diff --git a/.php_cs b/.php_cs
index 9048226..3357476 100644
--- a/.php_cs
+++ b/.php_cs
@@ -1,12 +1,5 @@
 <?php
 
-$header = <<<'EOF'
-This file is part of <package name>.
-
-This source file is subject to the license that is bundled
-with this source code in the file LICENSE.
-EOF;
-
 $finder = PhpCsFixer\Finder::create()
     ->exclude(['build', 'vendor'])
     ->in(__DIR__);
@@ -15,10 +8,5 @@ return PhpCsFixer\Config::create()
     ->setFinder($finder)
     ->setUsingCache(true)
     ->setRules([
-        '@Symfony' => true,
-        'header_comment' => ['header' => $header],
-        'phpdoc_align' => false,
-        'phpdoc_order' => true,
-        'ordered_imports' => true,
-        'array_syntax' => ['syntax' => 'short'],
+        '@PSR2' => true,
     ]);
diff --git a/composer.json b/composer.json
index a8ff659..9d8b9b7 100644
--- a/composer.json
+++ b/composer.json
@@ -1,10 +1,10 @@
 {
-    "name": "kreait/php-boilerplate",
-    "description": "A boilerplate for new composer based PHP projects.",
-    "keywords": ["boilerplate", "skeleton"],
+    "name": "jeroened/libpairtwo",
+    "description": "PHP library that reads and writes SWS files from Pairtwo developed by the Belgian Chess Federation",
+    "keywords": ["chess", "frbe-kbsb", "pairtwo"],
     "license": "MIT",
     "require": {
-        "php": "^7.2"
+        "php": "^7.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.0",
@@ -22,7 +22,7 @@
     },
     "config": {
         "platform": {
-            "php": "7.2"
+            "php": "7.1"
         },
         "sort-packages": true
     }
diff --git a/composer.lock b/composer.lock
index b69daf0..df41d74 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "582063405dcaa8146cb075397cd40df8",
+    "content-hash": "3d66937902d1eb5c80860d84bfa73d5b",
     "packages": [],
     "packages-dev": [
         {
@@ -291,16 +291,16 @@
         },
         {
             "name": "friendsofphp/php-cs-fixer",
-            "version": "v2.13.1",
+            "version": "v2.14.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/FriendsOfPHP/PHP-CS-Fixer.git",
-                "reference": "54814c62d5beef3ba55297b9b3186ed8b8a1b161"
+                "reference": "b788ea0af899cedc8114dca7db119c93b6685da2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/54814c62d5beef3ba55297b9b3186ed8b8a1b161",
-                "reference": "54814c62d5beef3ba55297b9b3186ed8b8a1b161",
+                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/b788ea0af899cedc8114dca7db119c93b6685da2",
+                "reference": "b788ea0af899cedc8114dca7db119c93b6685da2",
                 "shasum": ""
             },
             "require": {
@@ -309,7 +309,7 @@
                 "doctrine/annotations": "^1.2",
                 "ext-json": "*",
                 "ext-tokenizer": "*",
-                "php": "^5.6 || >=7.0 <7.3",
+                "php": "^5.6 || ^7.0",
                 "php-cs-fixer/diff": "^1.3",
                 "symfony/console": "^3.4.17 || ^4.1.6",
                 "symfony/event-dispatcher": "^3.0 || ^4.0",
@@ -327,7 +327,7 @@
             "require-dev": {
                 "johnkary/phpunit-speedtrap": "^1.1 || ^2.0 || ^3.0",
                 "justinrainbow/json-schema": "^5.0",
-                "keradus/cli-executor": "^1.1",
+                "keradus/cli-executor": "^1.2",
                 "mikey179/vfsstream": "^1.6",
                 "php-coveralls/php-coveralls": "^2.1",
                 "php-cs-fixer/accessible-object": "^1.0",
@@ -347,6 +347,11 @@
                 "php-cs-fixer"
             ],
             "type": "application",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.14-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
                     "PhpCsFixer\\": "src/"
@@ -378,7 +383,7 @@
                 }
             ],
             "description": "A tool to automatically fix PHP code style",
-            "time": "2018-10-21T00:32:10+00:00"
+            "time": "2019-01-04T18:29:47+00:00"
         },
         {
             "name": "myclabs/deep-copy",
@@ -1789,21 +1794,21 @@
         },
         {
             "name": "symfony/console",
-            "version": "v4.2.1",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "4dff24e5d01e713818805c1862d2e3f901ee7dd0"
+                "reference": "a700b874d3692bc8342199adfb6d3b99f62cc61a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/4dff24e5d01e713818805c1862d2e3f901ee7dd0",
-                "reference": "4dff24e5d01e713818805c1862d2e3f901ee7dd0",
+                "url": "https://api.github.com/repos/symfony/console/zipball/a700b874d3692bc8342199adfb6d3b99f62cc61a",
+                "reference": "a700b874d3692bc8342199adfb6d3b99f62cc61a",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
-                "symfony/contracts": "^1.0",
+                "php": "^5.5.9|>=7.0.8",
+                "symfony/debug": "~2.8|~3.0|~4.0",
                 "symfony/polyfill-mbstring": "~1.0"
             },
             "conflict": {
@@ -1812,11 +1817,11 @@
             },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~3.4|~4.0",
+                "symfony/config": "~3.3|~4.0",
                 "symfony/dependency-injection": "~3.4|~4.0",
-                "symfony/event-dispatcher": "~3.4|~4.0",
