chess. The FICS server supports takeback requests for all variants, except bughouse. So crazyhouse and takebacks have no special relationship.

The "special note" you cited is not a crazyhouse rule. I admit its wording is a bit misleading.
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Ferdy
Posts: 4833
Joined: Sun Aug 10, 2008 3:15 pm
Location: Philippines

Re: Most common chess variant?

Post by Ferdy »

syzygy wrote:
Ferdy wrote:It could be that that average player he mentioned was playing in FICS, and it beats a program once in while because that player is using takeback.
Allowing takebacks would be up to the program, and I don't know even of any regular chess programs on FICS that allow takebacks.

Just to be clear: takebacks are not part of crazyhouse, like they are not part of regular chess. The FICS server supports takeback requests for all variants, except bughouse. So crazyhouse and takebacks have no special relationship.

The "special note" you cited is not a crazyhouse rule. I admit its wording is a bit misleading.
It is indeed not a crazyhouse rule but part of the crazyhouse help.
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Isaac
Posts: 265
Joined: Sat Feb 22, 2014 8:37 pm

Re: Most common chess variant?

Post by Isaac »

Ferdy wrote:It could be that that average player he mentioned was playing in FICS, and it beats a program once in while because that player is using takeback.
No, I made my engine's account to auto decline takebacks.
It lost against at least 3 players rated under 1900 (panefsky who was rated around 1800 which is just average, has beaten tjchess a few times).
So did Langoma who was around 1600 rated, he was well below the average.
The rating of tjchess and sunsetter on FICS is generally over 2500 because most people play 1 minute (for each side) games and they either lose on time in winning positions or make big blunders due to time pressure. A few guys use more time and beat the machine several times in a row even though it's rated 300 points higher.
I personally tried to beat both sunsetter and tjchess but couldn't so far. (I'm around 1700 in crazyhouse).
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Angrim
Posts: 97
Joined: Mon Jun 25, 2012 10:16 pm
Location: Forks, WA
Full name: Ben Nye

Re: Most common chess variant?

Post by Angrim »

yolin wrote:
Anyway, suicide chess is about to be solved as a win for white (only 1...b6 is not yet known to lose to 1.e3!).
Really? Impressive! Do you have a reference for this (or link?).

I know that ascp (from FICS) had solved some opening lines but thought that there was no progress since then.
http://magma.maths.usyd.edu.au/~watkins ... index.html

And yea, there was a long period of no progress. I ran into hardware limitations(512meg of ram mostly) a decade or so ago and stopped work on the opening, then got busy with other stuff. I keep thinking that I should get back to work on that, now that I have a bit better hardware :)
ps. glad to see that my program is still remembered after all these years. --Angrim, author of ascp
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Ferdy
Posts: 4833
Joined: Sun Aug 10, 2008 3:15 pm
Location: Philippines

Re: Most common chess variant?

Post by Ferdy »

Isaac wrote:I'm a huge fan of the crazyhouse variant, have you considered it?
Make some improvements in Imortal.

Test results at 5'+3" inc on 100 start pos from pgn. Side is reversed totaling 200 games per engine match. Some tests are not finished yet. The uploaded version supports multipv mode which I think is helpful in analysis.

Next I will implement include and exlude for winboard gui.

Code: Select all

Head to head statistics:

 1) Imortal v1-27           76.6 :    400 (+222,=7,-171),  56.4 %

    vs.                           :  games (   +, =,   -),   (%) :    Diff,    SD, CFS (%)
    TJchessWB_1.1_64bit_ZH        :    200 (  96, 4, 100),  49.0 :   +17.6,  12.6,   91.9
    Sunsetter 7e ZH               :    200 ( 126, 3,  71),  63.8 :   +74.8,  13.0,  100.0

 2) Imortal v1-25           75.8 :    462 (+254,=5,-203),  55.5 %

    vs.                           :  games (   +, =,   -),   (%) :    Diff,    SD, CFS (%)
    Imortal v1-32                 :     62 (  35, 1,  26),  57.3 :    +4.9,  19.9,   59.8
    TJchessWB_1.1_64bit_ZH        :    200 ( 103, 3,  94),  52.3 :   +16.8,  12.3,   91.4
    Sunsetter 7e ZH               :    200 ( 116, 1,  83),  58.3 :   +74.0,  12.7,  100.0

 3) Imortal v1-32           70.9 :    178 (+93,=4,-81),  53.4 %

    vs.                           :  games (  +, =,  -),   (%) :    Diff,    SD, CFS (%)
    Imortal v1-25                 :     62 ( 26, 1, 35),  42.7 :    -4.9,  19.9,   40.2
    TJchessWB_1.1_64bit_ZH        :     57 ( 31, 1, 25),  55.3 :   +11.9,  19.6,   72.8
    Sunsetter 7e ZH               :     59 ( 36, 2, 21),  62.7 :   +69.1,  19.7,  100.0

