r1b2k1r/ppBp3p/2n4n/2b5/P2q2p1/1N1P4/1P2PP1P/R2QKB1R w KQ - 4 17
FEN state: r1b2k1r/ppBp3p/2n4n/2b5/P2q2p1/1N1P4/1P2PP1P/R2QKB1R w KQ - 4 17 ; Best move: b3d4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at b7, white bishop at c7, black pawn at d7 and black pawn at h7. Black knight at c6 and black knight at h6. Black bishop at c5. White pawn at a4, black queen at d4 and black pawn at g4. White knight at b3 and white pawn at d3. White pawn at b2, white pawn at e2, white pawn at f2 and white pawn at h2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 4. Full move number is 17. White to move.