1rbqkb2/pp3pp1/Q1npr3/2p1p1Np/2P1P3/5P2/1PNP2PP/1RB1KB1R b K - 5 15
FEN state: 1rbqkb2/pp3pp1/Q1npr3/2p1p1Np/2P1P3/5P2/1PNP2PP/1RB1KB1R b K - 5 15 ; Best move: b7a6
The current state of the chess board is: Black rook at b8, black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at b7, black pawn at f7 and black pawn at g7. White queen at a6, black knight at c6, black pawn at d6 and black rook at e6. Black pawn at c5, black pawn at e5, white knight at g5 and black pawn at h5. White pawn at c4 and white pawn at e4. White pawn at f3. White pawn at b2, white knight at c2, white pawn at d2, white pawn at g2 and white pawn at h2. White rook at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 5. Full move number is 15. Black to move.