rn2k1r1/pb1p1p2/3b3n/2p1p3/2P1P2p/PPQ1K1p1/3P2qP/RNB2BNR b q - 3 21
FEN state: rn2k1r1/pb1p1p2/3b3n/2p1p3/2P1P2p/PPQ1K1p1/3P2qP/RNB2BNR b q - 3 21 ; Best move: g2e4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at g8. Black pawn at a7, black bishop at b7, black pawn at d7 and black pawn at f7. Black bishop at d6 and black knight at h6. Black pawn at c5 and black pawn at e5. White pawn at c4, white pawn at e4 and black pawn at h4. White pawn at a3, white pawn at b3, white queen at c3, white king at e3 and black pawn at g3. White pawn at d2, black queen at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 3. Full move number is 21. Black to move.