r1b1qbnr/2ppkp1p/2n5/1p2p1p1/Np2P1P1/8/P1PPNPBP/1RBQK2R w K - 0 10
FEN state: r1b1qbnr/2ppkp1p/2n5/1p2p1p1/Np2P1P1/8/P1PPNPBP/1RBQK2R w K - 0 10 ; Best move: a4b2
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at d7, black king at e7, black pawn at f7 and black pawn at h7. Black knight at c6. Black pawn at b5, black pawn at e5 and black pawn at g5. White knight at a4, black pawn at b4, white pawn at e4 and white pawn at g4. White pawn at a2, white pawn at c2, white pawn at d2, white knight at e2, white pawn at f2, white bishop at g2 and white pawn at h2. White rook at b1, white bishop at c1, white queen at d1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 10. White to move.