+                "symfony/event-dispatcher": "~2.8|~3.0|~4.0",
                 "symfony/lock": "~3.4|~4.0",
-                "symfony/process": "~3.4|~4.0"
+                "symfony/process": "~3.3|~4.0"
             },
             "suggest": {
                 "psr/log-implementation": "For using the console logger",
@@ -1827,7 +1832,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -1854,48 +1859,44 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2018-11-27T07:40:44+00:00"
+            "time": "2019-01-04T04:42:43+00:00"
         },
         {
-            "name": "symfony/contracts",
-            "version": "v1.0.2",
+            "name": "symfony/debug",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/contracts.git",
-                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf"
+                "url": "https://github.com/symfony/debug.git",
+                "reference": "26d7f23b9bd0b93bee5583e4d6ca5cb1ab31b186"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/contracts/zipball/1aa7ab2429c3d594dd70689604b5cf7421254cdf",
-                "reference": "1aa7ab2429c3d594dd70689604b5cf7421254cdf",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/26d7f23b9bd0b93bee5583e4d6ca5cb1ab31b186",
+                "reference": "26d7f23b9bd0b93bee5583e4d6ca5cb1ab31b186",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": "^5.5.9|>=7.0.8",
+                "psr/log": "~1.0"
+            },
+            "conflict": {
+                "symfony/http-kernel": ">=2.3,<2.3.24|~2.4.0|>=2.5,<2.5.9|>=2.6,<2.6.2"
             },
             "require-dev": {
-                "psr/cache": "^1.0",
-                "psr/container": "^1.0"
-            },
-            "suggest": {
-                "psr/cache": "When using the Cache contracts",
-                "psr/container": "When using the Service contracts",
-                "symfony/cache-contracts-implementation": "",
-                "symfony/service-contracts-implementation": "",
-                "symfony/translation-contracts-implementation": ""
+                "symfony/http-kernel": "~2.8|~3.0|~4.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Contracts\\": ""
+                    "Symfony\\Component\\Debug\\": ""
                 },
                 "exclude-from-classmap": [
-                    "**/Tests/"
+                    "/Tests/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -1904,53 +1905,44 @@
             ],
             "authors": [
                 {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "A set of abstractions extracted out of the Symfony components",
+            "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "keywords": [
-                "abstractions",
-                "contracts",
-                "decoupling",
-                "interfaces",
-                "interoperability",
-                "standards"
-            ],
-            "time": "2018-12-05T08:06:11+00:00"
+            "time": "2019-01-01T13:45:19+00:00"
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v4.2.1",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "921f49c3158a276d27c0d770a5a347a3b718b328"
+                "reference": "d1cdd46c53c264a2bd42505bd0e8ce21423bd0e2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/921f49c3158a276d27c0d770a5a347a3b718b328",
-                "reference": "921f49c3158a276d27c0d770a5a347a3b718b328",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/d1cdd46c53c264a2bd42505bd0e8ce21423bd0e2",
+                "reference": "d1cdd46c53c264a2bd42505bd0e8ce21423bd0e2",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
-                "symfony/contracts": "^1.0"
+                "php": "^5.5.9|>=7.0.8"
             },
             "conflict": {
-                "symfony/dependency-injection": "<3.4"
+                "symfony/dependency-injection": "<3.3"
             },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~3.4|~4.0",
-                "symfony/dependency-injection": "~3.4|~4.0",
-                "symfony/expression-language": "~3.4|~4.0",
-                "symfony/stopwatch": "~3.4|~4.0"
+                "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/dependency-injection": "~3.3|~4.0",
+                "symfony/expression-language": "~2.8|~3.0|~4.0",
+                "symfony/stopwatch": "~2.8|~3.0|~4.0"
             },
             "suggest": {
                 "symfony/dependency-injection": "",
@@ -1959,7 +1951,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -1986,30 +1978,30 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2018-12-01T08:52:38+00:00"
+            "time": "2019-01-01T18:08:36+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v4.2.1",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "2f4c8b999b3b7cadb2a69390b01af70886753710"
+                "reference": "c24ce3d18ccc9bb9d7e1d6ce9330fcc6061cafde"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/2f4c8b999b3b7cadb2a69390b01af70886753710",
-                "reference": "2f4c8b999b3b7cadb2a69390b01af70886753710",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/c24ce3d18ccc9bb9d7e1d6ce9330fcc6061cafde",
+                "reference": "c24ce3d18ccc9bb9d7e1d6ce9330fcc6061cafde",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
