r1b1kb2/1ppn1ppr/p1np4/4p2p/P4q1P/3PPPPR/RPP1K1B1/1NB2QN1 w q - 0 13
FEN state: r1b1kb2/1ppn1ppr/p1np4/4p2p/P4q1P/3PPPPR/RPP1K1B1/1NB2QN1 w q - 0 13 ; Best move: g3f4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at b7, black pawn at c7, black knight at d7, black pawn at f7, black pawn at g7 and black rook at h7. Black pawn at a6, black knight at c6 and black pawn at d6. Black pawn at e5 and black pawn at h5. White pawn at a4, black queen at f4 and white pawn at h4. White pawn at d3, white pawn at e3, white pawn at f3, white pawn at g3 and white rook at h3. White rook at a2, white pawn at b2, white pawn at c2, white king at e2 and white bishop at g2. White knight at b1, white bishop at c1, white queen at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.