rnb1kr2/ppp5/3ppb2/7p/1P1P1PpP/BP5R/P2KN1P1/RN2QB2 b q - 1 21
FEN state: rnb1kr2/ppp5/3ppb2/7p/1P1P1PpP/BP5R/P2KN1P1/RN2QB2 b q - 1 21 ; Best move: g4h3
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 f8. Black pawn at a7, black pawn at b7 and black pawn at c7. Black pawn at d6, black pawn at e6 and black bishop at f6. Black pawn at h5. White pawn at b4, white pawn at d4, white pawn at f4, black pawn at g4 and white pawn at h4. White bishop at a3, white pawn at b3 and white rook at h3. White pawn at a2, white king at d2, white knight at e2 and white pawn at g2. White rook at a1, white knight at b1, white queen at e1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.