r2qkbn1/p1pnpppr/b7/1p3P1p/1P1p2P1/P3PK2/R1PP3P/1NBQ2NR w q - 0 13
FEN state: r2qkbn1/p1pnpppr/b7/1p3P1p/1P1p2P1/P3PK2/R1PP3P/1NBQ2NR w q - 0 13 ; Best move: g4g5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at c7, black knight at d7, black pawn at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black bishop at a6. Black pawn at b5, white pawn at f5 and black pawn at h5. White pawn at b4, black pawn at d4 and white pawn at g4. White pawn at a3, white pawn at e3 and white king at f3. White rook at a2, white pawn at c2, white pawn at d2 and white pawn at h2. White knight at b1, 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 0. Full move number is 13. White to move.