r3k2r/p1p2p2/n2ppq1p/4Pbpn/1p1NB1P1/N4P1R/PPPP1Q2/R1B1K3 w - - 0 21
FEN state: r3k2r/p1p2p2/n2ppq1p/4Pbpn/1p1NB1P1/N4P1R/PPPP1Q2/R1B1K3 w - - 0 21 ; Best move: e4c6
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at f7. Black knight at a6, black pawn at d6, black pawn at e6, black queen at f6 and black pawn at h6. White pawn at e5, black bishop at f5, black pawn at g5 and black knight at h5. Black pawn at b4, white knight at d4, white bishop at e4 and white pawn at g4. White knight at a3, white pawn at f3 and white rook at h3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at d2 and white queen at f2. White rook at a1, white bishop at c1 and white king at e1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.