r1bqkbnr/1pp1pppp/3p4/pN6/QnP4P/3PP3/PP3PP1/R1B1KBNR w k - 5 10
FEN state: r1bqkbnr/1pp1pppp/3p4/pN6/QnP4P/3PP3/PP3PP1/R1B1KBNR w k - 5 10 ; Best move: b5d6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at d6. Black pawn at a5 and white knight at b5. White queen at a4, black knight at b4, white pawn at c4 and white pawn at h4. White pawn at d3 and white pawn at e3. White pawn at a2, white pawn at b2, white pawn at f2 and white pawn at g2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 5. Full move number is 10. White to move.