explore_chess_package.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "miniature-password",
   "metadata": {},
   "source": [
    "# Chess Package Exploration"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "internal-contrary",
   "metadata": {},
   "source": [
    "import chess\n",
    "import chess.engine\n",
    "import copy"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "sitting-brand",
   "metadata": {},
   "outputs": [],
   "source": [
    "board = chess.Board()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "married-gender",
   "metadata": {},
   "source": [
    "## Chess Board Vizualization"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "ideal-uncertainty",
   "metadata": {},
   "outputs": [
    {
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0-1.055-.649-1.656-.64-.602-1.773-.602zm-1.578-.672q-1.016-.25-1.586-.945-.563-.695-.563-1.695 0-1.399.993-2.211 1-.813 2.734-.813 1.742 0 2.734.813.993.812.993 2.21 0 1-.57 1.696-.563.695-1.571.945 1.14.266 1.773 1.04.641.773.641 1.89 0 1.695-1.04 2.602-1.03.906-2.96.906t-2.969-.906Q6 26.738 6 25.043q0-1.117.64-1.89.641-.774 1.782-1.04zm-.578-2.492q0 .906.562 1.414.57.508 1.594.508 1.016 0 1.586-.508.578-.508.578-1.414 0-.906-.578-1.414-.57-.508-1.586-.508-1.023 0-1.594.508-.562.508-.562 1.414z\" /></g></svg>"
      ],
      "text/plain": [
       "Board('rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1')"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "board"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "motivated-theology",
   "metadata": {},
   "source": [
    "## String representation of Chess Board"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "professional-liability",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      "P P P P P P P P\n",
      "R N B Q K B N R\n"
     ]
    }
   ],
   "source": [
    "print(board)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "simplified-spiritual",
   "metadata": {},
   "source": [
    "## _board.turn_ exploration\n",
    "We can identify whose turn it is using __board.turn__. \n",
    "- If it is _True_ , then its _WHITE turn_\n",
    "- If it is _False_ , then its _BLACK turn_.\n",
    "\n",
    "This can be proved by equating it with __chess.WHITE__."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "temporal-spine",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "board.turn"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "moderate-budapest",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "board.turn == chess.WHITE"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "subtle-dallas",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "board.turn == chess.BLACK"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "upset-makeup",
   "metadata": {},
   "source": [
    "## *board.piece_at* exploration"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "comfortable-youth",
   "metadata": {},
   "source": [
    "This function is used to check which piece is present at any specific column."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "civilian-happening",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "image/svg+xml": [
       "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" viewBox=\"0 0 45 45\" width=\"45\" height=\"45\"><g id=\"white-bishop\" class=\"white bishop\" fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><g fill=\"#fff\" stroke-linecap=\"butt\"><path d=\"M9 36c3.39-.97 10.11.43 13.5-2 3.39 2.43 10.11 1.03 13.5 2 0 0 1.65.54 3 2-.68.97-1.65.99-3 .5-3.39-.97-10.11.46-13.5-1-3.39 1.46-10.11.03-13.5 1-1.354.49-2.323.47-3-.5 1.354-1.94 3-2 3-2zM15 32c2.5 2.5 12.5 2.5 15 0 .5-1.5 0-2 0-2 0-2.5-2.5-4-2.5-4 5.5-1.5 6-11.5-5-15.5-11 4-10.5 14-5 15.5 0 0-2.5 1.5-2.5 4 0 0-.5.5 0 2zM25 8a2.5 2.5 0 1 1-5 0 2.5 2.5 0 1 1 5 0z\" /></g><path d=\"M17.5 26h10M15 30h15m-7.5-14.5v5M20 18h5\" stroke-linejoin=\"miter\" /></g></svg>"
      ],
      "text/plain": [
       "Piece.from_symbol('B')"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "board.piece_at(chess.C1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "geographic-anime",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "image/svg+xml": [
       "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" viewBox=\"0 0 45 45\" width=\"45\" height=\"45\"><g id=\"black-bishop\" class=\"black bishop\" fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M9 36c3.39-.97 10.11.43 13.5-2 3.39 2.43 10.11 1.03 13.5 2 0 0 1.65.54 3 2-.68.97-1.65.99-3 .5-3.39-.97-10.11.46-13.5-1-3.39 1.46-10.11.03-13.5 1-1.354.49-2.323.47-3-.5 1.354-1.94 3-2 3-2zm6-4c2.5 2.5 12.5 2.5 15 0 .5-1.5 0-2 0-2 0-2.5-2.5-4-2.5-4 5.5-1.5 6-11.5-5-15.5-11 4-10.5 14-5 15.5 0 0-2.5 1.5-2.5 4 0 0-.5.5 0 2zM25 8a2.5 2.5 0 1 1-5 0 2.5 2.5 0 1 1 5 0z\" fill=\"#000\" stroke-linecap=\"butt\" /><path d=\"M17.5 26h10M15 30h15m-7.5-14.5v5M20 18h5\" stroke=\"#fff\" stroke-linejoin=\"miter\" /></g></svg>"
      ],
      "text/plain": [
       "Piece.from_symbol('b')"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "board.piece_at(chess.C8)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "wired-bidder",
   "metadata": {},
   "source": [
    "## Legal moves"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "entitled-legislature",
   "metadata": {},
   "source": [
