diff --git a/container/Dockerfile b/container/Dockerfile
index 8c5a763..6c9cc3f 100644
--- a/container/Dockerfile
+++ b/container/Dockerfile
@@ -6,9 +6,14 @@ RUN apk add \
         --update \
         autoconf \
         g++ \
-        make \
-    && pecl install \
-        xdebug-2.7.2
+        make
+
+ADD xdebug-2.7.2.tgz /
+RUN cd /xdebug-2.7.2 \
+    && phpize \
+    && ./configure --enable-xdebug \
+    && make \
+    && make install
 
 # done, copy binaries from build stage
 FROM php:7.0-cli-alpine as final
@@ -16,5 +21,4 @@ LABEL maintainer="andre.rademacher.business@googlemail.com"
 COPY --from=build /usr/local/lib/php/extensions/no-debug-non-zts-20151012/xdebug.so /usr/local/lib/php/extensions/no-debug-non-zts-20151012/xdebug.so
 COPY xdebug.ini /usr/local/etc/php/conf.d/xdebug.ini
 COPY --from=composer/composer:2.2-bin /composer /usr/local/bin/composer
-USER 1000
 WORKDIR /codewars/php70
diff --git a/container/xdebug-2.7.2.tgz b/container/xdebug-2.7.2.tgz
new file mode 100644
index 0000000..c128d4d
Binary files /dev/null and b/container/xdebug-2.7.2.tgz differ
diff --git a/kata/RomanNumeralsDecoder/Instructions.md b/kata/RomanNumeralsDecoder/README.md
similarity index 100%
rename from kata/RomanNumeralsDecoder/Instructions.md
rename to kata/RomanNumeralsDecoder/README.md
diff --git a/kata/SnakesAndLadders/README.md b/kata/SnakesAndLadders/README.md
new file mode 100644
index 0000000..af4457f
--- /dev/null
+++ b/kata/SnakesAndLadders/README.md
@@ -0,0 +1,54 @@
+# Snakes and ladders
+
+## Introduction
+Snakes and Ladders is an ancient Indian board game regarded today as a worldwide classic.
+It is played between two or more players on a gameboard having numbered, gridded squares.
+A number of "ladders" and "snakes" are pictured on the board,
+each connecting two specific board squares. (Source Wikipedia)
+
+## Task
+
+Your task is to make a simple class called SnakesLadders.
+The test cases will call the method play(die1, die2)
+independantly of the state of the game or the player turn.
+The variables die1 and die2 are the die thrown in a turn
+and are both integers between 1 and 6.
+The player will move the sum of die1 and die2.
+
+## The board
+
+![board.jpg](board.jpg)
+
+## Rules
+
+1.  There are two players and both start off the board on square 0.
+2.  Player 1 starts and alternates with player 2.
+3.  You follow the numbers up the board in order 1=>100.
+4.  If the value of both die are the same then that player will have another go.
+5.  Climb up ladders.
+    The ladders on the game board allow you to move upwards and get ahead faster.
+    If you land exactly on a square that shows an image of the bottom of a ladder,
+    then you may move the player all the way up to the square at the top of the ladder
+    (even if you roll a double).
+6.  Slide down snakes.
+    Snakes move you back on the board because you have to slide down them.
+    If you land exactly at the top of a snake, slide move the player all the way
+    to the square at the bottom of the snake or chute (even if you roll a double).
+7.  Land exactly on the last square to win.
+    The first person to reach the highest square on the board wins.
+    But there's a twist! If you roll too high, your player "bounces" off the last square
+    and moves back. You can only win by rolling the exact number needed to land
+    on the last square. For example, if you are on square 98 and roll a five,
+    move your game piece to 100 (two moves), then "bounce" back to 99, 98, 97 (three, four then five moves).
+8.  If the Player rolled a double and lands on the finish square “100”
+    without any remaining moves then the Player wins the game and does not have to roll again.
+
+## Returns
+
+- Return `Player n Wins!`.
+  Where n is winning player that has landed on square 100 without any remainding moves left.
+- Return `Game over!` if a player has won and another player tries to play.
+- Otherwise, return `Player n is on square x`.
+  Where n is the current player and x is the sqaure they are currently on.
+
+[See this kata in Codewars](https://www.codewars.com/kata/587136ba2eefcb92a9000027)
diff --git a/kata/SnakesAndLadders/SnakesLadders.php b/kata/SnakesAndLadders/SnakesLadders.php
new file mode 100644
index 0000000..c661847
--- /dev/null
+++ b/kata/SnakesAndLadders/SnakesLadders.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kata\SnakesAndLadders;
+
+final class SnakesLadders
+{
+    public function __construct()
+    {
+
+    }
+
+    public function play(int $die1, int $die2): string
+    {
+        return '';
+    }
+}
\ No newline at end of file
diff --git a/kata/SnakesAndLadders/SnakesLaddersTest.php b/kata/SnakesAndLadders/SnakesLaddersTest.php
new file mode 100644
index 0000000..f0d04bd
--- /dev/null
+++ b/kata/SnakesAndLadders/SnakesLaddersTest.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kata\SnakesAndLadders;
+
+use Generator;
+use PHPUnit\Framework\TestCase;
+
+final class SnakesLaddersTest extends TestCase
+{
+    /**
+     * @dataProvider providePlay
+     */
+    public function testPlay(array $expectedOutput, array $diceThrows)
+    {
+        $game = new SnakesLadders();
+        foreach ($diceThrows as $key => $diceThrow) {
+            self::assertSame($expectedOutput[$key], $game->play(...$diceThrow));
+        }
+    }
+
+    public function providePlay(): Generator
+    {
+        yield 'Player 1 just throws 1 & 1' => [
+            [
+                'Player 1 is on square 38',
+            ],
+            [
+                [1, 1],
+            ]
+        ];
+    }
+}
\ No newline at end of file
diff --git a/kata/SnakesAndLadders/board.jpg b/kata/SnakesAndLadders/board.jpg
new file mode 100644
index 0000000..20032e3
Binary files /dev/null and b/kata/SnakesAndLadders/board.jpg differ
diff --git a/kata/TicTacToeChecker/Instructions.md b/kata/TicTacToeChecker/README.md
similarity index 100%
rename from kata/TicTacToeChecker/Instructions.md
rename to kata/TicTacToeChecker/README.md