diff --git a/src-ui/changes.html b/src-ui/changes.html
index d87e4b6c7..5e625afbc 100644
--- a/src-ui/changes.html
+++ b/src-ui/changes.html
@@ -33,13 +33,13 @@
 <main>
 <div style="margin-bottom: 5px;"><b>Latest types</b> (<em><a href="/list.html" target="_parent">all types</a></em>)</div>
 <ul>
+  <li><a href="/p?elasticlink" target="_parent">Elastic Link</a></li>
   <li><a href="/p?landmeasure" target="_parent">Land Measurement</a></li>
   <li><a href="/p?trizone" target="_parent">Trizone サントイッチ</a></li>
   <li><a href="/p?ubahn" target="_parent">U-Bahn</a></li>
   <li><a href="/p?soulmates" target="_parent">Soul Mates ソウルメイツ</a></li>
   <li><a href="/p?longest" target="_parent">The Longest 短辺消失</a></li>
   <li><a href="/p?yokeimoji" target="_parent">Yokeimoji Cross 余計文字クロス</a></li>
-  <li><a href="/p?golemgrad" target="_parent">Golem Grad</a></li>
 </ul>
 </main>
 </body>
diff --git a/src-ui/js/ui/KeyPopup.js b/src-ui/js/ui/KeyPopup.js
index c79794bfa..e06a5057c 100644
--- a/src-ui/js/ui/KeyPopup.js
+++ b/src-ui/js/ui/KeyPopup.js
@@ -261,7 +261,8 @@ ui.keypopup = {
 		golemgrad: [10, 0],
 		topo: [10, 10],
 		soulmates: [10, 10],
-		landmeasure: [10, 0]
+		landmeasure: [10, 0],
+		elasticlink: [10, 0]
 	},
 
 	//---------------------------------------------------------------------------
@@ -526,6 +527,9 @@ ui.keypopup = {
 		if (pid === "familyphoto") {
 			itemlist.push(["q", "●"]);
 		}
+		if (pid === "elasticlink") {
+			itemlist.push(["q", "○"]);
+		}
 		if (
 			pid === "icelom" ||
 			pid === "icelom2" ||
diff --git a/src-ui/list.html b/src-ui/list.html
index 3457d6e30..d80dc82ed 100644
--- a/src-ui/list.html
+++ b/src-ui/list.html
@@ -239,6 +239,7 @@ <h2 id="title"><span lang="ja">パズルの種類のリスト</span><span lang="
     <li data-pid="wataridori"></li>
     <li data-pid="uturns"></li>
     <li data-pid="golemgrad"></li>
+    <li data-pid="elasticlink"></li>
    </ul>
   </div>
   <div class="lists lines">
diff --git a/src/pzpr/variety.js b/src/pzpr/variety.js
index 2b09a54ed..ddac83b18 100755
--- a/src/pzpr/variety.js
+++ b/src/pzpr/variety.js
@@ -161,6 +161,7 @@
 			doubleback: [0, 0, "Double Back", "Double Back", "country"],
 			easyasabc: [0, 0, "ABCプレース", "Easy as ABC"],
 			edamame: [0, 0, "Edamame", "Edamame", "kaidan"],
+			elasticlink: [0, 0, "Elastic Link", "Elastic Link"],
 			energywalk: [0, 0, "Energy Walk", "Energy Walk", "icewalk"],
 			evolmino: [0, 0, "シンカミノ", "Evolmino"],
 			factors: [0, 0, "因子の部屋", "Rooms of Factors"],
diff --git a/src/res/failcode.en.json b/src/res/failcode.en.json
index c6973b09d..4dbeee42c 100644
--- a/src/res/failcode.en.json
+++ b/src/res/failcode.en.json
@@ -565,6 +565,7 @@
     "laLenNe": "The length of a line is wrong.",
     "laLoop": "A line forms a loop.",
     "laMoveOver.herugolf": "You make a bogey or more.",
+    "laNoCurve": "A line doesn't turn.",
     "laOnBorder": "There is a line across a border.",
     "laOnHole.herugolf": "A line goes through a hole.",
     "laOnIce.oyakodori": "A line goes through a nest cell.",
@@ -668,6 +669,7 @@
