{
  "id": "overhand-shuffle",
  "description": "Run blocks off the top; block order reversed, order within each block kept",
  "labels": {
    "en": "Overhand Shuffle",
    "es": "Barajada por Encima",
    "fr": "Mélange par Dessus",
    "de": "Überhand-Mischen"
  },
  "family_ref": "true-shuffles",
  "action_contract": {
    "parameters": {
      "technique": {
        "required": false,
        "description": "Named variant; hindu absorbs 0.4's hindu-shuffle (D5)",
        "domain": [
          "overhand",
          "hindu"
        ]
      }
    },
    "post_state_invariant": "target's cards leave the top in a run of blocks; the blocks arrive in reverse of the order they were run off in, and each block keeps its own internal relative order.",
    "post_state": {
      "state_schema_ref": "https://tamaraspec.org/schema/tcs-playing-cards-state-0.1.json",
      "effects": [
        {
          "op": "permute",
          "subject": "target",
          "permutation": "block_reverse"
        }
      ]
    }
  }
}