r2qk1r1/p2pp3/b1n3p1/2p5/pPP3P1/N2P3p/3K1b1P/RNB3RQ b q - 3 21
FEN state: r2qk1r1/p2pp3/b1n3p1/2p5/pPP3P1/N2P3p/3K1b1P/RNB3RQ b q - 3 21 ; Best move: f2g1
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black rook at g8. Black pawn at a7, black pawn at d7 and black pawn at e7. Black bishop at a6, black knight at c6 and black pawn at g6. Black pawn at c5. Black pawn at a4, white pawn at b4, white pawn at c4 and white pawn at g4. White knight at a3, white pawn at d3 and black pawn at h3. White king at d2, black bishop at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white rook at g1 and white queen at h1. Black queenside is the only castle move available. Half move number is 3. Full move number is 21. Black to move.