1r1q2r1/pppb2Bp/P3p1k1/P1bp1pp1/4NPn1/6PP/R1PQPR2/4KBN1 b - - 4 18
FEN state: 1r1q2r1/pppb2Bp/P3p1k1/P1bp1pp1/4NPn1/6PP/R1PQPR2/4KBN1 b - - 4 18 ; Best move: d5e4
The current state of the chess board is: Black rook at b8, black queen at d8 and black rook at g8. Black pawn at a7, black pawn at b7, black pawn at c7, black bishop at d7, white bishop at g7 and black pawn at h7. White pawn at a6, black pawn at e6 and black king at g6. White pawn at a5, black bishop at c5, black pawn at d5, black pawn at f5 and black pawn at g5. White knight at e4, white pawn at f4 and black knight at g4. White pawn at g3 and white pawn at h3. White rook at a2, white pawn at c2, white queen at d2, white pawn at e2 and white rook at f2. White king at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. Black to move.