rnb2kn1/ppp1p2r/P2p2qb/6p1/R2Pp1PP/1PP5/2Q1NP2/1N2K2R w K - 2 20
FEN state: rnb2kn1/ppp1p2r/P2p2qb/6p1/R2Pp1PP/1PP5/2Q1NP2/1N2K2R w K - 2 20 ; Best move: b1d2
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at e7 and black rook at h7. White pawn at a6, black pawn at d6, black queen at g6 and black bishop at h6. Black pawn at g5. White rook at a4, white pawn at d4, black pawn at e4, white pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at c3. White queen at c2, white knight at e2 and white pawn at f2. White knight at b1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 20. White to move.