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Forum Index : Microcontroller and PC projects : CMM2: TSCP Chess
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| Bleep Guru  Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Have a look at your PMs :-) Regards Kevin. |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Volhout, I suspect we'll need to play around with these values to give the best game play, without exceeding the memory of the Pico, unfortunately I'm crap at Chess!! As for the bmp file, I'm actually on holiday at the moment (it's been raining on and off the last few days so I've been 'allowed' a few hours) so I don't have access to my usual image editing stuff, do you want to have a go at making them better? Hopefully we'll hear from Tom soon, in which case we can publish it, assuming he's ok with that. Regards Kevin. Edited 2022-10-02 05:27 by Bleep |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Volhout, I have sent you another PM. It may be possible to allow deeper searches as the game progresses, currently it seems to be only able to do 4 to begin with, but I have manually increased this to 5 & 6 as the game progressed and there were fewer pieces? Regards Kevin. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9084 |
PicoMiteVGA.zip Have a play with this version. This includes two new mm.info functions mm.info(stack) returns the current value of the C stack pointer mm.info(heap) returns the amount of MMBasic heap memory free In addition I have implemented stack checking in various places. An error will be thrown if the stack pointer goes below &H2003f800. If it does it hits the C heap which is used by the USB CDC code and after that hits some critical firmware variables hence the strange error messages you have seen All this demonstrated by Print factorial(100) Function factorial(n%) Print n%,Hex$(MM.Info(stack)),MM.Info(heap) If n%=1 Then factorial=1 Else factorial=factorial(n%-1) EndIf End Function Using the new diagnostics you should be able to tune the chess code to run within the limits of the PicoMite. NB: there is no way to increase the C stack allocation without reducing the MMbasic heap size (variable area) Edited 2022-10-02 18:11 by matherp |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Peter, Fantastic :-) thank you very much, we'll give it a spin, I'm on hols in Cornwall, so it may now be a while, I'm also waiting for the original writer of TSCP to give the ok for this version to be published. Regards Kevin. PS. I've just sent you a PM. Edited 2022-10-02 19:10 by Bleep |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9084 |
The sort of thing you need to think about is to simplify expressions into multiple statements. Look at the attached  |
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| bar1010 Senior Member  Joined: 10/08/2020 Location: United StatesPosts: 197 |
 Here is one position from my Chess 960 variant program. Just need to modify the castling code. Also am creating a Double Chess 960 version where White’s and Black’s initial setups can be different from each other to make 960 x 960 = 921,600 unique initial positions. |
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| bar1010 Senior Member Joined: 10/08/2020 Location: United StatesPosts: 197 |
 Here is my BMP file that will be using to display the board and pieces for three chess variants. The board squares will be 90x90 pixels. One board will have 10x8 = 80 squares, while another will have 12x8 = 96 squares. Screen resolution will be 1280x1024. |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Volhout, I have made a few changes to the code, see your PM. I still haven't heard from Tom, I've tried sending off another Email. I've been testing it by using a chess program on my tablet, the tablet usually wins. I am using Peters latest, which did seem to improve things in its on right. Regards Kevin. Edited 2022-10-03 16:36 by Bleep |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Volhout, While you are tuning, did you know you can probably use the 'bench' command, which runs a benchmark piece of code, which I assume exercises the code quite well. Using a depth of 5 search took about 30 mins and did not crash. If you look for a routine called 'bench' you can change the time limit or the depth limit, so you can do quicker runs to aid tuning. max_time=324e5 'in mS max_depth=5 Hope this helps. Regards Kevin. |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4213 |
Hi Kevin, I made some improvements, and added stack level and heap level to the screen. Have your code running for one hour (playing itself) and not problems. I will PM the code later today when I have more confidence (with your proposed changes). Stack levels and heap levels seem to leave 23k free (stack starting at 36k, heap at 26k). Volhout EDIT: correction, the C-stack is only 8.8k and often reaches 2k level... This is seriously close to crashing. But it keeps running with the levels you set. I will need to improve more.... Thanks Peter, for this tool.... Edited 2022-10-03 19:53 by Volhout PicomiteVGA PETSCII ROBOTS |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4213 |
 Still running (playing against itself) after 4 hours. Not even close to an end-game yet. All pieces are still on the board, except 2 pawns. This will take all night. Let's see where it is tomorrow. Probably need more horse power. Edited 2022-10-03 23:29 by Volhout PicomiteVGA PETSCII ROBOTS |
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Rickard5 Guru Joined: 31/03/2022 Location: United StatesPosts: 463 |
Volhout you sir are a Gentleman and a Genus, Chess on the Picomite is there anyway to move the board tor the left side of the screen and the game notation on the right ? but Chess on the PM OMG OMG OMG OMG I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4213 |
Hi Richard, Please understand this is mostly Kevin's (Bleep) and bar1010's work. And of coarse the heavy lifter Tom Kerrigan, who wrote the chess engine. I merely tune the code to minimize stack usage as to Peter's advise. The thinking is all on Kevin... Volhout Edited 2022-10-04 00:20 by Volhout PicomiteVGA PETSCII ROBOTS |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6760 |
It says just as much for MMBasic. A BASIC interpreter (not a compiler) being able to handle a chess program at all is something. :) The fact that the Pico (which is closer in most ways to a microcontroller than a SoC) can handle a fast BASIC interpreter is pretty cool too, of course. :) I, personally, first saw chess on a Nascom-2 (Z80) in about 1980ish. That was Sargon, but it was a machine code program. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9084 |
The person who did the MMbasic conversion from C with permission from Tom was Martin Round (ceptimus) everything else is derivative of his work. Martin was part of the team of testers of the CMM2 before its announcement and the chess port was a very useful test program. Edited 2022-10-04 00:58 by matherp |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4213 |
Thanks, I didn't know that .... ceptimus, thank you !! PicomiteVGA PETSCII ROBOTS |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi, yes, I claim no credit for converting it to MMBasic from C, other than getting the version from Bar1010 working on the Pico. The graphics are quite poor, simply a rescale of Bar1010 pieces, they need to be improved but I'm away from home at the moment. Question for Ceptimus or Bar or Peter, I have tried Emailing Tom Kerrigan several times now to ask for permission to publish a PicoMite version of Chess, this is on the Email from his website, but I've had no response, do you know of a better address? As you can see it's quiet slow, but may be ok for a casual player. I would think that if the original C could be compiled as a csub if that is even possible, with MMBasic providing the user interface it would then potentially give quite acceptable results. Regards Kevin Edited 2022-10-04 06:18 by Bleep |
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| Rickard5 Guru Joined: 31/03/2022 Location: United StatesPosts: 463 |
PLEASE NO the original Graphics are Wonderful!!!!!! the only thing is could the Game Notation be moved on the right and the board to the left? I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place |
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| bar1010 Senior Member Joined: 10/08/2020 Location: United StatesPosts: 197 |
Tom Kerrigan’s email address is tom.kerrigan@gmail.com He has responded to me, although sometimes it may take a day or two. He mentioned that he is currently on vacation. Does anyone have contact information for ceptimus? |
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