1r2kbnr/pbp1p1p1/2n2p2/1P1N3p/P1pP1P1P/3R4/QB2P1P1/2K2BNR b k - 0 18
FEN state: 1r2kbnr/pbp1p1p1/2n2p2/1P1N3p/P1pP1P1P/3R4/QB2P1P1/2K2BNR b k - 0 18 ; Best move: c4d3
The current state of the chess board is: Black rook at b8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at c7, black pawn at e7 and black pawn at g7. Black knight at c6 and black pawn at f6. White pawn at b5, white knight at d5 and black pawn at h5. White pawn at a4, black pawn at c4, white pawn at d4, white pawn at f4 and white pawn at h4. White rook at d3. White queen at a2, white bishop at b2, white pawn at e2 and white pawn at g2. White king at c1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.