rq2kbr1/p3p3/P1p3pn/B2p1P1p/2P1p1P1/1P1P4/1R2N2P/1NQK1B1R b q - 0 23
FEN state: rq2kbr1/p3p3/P1p3pn/B2p1P1p/2P1p1P1/1P1P4/1R2N2P/1NQK1B1R b q - 0 23 ; Best move: h6g4
The current state of the chess board is: Black rook at a8, black queen at b8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7 and black pawn at e7. White pawn at a6, black pawn at c6, black pawn at g6 and black knight at h6. White bishop at a5, black pawn at d5, white pawn at f5 and black pawn at h5. White pawn at c4, black pawn at e4 and white pawn at g4. White pawn at b3 and white pawn at d3. White rook at b2, white knight at e2 and white pawn at h2. White knight at b1, white queen at c1, white king at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 23. Black to move.