From 388b9fa403798f0ebce660cf9355021ed9680312 Mon Sep 17 00:00:00 2001
From: despian <mfamphlett@gmail.com>
Date: Mon, 28 Oct 2024 06:49:12 +0100
Subject: [PATCH] Add Sheep Wolf Slitherlink (#574)

---
 README.md                |   5 ++
 src-ui/changes.html      |   2 +-
 src-ui/img/swslither.png | Bin 0 -> 953 bytes
 src-ui/js/ui/KeyPopup.js |  10 +++
 src-ui/js/ui/Misc.js     |   1 +
 src-ui/list.html         |   1 +
 src-ui/p.html            |   2 +
 src-ui/res/p.en.json     |   1 +
 src-ui/res/p.ja.json     |   1 +
 src-ui/res/rules.en.yaml |   1 +
 src/puzzle/Config.js     |   2 +-
 src/puzzle/Puzzle.js     |   2 +-
 src/pzpr/variety.js      |   7 ++
 src/res/failcode.en.json |   2 +
 src/variety/slither.js   | 146 ++++++++++++++++++++++++++++++++++++++-
 test/script/swslither.js | 111 +++++++++++++++++++++++++++++
 16 files changed, 288 insertions(+), 6 deletions(-)
 create mode 100644 src-ui/img/swslither.png
 create mode 100644 test/script/swslither.js

diff --git a/README.md b/README.md
index 54162bbda..5353b4acd 100644
--- a/README.md
+++ b/README.md
@@ -107,3 +107,8 @@ peke: cross mark
 [puzz.link]: https://puzz.link/list.html
 [sudoku]: https://en.wikipedia.org/wiki/Sudoku
 [yajilin]: https://en.wikipedia.org/wiki/Yajilin
+
+
+## OpenSource Licenses
+
+Emojis used in some puzzles are sourced from [noto-emoji](https://github.com/googlefonts/noto-emoji) and licensed under the [SIL Open Font License](https://scripts.sil.org/OFL), Version 1.1.
diff --git a/src-ui/changes.html b/src-ui/changes.html
index 4b564fc45..2975b15d2 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?swslither" target="_parent">Sheep Wolf Slitherlink</a></li>
   <li><a href="/p?meidjuluk" target="_parent">Meidjuluk</a></li>
   <li><a href="/p?smullyan" target="_parent">Smullyanic Dynasty</a></li>
   <li><a href="/p?twinarea" target="_parent">Twin Area ツインエリア</a></li>
   <li><a href="/p?turnaround" target="_parent">Turnaround</a></li>
   <li><a href="/p?regional-poly" target="_parent">Regional Polyominoes</a></li>
   <li><a href="/p?fakearrow" target="_parent">Fake Arrow フェイクアロー</a></li>
-  <li><a href="/p?snakeegg" target="_parent">Snake Egg</a></li>
 </ul>
 </main>
 </body>
diff --git a/src-ui/img/swslither.png b/src-ui/img/swslither.png
new file mode 100644
index 0000000000000000000000000000000000000000..aeeebfa2983137b7ae56d6b34d4398e59cf2475a
GIT binary patch
literal 953
zcmV;q14jIbP)<h;3K|Lk000e1NJLTq001ul000^Y0{{R35Ki@g0001=P)t-scw<s_
zVNiNyRO;p6=;PkLv824Np~bnau%VN3T}+8}W2u;lduLYO*3Pb;kL2FiwWgS|qm_MW
zSk}$N*w4qvys^Qwr?;t`v!s@$l!e2$s=BP6s+x<7c4e1^b=%X+p^$**;oIZf)y%=S
zpN)N*h<KHPa?i!P$-c7E$i9JXTy9xN%fPkZ+0xX?!H|7yg>hi!;M$CNXpDGg&cnH$
z!sI{z00PxXL_t(I%T>~cj-xOT2H>&5#>5oUdr4>^eUp9vXS*@%-D&?QNO(Tkcr*Y&
z2+<EpJ;rz-L}VBS%Y`S4&M=Nr%0T5Kr6|K)qt$VCAH?W0?d9%k?e(4%FtJV)#VLBu
zt034s@>)uF_aYBQ@`>EebzLy`94ol=?bOcm%$IeI<Hs=EtRyLC%=`1C)ZHBVJsCJ~
