r1b1k1rb/2pn3p/1p2p2n/p1Pp1pPp/3P1PQ1/P3P3/RP1K2P1/1NB3NR w q - 3 18
FEN state: r1b1k1rb/2pn3p/1p2p2n/p1Pp1pPp/3P1PQ1/P3P3/RP1K2P1/1NB3NR w q - 3 18 ; Best move: g4h5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black rook at g8 and black bishop at h8. Black pawn at c7, black knight at d7 and black pawn at h7. Black pawn at b6, black pawn at e6 and black knight at h6. Black pawn at a5, white pawn at c5, black pawn at d5, black pawn at f5, white pawn at g5 and black pawn at h5. White pawn at d4, white pawn at f4 and white queen at g4. White pawn at a3 and white pawn at e3. White rook at a2, white pawn at b2, white king at d2 and white pawn at g2. White knight at b1, white bishop at c1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 3. Full move number is 18. White to move.