rn3b1r/3bp1pp/p1p2p1n/1p1pk3/1N2P3/B2P1P1P/P1P3P1/RN1QKB1R w K - 4 17
FEN state: rn3b1r/3bp1pp/p1p2p1n/1p1pk3/1N2P3/B2P1P1P/P1P3P1/RN1QKB1R w K - 4 17 ; Best move: d3d4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8 and black rook at h8. Black bishop at d7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at a6, black pawn at c6, black pawn at f6 and black knight at h6. Black pawn at b5, black pawn at d5 and black king at e5. White knight at b4 and white pawn at e4. White bishop at a3, white pawn at d3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at c2 and white pawn at g2. White rook at a1, white knight at b1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 4. Full move number is 17. White to move.