zg~Op~0?RrZ#>wqERo6w+94^GBKwaaPccW;!0`gD(<K3?EJo#yw7ZB#&&0ijKEYRZt
zd0ASfsXY^-ZgA;BEd#T8bocw|bn=gW;e@&cg;K$-eO)FsqQwR5U5d;<;SYT$0!(C@
z{@1a=vgBF5Ji|+0p%0OB-~TerG|xG|fnjz*u2dFpCpHwIW?X%@mqY!}8#<-RI3K_;
z?#Y?e_07HeU%sphn8&_Nc-_mO1x!1ozHU|}<uE+ZV;244<TKB{;e(Equ(9tCfH93|
zni`-^7=9VX?gxhgA+N*XpFgMlfB$~JHt(B1{vl;!+u`N)h*y|efI!ISJi)<J;JP>L
zDA1xV{`n}&TKj5a;|KvSc*0M-w1jOMu_zcn8o&IN5ZeY&mI`<N7Ays@Z9=Y_H__v4
z9*>*fLc+p|qGb0hisK?Adj&l<5D2vXY2n#Sh~~tpEgVj|`NX|<wewRz-<={LboBiP
zV=d7EoR}1MrF8eMTMGeODPYV+?}=<(Sy8<7y&Mpp%#vZPa^ZO*8J0nM0vz3ksqcsN
z2H)Q|#tNcC9qkK##w1o^St;W|p}j*lz_4A*GW_*`J{JW~6113d^CH*lx=dJUL7DPt
zeB&FXdcCT$R8tIc##L5TxQ^8jU~ETVOb`GdddTrCq?J;Np=A}`!Q-5lR^nk9APk?N
za*3OR-oRRy1wUfKn&P}tJs#RroLk8`r+UJ)r%1Pimt<YP@s8T(Ri?ZiD@|5$>wH$a
bd;0$e&jCc<u#(1a00000NkvXXu0mjf4NB;L

literal 0
HcmV?d00001

diff --git a/src-ui/js/ui/KeyPopup.js b/src-ui/js/ui/KeyPopup.js
index af2a8cce9..03cd3d6b0 100644
--- a/src-ui/js/ui/KeyPopup.js
+++ b/src-ui/js/ui/KeyPopup.js
@@ -21,6 +21,7 @@ ui.keypopup = {
 	/* どの文字配置を作成するかのテーブル */
 	type: {
 		slither: [3, 0],
+		swslither: [5339, 0],
 		nawabari: [4, 0],
 		fourcells: [4, 0],
 		fivecells: [4, 0],
@@ -354,6 +355,8 @@ ui.keypopup = {
 			this.generate_lix(mode);
 		} else if (type === 131) {
 			this.generate_infinity(mode);
+		} else if (type === 5339) {
+			this.generate_swslither();
 		}
 	},
 	gentable4: function(mode) {
@@ -992,6 +995,13 @@ ui.keypopup = {
 		);
 	},
 
+	generate_swslither: function() {
+		this.generate_main(
+			[["5", "🐑"], ["6", "🐺"], null, "1", "2", "3", "0", " ", ["-", "?"]],
+			3
+		);
+	},
+
 	generate_main: function(list, split) {
 		for (var i = 0; i < list.length; i++) {
 			this.inputcol(list[i]);
diff --git a/src-ui/js/ui/Misc.js b/src-ui/js/ui/Misc.js
index 32c2025e9..1f179c543 100755
--- a/src-ui/js/ui/Misc.js
+++ b/src-ui/js/ui/Misc.js
@@ -199,6 +199,7 @@ function toBGimage(pid) {
 		"statuepark",
 		"subomino",
 		"wafusuma",
+		"swslither",
 		"symmarea",
 		"tachibk",
 		"tajmahal",
diff --git a/src-ui/list.html b/src-ui/list.html
index 583881866..e1c2239ea 100644
--- a/src-ui/list.html
+++ b/src-ui/list.html
@@ -119,6 +119,7 @@ <h2 id="title"><span lang="ja">パズルの種類のリスト</span><span lang="
     <li data-pid="slither"></li>
     <li data-pid="vslither"></li>
     <li data-pid="tslither"></li>
+    <li data-pid="swslither"></li>
     <li data-pid="mashu"></li>
     <li data-pid="yajilin"></li>
     <li data-pid="slalom"></li>
diff --git a/src-ui/p.html b/src-ui/p.html
index cd22df53b..1350b0c93 100644
--- a/src-ui/p.html
+++ b/src-ui/p.html
@@ -150,6 +150,7 @@ <h2 id="title2">読み込み中です...</h2>
       <div class="child" data-value="circle-shade">__inputmode.circle-shade__</div>
       <div class="child" data-value="circle-gray">__inputmode.circle-gray__</div>
       <div class="child" data-value="goat">__inputmode.goat__</div>
+      <div class="child" data-value="sheep">__inputmode.sheep__</div>
