1nbk2nr/rp1pbp1p/4p1p1/p1p3N1/1P5P/2PP4/P3PPPR/R1BQKBN1 w Q - 1 10
FEN state: 1nbk2nr/rp1pbp1p/4p1p1/p1p3N1/1P5P/2PP4/P3PPPR/R1BQKBN1 w Q - 1 10 ; Best move: b4c5
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at d8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at b7, black pawn at d7, black bishop at e7, black pawn at f7 and black pawn at h7. Black pawn at e6 and black pawn at g6. Black pawn at a5, black pawn at c5 and white knight at g5. White pawn at b4 and white pawn at h4. White pawn at c3 and white pawn at d3. White pawn at a2, white pawn at e2, white pawn at f2, white pawn at g2 and white rook at h2. White rook at a1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 10. White to move.