Accordion

Fifty-two spaces read as one long row, piles that move only whole and only onto the pile one or three places to their left, a row that closes up by itself, and a stock that deals onto the first empty space. This is the file the download button gives you. Make a game explains every part of it.

{
  "name": "Accordion",
  "family": "Accordion",
  "aliases": ["Idle Year", "Tower of Babel", "Methuselah"],
  "description": "**Goal:** squeeze the whole deck into **one pile**.\n\n- **Tap the stock** to deal its next card face up onto the end of the row. Deal whenever you like.\n- A pile may move onto the pile **directly to its left**, or **three places to its left**, when their top cards match in **rank or suit**. The whole pile moves, never part of it.\n- The row closes up behind a pile that moves.\n- You win when the stock is spent and a single pile is left.\n- Your **score** is the number of piles left, counting each card still in the stock as one; lower is better, 1 for a win.",
  "depots": [
    { "type": "Stock", "col": 0, "row": 0, "name": "stock", "acceptRule": "none",
      "ejectRule": "locked",
      "actions": [
        { "name": "deal", "when": "!empty(stock) && any(slot, empty(it))",
          "do": [
            { "kind": "flipTop", "depot": "stock" },
            { "kind": "move", "from": "stock", "to": "first(slot, empty(it))" }
          ] }
      ] },
    { "type": "Tableau", "fanDirection": "None", "col": 0, "row": 1, "name": "slot", "repeat": 52,
      "perRow": 13,
      "acceptRule": {
        "when": "(source == neighbour(depot, 1) || source == neighbour(depot, 3)) && !empty(depot) && (top(pile).rank == top.rank || top(pile).suit == top.suit)",
        "reason": "A pile moves onto the pile one or three places to its left, when the top cards match in rank or suit"
      },
      "ejectRule": { "unit": "pile" },
      "triggers": [
        { "when": "empty(depot) && !empty(neighbour(depot, 1))",
          "do": [{ "kind": "compact", "group": "slot" }] }
      ] }
  ],
  "dealRules": [
    { "kind": "move", "from": "stock", "to": "slot-1" },
    { "kind": "flipTop", "depot": "slot-1" }
  ],
  "depotOnly": true,
  "winCondition": { "kind": "expr", "when": "empty(stock) && count(slot, !empty(it)) == 1" },
  "lossCondition": { "kind": "noLegalMoves" },
  "scoring": { "value": "count(slot, !empty(it)) + count(stock)", "better": "Low", "keep": "Over" },
  "tools": "None"
}