r1b1nb1r/p2k1p1p/n1qPp2P/Qpp3p1/2P5/N2P1P2/PPK1N1P1/1R3B1R b - - 2 23
FEN state: r1b1nb1r/p2k1p1p/n1qPp2P/Qpp3p1/2P5/N2P1P2/PPK1N1P1/1R3B1R b - - 2 23 ; Best move: a6b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black king at d7, black pawn at f7 and black pawn at h7. Black knight at a6, black queen at c6, white pawn at d6, black pawn at e6 and white pawn at h6. White queen at a5, black pawn at b5, black pawn at c5 and black pawn at g5. White pawn at c4. White knight at a3, white pawn at d3 and white pawn at f3. White pawn at a2, white pawn at b2, white king at c2, white knight at e2 and white pawn at g2. White rook at b1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 23. Black to move.