4kbnr/1pq1pp2/1r1pb2p/p1pn2p1/2PP2P1/PP2PP1B/4K2P/RNBQ2NR w k - 3 15
FEN state: 4kbnr/1pq1pp2/1r1pb2p/p1pn2p1/2PP2P1/PP2PP1B/4K2P/RNBQ2NR w k - 3 15 ; Best move: c4d5
The current state of the chess board is: Black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black queen at c7, black pawn at e7 and black pawn at f7. Black rook at b6, black pawn at d6, black bishop at e6 and black pawn at h6. Black pawn at a5, black pawn at c5, black knight at d5 and black pawn at g5. White pawn at c4, white pawn at d4 and white pawn at g4. White pawn at a3, white pawn at b3, white pawn at e3, white pawn at f3 and white bishop at h3. White king at e2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 3. Full move number is 15. White to move.