rnb1k2r/2Bp2p1/pp4p1/2p4p/4pP1P/PPPPP2B/2K5/R1Q1q1NR b q - 4 23
FEN state: rnb1k2r/2Bp2p1/pp4p1/2p4p/4pP1P/PPPPP2B/2K5/R1Q1q1NR b q - 4 23 ; Best move: e1h4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black rook at h8. White bishop at c7, black pawn at d7 and black pawn at g7. Black pawn at a6, black pawn at b6 and black pawn at g6. Black pawn at c5 and black pawn at h5. Black pawn at e4, white pawn at f4 and white pawn at h4. White pawn at a3, white pawn at b3, white pawn at c3, white pawn at d3, white pawn at e3 and white bishop at h3. White king at c2. White rook at a1, white queen at c1, black queen at e1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 23. Black to move.