Stockfish 13 on PicoChess v201plus

[John Paul Parkins]

Hi there, 

Thanks for all the information that is posted in this group. 

I wanted to pick somebody's brains and ask if anybody knows why I cannot get Stockfish 13 on PicoChess v201plus (installed from img) working on a Pi3 v1.2

I have followed the instructions hear: (Thanks Al)

https://groups.google.com/g/picochess/c/QZQmfl55qtg

All all seems straight forward, for some reason Pico Chess does not seem to start correctly. I have reverted back to Stockfish 8 (took a copy of it before overwriting it with Stockfish 13) which has bought things back to life.

Thanks

JP

[RandyR]

Hi JP,

Are you able to run stockfish by itself:

sudo service picochess stop

cd /opt/picochess/engines/armv7l

sudo ./a-stockf

If it runs (and says it is Stockfish 13), type:

go movetime 10000

Still good?

If it doesn't run, what is the error?

Randy

[John Paul Parkins]

Hi Randy, 

I am getting the error

pi@picochess:/opt/picochess/engines/armv7l $ sudo ./a-stockf

./a-stockf: /usr/lib/arm-linux-gnueabihf/libstdc++.so.6: version `CXXABI_1.3.11'                                                  not found (required by ./a-stockf)

Thanks

JP

[Randy Reade]

Hi JP,

It looks like it was compiled for a later version of GLIBC than what exists on the image you used. Are you able to use a v3 image?

Randy

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[John Paul Parkins]

Hi Randy,

Was just thinking that after your advice.

I would use v3 image if I knew where to get it from, I must have missed.

Thanks. 

JP 

[RandyR]

Hi JP,

Have a look at this thread. The links are valid but the sizes mentioned may be slightly different. The attachments, included in the image archives, explain the differences between the 2 images. The other option would be to compile SF13 using the image that you have, but you would miss out on all of Dirk's enhancements.

Randy

[John Paul Parkins]

Randy, 

Thanks for that. 

I did trying compiling from source code but ran into other errors while using this:

make build ARCH=armv7

I will try v3 image as it make sense not to miss out on the enhancements.

JP

[RandyR]

This might work, but I'm not near my Pi:

make -j2 profile-build ARCH=armv7 LDFLAGS="-latomic -lpthread -lgcov"

Randy

[John Paul Parkins]

Randy, 

All up and running with new image.

Will give

make -j2 profile-build ARCH=armv7 LDFLAGS="-latomic -lpthread -lgcov"

a go at some point, I am interested to see if it compiles ok.

Take care and thanks

[Scally]

Hi JP,

One of the many good things about this forum is that we are from different time zones. 

Whilst I was sleeping Randy in the USA could reply, now that I’m awake in the UK and Randy is asleep, I can reply.

Your former problem was probably due to the fact that v2.01 was still using Raspbian Stretch, we are now using Raspbian Buster aka Raspberry Pi OS & my compile was done on Buster.

This command will tell you which OS you are using:

sudo lsb_release -a

I see now that you are using Randy’s latest images which are Buster, therefor my compile would now work, however my compiled engines are in Randy’s images anyway.

a-stockf is configured to not use NNUE, but there is a NNUE version in the NNUE folders, however you could change the a-stockf.uci to use NNUE should you so wish, as long as the NNUE file is present.

Cheers,

Al.

[John Paul Parkins]

Al,

Based in London, that explains why Randy was able to help.

Really enjoying PicoChess, thanks for the support. Really appreciate the community.

Found the flag to enable NNUE in a-stockf.uci - Looking forward to seeing this work.

Cheers 

JP

[RandyR]

I'm actually in Canada. :^)

Randy

[Scally]

Sorry Randy,

Same / similar time zone … 😀

Al.