       <div class="child" data-value="wolf">__inputmode.wolf__</div>
       <div class="child" data-value="moon">__inputmode.moon__</div>
       <div class="child" data-value="sun">__inputmode.sun__</div>
@@ -470,6 +471,7 @@ <h2 id="title2">読み込み中です...</h2>
   <button type="button" class="btn" id="btnpresets" data-button-exec="applypreset">__applypreset__</button>
   <button type="button" class="btn" data-disp-pid="stostone" data-press-exec="dropblocks,resetblocks">__dropblocks__</button>
   <button type="button" class="btn" data-disp-pid="slither" data-button-exec="outlineshaded">__outlineshaded__</button>
+  <button type="button" class="btn" data-disp-pid="swslither" data-button-exec="outlineshaded">__outlineshaded__</button>
   <button type="button" class="btn" data-disp-pid="myopia" data-button-exec="outlineshaded">__outlineshaded__</button>
   <button type="button" class="btn" id="btntrial"   data-button-exec="enterTrial">__enterTrial__</button>
   <div id="btntrialarea" style="display:none;">
diff --git a/src-ui/res/p.en.json b/src-ui/res/p.en.json
index 6edf6da93..d44d7ab15 100644
--- a/src-ui/res/p.en.json
+++ b/src-ui/res/p.en.json
@@ -100,6 +100,7 @@
     "inputmode.circle-shade": "Shaded circles",
     "inputmode.circle-gray": "Gray circles",
     "inputmode.goat": "Goats",
+    "inputmode.sheep": "Sheep",
     "inputmode.wolf": "Wolves",
     "inputmode.moon": "Marks of moon",
     "inputmode.sun": "Marks of sun",
diff --git a/src-ui/res/p.ja.json b/src-ui/res/p.ja.json
index 9aa42447b..ae2bd6dd8 100644
--- a/src-ui/res/p.ja.json
+++ b/src-ui/res/p.ja.json
@@ -94,6 +94,7 @@
     "inputmode.circle-shade": "黒まる",
     "inputmode.circle-gray": "灰まる",
     "inputmode.goat": "ヤギ",
+    "inputmode.sheep": "羊",
     "inputmode.wolf": "オオカミ",
     "inputmode.moon": "月",
     "inputmode.sun": "太陽",
diff --git a/src-ui/res/rules.en.yaml b/src-ui/res/rules.en.yaml
index 856b21a97..51cf000c5 100644
--- a/src-ui/res/rules.en.yaml
+++ b/src-ui/res/rules.en.yaml
@@ -225,6 +225,7 @@ shwolf: "Draw lines over the dotted lines to divide the board into cages.\n1. Ea
 simpleloop: "Draw a loop that goes through every unshaded cell.\n1. The loop cannot branch off or cross itself.\n2. The loop cannot go through shaded cells."
 slalom: "Draw lines through orthogonally adjacent cells to form a directional loop, starting at the circle.\n1. The loop cannot branch off or cross itself.\n2. The loop cannot go through shaded cells.\n3. The loop must visit every gate in the order denoted by the numbers. Some gates have an unknown number.\n4. The loop cannot turn while traveling through a gate.\n5. A gate cannot be visited more than once."
 slither: "Draw lines along the edges of some cells to form a loop.\n1. The loop cannot branch off or cross itself.\n2. A number indicates the amount of edges surrounding the cell that are visited by the loop."
