<style media="screen"> html{font-size:12px}*{box-sizing:border-box;text-rendering:geometricPrecision}body{font-size:1rem;line-height:1.5rem;margin:0;font-family:Menlo,Monaco,Lucida Console,Liberation Mono,DejaVu Sans Mono,Bitstream Vera Sans Mono,Courier New,monospace,serif;word-wrap:break-word}h1,h2,h3,h4,h5,h6{line-height:1.3em}fieldset{border:none;padding:0;margin:0}pre{padding:2rem;margin:1.75rem 0;background-color:#fff;border:1px solid #ccc;overflow:auto}code[class*=language-],pre[class*=language-],pre code{font-weight:100;text-shadow:none;margin:1.75rem 0}a{cursor:pointer;color:#ff2e88;text-decoration:none;border-bottom:1px solid #ff2e88}a:hover{background-color:#ff2e88;color:#fff}.grid{display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap}.grid.\-top{-ms-flex-align:start;-ms-grid-row-align:flex-start;align-items:flex-start}.grid.\-middle{-ms-flex-align:center;-ms-grid-row-align:center;align-items:center}.grid.\-bottom{-ms-flex-align:end;-ms-grid-row-align:flex-end;align-items:flex-end}.grid.\-stretch{-ms-flex-align:stretch;-ms-grid-row-align:stretch;align-items:stretch}.grid.\-baseline{-ms-flex-align:baseline;-ms-grid-row-align:baseline;align-items:baseline}.grid.\-left{-ms-flex-pack:start;justify-content:flex-start}.grid.\-center{-ms-flex-pack:center;justify-content:center}.grid.\-right{-ms-flex-pack:end;justify-content:flex-end}.grid.\-between{-ms-flex-pack:justify;justify-content:space-between}.grid.\-around{-ms-flex-pack:distribute;justify-content:space-around}.cell{-ms-flex:1;flex:1;box-sizing:border-box}@media screen and (min-width:768px){.cell.\-1of12{-ms-flex:0 0 8.33333%;flex:0 0 8.33333%}.cell.\-2of12{-ms-flex:0 0 16.66667%;flex:0 0 16.66667%}.cell.\-3of12{-ms-flex:0 0 25%;flex:0 0 25%}.cell.\-4of12{-ms-flex:0 0 33.33333%;flex:0 0 33.33333%}.cell.\-5of12{-ms-flex:0 0 41.66667%;flex:0 0 41.66667%}.cell.\-6of12{-ms-flex:0 0 50%;flex:0 0 50%}.cell.\-7of12{-ms-flex:0 0 58.33333%;flex:0 0 58.33333%}.cell.\-8of12{-ms-flex:0 0 66.66667%;flex:0 0 66.66667%}.cell.\-9of12{-ms-flex:0 0 75%;flex:0 0 75%}.cell.\-10of12{-ms-flex:0 0 83.33333%;flex:0 0 83.33333%}.cell.\-11of12{-ms-flex:0 0 91.66667%;flex:0 0 91.66667%}}@media screen and (max-width:768px){.grid{-ms-flex-direction:column;flex-direction:column}.cell{-ms-flex:0 0 auto;flex:0 0 auto}}.hack,.hack blockquote,.hack code,.hack em,.hack h1,.hack h2,.hack h3,.hack h4,.hack h5,.hack h6,.hack strong{font-size:1rem;font-style:normal;font-family:Menlo,Monaco,Lucida Console,Liberation Mono,DejaVu Sans Mono,Bitstream Vera Sans Mono,Courier New,monospace,serif}.hack blockquote,.hack code,.hack em,.hack strong{line-height:20px}.hack blockquote,.hack code,.hack footer,.hack h1,.hack h2,.hack h3,.hack h4,.hack h5,.hack h6,.hack header,.hack li,.hack ol,.hack p,.hack section,.hack ul{float:none;margin:0;padding:0}.hack blockquote,.hack h1,.hack ol,.hack p,.hack ul{margin-top:20px;margin-bottom:20px}.hack h1{position:relative;display:inline-block;display:table-cell;padding:20px 0 30px;margin:0;overflow:hidden}.hack h1:after{content:"====================================================================================================";position:absolute;bottom:10px;left:0}.hack h1+*{margin-top:0}.hack h2,.hack h3,.hack h4,.hack h5,.hack h6{position:relative;margin-bottom:1.75rem}.hack h2:before,.hack h3:before,.hack h4:before,.hack h5:before,.hack h6:before{display:inline}.hack h2:before{content:"## "}.hack h3:before{content:"### "}.hack h4:before{content:"#### "}.hack h5:before{content:"##### "}.hack h6:before{content:"###### "}.hack li{position:relative;display:block;padding-left:20px}.hack