rnb1k1qr/7p/p4pp1/1pppp1P1/1Q5R/N1P2PP1/PP1PP1B1/R1B1K1N1 w Q - 4 18
FEN state: rnb1k1qr/7p/p4pp1/1pppp1P1/1Q5R/N1P2PP1/PP1PP1B1/R1B1K1N1 w Q - 4 18 ; Best move: b4c5
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 queen at g8 and black rook at h8. Black pawn at h7. Black pawn at a6, black pawn at f6 and black pawn at g6. Black pawn at b5, black pawn at c5, black pawn at d5, black pawn at e5 and white pawn at g5. White queen at b4 and white rook at h4. White knight at a3, white pawn at c3, white pawn at f3 and white pawn at g3. White pawn at a2, white pawn at b2, white pawn at d2, white pawn at e2 and white bishop at g2. White rook at a1, white bishop at c1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 4. Full move number is 18. White to move.