added Connect Four challenge

Author: imattman

07-connect-four/README.md

@@ -0,0 +1,17 @@
+# Challenge: Connect Four Game
+
+Code an implementation of the game _Connect Four_ that can be played by 2 players.
+
+[Video description][youtube] of Connect Four
+
+From [Wikipedia][wikipedia]:
+> Connect Four is a two-player connection game in which the players first choose a color and then take turns dropping one colored disc from the top into a seven-column, six-row vertically suspended grid. The pieces fall straight down, occupying the lowest available space within the column. The objective of the game is to be the first to form a horizontal, vertical, or diagonal line of four of one's own discs. Connect Four is a solved game. The first player can always win by playing the right moves.
+
+If you are feeling ambitious you can also support single player mode where the player competes against the computer.
+
+Try to decouple the game logic from UI presentation so that different UI implementations can connected.
+
+A simple non-graphical user interface that executes in a terminal is sufficient for this challenge.
+
+[wikipedia]: https://en.wikipedia.org/wiki/Connect_Four
+[youtube]: https://www.youtube.com/watch?v=utXzIFEVPjA

README.md

@@ -9,6 +9,7 @@ These are some additional coding challenges to sharpen your Python programming s
 0. [Shakespeare Word Frequency](https://github.com/PDXPythonPirates/code-challenges/blob/master/04-shakespeare-frequency/)
 0. [Bowling Scores](https://github.com/PDXPythonPirates/code-challenges/tree/master/05-bowling-scores/)
 0. [A Grep Clone](https://github.com/PDXPythonPirates/code-challenges/tree/master/06-pygrep/)
+0. [Connect Four](https://github.com/PDXPythonPirates/code-challenges/tree/master/07-connect-four/)
 
 
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