     "lnLengthGt3": "A line is longer than 3 cells.",
     "lnLengthLt.pencils": "A line is shorter than the connected pencil.",
     "lnLengthLt3": "A line is shorter than 3 cells.",
+    "lnLengthNe.elasticlink": "A number doesn't overlap a segment of the correct length.",
     "lnLengthNe3.wittgen": "A block does not cover exactly 3 cells.",
     "lnLenLt.anglers": "A line is shorter than the number.",
     "lnLenLt.reflect": "The lines passing a triangle are too short.",
@@ -833,6 +835,7 @@
     "nmMoveNe.tren": "A block cannot move in the correct number of spaces.",
     "nmNoLine.amibo": "No bar connects to a white circle.",
     "nmNoLine.coffeemilk": "A white or black circle doesn't have a line.",
+    "nmNoLine.elasticlink": "A number or circle doesn't have a line.",
     "nmNoLine.firefly": "There is a lonely firefly.",
     "nmNoLine.ichimaga": "A circle doesn't start any line.",
     "nmNoLine.kusabi": "A circle is not connected to another object.",
@@ -946,6 +949,7 @@
     "routeLenLoop": "The route does not contain a loop.",
     "routeIgnoreCP.nurimaze": "There is a circle out of the shortest route from S to G.",
     "routePassDeadEnd.nurimaze": "There is a triangle on the shortest route from S to G.",
+    "segAlternate": "Two connected segments don't have a length difference of exactly 1.",
     "segBlackEq.balance": "Segments through a black circle are equal.",
     "segDiff.geradeweg": "Segments have different length.",
     "segLong.balance": "A segment is too long.",
diff --git a/src/variety-common/Answer.js b/src/variety-common/Answer.js
index d12d4e1fd..49173d232 100644
--- a/src/variety-common/Answer.js
+++ b/src/variety-common/Answer.js
@@ -448,6 +448,23 @@ pzpr.classmgr.makeCommon({
 			}
 		},
 
+		checkLoop: function() {
+			var paths = this.board.linegraph.components;
+			for (var r = 0; r < paths.length; r++) {
+				var path = paths[r];
+				if (path.circuits === 0) {
+					continue;
+				}
+
+				this.failcode.add("laLoop");
+				if (this.checkOnly) {
+					break;
+				}
+				this.board.border.setnoerr();
+				path.setedgeerr(1);
+			}
+		},
+
 		//---------------------------------------------------------------------------
 		// ans.checkConnectLineCount() ○などがないセルから出ている線の本数について判定する
 		//---------------------------------------------------------------------------
diff --git a/src/variety/country.js b/src/variety/country.js
index ab737b251..ce94f18de 100644
--- a/src/variety/country.js
+++ b/src/variety/country.js
@@ -1858,25 +1858,6 @@
 				return cell1.lcnt === 1 && cell2.lcnt === 1;
 			}, "lnDeadEndAround");
 		},
-		checkLoop: function() {
-			var bd = this.board;
-			var paths = bd.linegraph.components;
-			for (var r = 0; r < paths.length; r++) {
-				if (
-					paths[r].clist.some(function(cell) {
-						return cell.lcnt !== 2;
-					})
-				) {
-					continue;
-				}
-				this.failcode.add("laLoop");
-				if (this.checkOnly) {
-					break;
-				}
-				this.board.border.setnoerr();
-				paths[r].setedgeerr(1);
-			}
-		},
 		checkLinesInRoom: function() {
 			var bd = this.board;
