r1bq2kr/3p3p/pp3Ppn/1Np5/nP3PNb/7P/P1PKP1P1/1RB2BR1 w - - 0 21
FEN state: r1bq2kr/3p3p/pp3Ppn/1Np5/nP3PNb/7P/P1PKP1P1/1RB2BR1 w - - 0 21 ; Best move: g4h6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at g8 and black rook at h8. Black pawn at d7 and black pawn at h7. Black pawn at a6, black pawn at b6, white pawn at f6, black pawn at g6 and black knight at h6. White knight at b5 and black pawn at c5. Black knight at a4, white pawn at b4, white pawn at f4, white knight at g4 and black bishop at h4. White pawn at h3. White pawn at a2, white pawn at c2, white king at d2, white pawn at e2 and white pawn at g2. White rook at b1, white bishop at c1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.