• A TIL experience

    From pepstein5@gmail.com@21:1/5 to All on Sun Sep 18 08:56:50 2022
    In a money game with XG, we both started with 31.
    But then XG surprised me quite a bit with 13/8 24/21.
    I thought making the 3 point was automatic.

    TIL something about opening theory.

    Paul

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  • From Timothy Chow@21:1/5 to peps...@gmail.com on Mon Sep 19 07:59:24 2022
    On 9/18/2022 11:56 AM, peps...@gmail.com wrote:
    In a money game with XG, we both started with 31.
    But then XG surprised me quite a bit with 13/8 24/21.
    I thought making the 3 point was automatic.

    TIL something about opening theory.

    It took me a while to understand what you were saying.

    XG rolled 31, and played 8/5 6/5.
    You rolled 31, and played 8/5 6/5.
    Then XG rolled 53, and played 13/8 24/21.

    Making the 3pt is no longer automatic when doing so
    breaks your 8pt. XG would have played 13/8 24/21 even
    if its first roll had been 42 (played 8/4 6/4 of course).

    ---
    Tim Chow

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  • From Timothy Chow@21:1/5 to Timothy Chow on Mon Sep 19 08:06:06 2022
    On 9/19/2022 7:59 AM, Timothy Chow wrote:
    On 9/18/2022 11:56 AM, peps...@gmail.com wrote:
    In a money game with XG, we both started with 31.
    But then XG surprised me quite a bit with 13/8 24/21.
    I thought making the 3 point was automatic.

    TIL something about opening theory.

    It took me a while to understand what you were saying.

    XG rolled 31, and played 8/5 6/5.
    You rolled 31, and played 8/5 6/5.
    Then XG rolled 53, and played 13/8 24/21.

    Making the 3pt is no longer automatic when doing so
    breaks your 8pt.  XG would have played 13/8 24/21 even
    if its first roll had been 42 (played 8/4 6/4 of course).

    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    ---
    Tim Chow

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  • From pepstein5@gmail.com@21:1/5 to Tim Chow on Mon Sep 19 07:38:08 2022
    On Monday, September 19, 2022 at 1:06:08 PM UTC+1, Tim Chow wrote:
    On 9/19/2022 7:59 AM, Timothy Chow wrote:
    On 9/18/2022 11:56 AM, peps...@gmail.com wrote:
    In a money game with XG, we both started with 31.
    But then XG surprised me quite a bit with 13/8 24/21.
    I thought making the 3 point was automatic.

    TIL something about opening theory.

    It took me a while to understand what you were saying.

    XG rolled 31, and played 8/5 6/5.
    You rolled 31, and played 8/5 6/5.
    Then XG rolled 53, and played 13/8 24/21.

    Making the 3pt is no longer automatic when doing so
    breaks your 8pt. XG would have played 13/8 24/21 even
    if its first roll had been 42 (played 8/4 6/4 of course).
    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    Interesting analysis. Thanks for this.

    Paul

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  • From pepstein5@gmail.com@21:1/5 to Tim Chow on Mon Sep 19 07:37:43 2022
    On Monday, September 19, 2022 at 12:59:27 PM UTC+1, Tim Chow wrote:
    On 9/18/2022 11:56 AM, peps...@gmail.com wrote:
    In a money game with XG, we both started with 31.
    But then XG surprised me quite a bit with 13/8 24/21.
    I thought making the 3 point was automatic.

    TIL something about opening theory.
    It took me a while to understand what you were saying.
    ...
    I deliberately left out some info that would normally be left in,
    feeling that that was ok since no ambiguity is created.
    For players at my and XG's level, 31 can only be played one way.
    And 13/8 24/21 reveals the roll, so no need to state it.

    Sometimes the checker play reveals the roll and sometimes not.

    Paul

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  • From Stick Rice@21:1/5 to Tim Chow on Mon Sep 19 14:06:55 2022
    On Monday, September 19, 2022 at 8:06:08 AM UTC-4, Tim Chow wrote:
    On 9/19/2022 7:59 AM, Timothy Chow wrote:
    On 9/18/2022 11:56 AM, peps...@gmail.com wrote:
    In a money game with XG, we both started with 31.
    But then XG surprised me quite a bit with 13/8 24/21.
    I thought making the 3 point was automatic.

    TIL something about opening theory.

    It took me a while to understand what you were saying.

    XG rolled 31, and played 8/5 6/5.
    You rolled 31, and played 8/5 6/5.
    Then XG rolled 53, and played 13/8 24/21.

