r5nr/4p2p/p1n3kb/2p3p1/PpP3P1/1P2P3/2bN1P1P/R1B1KBNR b K - 4 20
FEN state: r5nr/4p2p/p1n3kb/2p3p1/PpP3P1/1P2P3/2bN1P1P/R1B1KBNR b K - 4 20 ; Best move: a8d8
The current state of the chess board is: Black rook at a8, black knight at g8 and black rook at h8. Black pawn at e7 and black pawn at h7. Black pawn at a6, black knight at c6, black king at g6 and black bishop at h6. Black pawn at c5 and black pawn at g5. White pawn at a4, black pawn at b4, white pawn at c4 and white pawn at g4. White pawn at b3 and white pawn at e3. Black bishop at c2, white knight at d2, white pawn at f2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 4. Full move number is 20. Black to move.