 4) TJchessWB_1.1_64bit_ZH  59.0 :   1550 (+806,=17,-727),  52.5 %

    vs.                           :  games (   +,  =,   -),   (%) :    Diff,    SD, CFS (%)
    Imortal v1-27                 :    200 ( 100,  4,  96),  51.0 :   -17.6,  12.6,    8.1
    Imortal v1-25                 :    200 (  94,  3, 103),  47.8 :   -16.8,  12.3,    8.6
    Imortal v1-32                 :     57 (  25,  1,  31),  44.7 :   -11.9,  19.6,   27.2
    Imortal v1-30                 :    164 (  81,  2,  81),  50.0 :    +3.6,  14.3,   60.0
    Imortal v1-24                 :    200 ( 100,  4,  96),  51.0 :    +6.1,  12.8,   68.2
    Imortal v1-28                 :    164 (  94,  1,  69),  57.6 :   +31.0,  14.7,   98.2
    Imortal v1-26                 :    158 (  81,  2,  75),  51.9 :   +33.3,  14.5,   98.9
    Sunsetter 7e ZH               :    200 ( 117,  0,  83),  58.5 :   +57.2,   8.5,  100.0
    Imortal v1.0                  :    185 ( 103,  0,  82),  55.7 :   +59.0,  13.5,  100.0
    Imortal v1-29                 :     22 (  11,  0,  11),  50.0 :   +70.7,  39.1,   96.5

 5) Imortal v1-30           55.4 :    329 (+174,=4,-151),  53.5 %

    vs.                           :  games (   +, =,   -),   (%) :    Diff,    SD, CFS (%)
    TJchessWB_1.1_64bit_ZH        :    164 (  81, 2,  81),  50.0 :    -3.6,  14.3,   40.0
    Sunsetter 7e ZH               :    165 (  93, 2,  70),  57.0 :   +53.6,  14.5,  100.0

 6) Imortal v1-24           53.0 :    400 (+209,=7,-184),  53.1 %

    vs.                           :  games (   +, =,   -),   (%) :    Diff,    SD, CFS (%)
    TJchessWB_1.1_64bit_ZH        :    200 (  96, 4, 100),  49.0 :    -6.1,  12.8,   31.8
    Sunsetter 7e ZH               :    200 ( 113, 3,  84),  57.3 :   +51.2,  13.1,  100.0

 7) Imortal v1-28           28.1 :    330 (+162,=4,-164),  49.7 %

    vs.                           :  games (   +, =,   -),   (%) :    Diff,    SD, CFS (%)
    TJchessWB_1.1_64bit_ZH        :    164 (  69, 1,  94),  42.4 :   -31.0,  14.7,    1.8
    Sunsetter 7e ZH               :    166 (  93, 3,  70),  56.9 :   +26.3,  14.5,   96.5

 8) Imortal v1-26           25.7 :    318 (+155,=4,-159),  49.4 %

    vs.                           :  games (   +, =,   -),   (%) :    Diff,    SD, CFS (%)
    TJchessWB_1.1_64bit_ZH        :    158 (  75, 2,  81),  48.1 :   -33.3,  14.5,    1.1
    Sunsetter 7e ZH               :    160 (  80, 2,  78),  50.6 :   +23.9,  14.2,   95.4

 9) Sunsetter 7e ZH          1.8 :   1557 (+670,=18,-869),  43.6 %

    vs.                           :  games (   +,  =,   -),   (%) :    Diff,    SD, CFS (%)
    Imortal v1-27                 :    200 (  71,  3, 126),  36.3 :   -74.8,  13.0,    0.0
    Imortal v1-25                 :    200 (  83,  1, 116),  41.8 :   -74.0,  12.7,    0.0
    Imortal v1-32                 :     59 (  21,  2,  36),  37.3 :   -69.1,  19.7,    0.0
    TJchessWB_1.1_64bit_ZH        :    200 (  83,  0, 117),  41.5 :   -57.2,   8.5,    0.0
    Imortal v1-30                 :    165 (  70,  2,  93),  43.0 :   -53.6,  14.5,    0.0
    Imortal v1-24                 :    200 (  84,  3, 113),  42.8 :   -51.2,  13.1,    0.0
    Imortal v1-28                 :    166 (  70,  3,  93),  43.1 :   -26.3,  14.5,    3.5
    Imortal v1-26                 :    160 (  78,  2,  80),  49.4 :   -23.9,  14.2,    4.6
    Imortal v1.0                  :    184 (  96,  2,  86),  52.7 :    +1.8,  13.7,   55.2
    Imortal v1-29                 :     23 (  14,  0,   9),  60.9 :   +13.4,  39.0,   63.4

  10 ?                            :Removed from calculation
11) Imortal v1.0             0.0 :    369 (+168,=2,-199),  45.8 %

    vs.                           :  games (   +, =,   -),   (%) :    Diff,    SD, CFS (%)
    TJchessWB_1.1_64bit_ZH        :    185 (  82, 0, 103),  44.3 :   -59.0,  13.5,    0.0
    Sunsetter 7e ZH               :    184 (  86, 2,  96),  47.3 :    -1.8,  13.7,   44.8

12) Imortal v1-29          -11.6 :     45 (+20,=0,-25),  44.4 %

    vs.                           :  games (  +, =,  -),   (%) :    Diff,    SD, CFS (%)
    TJchessWB_1.1_64bit_ZH        :     22 ( 11, 0, 11),  50.0 :   -70.7,  39.1,    3.5
    Sunsetter 7e ZH               :     23 (  9, 0, 14),  39.1 :   -13.4,  39.0,   36.6
Download:
http://www.mediafire.com/download/gdag7 ... _v1-27.rar
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