+swslither: "Draw lines along the edges of some cells to form a loop.\n1. The loop cannot branch off or cross itself.\n2. A number indicates the amount of edges surrounding the cell that are visited by the loop.\n3. Sheep must be inside the loop.\n4. Wolves must be outside the loop."
 snake: "Shade some cells into the grid to form a snake.\n1. The snake cannot loop back on itself and visit a cell that's orthogonally or diagonally adjacent to a cell it has visited before.\n2. Black circles must lie on one end of the path.\n 3. White circles must lie somewhere along the path, but not at an end.\n4. A number outside the grid represents how many cells in the corresponding row or column are shaded."
 starbattle: "Place a star into some of the cells.\n1. Stars cannot be horizontally, vertically or diagonally adjacent.\n2. The number at the top of the grid indicates how many stars are in each row, column and outlined region."
 stostone: "Shade some cells on the board to form blocks.\n1. All regions contain exactly one block, which is an orthogonally connected group of shaded cells.\n2. A number indicates the size of the block in the region.\n3. Shaded cells cannot be adjacent across region borders.\n4. If all of the blocks were to fall straight down without changing shape, they must completely fill the bottom half of the grid."
diff --git a/src/puzzle/Config.js b/src/puzzle/Config.js
index e39021a07..f3068ff62 100644
--- a/src/puzzle/Config.js
+++ b/src/puzzle/Config.js
@@ -378,7 +378,7 @@
 					exec = pid === "interbd";
 					break;
 				case "bgcolor":
-					exec = pid === "slither" || pid === "myopia";
+					exec = pid === "slither" || pid === "myopia" || pid === "swslither";
 					break;
 				case "irowake":
 					exec = puzzle.painter.irowake;
diff --git a/src/puzzle/Puzzle.js b/src/puzzle/Puzzle.js
index 94251a5aa..6ed0fb815 100644
--- a/src/puzzle/Puzzle.js
+++ b/src/puzzle/Puzzle.js
@@ -620,7 +620,7 @@
 		if ("bgcolor" in imageopt) {
 			pc2.bgcolor = imageopt.bgcolor;
 		}
-		if (puzzle.pid === "kramma") {
+		if (puzzle.pid === "kramma" || puzzle.pid === "swslither") {
 			pc2.imgtile = puzzle.painter.imgtile;
 		}
 		if ("bank" in imageopt) {
diff --git a/src/pzpr/variety.js b/src/pzpr/variety.js
index 8aee2b626..3e845f15d 100755
--- a/src/pzpr/variety.js
+++ b/src/pzpr/variety.js
@@ -398,6 +398,13 @@
 			sudoku: [0, 1, "数独", "Sudoku"],
 			sukoro: [1, 0, "数コロ", "Sukoro", "sukoro"],
 			sukororoom: [0, 0, "数コロ部屋", "Sukoro-room", "sukoro"],
+			swslither: [
+				0,
+				0,
+				"Sheep Wolf Slitherlink",
+				"Sheep Wolf Slitherlink",
+				"slither"
+			],
 			symmarea: [0, 0, "シンメトリーエリア", "Symmetry Area", "fillomino"],
 			tachibk: [0, 0, "たちあわせブロック", "Tachiawase Block"],
 			tajmahal: [0, 0, "タージ・マハル", "Taj Mahal", "kouchoku"],
diff --git a/src/res/failcode.en.json b/src/res/failcode.en.json
index b31cf6feb..dba119a1e 100644
--- a/src/res/failcode.en.json
+++ b/src/res/failcode.en.json
@@ -682,6 +682,7 @@
     "nmHatenaNe.crossstitch": "A circled question mark does not have any corners used by a loop.",
     "nmIgnored.herugolf": "There is a Hole without a ball.",
