1rb1kbnr/p1pqp1p1/2np1p1p/1p6/P2PN3/2P1PN2/RP2KPPP/2BQ1B1R b k - 0 10
FEN state: 1rb1kbnr/p1pqp1p1/2np1p1p/1p6/P2PN3/2P1PN2/RP2KPPP/2BQ1B1R b k - 0 10 ; Best move: d7e6
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black queen at d7, black pawn at e7 and black pawn at g7. Black knight at c6, black pawn at d6, black pawn at f6 and black pawn at h6. Black pawn at b5. White pawn at a4, white pawn at d4 and white knight at e4. White pawn at c3, white pawn at e3 and white knight at f3. White rook at a2, white pawn at b2, white king at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.