1rbnkbr1/pp1p2p1/B4p2/2P2P1p/2PPp3/PPB3PP/8/RN2K1NR b KQ - 2 21
FEN state: 1rbnkbr1/pp1p2p1/B4p2/2P2P1p/2PPp3/PPB3PP/8/RN2K1NR b KQ - 2 21 ; Best move: b7a6
The current state of the chess board is: Black rook at b8, black bishop at c8, black knight at d8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at b7, black pawn at d7 and black pawn at g7. White bishop at a6 and black pawn at f6. White pawn at c5, white pawn at f5 and black pawn at h5. White pawn at c4, white pawn at d4 and black pawn at e4. White pawn at a3, white pawn at b3, white bishop at c3, white pawn at g3 and white pawn at h3. White rook at a1, white knight at b1, white king at e1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 2. Full move number is 21. Black to move.