2bqk2r/1r2b3/1pn3pp/p2p1p2/2Npnp1P/1P1PPNP1/P1P2R2/RQ1K1B2 w k - 2 21
FEN state: 2bqk2r/1r2b3/1pn3pp/p2p1p2/2Npnp1P/1P1PPNP1/P1P2R2/RQ1K1B2 w k - 2 21 ; Best move: d3e4
The current state of the chess board is: Black bishop at c8, black queen at d8, black king at e8 and black rook at h8. Black rook at b7 and black bishop at e7. Black pawn at b6, black knight at c6, black pawn at g6 and black pawn at h6. Black pawn at a5, black pawn at d5 and black pawn at f5. White knight at c4, black pawn at d4, black knight at e4, black pawn at f4 and white pawn at h4. White pawn at b3, white pawn at d3, white pawn at e3, white knight at f3 and white pawn at g3. White pawn at a2, white pawn at c2 and white rook at f2. White rook at a1, white queen at b1, white king at d1 and white bishop at f1. Black kingside is the only castle move available. Half move number is 2. Full move number is 21. White to move.