Chess Position
Position: What should Black play?
a6
rk5N/pp1b4/1q6/3B1pp1/2R5/1P1P1Q1P/P4PP1/4R1K1 b - -
1
2
3
4
5
6
7
h8
g
f
e
d
c
b
a
0
games in database
52%
28%
20%
⚪ White
½ Draw
⚫ Black
♟
Engine Evaluation
+8.76 d20
a6played by
👤
Humans
0%
🧠
Maia AI
0%
♟
Stockfish
#1
FEN
rk5N/pp1b4/1q6/3B1pp1/2R5/1P1P1Q1P/P4PP1/4R1K1 b - - 0 1💡
Why g4 ?❌ g4?? — blunder
EVAL:
[██████████]M2+8.76 → M2 (Loss: -91.22)
💡 Problem with g4:
This move completely ignores the vulnerability of the 
b8 and the open diagonal. By moving the pawn, you allow the White 
f3 to deliver a devastating check on f4.
⚖️ Comparison
| Coup | Eval | Rule | Verdict |
|---|---|---|---|
| ✅ a6! | +8.76 | ✓ Create Luft | Prevents immediate disaster by challenging the  d5. |
| ❌ g4?? | M2 | ✗ King Safety | Opens the gates for a forced checkmate. |
⚡ Opponent's Punishment
After g4:
- → f4+ forces the response d6 to block the check.
- → White delivers xd6#, ending the game instantly.
📚 Lesson: Always calculate checks and captures for your opponent before making a "quiet" pawn move.
Analyze this position interactively
Get personalized explanations, practice variations, and improve your chess understanding with our AI coach.
Open in WhyThisMove App