1r2k1n1/4p1br/pp1qb1p1/7p/1PNp2P1/N1PP2PQ/P6P/1RBK1B1R w - - 1 21
FEN state: 1r2k1n1/4p1br/pp1qb1p1/7p/1PNp2P1/N1PP2PQ/P6P/1RBK1B1R w - - 1 21 ; Best move: c4d6
The current state of the chess board is: Black rook at b8, black king at e8 and black knight at g8. Black pawn at e7, black bishop at g7 and black rook at h7. Black pawn at a6, black pawn at b6, black queen at d6, black bishop at e6 and black pawn at g6. Black pawn at h5. White pawn at b4, white knight at c4, black pawn at d4 and white pawn at g4. White knight at a3, white pawn at c3, white pawn at d3, white pawn at g3 and white queen at h3. White pawn at a2 and white pawn at h2. White rook at b1, white bishop at c1, white king at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. White to move.