+                "php": "^5.5.9|>=7.0.8",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -2036,29 +2028,29 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2018-11-11T19:52:12+00:00"
+            "time": "2019-01-01T13:45:19+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v4.2.1",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "e53d477d7b5c4982d0e1bfd2298dbee63d01441d"
+                "reference": "3f2a2ab6315dd7682d4c16dcae1e7b95c8b8555e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/e53d477d7b5c4982d0e1bfd2298dbee63d01441d",
-                "reference": "e53d477d7b5c4982d0e1bfd2298dbee63d01441d",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/3f2a2ab6315dd7682d4c16dcae1e7b95c8b8555e",
+                "reference": "3f2a2ab6315dd7682d4c16dcae1e7b95c8b8555e",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -2085,29 +2077,29 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2018-11-11T19:52:12+00:00"
+            "time": "2019-01-01T13:45:19+00:00"
         },
         {
             "name": "symfony/options-resolver",
-            "version": "v4.2.1",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/options-resolver.git",
-                "reference": "a9c38e8a3da2c03b3e71fdffa6efb0bda51390ba"
+                "reference": "8a10e36ffd04c0c551051594952304d34ecece71"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/a9c38e8a3da2c03b3e71fdffa6efb0bda51390ba",
-                "reference": "a9c38e8a3da2c03b3e71fdffa6efb0bda51390ba",
+                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/8a10e36ffd04c0c551051594952304d34ecece71",
+                "reference": "8a10e36ffd04c0c551051594952304d34ecece71",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -2139,7 +2131,7 @@
                 "configuration",
                 "options"
             ],
-            "time": "2018-11-11T19:52:12+00:00"
+            "time": "2019-01-01T13:45:19+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -2374,25 +2366,25 @@
         },
         {
             "name": "symfony/process",
-            "version": "v4.2.1",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "2b341009ccec76837a7f46f59641b431e4d4c2b0"
+                "reference": "0d41dd7d95ed179aed6a13393b0f4f97bfa2d25c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/2b341009ccec76837a7f46f59641b431e4d4c2b0",
-                "reference": "2b341009ccec76837a7f46f59641b431e4d4c2b0",
+                "url": "https://api.github.com/repos/symfony/process/zipball/0d41dd7d95ed179aed6a13393b0f4f97bfa2d25c",
+                "reference": "0d41dd7d95ed179aed6a13393b0f4f97bfa2d25c",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -2419,30 +2411,29 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2018-11-20T16:22:05+00:00"
+            "time": "2019-01-02T21:24:08+00:00"
         },
         {
             "name": "symfony/stopwatch",
-            "version": "v4.2.1",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/stopwatch.git",
-                "reference": "ec076716412274e51f8a7ea675d9515e5c311123"
+                "reference": "af55d31cb58c5452d2c160655fa1968b872a8084"
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             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/ec076716412274e51f8a7ea675d9515e5c311123",
-                "reference": "ec076716412274e51f8a7ea675d9515e5c311123",
+                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/af55d31cb58c5452d2c160655fa1968b872a8084",
+                "reference": "af55d31cb58c5452d2c160655fa1968b872a8084",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
-                "symfony/contracts": "^1.0"
+                "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -2469,7 +2460,7 @@
             ],
             "description": "Symfony Stopwatch Component",
             "homepage": "https://symfony.com",
-            "time": "2018-11-11T19:52:12+00:00"
+            "time": "2019-01-01T13:45:19+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -2513,20 +2504,21 @@
         },
         {
             "name": "webmozart/assert",
-            "version": "1.3.0",
+            "version": "1.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozart/assert.git",
-                "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
+                "reference": "83e253c8e0be5b0257b881e1827274667c5c17a9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
-                "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/83e253c8e0be5b0257b881e1827274667c5c17a9",
+                "reference": "83e253c8e0be5b0257b881e1827274667c5c17a9",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3.3 || ^7.0"
+                "php": "^5.3.3 || ^7.0",
+                "symfony/polyfill-ctype": "^1.8"
             },
             "require-dev": {
                 "phpunit/phpunit": "^4.6",
@@ -2559,7 +2551,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2018-01-29T19:49:41+00:00"
+            "time": "2018-12-25T11:19:39+00:00"
         }
     ],
     "aliases": [],
@@ -2568,10 +2560,10 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.2"
+        "php": "^7.1"
     },
     "platform-dev": [],
     "platform-overrides": {
-        "php": "7.2"
+        "php": "7.1"
     }
 }