li:after{position:absolute;top:0;left:0}.hack ul>li:after{content:"-"}.hack ol{counter-reset:a}.hack ol>li:after{content:counter(a) ".";counter-increment:a}.hack blockquote{position:relative;padding-left:17px;padding-left:2ch;overflow:hidden}.hack blockquote:after{content:">\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>\A>";white-space:pre;position:absolute;top:0;left:0;line-height:20px}.hack em:after,.hack em:before{content:"*";display:inline}.hack pre code:after,.hack pre code:before{content:''}.hack code{font-weight:700}.hack code:after,.hack code:before{content:"`";display:inline}.hack hr{position:relative;height:20px;overflow:hidden;border:0;margin:20px 0}.hack hr:after{content:"----------------------------------------------------------------------------------------------------";position:absolute;top:0;left:0;line-height:20px;width:100%;word-wrap:break-word}@-moz-document url-prefix(){.hack h1{display:block}}.hack-ones ol>li:after{content:"1."}p{margin:0 0 1.75rem}.container{max-width:70rem}.container,.container-fluid{margin:0 auto;padding:0 1rem}.inner{padding:1rem}.inner2x{padding:2rem}.pull-left{float:left}.pull-right{float:right}.progress-bar{height:8px;opacity:.8;background-color:#ccc;margin-top:12px}.progress-bar.progress-bar-show-percent{margin-top:38px}.progress-bar-filled{background-color:gray;height:100%;transition:width .3s ease;position:relative;width:0}.progress-bar-filled:before{content:'';border:6px solid transparent;border-top-color:gray;position:absolute;top:-12px;right:-6px}.progress-bar-filled:after{color:gray;content:attr(data-filled);display:block;font-size:12px;white-space:nowrap;position:absolute;border:6px solid transparent;top:-38px;right:0;-ms-transform:translateX(50%);transform:translateX(50%)}table{width:100%;border-collapse:collapse;margin:1.75rem 0;color:#778087}table td,table th{vertical-align:top;border:1px solid #ccc;line-height:15px;padding:10px}table thead th{font-size:10px}table tbody td:first-child{font-weight:700;color:#333}.form{width:30rem}.form-group{margin-bottom:1.75rem;overflow:auto}.form-group label{border-bottom:2px solid #ccc;color:#333;width:10rem;display:inline-block;height:38px;line-height:38px;padding:0;float:left;position:relative}.form-group.form-success label{color:#4caf50!important;border-color:#4caf50!important}.form-group.form-warning label{color:#ff9800!important;border-color:#ff9800!important}.form-group.form-error label{color:#f44336!important;border-color:#f44336!important}.form-control{outline:none;border:none;border-bottom:2px solid #ccc;padding:.5rem 0;width:20rem;height:38px;background-color:transparent}.form-control:focus{border-color:#555}.form-group.form-textarea label:after{position:absolute;content:'';width:2px;background-color:#fff;right:-2px;top:0;bottom:0}textarea.form-control{height:auto;resize:none;padding:1rem 0;border-bottom:2px solid #ccc;border-left:2px solid #ccc;padding:.5rem}select.form-control{border-radius:0;background-color:transparent;-webkit-appearance:none;-moz-appearance:none;-ms-appearance:none}.help-block{color:#999;margin-top:.5rem}.form-actions{margin-bottom:1.75rem}.btn{display:-ms-inline-flexbox;display:inline-flex;-ms-flex-align:center;align-items:center;-ms-flex-pack:center;justify-content:center;cursor:pointer;outline:none;padding:.65rem 2rem;font-size:1rem;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;position:relative;z-index:1}.btn:active{box-shadow:inset 0 1px 3px rgba(0,0,0,.12)}.btn.btn-ghost{border-color:#757575;color:#757575;background-color:transparent}.btn.btn-ghost:focus,.btn.btn-ghost:hover{border-color:#424242;color:#424242;z-index:2}.btn.btn-ghost:hover{background-color:transparent}.btn-block{width:100%;display:-ms-flexbox;display:flex}.btn-default{color:#fff;background-color:#e0e0e0;border:1px