r1bk2n1/qp1p3r/n7/p1p1N1pp/PbP3pP/1PB1p3/4BP1R/1R2K1N1 w - - 2 21
FEN state: r1bk2n1/qp1p3r/n7/p1p1N1pp/PbP3pP/1PB1p3/4BP1R/1R2K1N1 w - - 2 21 ; Best move: c3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8 and black knight at g8. Black queen at a7, black pawn at b7, black pawn at d7 and black rook at h7. Black knight at a6. Black pawn at a5, black pawn at c5, white knight at e5, black pawn at g5 and black pawn at h5. White pawn at a4, black bishop at b4, white pawn at c4, black pawn at g4 and white pawn at h4. White pawn at b3, white bishop at c3 and black pawn at e3. White bishop at e2, white pawn at f2 and white rook at h2. White rook at b1, white king at e1 and white knight at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. White to move.