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# ctak, ctaklm, and ct1986
## Overview
1. ctak is a C library for the game of Tak
2. ctaklm is a line-mode interface to ctak and a computer opponent (for 5x5)
3. ct1986 is a similar interface, but designed for a Raspberry Pi Zero running buildroot and displaying output on a character LCD.
4. cttei is a TEI-speaking game engine for use wherever TEI is accepted.
5. geminict is a special adaptation of ctak for use in a gemini CGI web-server.
## Building for the native platform
make native
## Building for the Raspberry Pi Zero
Download and extract a recent version of buildroot into the working directory. Edit `BUILDROOT_DIR=buildroot-2020.11.1` in `Makefile` to point to the extracted directory.
make pi
## The computer opponent
Standard adversarial tree search (α-β negamax) with iterative deepening, using a neural network evaluation function for leaves and also a transposition table keyed on the Zobrist hash.
The architecture of the neural network is a standard, two-layer dense network which is trained exclusively through self-play using td-leaf (see `src/nn_train.py`). As input the network is fed the top layer of the board only as well as `flats used/flats remaining` fractions for both players and a single float indicating the parity of the board.
## License
GPLv3+
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