4kb1r/2rnppp1/1qpp4/p2n1b2/P1N1BPP1/1PpPB1Rp/3RPK1P/1NQ5 w k - 10 21
FEN state: 4kb1r/2rnppp1/1qpp4/p2n1b2/P1N1BPP1/1PpPB1Rp/3RPK1P/1NQ5 w k - 10 21 ; Best move: e3b6
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at h8. Black rook at c7, black knight at d7, black pawn at e7, black pawn at f7 and black pawn at g7. Black queen at b6, black pawn at c6 and black pawn at d6. Black pawn at a5, black knight at d5 and black bishop at f5. White pawn at a4, white knight at c4, white bishop at e4, white pawn at f4 and white pawn at g4. White pawn at b3, black pawn at c3, white pawn at d3, white bishop at e3, white rook at g3 and black pawn at h3. White rook at d2, white pawn at e2, white king at f2 and white pawn at h2. White knight at b1 and white queen at c1. Black kingside is the only castle move available. Half move number is 10. Full move number is 21. White to move.