Chess Position
Position: What should White play?
Nd5
2kr1bnr/pp4pp/5p2/q3p3/2PnP3/2NB4/PP1B1P1P/R2QK2R w KQ -
8
7
6
5
4
3
2
a1
b
c
d
e
f
g
h
0
games in database
52%
28%
20%
⚪ White
½ Draw
⚫ Black
♟
Engine Evaluation
+1.06 d20
Nd5played by
👤
Humans
0%
🧠
Maia AI
0%
♟
Stockfish
#1
FEN
2kr1bnr/pp4pp/5p2/q3p3/2PnP3/2NB4/PP1B1P1P/R2QK2R w KQ - 0 1💡
Why a4 ?📚 Principle violated: Centralization and Piece Activity
❌ a4?? — blunder
EVAL:
[███░░░░░░░]-1.12+1.13 → -1.12 (Loss: -2.25)
💡 Problem with a4:
This move places the a4 on the "rim," where it is poorly placed and fails to address the pressure on the center. It allows Black to seize the initiative immediately with a powerful pin.
⚖️ Comparison
| Coup | Eval | Rule | Verdict |
|---|---|---|---|
| ✅ d5! | +1.13 | ✓ Centralization | Dominates the center and hits f6. |
| ❌ a4?? | -1.12 | ✗ Knight on the Rim | Passive and allows a crushing pin. |
⚡ Opponent's Punishment
After a4:
- →
b4 pins the d2 to the King. - → White loses: Control over the d4 square and faces a devastating attack on the uncastled King.
📚 Lesson: A Knight on the rim is dim; always look for central outposts like d5 first!
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