1rb4Q/1p1p4/nP4p1/p3p3/Pk2P2p/3P2PB/N4P1P/R1BK2NR b - - 5 21
FEN state: 1rb4Q/1p1p4/nP4p1/p3p3/Pk2P2p/3P2PB/N4P1P/R1BK2NR b - - 5 21 ; Best move: b4a4
The current state of the chess board is: Black rook at b8, black bishop at c8 and white queen at h8. Black pawn at b7 and black pawn at d7. Black knight at a6, white pawn at b6 and black pawn at g6. Black pawn at a5 and black pawn at e5. White pawn at a4, black king at b4, white pawn at e4 and black pawn at h4. White pawn at d3, white pawn at g3 and white bishop at h3. White knight at a2, white pawn at f2 and white pawn at h2. White rook at a1, white bishop at c1, white king at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 5. Full move number is 21. Black to move.