r3kbn1/p2b2p1/n1p5/1p1pppq1/1P1PP2p/P1P2P1P/RB3KP1/1N1Q1B1R b q - 1 18
FEN state: r3kbn1/p2b2p1/n1p5/1p1pppq1/1P1PP2p/P1P2P1P/RB3KP1/1N1Q1B1R b q - 1 18 ; Best move: d5e4
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black bishop at d7 and black pawn at g7. Black knight at a6 and black pawn at c6. Black pawn at b5, black pawn at d5, black pawn at e5, black pawn at f5 and black queen at g5. White pawn at b4, white pawn at d4, white pawn at e4 and black pawn at h4. White pawn at a3, white pawn at c3, white pawn at f3 and white pawn at h3. White rook at a2, white bishop at b2, white king at f2 and white pawn at g2. White knight at b1, white queen at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 18. Black to move.