Cuteseal support

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Cuteseal support is intended for laggy network connections to

eliminate the network lag from move time. Cuteseal moves timing from

the cutechess server to the remote engine side of the network

connection. This is achieved by running the engine with

cuteseal-remote-runner, which adds timing info for all input and

output commands. Cutechess-cli then uses this timing info to calculate

move times correctly without the effect of the network lag.

Usage

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First, compile the cutechess remote runner:

cd cuteseal-remote-runner

./compile.sh

Then, to enable cuteseal support for a remote engine, launch is as

follows in engines.json:

"command": "<tceccutechess-path>/cuteseal-remote-runner/cuteseal-remote-runner stockfish",

Then, set cuteseal="true" in the cutechess-cli launch parameters. For

example:

-engine conf="Stockfish Cuteseal" tc="1+0.1" cuteseal="true"

This tells cutechess that the engine input/output uses cuteseal.

Run cuteseal-remote-runner without parameters for a usage and

explanation on the cuteseal protocol layer.

You can also launch the engine with cuteseal-remote-runner on your

console, as you'd do with any other engine:

./cuteseal-remote-runner stockfish

You can then send the usual commands such as 'uci' and 'go

infinite'. Or try:

./cuteseal-remote-runner stockfish bench

Cuteseal has one extra input command prefix that sets a timeout for

the engine to send the 'bestmove' command. This is:

cuteseal-deadline <ns> <command ...>

For example:

cuteseal-deadline 1100000000 go movetime 1000

to ensure that bestmove is received within 1.1 sec. If not, a "STATUS

TIMEOUT" message will be sent back to inform that the engine did not

respond in time. Receiving this message triggers the Cutechess server

to immediately forfeit the game due to timeout.