     "nmIneqNe.minarism": "A inequality sign is not correct.",
+    "nmInside": "A wolf is inside the loop.",
     "nmLineGt.hashikake": "The number of connecting bridges to a number is not correct.",
     "nmLineGt.kaidan": "The number of blocks adjacent to a number is not correct.",
     "nmLineGt1.amibo": "Multiple lines connect to a white circle.",
@@ -724,6 +725,7 @@
     "nmOutOfBk.oyakodori": "A bird is outside a nest.",
     "nmOutOfBk.yosenabe": "A filling isn't in a crock.",
     "nmOutOfHole.herugolf": "A ball doesn't cup in.",
+    "nmOutside": "A sheep is outside the loop.",
     "nmOutsidePencil.pencils": "A number is not inside a pencil.",
     "nmOutsideTren.tren": "A number is not contained inside a 1x2 or 1x3 block.",
     "nmPillowGt.shugaku": "The number of pillows around the number is wrong.",
diff --git a/src/variety/slither.js b/src/variety/slither.js
index 1f10e09c3..e3fd006c8 100644
--- a/src/variety/slither.js
+++ b/src/variety/slither.js
@@ -7,7 +7,7 @@
 	} else {
 		pzpr.classmgr.makeCustom(pidlist, classbase);
 	}
-})(["slither"], {
+})(["slither", "swslither"], {
 	//---------------------------------------------------------
 	// マウス入力系
 	MouseEvent: {
@@ -62,6 +62,31 @@
 		}
 	},
 
+	"MouseEvent@swslither": {
+		inputModes: {
+			edit: ["sheep", "wolf", "number", "clear", "info-line"],
+			play: [
+				"line",
+				"peke",
+				"bgcolor",
+				"bgcolor1",
+				"bgcolor2",
+				"clear",
+				"info-line"
+			]
+		},
+		mouseinput_other: function() {
+			switch (this.inputMode) {
+				case "sheep":
+					this.inputFixedNumber(5);
+					break;
+				case "wolf":
+					this.inputFixedNumber(6);
+					break;
+			}
+		}
+	},
+
 	//---------------------------------------------------------
 	// キーボード入力系
 	KeyEvent: {
@@ -93,6 +118,10 @@
 		}
 	},
 
+	"Cell@swslither": {
+		maxnum: 6
+	},
+
 	Board: {
 		hasborder: 2,
 		borderAsLine: true,
@@ -115,6 +144,37 @@
 		}
 	},
 
+	"Board@swslither": {
+		scanResult: null,
+		scanInside: function() {
+			if (this.scanResult !== null) {
+				return this.scanResult;
+			}
+
+			var inside = false;
+			this.cell.each(function(cell) {
+				if (cell.adjborder.left.isLine()) {
+					inside = !inside;
+				}
+				cell.inside = inside;
+				if (
+					(cell.id + 1) % cell.board.cols === 0 &&
+					cell.adjborder.right.isLine()
+				) {
+					inside = !inside;
+				}
+			});
+
+			this.scanResult = true;
+			return true;
+		},
+
+		rebuildInfo: function() {
+			this.scanResult = null;
+			this.common.rebuildInfo.call(this);
+		}
+	},
+
 	Border: {
 		updateShaded: function() {
 			var c0 = this.sidecell[0],
@@ -133,6 +193,14 @@
 		}
 	},
 
+	"Border@swslither": {
+		posthook: {
+			line: function() {
+				this.board.scanResult = null;
+			}
+		}
+	},
+
 	LineGraph: {
 		enabled: true
 	},
@@ -149,6 +217,9 @@
 			this.drawBGCells();
 			this.drawLines();
 			this.drawBaseMarks();
+			if (this.pid === "swslither") {
+				this.drawSheepWolf();
+			}
 			this.drawQuesNumbers();
 			this.drawPekes();
 			this.drawTarget();
@@ -160,6 +231,31 @@
 		}
 	},
 
+	"Graphic@swslither": {
+		initialize: function() {
+			this.imgtile = new this.klass.ImageTile();
+			this.common.initialize.call(this);
