1nbqk2r/r1pp4/1p2p1pp/p2n3R/PB1P4/1P2P1b1/RQPK2P1/1N3B2 w k - 4 17
FEN state: 1nbqk2r/r1pp4/1p2p1pp/p2n3R/PB1P4/1P2P1b1/RQPK2P1/1N3B2 w k - 4 17 ; Best move: b4a3
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black king at e8 and black rook at h8. Black rook at a7, black pawn at c7 and black pawn at d7. Black pawn at b6, black pawn at e6, black pawn at g6 and black pawn at h6. Black pawn at a5, black knight at d5 and white rook at h5. White pawn at a4, white bishop at b4 and white pawn at d4. White pawn at b3, white pawn at e3 and black bishop at g3. White rook at a2, white queen at b2, white pawn at c2, white king at d2 and white pawn at g2. White knight at b1 and white bishop at f1. Black kingside is the only castle move available. Half move number is 4. Full move number is 17. White to move.