r1bqk2B/pp1pbr1R/n5p1/P1p5/2PP1P2/1P6/3NPKn1/R3QBN1 w - - 1 21
FEN state: r1bqk2B/pp1pbr1R/n5p1/P1p5/2PP1P2/1P6/3NPKn1/R3QBN1 w - - 1 21 ; Best move: e1b1
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and white bishop at h8. Black pawn at a7, black pawn at b7, black pawn at d7, black bishop at e7, black rook at f7 and white rook at h7. Black knight at a6 and black pawn at g6. White pawn at a5 and black pawn at c5. White pawn at c4, white pawn at d4 and white pawn at f4. White pawn at b3. White knight at d2, white pawn at e2, white king at f2 and black knight at g2. White rook at a1, white queen at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. White to move.