    Making the 3pt is no longer automatic when doing so
    breaks your 8pt. XG would have played 13/8 24/21 even
    if its first roll had been 42 (played 8/4 6/4 of course).
    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    ---
    Tim Chow

    XG plays that according to its rollouts. If you're actually playing XG on 3 ply it does not make that play.

    Stick

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  • From Timothy Chow@21:1/5 to Stick Rice on Mon Sep 19 19:54:26 2022
    On 9/19/2022 5:06 PM, Stick Rice wrote:
    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    ---
    Tim Chow

    XG plays that according to its rollouts. If you're actually playing XG on 3 ply it does not make that play.

    Just now I set up the position after an opening 8/5 6/5, gave the
    opponent snake eyes to play (Jacoby/Beaver), went to "Setup" and
    chose "Play from position..." and selected the default player
    eXtremeGammon. It played 24/22 6/5(2).

    Does that not happen for you?

    ---
    Tim Chow

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  • From Timothy Chow@21:1/5 to peps...@gmail.com on Mon Sep 19 19:56:51 2022
    On 9/19/2022 10:37 AM, peps...@gmail.com wrote:
    On Monday, September 19, 2022 at 12:59:27 PM UTC+1, Tim Chow wrote:
    On 9/18/2022 11:56 AM, peps...@gmail.com wrote:
    In a money game with XG, we both started with 31.
    But then XG surprised me quite a bit with 13/8 24/21.
    I thought making the 3 point was automatic.

    TIL something about opening theory.
    It took me a while to understand what you were saying.
    ...
    I deliberately left out some info that would normally be left in,
    feeling that that was ok since no ambiguity is created.
    For players at my and XG's level, 31 can only be played one way.
    And 13/8 24/21 reveals the roll, so no need to state it.

    Sometimes the checker play reveals the roll and sometimes not.

    Yes; however, the lack of redundancy means that there's no error
    correction. At first I thought there was a typo and you meant to
    type 53 instead of 31, and you were talking about the 2nd roll of
    the game rather than the 3rd roll of the game.

    ---
    Tim Chow

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  • From Stick Rice@21:1/5 to Tim Chow on Tue Sep 20 17:35:30 2022
    On Monday, September 19, 2022 at 7:54:28 PM UTC-4, Tim Chow wrote:
    On 9/19/2022 5:06 PM, Stick Rice wrote:
    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    ---
    Tim Chow

    XG plays that according to its rollouts. If you're actually playing XG on 3 ply it does not make that play.
    Just now I set up the position after an opening 8/5 6/5, gave the
    opponent snake eyes to play (Jacoby/Beaver), went to "Setup" and
    chose "Play from position..." and selected the default player
    eXtremeGammon. It played 24/22 6/5(2).

    Does that not happen for you?

    ---
    Tim Chow

    Is the analysis of that move on 3 ply?

    Stick

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  • From Timothy Chow@21:1/5 to Stick Rice on Tue Sep 20 22:20:37 2022
    On 9/20/2022 8:35 PM, Stick Rice wrote:
    On Monday, September 19, 2022 at 7:54:28 PM UTC-4, Tim Chow wrote:
    On 9/19/2022 5:06 PM, Stick Rice wrote:
    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    ---
    Tim Chow

    XG plays that according to its rollouts. If you're actually playing XG on 3 ply it does not make that play.
    Just now I set up the position after an opening 8/5 6/5, gave the
    opponent snake eyes to play (Jacoby/Beaver), went to "Setup" and
    chose "Play from position..." and selected the default player
    eXtremeGammon. It played 24/22 6/5(2).

    Does that not happen for you?

    ---
    Tim Chow

    Is the analysis of that move on 3 ply?

    Yes, the default player eXtremeGammon operates on 3-ply.

    ---
    Tim Chow

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  • From Stick Rice@21:1/5 to Tim Chow on Wed Sep 21 20:07:43 2022
    On Tuesday, September 20, 2022 at 10:20:39 PM UTC-4, Tim Chow wrote:
    On 9/20/2022 8:35 PM, Stick Rice wrote:
    On Monday, September 19, 2022 at 7:54:28 PM UTC-4, Tim Chow wrote:
    On 9/19/2022 5:06 PM, Stick Rice wrote:
    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    ---
    Tim Chow

    XG plays that according to its rollouts. If you're actually playing XG on 3 ply it does not make that play.
    Just now I set up the position after an opening 8/5 6/5, gave the
    opponent snake eyes to play (Jacoby/Beaver), went to "Setup" and
    chose "Play from position..." and selected the default player
    eXtremeGammon. It played 24/22 6/5(2).