solid #e0e0e0;color:#333}.btn-default:focus:not(.btn-ghost),.btn-default:hover{background-color:#dcdcdc;border-color:#dcdcdc}.btn-success{color:#fff;background-color:#4caf50;border:1px solid #4caf50}.btn-success:focus:not(.btn-ghost),.btn-success:hover{background-color:#43a047;border-color:#43a047}.btn-success.btn-ghost{border-color:#4caf50;color:#4caf50}.btn-success.btn-ghost:focus,.btn-success.btn-ghost:hover{border-color:#388e3c;color:#388e3c;z-index:2}.btn-error{color:#fff;background-color:#f44336;border:1px solid #f44336}.btn-error:focus:not(.btn-ghost),.btn-error:hover{background-color:#e53935;border-color:#e53935}.btn-error.btn-ghost{border-color:#f44336;color:#f44336}.btn-error.btn-ghost:focus,.btn-error.btn-ghost:hover{border-color:#d32f2f;color:#d32f2f;z-index:2}.btn-warning{color:#fff;background-color:#ff9800;border:1px solid #ff9800}.btn-warning:focus:not(.btn-ghost),.btn-warning:hover{background-color:#fb8c00;border-color:#fb8c00}.btn-warning.btn-ghost{border-color:#ff9800;color:#ff9800}.btn-warning.btn-ghost:focus,.btn-warning.btn-ghost:hover{border-color:#f57c00;color:#f57c00;z-index:2}.btn-info{color:#fff;background-color:#00bcd4;border:1px solid #00bcd4}.btn-info:focus:not(.btn-ghost),.btn-info:hover{background-color:#00acc1;border-color:#00acc1}.btn-info.btn-ghost{border-color:#00bcd4;color:#00bcd4}.btn-info.btn-ghost:focus,.btn-info.btn-ghost:hover{border-color:#0097a7;color:#0097a7;z-index:2}.btn-primary{color:#fff;background-color:#2196f3;border:1px solid #2196f3}.btn-primary:focus:not(.btn-ghost),.btn-primary:hover{background-color:#1e88e5;border-color:#1e88e5}.btn-primary.btn-ghost{border-color:#2196f3;color:#2196f3}.btn-primary.btn-ghost:focus,.btn-primary.btn-ghost:hover{border-color:#1976d2;color:#1976d2;z-index:2}.btn-group{overflow:auto}.btn-group .btn{float:left}.btn-group .btn-ghost:not(:first-child){margin-left:-1px}.card{border:1px solid #ccc}.card .card-header{color:#333;text-align:center;background-color:#ddd;padding:.5rem 0}.alert{color:#ccc;padding:1rem;border:1px solid #ccc;margin-bottom:1.75rem}.alert-success{color:#4caf50;border-color:#4caf50}.alert-error{color:#f44336;border-color:#f44336}.alert-info{color:#00bcd4;border-color:#00bcd4}.alert-warning{color:#ff9800;border-color:#ff9800}.media:not(:last-child){margin-bottom:1.25rem}.media-left{padding-right:1rem}.media-left,.media-right{display:table-cell;vertical-align:top}.media-right{padding-left:1rem}.media-body{display:table-cell;vertical-align:top}.media-heading{font-size:1.16667rem;font-weight:700}.media-content{margin-top:.3rem}.avatarholder,.placeholder{background-color:#f0f0f0;text-align:center;color:#b9b9b9;font-size:1rem;border:1px solid #f0f0f0}.avatarholder{width:48px;height:48px;line-height:46px;font-size:2rem;background-size:cover;background-position:50%;background-repeat:no-repeat}.avatarholder.rounded{border-radius:33px}.loading{height:20px;width:20px;animation:a .6s infinite linear;border:2px solid #e91e63;border-right-color:transparent;border-radius:50%}.btn .loading{display:inline-block;float:left;margin-right:.5rem;width:14px;height:14px}@keyframes a{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.menu{width:100%}.menu .menu-item{display:block;color:#616161;border-color:#616161}.menu .menu-item.active,.menu .menu-item:hover{color:#000;border-color:#000;background-color:transparent}@media screen and (max-width:768px){.form-group label{display:block;border-bottom:none;width:100%}.form-group.form-textarea