 			var paths = bd.linegraph.components;
diff --git a/src/variety/elasticlink.js b/src/variety/elasticlink.js
new file mode 100644
index 000000000..5891cac19
--- /dev/null
+++ b/src/variety/elasticlink.js
@@ -0,0 +1,275 @@
+(function(pidlist, classbase) {
+	if (typeof module === "object" && module.exports) {
+		module.exports = [pidlist, classbase];
+	} else {
+		pzpr.classmgr.makeCustom(pidlist, classbase);
+	}
+})(["elasticlink"], {
+	MouseEvent: {
+		inputModes: {
+			edit: ["mark-circle", "number", "empty", "clear"],
+			play: ["border", "subline"]
+		},
+		autoedit_func: "qnum",
+		autoplay_func: "line",
+
+		mouseinput_other: function() {
+			if (this.inputMode === "mark-circle") {
+				this.inputIcebarn();
+			}
+		}
+	},
+
+	KeyEvent: {
+		enablemake: true,
+		keyinput: function(ca) {
+			if (ca === "q" || ca === "o") {
+				var cell = this.cursor.getc();
+				cell.setQues(cell.ques !== 6 ? 6 : 0);
+				this.prev = cell;
+				cell.draw();
+			} else {
+				this.key_inputqnum(ca);
+			}
+		}
+	},
+	Cell: {
+		noLP: function() {
+			return this.isEmpty();
+		},
+		maxnum: function() {
+			var bd = this.board;
+			return Math.max(bd.cols, bd.rows);
+		},
+		isLineShapeEndpoint: function() {
+			return this.ice();
+		},
+		getSegment: function(horiz) {
+			var llist = new this.klass.PieceList();
+			var cell;
+			if (horiz) {
+				for (
+					cell = this;
+					cell.adjborder.right.isLine();
+					cell = cell.adjacent.right
+				) {
+					llist.add(cell.adjborder.right);
+				}
+				for (
+					cell = this;
+					cell.adjborder.left.isLine();
+					cell = cell.adjacent.left
+				) {
+					llist.add(cell.adjborder.left);
+				}
+			} else {
+				for (
+					cell = this;
+					cell.adjborder.top.isLine();
+					cell = cell.adjacent.top
+				) {
+					llist.add(cell.adjborder.top);
+				}
+				for (
+					cell = this;
+					cell.adjborder.bottom.isLine();
+					cell = cell.adjacent.bottom
+				) {
+					llist.add(cell.adjborder.bottom);
+				}
+			}
+			return llist;
+		}
+	},
+	Board: {
+		hasborder: 1
+	},
+	Border: {
+		enableLineNG: true
+	},
+
+	LineGraph: {
+		enabled: true,
+		makeClist: true
+	},
+
+	//---------------------------------------------------------
+	// 画像表示系
+	Graphic: {
+		irowake: true,
+
+		gridcolor_type: "LIGHT",
+
+		numbercolor_func: "fixed",
+
+		fontsizeratio: 0.65 /* 丸数字 */,
+
+		paint: function() {
+			this.drawBGCells();
+			this.drawGrid();
+			this.drawLines();
+
+			this.drawPekes();
+
+			this.drawCircledNumbers();
+
+			this.drawChassis();
+
+			this.drawTarget();
+		},
+
+		getBGCellColor: function(cell) {
+			return cell.ques === 7 ? "black" : this.getBGCellColor_error1(cell);
+		},
+		getCircleFillColor: function(cell) {
+			return cell.ice() ? "rgba(255,255,255,0.5)" : null;
+		},
+		getCircleStrokeColor: function(cell) {
+			return cell.ice() ? "black" : null;
+		}
+	},
+
+	Encode: {
+		decodePzpr: function(type) {
+			this.decodeIce();
+			this.decodeNumber16();
+			this.decodeEmpty();
+		},
+		encodePzpr: function(type) {
+			this.encodeIce();
