1nb2bnr/1p1p3k/2r1pq1p/pPp3p1/2P3P1/N3PP2/P2PB2P/R2QK1NR w K - 0 20
FEN state: 1nb2bnr/1p1p3k/2r1pq1p/pPp3p1/2P3P1/N3PP2/P2PB2P/R2QK1NR w K - 0 20 ; Best move: b5c6
The current state of the chess board is: Black knight at b8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at d7 and black king at h7. Black rook at c6, black pawn at e6, black queen at f6 and black pawn at h6. Black pawn at a5, white pawn at b5, black pawn at c5 and black pawn at g5. White pawn at c4 and white pawn at g4. White knight at a3, white pawn at e3 and white pawn at f3. White pawn at a2, white pawn at d2, white bishop at e2 and white pawn at h2. White rook at a1, white queen at d1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 20. White to move.