r1b3n1/6kr/n2b2p1/ppp1qp1p/1NPP1P1B/P6N/1P2B1PP/R3K2R b KQ - 0 21
FEN state: r1b3n1/6kr/n2b2p1/ppp1qp1p/1NPP1P1B/P6N/1P2B1PP/R3K2R b KQ - 0 21 ; Best move: e5e4
The current state of the chess board is: Black rook at a8, black bishop at c8 and black knight at g8. Black king at g7 and black rook at h7. Black knight at a6, black bishop at d6 and black pawn at g6. Black pawn at a5, black pawn at b5, black pawn at c5, black queen at e5, black pawn at f5 and black pawn at h5. White knight at b4, white pawn at c4, white pawn at d4, white pawn at f4 and white bishop at h4. White pawn at a3 and white knight at h3. White pawn at b2, white bishop at e2, white pawn at g2 and white pawn at h2. White rook at a1, white king at e1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 0. Full move number is 21. Black to move.