+			this.encodeNumber16();
+			this.encodeEmpty();
+		}
+	},
+	//---------------------------------------------------------
+	FileIO: {
+		decodeData: function() {
+			this.decodeCell(function(cell, ca) {
+				if (ca === "#") {
+					cell.ques = 7;
+					return;
+				}
+				if (ca.charAt(0) === "O") {
+					cell.ques = 6;
+					ca = ca.substr(1);
+				}
+				if (ca === "-") {
+					cell.qnum = -2;
+				} else if (+ca > 0) {
+					cell.qnum = +ca;
+				}
+			});
+			this.decodeBorderLine();
+		},
+		encodeData: function() {
+			this.encodeCell(function(cell) {
+				if (cell.ques === 7) {
+					return "# ";
+				}
+
+				var ca = "";
+				if (cell.ques === 6) {
+					ca += "O";
+				}
+
+				if (cell.qnum === -2) {
+					ca += "-";
+				} else if (cell.qnum > 0) {
+					ca += cell.qnum.toString();
+				}
+
+				if (ca === "") {
+					ca = ".";
+				}
+				return ca + " ";
+			});
+			this.encodeBorderLine();
+		}
+	},
+
+	AnsCheck: {
+		checklist: [
+			"checkBranchLine",
+			"checkCrossLine",
+			"checkLoop",
+
+			"checkNoCurveLine",
+			"checkSegmentLength",
+			"checkSegmentAlternating",
+
+			"checkDeadendConnectLine+",
+			"checkNoLineObject"
+		],
+
+		checkNoCurveLine: function() {
+			this.checkLineShape(function(path) {
+				if (path.cells[1].isnull) {
+					return false;
+				}
+
+				return path.ccnt === 0;
+			}, "laNoCurve");
+		},
+
+		checkDeadendConnectLine: function() {
+			this.checkAllCell(function(cell) {
+				return !cell.ice() && cell.lcnt === 1;
+			}, "lnDeadEnd");
+		},
+		checkNoLineObject: function() {
+			this.checkAllCell(function(cell) {
+				return (cell.ice() || cell.isNum()) && cell.lcnt === 0;
+			}, "nmNoLine");
+		},
+
+		checkSegmentAlternating: function() {
+			var bd = this.board;
+			for (var c = 0; c < bd.cell.length; c++) {
+				var cell = bd.cell[c];
+				if (!cell.isLineCurve()) {
+					continue;
+				}
+				var horiz = cell.getSegment(true);
+				var vert = cell.getSegment(false);
+
+				if (Math.abs(horiz.length - vert.length) === 1) {
+					continue;
+				}
+
+				this.failcode.add("segAlternate");
+				if (this.checkOnly) {
+					break;
+				}
+				bd.border.setnoerr();
+				cell.seterr(1);
+				horiz.seterr(1);
+				vert.seterr(1);
+			}
+		},
+
+		checkSegmentLength: function() {
+			var bd = this.board;
+			for (var c = 0; c < bd.cell.length; c++) {
+				var cell = bd.cell[c];
+				if (cell.lcnt === 0 || !cell.isValidNum()) {
+					continue;
+				}
+				var horiz = cell.getSegment(true);
+				var vert = cell.getSegment(false);
+
+				if (horiz.length === cell.qnum || vert.length === cell.qnum) {
+					continue;
+				}
+
+				this.failcode.add("lnLengthNe");
+				if (this.checkOnly) {
+					break;
+				}
+				bd.border.setnoerr();
+				cell.seterr(1);
+				horiz.seterr(1);
+				vert.seterr(1);
+			}
+		}
+	}
+});
diff --git a/src/variety/kaidan.js b/src/variety/kaidan.js
index 82f21ac75..ef31c3c20 100644
--- a/src/variety/kaidan.js
+++ b/src/variety/kaidan.js
@@ -1077,22 +1077,6 @@
 			return this.isIndividualObject(clist, function(cell) {