+		},
+		drawSheepWolf: function() {
+			var g = this.vinc("cell_number_image", "auto");
+			var clist = this.range.cells;
+			for (var i = 0; i < clist.length; i++) {
+				var cell = clist[i];
+				var keyimg = ["cell", cell.id, "quesimg"].join("_");
+				var x = (cell.bx - 1) * this.bw;
+				var y = (cell.by - 1) * this.bh;
+				var tile = cell.qnum >= 5 ? cell.qnum - 5 : null;
+				this.imgtile.putImage(g, keyimg, tile, x, y, this.cw, this.ch);
+			}
+		},
+		getQuesNumberText: function(cell) {
+			if (cell.qnum >= 5) {
+				return "";
+			}
+			return this.common.getQuesNumberText.call(this, cell);
+		}
+	},
+
 	//---------------------------------------------------------
 	// URLエンコード/デコード処理
 	Encode: {
@@ -177,6 +273,14 @@
 			this.fio.encodeCellQnum_kanpen();
 		}
 	},
+	"Encode@swslither": {
+		decodePzpr: function(type) {
+			this.decodeNumber10();
+		},
+		encodePzpr: function(type) {
+			this.encodeNumber10();
+		}
+	},
 	//---------------------------------------------------------
 	FileIO: {
 		decodeData: function() {
@@ -294,13 +398,49 @@
 			"checkdir4BorderLine",
 
 			"checkOneLoop",
-			"checkDeadendLine+"
+			"checkDeadendLine+",
+
+			"checkSheepIn@swslither",
+			"checkWolvesOut@swslither"
 		],
 
 		checkdir4BorderLine: function() {
 			this.checkAllCell(function(cell) {
-				return cell.qnum >= 0 && cell.getdir4BorderLine1() !== cell.qnum;
+				return (
+					cell.qnum >= 0 &&
+					cell.qnum <= 4 &&
+					cell.getdir4BorderLine1() !== cell.qnum
+				);
 			}, "nmLineNe");
+		},
+
+		checkSheepIn: function() {
+			var bd = this.board;
+			if (!bd.scanInside()) {
+				return;
+			}
+			this.checkAllCell(function(cell) {
+				return cell.qnum === 5 && !cell.inside;
+			}, "nmOutside");
+		},
+
+		checkWolvesOut: function() {
+			var bd = this.board;
+			if (!bd.scanInside()) {
+				return;
+			}
+			this.checkAllCell(function(cell) {
+				return cell.qnum === 6 && cell.inside;
+			}, "nmInside");
 		}
+	},
+
+	"ImageTile@swslither": {
+		imgsrc_dataurl:
+			"data:image/webp;base64,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",
+		cols: 2,
+		rows: 1,
+		width: 256,
+		height: 128
 	}
 });
diff --git a/test/script/swslither.js b/test/script/swslither.js
new file mode 100644
index 000000000..5f7839aac
--- /dev/null
+++ b/test/script/swslither.js
@@ -0,0 +1,111 @@
+/* swslither.js */
+
+ui.debug.addDebugData("swslither", {
+	url: "5/5/2c5a2a5c2a136a3c6a3",
+	failcheck: [
+		[
+			"brNoLine",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /"
+		],
+		[
+			"lnBranch",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 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 0 /1 1 0 0 0 0 /1 0 0 0 0 0 /1 0 0 0 0 0 /1 0 0 0 0 0 /1 1 0 0 0 /0 1 0 0 0 /0 0 0 0 0 /1 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /"
+		],
+		[
+			"lnCross",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 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 0 /1 1 0 1 0 0 /1 1 1 0 1 0 /1 1 1 0 1 0 /0 0 0 0 1 0 /1 1 0 0 0 /0 1 1 0 0 /0 0 1 0 0 /0 0 0 0 0 /1 0 1 1 1 /0 0 0 0 0 /"
+		],
+		[
