rnb1kbn1/pp2ppr1/6p1/1qpp3P/1P5P/P1NKPP2/2PP2B1/R1BQ2NR w q - 1 15
FEN state: rnb1kbn1/pp2ppr1/6p1/1qpp3P/1P5P/P1NKPP2/2PP2B1/R1BQ2NR w q - 1 15 ; Best move: c3b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at e7, black pawn at f7 and black rook at g7. Black pawn at g6. Black queen at b5, black pawn at c5, black pawn at d5 and white pawn at h5. White pawn at b4 and white pawn at h4. White pawn at a3, white knight at c3, white king at d3, white pawn at e3 and white pawn at f3. White pawn at c2, white pawn at d2 and white bishop at g2. White rook at a1, white bishop at c1, white queen at d1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 15. White to move.