[luke warm]

1}

---

S..........W..........N..........E
--------------------P..........P
1S.........P.........2S.........P
4S-------------

2}

---

S..........W..........N..........E
1H..........P.........2C.........P
3C..........P.........3H.........P
4H

3}

---

N...........E..........S..........W
--...........--........1C..........P
1D.........P.........1H..........P
3H.........P..........4H

4}

---

S..........W..........N..........E
1S.........P..........3S........P
4S

5}

---

N..........E..........S..........W
---.......1NT.......2H (natural) all pass

6}

---

N..........E..........S..........W
1D........P..........1H.........P
3D........P..........3H..........P
4H.... all pass

7}

---

S..........W..........N..........E
--.........--..........1C.........P
1H........P...........2H.........P
2NT.......P..........3H........P
4H

8}

---

S..........W..........N..........E
1S.........P..........1NT.........P
2H.......P...........3H........P
4H all pass

9}

---

S..........W...........N..........E
1H.........P...........2D.........P
2H.........P............3H all pass

10}

---

S..........W..........N..........E
1H...... all pass

[ochinko]

Spoiler

1. DK - fighting for control of the trump
2. C3 - partner will ruff at least once, hopefully twice
3. D5 - my turn to ruff now
4. Sp3 - this is the toughest one, I could be wrong
5. H5 - probably wrong, but I'm flying blind
6. Sp3 - take our tricks before delarer's losers are discarded on the clubs
7. H3 - when declarer runs from nt, it's sometimes best to take out the trumps
8. HA, K, 3 - what you're gonna do without trumps in dummy?
9. Sp2 - againg forcing play, hoping that partner has four trumps
10. Sp8 - strongest suit, partner must have something

I'm going to look at Justin's answers now, prepared to slap myself on the forehead: "Why didn't I think of that?"

[cherdano]

Ok, let me try (and I won't claim that any of these is automatic this time ):

Spoiler

1) ♦K
2) ♣3 (regardless of leading agreements, this is suit preference situation)
3) ♦5
4) I think at IMPs, leading ♥ 7 is clear, as it gives the best chance to beat it (any single one of ♠K, ♥A, _♦K, ♣A with partner is enough, and ♦Q gives a chance). At MP, i would still do the same.
5) spade
6) spade
7) If 2NT was a slam try, then I can't see how this can go down. I don't like any lead and would choose a heart.
8) ♥A
9) club
10) club

[luke warm]

ok, here's what ewen says... hope you enjoyed

1}

---

S..........W..........N..........E
--------------------P..........P
1S.........P.........2S.........P
4S-------------

♦K... you want to try to play a forcing game with 4 trumps

2}

---

S..........W..........N..........E
1H..........P.........2C.........P
3C..........P.........3H.........P
4H

♣3... partner has one at most and is probably void.. you have a quick trump entry, so suit pref for a diamond

3}

---

N...........E..........S..........W
--...........--........1C..........P
1D.........P.........1H..........P
3H.........P..........4H

♦5... you can stop declarer's trump drawing because of the ace... so hope for an entry in pard's hand and one, or two, ruffs

4}

---

S..........W..........N..........E
1S.........P..........3S........P
4S

♥7... this one is tough, but he says that with even one entry in pard's hand you can set this... your 2 aces, a ruff, pard's trick... so even with 4 trumps this time, try for the ruff

5}

---

N..........E..........S..........W
---.......1NT.......2H (natural) all pass

♥5... try to cut down declarer's most likely source of tricks - ruffs

6}

---

N..........E..........S..........W
1D........P..........1H.........P
3D........P..........3H..........P
4H.... all pass

♠3... because of dummy's long, probably strong, diamonds (based on yours), try to attack before declarer's losers disappear

7}

---

S..........W..........N..........E
--.........--..........1C.........P
1H........P...........2H.........P
2NT.......P..........3H........P
4H

♥6 (or 8 if you're me )... they don't look very confident, go passive and try not to help them

8}

---

S..........W..........N..........E
1S.........P..........1NT.........P
2H.......P...........3H........P
4H all pass

♥K... dummy is short in spades, you can take 3 of his trumps out and *maybe* make a spade trick or two of your own

9}

---

S..........W...........N..........E
1H.........P...........2D.........P
2H.........P............3H all pass

♠4 (or 2, if you're me )... trumps look to split badly, so partner might like a forcing game

10}

---

S..........W..........N..........E
1H...... all pass

♥4... partner would usually balance here, so he might have some hearts of his own... try to keep declarer from using any of dummy's trumps for ruffs

[luke warm]

yeah right justin... i don't notice bobby asking ME to play with him

[Chamaco]

My choices

Spoiler

1) DK
2) C8, play for 2 C ruffs in pard's hand (I'll signal suit preference for D)
3) low C
4) low C
5) Club Ten
6) Low Club
7) Trump lead, they have stretched and 44 fit, let's avoid ruffs without giving away tricks on lead
8) J of clubs
9) low spade, try to force declarer (pard might be have long trumps)
10) Anything I lead may help declarer to make a VERY VALUABLE free finesse that he could not take otherwise because dummy likely has no entries.
I would be tempted to lead a trump but I fear this helps declarer for the abovementioned reason.
So I'll lead a low diamond.