    "We can identify all legal moves at any given point using *board.legal_moves*"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "hazardous-secondary",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<LegalMoveGenerator at 0x7f067c289cd0 (Nh3, Nf3, Nc3, Na3, h3, g3, f3, e3, d3, c3, b3, a3, h4, g4, f4, e4, d4, c4, b4, a4)>"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "board.legal_moves"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "bound-austria",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<SimpleEngine (pid=71)>"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "engine = chess.engine.SimpleEngine.popen_uci(\"./stockfish_13_linux_x64_bmi2\")\n",
    "engine"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "worthy-reviewer",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'string': 'NNUE evaluation using nn-62ef826d1a6d.nnue enabled',\n",
       " 'depth': 10,\n",
       " 'seldepth': 11,\n",
       " 'multipv': 1,\n",
       " 'score': PovScore(Cp(+32), WHITE),\n",
       " 'nodes': 5783,\n",
       " 'nps': 525727,\n",
       " 'tbhits': 0,\n",
       " 'time': 0.011,\n",
       " 'pv': [Move.from_uci('d2d4'), Move.from_uci('d7d5')],\n",
       " 'upperbound': True}"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "move = engine.analyse(board, chess.engine.Limit(time=0.01, depth=20))\n",
    "move"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "resistant-creature",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "32"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "cp = chess.engine.PovScore(move['score'], chess.WHITE).pov(chess.WHITE).relative.score()\n",
    "cp"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "lasting-airfare",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[Move.from_uci('d2d4'), Move.from_uci('d7d5')]"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "move.get('pv')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "still-hampton",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Move: g1h3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . N\n",
      "P P P P P P P P\n",
      "R N B Q K B . R\n",
      "\n",
      "\n",
      "Move: g1f3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . N . .\n",
      "P P P P P P P P\n",
      "R N B Q K B . R\n",
      "\n",
      "\n",
      "Move: b1c3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . N . . . . .\n",
      "P P P P P P P P\n",
      "R . B Q K B N R\n",
      "\n",
      "\n",
      "Move: b1a3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      "N . . . . . . .\n",
      "P P P P P P P P\n",
      "R . B Q K B N R\n",
      "\n",
      "\n",
      "Move: h2h3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . P\n",
      "P P P P P P P .\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: g2g3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . P .\n",
      "P P P P P P . P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: f2f3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . P . .\n",
      "P P P P P . P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: e2e3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . P . . .\n",
      "P P P P . P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: d2d3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . P . . . .\n",
      "P P P . P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: c2c3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . P . . . . .\n",
      "P P . P P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: b2b3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". P . . . . . .\n",
      "P . P P P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: a2a3\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      "P . . . . . . .\n",
      ". P P P P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: h2h4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . . P\n",
      ". . . . . . . .\n",
      "P P P P P P P .\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: g2g4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . . P .\n",
      ". . . . . . . .\n",
      "P P P P P P . P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: f2f4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . . P . .\n",
      ". . . . . . . .\n",
      "P P P P P . P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: e2e4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . . P . . .\n",
      ". . . . . . . .\n",
      "P P P P . P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: d2d4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . . P . . . .\n",
      ". . . . . . . .\n",
      "P P P . P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: c2c4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". . P . . . . .\n",
      ". . . . . . . .\n",
      "P P . P P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: b2b4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      ". P . . . . . .\n",
      ". . . . . . . .\n",
      "P . P P P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n",
      "Move: a2a4\n",
      "r n b q k b n r\n",
      "p p p p p p p p\n",
      ". . . . . . . .\n",
      ". . . . . . . .\n",
      "P . . . . . . .\n",
      ". . . . . . . .\n",
      ". P P P P P P P\n",
      "R N B Q K B N R\n",
      "\n",
      "\n"
     ]
    }
   ],
   "source": [
    "for move in board.legal_moves:\n",
    "    print(\"Move:\", move)\n",
    "    copied_board_instance = copy.copy(board)\n",
    "    copied_board_instance.push(move)\n",
    "    print(copied_board_instance)\n",
    "    print(\"\\n\")"
   ]
  }
 ],
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