r3q1nr/p2pk2p/b2p1p1b/1p2pPpP/2PP2P1/3K3B/nB2P3/R2Q2NR b - - 5 20
FEN state: r3q1nr/p2pk2p/b2p1p1b/1p2pPpP/2PP2P1/3K3B/nB2P3/R2Q2NR b - - 5 20 ; Best move: a6b7
The current state of the chess board is: Black rook at a8, black queen at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at d7, black king at e7 and black pawn at h7. Black bishop at a6, black pawn at d6, black pawn at f6 and black bishop at h6. Black pawn at b5, black pawn at e5, white pawn at f5, black pawn at g5 and white pawn at h5. White pawn at c4, white pawn at d4 and white pawn at g4. White king at d3 and white bishop at h3. Black knight at a2, white bishop at b2 and white pawn at e2. White rook at a1, white queen 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 20. Black to move.