r1bq3r/p1pp3p/1pn5/N3p1bk/2BPP3/P2n1pP1/1PP2P1P/RNB2K1R w - - 0 21
FEN state: r1bq3r/p1pp3p/1pn5/N3p1bk/2BPP3/P2n1pP1/1PP2P1P/RNB2K1R w - - 0 21 ; Best move: c1g5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7 and black pawn at h7. Black pawn at b6 and black knight at c6. White knight at a5, black pawn at e5, black bishop at g5 and black king at h5. White bishop at c4, white pawn at d4 and white pawn at e4. White pawn at a3, black knight at d3, black pawn at f3 and white pawn at g3. White pawn at b2, white pawn at c2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.