label:after{display:none}.form-control{width:100%}textarea.form-control{border-left:none;padding:.5rem 0}pre::-webkit-scrollbar{height:3px}}@media screen and (max-width:480px){.form{width:100%}} .dark{color:#ccc}.dark,.dark pre{background-color:#000}.dark pre{padding:0;border:none}.dark pre code{color:#00bcd4}.dark h1 a,.dark h2 a,.dark h3 a,.dark h4 a,.dark h5 a{color:#ccc}.dark code,.dark strong{color:#fff}.dark code{font-weight:100}.dark table{color:#ccc}.dark table td,.dark table th{border-color:#444}.dark table tbody td:first-child{color:#fff}.dark .form-group label{color:#ccc;border-color:rgba(95,95,95,.78)}.dark .form-group.form-textarea label:after{background-color:#000}.dark .form-control{color:#ccc;border-color:rgba(95,95,95,.78)}.dark .form-control:focus{border-color:#ccc;color:#ccc}.dark textarea.form-control{color:#ccc}.dark .card{border-color:rgba(95,95,95,.78)}.dark .card .card-header{background-color:transparent;color:#ccc;border-bottom:1px solid rgba(95,95,95,.78)}.dark .btn.btn-ghost.btn-default{border-color:#ababab;color:#ababab}.dark .btn.btn-ghost.btn-default:focus,.dark .btn.btn-ghost.btn-default:hover{border-color:#9c9c9c;color:#9c9c9c;z-index:1}.dark .btn.btn-ghost.btn-default:focus,.dark .btn.btn-ghost.btn-default:hover{border-color:#e0e0e0;color:#e0e0e0}.dark .btn.btn-ghost.btn-primary:focus,.dark .btn.btn-ghost.btn-primary:hover{border-color:#64b5f6;color:#64b5f6}.dark .btn.btn-ghost.btn-success:focus,.dark .btn.btn-ghost.btn-success:hover{border-color:#81c784;color:#81c784}.dark .btn.btn-ghost.btn-info:focus,.dark .btn.btn-ghost.btn-info:hover{border-color:#4dd0e1;color:#4dd0e1}.dark .btn.btn-ghost.btn-error:focus,.dark .btn.btn-ghost.btn-error:hover{border-color:#e57373;color:#e57373}.dark .btn.btn-ghost.btn-warning:focus,.dark .btn.btn-ghost.btn-warning:hover{border-color:#ffb74d;color:#ffb74d}.dark .avatarholder,.dark .placeholder{background-color:transparent;border-color:#333}.dark .menu .menu-item{color:#ccc;border-color:rgba(95,95,95,.78)}.dark .menu .menu-item.active,.dark .menu .menu-item:hover{color:#fff;border-color:#ccc} </style> <style media="screen"> @keyframes intro { 0% { opacity: 0; } 100% { opacity: 1; } } .powered-by { color: rgba(95, 95, 95, 0.78); } main, footer { animation: intro 0.3s both; animation-delay: 0.15s; } /* hack.css overrides and enhancements */ .main { padding: 20px 10px; } nav a.active { background-color: #ff2e88; color: #fff; } html { font-size: 13px; } @media screen and (min-width: 768px) { html { font-size: 1em; } .container { max-width: 50rem; } } </style>

basic chess movement

Each of the 6 types of chess pieces has a unique set of movements.

Let’s review:

Pawn

Pawns move one square horizontally or vertically. In traditional chess, the pawn is only permitted to move toward the opponent (they cannot move backwards). Because xess.io is played with multiple opponents, pawns are permitted to move any of the cardinal directions. Additionally, xess.io pawns may attack diagonally.

pawn movement

Knight

Knight moves in an L-shape. The Knight can move 2 squares horizontally or vertically, followed by 1 square in the perpendicular direction.

knight movement

Bishop

Bishops move any number of spaces diagonally. In xess.io, Bishops will remain on the square color on which they are spawned or captured and move diagonally within that color.

bishop movement

Rook

Rooks move any number of spaces horizontally or vertically.

rook movement

Queen

Queens move any number of spaces horizontally, vertically, or diagonally.

queen movement

King

Kings move one space horizontally, vertically, or diagonally.

king movement