1nb2bnr/rp2pk2/5p1p/p1ppqP2/P1BPPBp1/2N3P1/RPP4P/3QK1NR b K - 4 13
FEN state: 1nb2bnr/rp2pk2/5p1p/p1ppqP2/P1BPPBp1/2N3P1/RPP4P/3QK1NR b K - 4 13 ; Best move: e5f4
The current state of the chess board is: Black knight at b8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at b7, black pawn at e7 and black king at f7. Black pawn at f6 and black pawn at h6. Black pawn at a5, black pawn at c5, black pawn at d5, black queen at e5 and white pawn at f5. White pawn at a4, white bishop at c4, white pawn at d4, white pawn at e4, white bishop at f4 and black pawn at g4. White knight at c3 and white pawn at g3. White rook at a2, white pawn at b2, white pawn at c2 and white pawn at h2. White queen at d1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 4. Full move number is 13. Black to move.