rnb2bn1/3p1p2/1p5r/p1p2kPp/1P1PpP2/P5P1/qBPNP3/R1Q1KBNR b Q - 2 20
FEN state: rnb2bn1/3p1p2/1p5r/p1p2kPp/1P1PpP2/P5P1/qBPNP3/R1Q1KBNR b Q - 2 20 ; Best move: a2b2
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black bishop at f8 and black knight at g8. Black pawn at d7 and black pawn at f7. Black pawn at b6 and black rook at h6. Black pawn at a5, black pawn at c5, black king at f5, white pawn at g5 and black pawn at h5. White pawn at b4, white pawn at d4, black pawn at e4 and white pawn at f4. White pawn at a3 and white pawn at g3. Black queen at a2, white bishop at b2, white pawn at c2, white knight at d2 and white pawn at e2. White rook at a1, white queen at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White queenside is the only castle move available. Half move number is 2. Full move number is 20. Black to move.