r1b4q/1ppp2p1/p3nkN1/2r1b3/2PP1p1P/4P3/PP2P1P1/1NRK1B1R w - - 5 21
FEN state: r1b4q/1ppp2p1/p3nkN1/2r1b3/2PP1p1P/4P3/PP2P1P1/1NRK1B1R w - - 5 21 ; Best move: g6h8
The current state of the chess board is: Black rook at a8, black bishop at c8 and black queen at h8. Black pawn at b7, black pawn at c7, black pawn at d7 and black pawn at g7. Black pawn at a6, black knight at e6, black king at f6 and white knight at g6. Black rook at c5 and black bishop at e5. White pawn at c4, white pawn at d4, black pawn at f4 and white pawn at h4. White pawn at e3. White pawn at a2, white pawn at b2, white pawn at e2 and white pawn at g2. White knight at b1, white rook 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 5. Full move number is 21. White to move.