r1bq1b2/pppnkp2/3p2r1/3PP3/1n3BpP/1PP5/P3PK1R/RNQ2BN1 b - - 4 15
FEN state: r1bq1b2/pppnkp2/3p2r1/3PP3/1n3BpP/1PP5/P3PK1R/RNQ2BN1 b - - 4 15 ; Best move: g4g3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black bishop at f8. Black pawn at a7, black pawn at b7, black pawn at c7, black knight at d7, black king at e7 and black pawn at f7. Black pawn at d6 and black rook at g6. White pawn at d5 and white pawn at e5. Black knight at b4, white bishop at f4, black pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at c3. White pawn at a2, white pawn at e2, white king at f2 and white rook at h2. White rook at a1, white knight at b1, white queen at c1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 15. Black to move.