 				return cell.qans === 1 && cell.path ? cell.path.id : -1;
 			});
-		},
-		checkLoop: function() {
-			var paths = this.board.linegraph.components;
-			for (var r = 0; r < paths.length; r++) {
-				var path = paths[r];
-				if (path.circuits === 0) {
-					continue;
-				}
-
-				this.failcode.add("laLoop");
-				if (this.checkOnly) {
-					break;
-				}
-				this.board.border.setnoerr();
-				path.setedgeerr(1);
-			}
 		}
 	},
 	"AnsCheck@takoyaki,edamame#2": {
diff --git a/src/variety/nuriloop.js b/src/variety/nuriloop.js
index a672ac637..1ed606e29 100644
--- a/src/variety/nuriloop.js
+++ b/src/variety/nuriloop.js
@@ -214,21 +214,6 @@
 				return cell.lcnt === 1 && cell.qnum !== 0;
 			}, "lnDeadEnd");
 		},
-		checkLoop: function() {
-			var bd = this.board;
-			var paths = bd.linegraph.components;
-			for (var r = 0; r < paths.length; r++) {
-				if (paths[r].circuits === 0) {
-					continue;
-				}
-				this.failcode.add("laLoop");
-				if (this.checkOnly) {
-					break;
-				}
-				this.board.border.setnoerr();
-				paths[r].setedgeerr(1);
-			}
-		},
 		checkNoLineObject: function() {
 			this.checkAllCell(function(cell) {
 				return cell.qnum === 0 && cell.lcnt === 0;
diff --git a/test/script/elasticlink.js b/test/script/elasticlink.js
new file mode 100644
index 000000000..0f8721109
--- /dev/null
+++ b/test/script/elasticlink.js
@@ -0,0 +1,44 @@
+/* elasticlink.js */
+
+ui.debug.addDebugData("elasticlink", {
+	url: "5/5/8040c.q1l3k",
+	failcheck: [
+		[
+			"lnBranch",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /0 1 1 0 /0 0 0 0 /0 0 0 0 /0 1 1 0 /0 0 0 0 /0 0 0 1 0 /0 0 0 1 0 /0 0 1 1 0 /0 1 0 0 0 /"
+		],
+		[
+			"lnCross",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /0 0 0 0 /0 1 1 0 /0 0 0 0 /0 1 1 0 /0 0 0 0 /0 1 0 0 0 /0 0 0 1 0 /0 0 1 1 0 /0 1 1 0 0 /"
+		],
+		[
+			"laLoop",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /0 0 0 0 /0 1 1 1 /0 0 0 0 /0 1 1 1 /0 0 0 0 /0 0 0 0 0 /0 1 0 0 1 /0 1 0 0 1 /0 0 0 0 0 /"
+		],
+		[
+			"laNoCurve",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /0 0 0 0 /0 0 0 0 /0 0 0 0 /0 0 0 0 /0 0 0 0 /0 1 0 0 0 /0 1 0 0 0 /0 1 0 0 0 /0 1 0 0 0 /"
+		],
+		[
+			"lnLengthNe",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /0 0 0 0 /0 0 0 0 /0 0 0 0 /0 0 1 1 /0 0 1 1 /0 0 0 0 0 /0 0 0 0 0 /0 0 1 0 0 /0 0 0 0 1 /"
+		],
+		[
+			"segAlternate",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /0 0 0 0 /1 1 1 1 /0 0 0 0 /0 0 0 0 /1 0 1 1 /0 0 0 0 0 /1 0 0 0 1 /1 0 0 0 1 /1 0 0 0 1 /"
+		],
+		[
+			"lnDeadEnd",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /1 0 0 0 /0 0 1 1 /0 0 0 0 /0 0 0 0 /1 0 1 1 /1 0 0 0 0 /1 0 1 0 1 /0 0 0 0 1 /0 0 0 0 1 /"
+		],
+		[
+			"nmNoLine",
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /0 0 0 0 /0 0 1 1 /1 0 0 0 /0 0 0 0 /1 0 1 1 /0 1 0 0 0 /0 1 1 0 1 /1 0 0 0 1 /1 0 0 0 1 /"
+		],
+		[
+			null,
+			"pzprv3/elasticlink/5/5/- O . . . /. . . . . /. . O1 . . /. . . . 3 /. O O . . /1 0 0 0 /0 0 1 1 /1 0 0 0 /0 0 0 0 /0 0 1 1 /1 0 0 0 0 /1 0 1 0 1 /0 1 0 0 1 /0 1 0 0 1 /"
+		]
+	],
+	inputs: []
+});