Add as command line tool

README.md

@@ -2,6 +2,60 @@
 
 Goal: Generate 'hard' puzzles.
 
+## Install
+
+- Install Rust from [here](https://www.rust-lang.org/tools/install).
+- Run `cargo install --git https://github.com/cool-mist/sol_chess` to install the tool.
+- Run `sol_chess --help` to see the options.
+
+## Usage
+
+- Generate a puzzle
+
+```bash
+$ sol_chess -g -n 6
+Generated a puzzle with 6 pieces after 330 ms
+PP..
+..PB
+.K..
+.N..
+```
+
+- Solve a puzzle
+
+```bash
+$ sol_chess -- --solve PP....PB.K...N..
+PP..
+..PB
+.K..
+.N..
+
+Found 1 solutions
+1. Nb1 -> c3
+2. Nc3 -> a4
+3. Na4 -> b2
+4. Nb2 -> d3
+5. Nd3 -> b4
+```
+
+- Generate and solve a puzzle
+
+```bash
+$ sol_chess -g -n 6 --print
+Generated a puzzle with 6 pieces after 933 ms
+.P.N
+B.R.
+.K..
+..N.
+
+Found 1 solutions
+1. Ba3 -> b4
+2. Bb4 -> c3
+3. Bc3 -> d4
+4. Bd4 -> b2
+5. Bb2 -> c1
+```
+
 ## Heuristics of current algorithm
 
 1. About 6-7 pieces on the board.