r3k2r/nq2p2p/p2pN2b/2p2bpn/Pp2N2P/1P6/2P1P1B1/R1BQK2R w KQkq - 4 20
FEN state: r3k2r/nq2p2p/p2pN2b/2p2bpn/Pp2N2P/1P6/2P1P1B1/R1BQK2R w KQkq - 4 20 ; Best move: e4d6
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. Black knight at a7, black queen at b7, black pawn at e7 and black pawn at h7. Black pawn at a6, black pawn at d6, white knight at e6 and black bishop at h6. Black pawn at c5, black bishop at f5, black pawn at g5 and black knight at h5. White pawn at a4, black pawn at b4, white knight at e4 and white pawn at h4. White pawn at b3. White pawn at c2, white pawn at e2 and white bishop at g2. White rook at a1, white bishop at c1, white queen at d1, white king at e1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 4. Full move number is 20. White to move.