How do I program Chess game?

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thehorseman007

- luckyrawatlucky
- - Joined 27 Aug, 2015
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- 23 Dec, 2020
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is there anyone who can explain how to convert api's values into sprite positions.
- oosyrag
- - Joined 20 Feb, 2013
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- 23 Dec, 2020
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It looks like a simple 2d array.

The values within brackets [] indicate the rows, while commas separate the columns.

You can use tokenat or regex to find out what is at each position directly, or as soon mentioned try parsing it with the json object and reading the values with json expressions.
- luckyrawatlucky
- - Joined 27 Aug, 2015
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- 23 Dec, 2020
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I did test runtime.globalVars.textBoard = chess.board(); and it showed me

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
- luckyrawatlucky
- - Joined 27 Aug, 2015
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oosyrag I never used regex before and never know about it But I know tokenat method. can you little explain about json object and json expression. How I have to do with json
- dop2000
- - Joined 26 May, 2016
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- 23 Dec, 2020
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Merry Christmas!

dropbox.com/s/cjec2ns6c6ltd4k/ChessJS2.c3p
- luckyrawatlucky
- - Joined 27 Aug, 2015
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oh Thank you soo much & Merry Christmas to you too.
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- luckyrawatlucky
- - Joined 27 Aug, 2015
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- 23 Dec, 2020
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Can you do comments too in events it will make easy to understand.

Like I am not getting what's happening in UpdateBoard Functions.
- dop2000
- - Joined 26 May, 2016
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- 23 Dec, 2020
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Whoa, that's way too much coffee!! Thank you!

I added comments to the project, please re-download it:

dropbox.com/s/cjec2ns6c6ltd4k/ChessJS2.c3p
- luckyrawatlucky
- - Joined 27 Aug, 2015
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Thanks to you.

You helped me so many times I never can forget that.
- dop2000
- - Joined 26 May, 2016
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- 4 Jan, 2021
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luckyrawatlucky I posted a new version where you can move pieces with mouse:
howtoconstructdemos.com/chess-game
- luckyrawatlucky
- - Joined 27 Aug, 2015
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- 5 Jan, 2021
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Thanks

i can see this file in few weeks. I'm out of city
- luckyrawatlucky
- - Joined 27 Aug, 2015
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- 12 Jan, 2021
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What I should type in the textbox to move from b7 to a8 and promote it to Queen?
- dop2000
- - Joined 26 May, 2016
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- 12 Jan, 2021
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It uses Standard Algebraic Notation for moves. See this link:

en.wikipedia.org/wiki/Algebraic_notation_(chess)
- luckyrawatlucky
- - Joined 27 Aug, 2015
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- 12 Jan, 2021
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still I'm not sure what I should type there as I tried b7-a8Q, b7-a8=Q, b7-a8a8Q.
- dop2000
- - Joined 26 May, 2016
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- 13 Jan, 2021
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Please re-download the file:

dropbox.com/s/p5787hpljwxwcjc/ChessJS.c3p
Use string like b7-a8q to promote to a queen.

In my example I'm calling .move method with 3 parameters - from, to, promotion. There is another way to use it, by passing a string in Standard Algebraic Notation (SAN). In this case to promote a pawn you'll need to run a script like this:

chess.move('a8Q')