1r2kq1r/n2b1nbp/pp1pp1p1/2pP4/P1N1P3/1PQ2P1B/2P1K3/R1B3NR w k - 1 21
FEN state: 1r2kq1r/n2b1nbp/pp1pp1p1/2pP4/P1N1P3/1PQ2P1B/2P1K3/R1B3NR w k - 1 21 ; Best move: c3e3
The current state of the chess board is: Black rook at b8, black king at e8, black queen at f8 and black rook at h8. Black knight at a7, black bishop at d7, black knight at f7, black bishop at g7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at d6, black pawn at e6 and black pawn at g6. Black pawn at c5 and white pawn at d5. White pawn at a4, white knight at c4 and white pawn at e4. White pawn at b3, white queen at c3, white pawn at f3 and white bishop at h3. White pawn at c2 and white king at e2. White rook at a1, white bishop at c1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 21. White to move.