    Does that not happen for you?

    ---
    Tim Chow

    Is the analysis of that move on 3 ply?
    Yes, the default player eXtremeGammon operates on 3-ply.

    ---
    Tim Chow

    Are you sure? When I do the exact thing you say you're doing it plays 7(2) 5(2) (default player eXtremeGammon). For me, this is 4 ply. When I force it back down to 3 ply it still makes the same play. Maybe your version plays differently than mine or
    you could have the rollouts toggled on.

    Stick

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  • From Stick Rice@21:1/5 to Tim Chow on Wed Sep 21 20:05:47 2022
    On Tuesday, September 20, 2022 at 10:20:39 PM UTC-4, Tim Chow wrote:
    On 9/20/2022 8:35 PM, Stick Rice wrote:
    On Monday, September 19, 2022 at 7:54:28 PM UTC-4, Tim Chow wrote:
    On 9/19/2022 5:06 PM, Stick Rice wrote:
    Oh, another comment is that once your opponent has played
    8/5 6/5, you have a greater incentive to split, in order
    to avoid getting primed. A broken three-prime might not
    look terribly threatening, but for example, it's enough to
    make XG play 24/22 6/5(2) with snake eyes if you open the
    game with 8/5 6/5.

    ---
    Tim Chow

    XG plays that according to its rollouts. If you're actually playing XG on 3 ply it does not make that play.
    Just now I set up the position after an opening 8/5 6/5, gave the
    opponent snake eyes to play (Jacoby/Beaver), went to "Setup" and
    chose "Play from position..." and selected the default player
    eXtremeGammon. It played 24/22 6/5(2).

    Does that not happen for you?

    ---
    Tim Chow

    Is the analysis of that move on 3 ply?
    Yes, the default player eXtremeGammon operates on 3-ply.

    ---
    Tim Chow

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  • From Timothy Chow@21:1/5 to Stick Rice on Thu Sep 22 07:47:10 2022
    On 9/21/2022 11:07 PM, Stick Rice wrote:
    Are you sure? When I do the exact thing you say you're doing it plays 7(2) 5(2) (default player eXtremeGammon). For me, this is 4 ply. When I force it back down to 3 ply it still makes the same play. Maybe your version plays differently than mine
    or you could have the rollouts toggled on.

    The opening book rollouts sounds like the most plausible
    explanation, but I hunted around a bit and didn't see how
    to toggle them off?

    ---
    Tim Chow

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  • From Stick Rice@21:1/5 to Tim Chow on Thu Sep 22 17:13:35 2022
    On Thursday, September 22, 2022 at 7:47:11 AM UTC-4, Tim Chow wrote:
    On 9/21/2022 11:07 PM, Stick Rice wrote:
    Are you sure? When I do the exact thing you say you're doing it plays 7(2) 5(2) (default player eXtremeGammon). For me, this is 4 ply. When I force it back down to 3 ply it still makes the same play. Maybe your version plays differently than mine or
    you could have the rollouts toggled on.
    The opening book rollouts sounds like the most plausible
    explanation, but I hunted around a bit and didn't see how
    to toggle them off?

    ---
    Tim Chow

    Options >> Settings >> Analysis >> Use Opening Book/Do not roll Opening book moves

    Stick

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  • From Timothy Chow@21:1/5 to Stick Rice on Thu Sep 22 21:45:33 2022
    On 9/22/2022 8:13 PM, Stick Rice wrote:
    On Thursday, September 22, 2022 at 7:47:11 AM UTC-4, Tim Chow wrote:
    On 9/21/2022 11:07 PM, Stick Rice wrote:
    Are you sure? When I do the exact thing you say you're doing it plays 7(2) 5(2) (default player eXtremeGammon). For me, this is 4 ply. When I force it back down to 3 ply it still makes the same play. Maybe your version plays differently than mine or
    you could have the rollouts toggled on.
    The opening book rollouts sounds like the most plausible
    explanation, but I hunted around a bit and didn't see how
    to toggle them off?

    ---
    Tim Chow

    Options >> Settings >> Analysis >> Use Opening Book/Do not roll Opening book moves

    Yes, that did it, thanks! Specifically, unchecking "Use Opening Book"
    caused it to play 8/7(2) 6/5(2).

    Quite appropriate that I learned this in the "TIL" thread.

    ---
    Tim Chow

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