+			"nmLineNe",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 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 0 /1 1 0 1 0 0 /1 1 1 0 0 0 /1 1 1 0 0 0 /0 0 0 0 0 0 /1 1 0 0 0 /0 1 1 0 0 /0 0 1 0 0 /0 0 0 0 0 /1 0 1 1 0 /0 0 0 0 0 /"
+		],
+		[
+			"lnPlLoop",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /1 0 1 1 0 1 /1 1 0 1 0 1 /1 1 1 0 0 1 /1 1 1 1 1 1 /0 0 0 0 1 1 /1 1 0 1 1 /0 1 0 0 0 /0 0 1 0 0 /0 0 0 1 0 /1 0 1 0 0 /0 0 0 0 1 /"
+		],
+		[
+			"lnDeadEnd",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 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 0 /1 1 0 1 0 0 /1 1 1 0 0 1 /1 1 1 1 1 1 /0 0 0 0 1 1 /1 1 1 1 0 /0 1 1 0 0 /0 0 1 0 0 /0 0 0 1 0 /1 0 1 0 0 /0 0 0 0 1 /"
+		],
+		[
+			"nmOutside",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 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 /1 1 0 0 1 1 /1 1 1 0 0 1 /1 1 1 1 1 1 /0 0 0 0 1 1 /1 1 1 1 1 /0 1 1 1 0 /0 0 1 1 0 /0 0 0 1 0 /1 0 1 0 0 /0 0 0 0 1 /"
+		],
+		[
+			"nmInside",
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 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 /1 1 0 1 0 1 /0 0 1 0 0 1 /1 0 0 1 1 1 /0 0 0 0 1 1 /1 1 1 1 1 /0 1 1 0 0 /1 0 1 0 0 /1 1 0 1 0 /1 1 1 0 0 /0 0 0 0 1 /"
+		],
+		[
+			null,
+			"pzprv3.1/swslither/5/5/2 . . . 5 /. 2 . 5 . /. . 2 . 1 /3 6 . 3 . /. . 6 . 3 /0 0 0 0 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 /1 1 0 1 0 1 /1 1 1 0 0 1 /1 1 1 1 1 1 /0 0 0 0 1 1 /1 1 1 1 1 /0 1 1 0 0 /0 0 1 0 0 /0 0 0 1 0 /1 0 1 0 0 /0 0 0 0 1 /"
+		]
+	],
+	inputs: [
+		{ input: ["newboard,5,1", "editmode"] },
+		{
+			input: [
+				"cursor,1,1",
+				"key,-",
+				"key,right",
+				"key,0",
+				"key,right",
+				"key,1",
+				"key,right",
+				"key,2,5",
+				"key,right",
+				"key,1,0,6"
+			],
+			result:
+				"pzprv3.1/swslither/1/5/- 0 1 5 6 /0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /"
+		},
+		{ input: ["newboard,7,2", "editmode"] },
+		{
+			input: [
+				"cursor,0,0",
+				"mouse,leftx2, 0,0",
+				"mouse,leftx3, 2,0",
+				"mouse,leftx4, 4,0",
+				"mouse,leftx5, 6,0",
+				"mouse,leftx6, 8,0",
+				"mouse,leftx7, 10,0",
+				"mouse,leftx9, 12,0",
+				"cursor,0,0",
+				"mouse,rightx2, 0,2",
+				"mouse,rightx3, 2,2",
+				"mouse,rightx4, 4,2",
+				"mouse,rightx5, 6,2",
+				"mouse,rightx6, 8,2",
+				"mouse,rightx7, 10,2",
+				"mouse,rightx9, 12,2"
+			],
+			result:
+				"pzprv3.1/swslither/2/7/- 0 1 2 3 4 6 /6 5 4 3 2 1 - /0 0 0 0 0 0 0 /0 0 0 0 0 0 0 /0 0 0 0 0 0 0 0 /0 0 0 0 0 0 0 0 /0 0 0 0 0 0 0 /0 0 0 0 0 0 0 /0 0 0 0 0 0 0 /"
+		},
+		{ input: ["newboard,5,1", "editmode,sheep"] },
+		{
+			input: [
+				"cursor,0,0",
+				"mouse,left, 0,0",
+				"mouse,leftx2, 2,0",
+				"mouse,leftx3, 4,0",
+				"mouse,rightx2, 6,0",
+				"mouse,right, 8,0"
+			],
+			result:
+				"pzprv3.1/swslither/1/5/5 . 5 . 5 /0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /"
+		},
+		{ input: ["newboard,5,1", "editmode,wolf"] },
+		{
+			input: [
+				"cursor,0,0",
+				"mouse,left, 0,0",
+				"mouse,leftx2, 2,0",
+				"mouse,leftx3, 4,0",
+				"mouse,rightx2, 6,0",
+				"mouse,right, 8,0"
+			],
+			result:
+				"pzprv3.1/swslither/1/5/6 . 6 . 6 /0 0 0 0 0 /0 0 0 0 0 0 /0 0 0 0 0 /0 0 0 0 0 /"
+		}
+	]
+});