rn4nr/bp3k2/2p3p1/pb1p1p2/PPP1pP2/3PR1Pp/4PRB1/1NB1Q2K w - - 0 21
FEN state: rn4nr/bp3k2/2p3p1/pb1p1p2/PPP1pP2/3PR1Pp/4PRB1/1NB1Q2K w - - 0 21 ; Best move: g2e4
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at g8 and black rook at h8. Black bishop at a7, black pawn at b7 and black king at f7. Black pawn at c6 and black pawn at g6. Black pawn at a5, black bishop at b5, black pawn at d5 and black pawn at f5. White pawn at a4, white pawn at b4, white pawn at c4, black pawn at e4 and white pawn at f4. White pawn at d3, white rook at e3, white pawn at g3 and black pawn at h3. White pawn at e2, white rook at f2 and white bishop at g2. White knight at b1, white bishop at c1, white queen at e1 and white king at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.