1rb1k3/p2pppr1/2p5/2p3p1/1q1P2nN/P3B3/1P2PPBP/2RKR3 w - - 0 21
FEN state: 1rb1k3/p2pppr1/2p5/2p3p1/1q1P2nN/P3B3/1P2PPBP/2RKR3 w - - 0 21 ; Best move: a3b4
The current state of the chess board is: Black rook at b8, black bishop at c8 and black king at e8. Black pawn at a7, black pawn at d7, black pawn at e7, black pawn at f7 and black rook at g7. Black pawn at c6. Black pawn at c5 and black pawn at g5. Black queen at b4, white pawn at d4, black knight at g4 and white knight at h4. White pawn at a3 and white bishop at e3. White pawn at b2, white pawn at e2, white pawn at f2, white bishop at g2 and white pawn at h2. White rook at c1, white king at d1 and white rook at e1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.