r3kb1r/1p1n1pp1/4p3/1P5p/2Ppb3/P3qNP1/3PP3/RNB1Kn1R b q - 2 21
FEN state: r3kb1r/1p1n1pp1/4p3/1P5p/2Ppb3/P3qNP1/3PP3/RNB1Kn1R b q - 2 21 ; Best move: e3e2
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black knight at d7, black pawn at f7 and black pawn at g7. Black pawn at e6. White pawn at b5 and black pawn at h5. White pawn at c4, black pawn at d4 and black bishop at e4. White pawn at a3, black queen at e3, white knight at f3 and white pawn at g3. White pawn at d2 and white pawn at e2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, black knight at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 21. Black to move.