2r1k2r/2p2pbp/1pb1p1pn/p2p4/1PnP1q1P/P4N2/RB2PPPR/Q3KBN1 w k - 2 21
FEN state: 2r1k2r/2p2pbp/1pb1p1pn/p2p4/1PnP1q1P/P4N2/RB2PPPR/Q3KBN1 w k - 2 21 ; Best move: e2e3
The current state of the chess board is: Black rook at c8, black king at e8 and black rook at h8. Black pawn at c7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at b6, black bishop at c6, black pawn at e6, black pawn at g6 and black knight at h6. Black pawn at a5 and black pawn at d5. White pawn at b4, black knight at c4, white pawn at d4, black queen at f4 and white pawn at h4. White pawn at a3 and white knight at f3. White rook at a2, white bishop at b2, white pawn at e2, white pawn at f2, white pawn at g2 and white rook at h2. White queen at a1, white king at e1, white bishop at f1 and white knight at g1. Black kingside is the only castle move available. Half move number is 2. Full move number is 21. White to move.