r1b1kbn1/1pp3p1/n2pp2r/p1P2p1p/4PN1P/3P4/PPN2PP1/R1BQKBR1 w Q - 0 13
FEN state: r1b1kbn1/1pp3p1/n2pp2r/p1P2p1p/4PN1P/3P4/PPN2PP1/R1BQKBR1 w Q - 0 13 ; Best move: e4f5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at b7, black pawn at c7 and black pawn at g7. Black knight at a6, black pawn at d6, black pawn at e6 and black rook at h6. Black pawn at a5, white pawn at c5, black pawn at f5 and black pawn at h5. White pawn at e4, white knight at f4 and white pawn at h4. White pawn at d3. White pawn at a2, white pawn at b2, white knight at c2, white pawn at f2 and white pawn at g2. White rook at a1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.