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32 members have voted

Gialmere
Gialmere
Joined: Nov 26, 2018
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February 13th, 2021 at 6:56:52 AM permalink
Quote: teliot

Quote: Gialmere


Mate is not possible for white with optimal black strategy, unless I'm missing a rule.



1. Rxr is stalemate.
1. Re1, rxR is stalemate.
1. Rd1, rxR is stalemate.
1. Nd1, rxN, 2. Rxr is stalemate.
1. Nd1, rxN, 2. Rb1, rxR is a draw.
1. Nd1, rxN, 2. Kb1, rxR is a draw.



If,
1) Nd1 ... RxN

Then,
2) RxR ... Ne1
3) RxN++

Not optimal for Black.
Have you tried 22 tonight? I said 22.
unJon
unJon
Joined: Jul 1, 2018
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February 13th, 2021 at 7:04:08 AM permalink
Quote: teliot

Quote: Gialmere


Mate is not possible for white with optimal black strategy, unless I'm missing a rule.

1. Rxr is stalemate.
1. Re1, rxR is stalemate.
1. Rd1, rxR is stalemate.
1. Nd1, rxN, 2. Rxr is stalemate.
1. Nd1, rxN, 2. Rb1, rxR is a draw.
1. Nd1, rxN, 2. Kb1, rxR is a draw.



I think one of those is wrong. But doing in my head which is always risky.


1. Nd1
2. rxN
3. Rxr
4. Ne1
5. Rxk mate

Alternatively:
1. Nd1
2. re1
3. Rb1
4. rf1
5. Nxr
6. ne1
7. Rxn
8. Kg1
9. Nh1 mate

The race is not always to the swift, nor the battle to the strong; but that is the way to bet.
teliot
teliot
Joined: Oct 19, 2009
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February 13th, 2021 at 7:07:36 AM permalink
Quote:


If,
1) Nd1 ... RxN

Then,
2) RxR ... Ne1
3) RxN++

Not optimal for Black.


Thanks -- hard to get ordinary chess out of my head.
Poetry website: www.totallydisconnected.com
charliepatrick
charliepatrick
Joined: Jun 17, 2011
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February 13th, 2021 at 8:32:09 AM permalink
Quote: unJon


1. Nd1
2. rxN
3. Rxr
4. Ne1
5. Rxk mate

Alternatively:
1. Nd1
2. re1
3. Rb1
4. rf1
5. Nxr
6. ne1
7. Rxn
8. Kg1
9. Nh1 mate

1. Nd1
2. re1
3. Rb1
4. rf1
5. Nxr
K R _ _ _ N n k
This is mate as the N puts the black KIng in check and the n can't take N nor the king move.
ThatDonGuy
ThatDonGuy
Joined: Jun 22, 2011
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February 13th, 2021 at 9:14:09 AM permalink

The longest match is 7 moves:
1. Nd
2. Ne
3. Nxf+
4. Kg
5 Rd
6. Nc
7. Nh mate

Alternatives:
The only first moves are Rd, Re, Rxf, and Nd
Rxf is stalemate (the only black move is Ne, but that puts the king in check)
Re Rxe / Nd Rxd mate for black
Rd Rxd / Nxd Ne leads to White King, space, space, White Knight, Black Knight, space, space, Black King; I am pretty sure this ends up in a draw
Rd Re / Rxe Nxe / Nd gets to the same position

Nd has three responses: Ne, Re, and Rxd
Nd Rxe / Rxd Ne / Rxe mate for white (5 moves)
Nd Re / Kb Rf / Nxf mate for white (5 moves)

Gialmere
Gialmere
Joined: Nov 26, 2018
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February 13th, 2021 at 9:37:10 AM permalink
Quote: ThatDonGuy


The longest match is 7 moves:
1. Nd
2. Ne
3. Nxf+
4. Kg
5 Rd
6. Nc
7. Nh mate

Alternatives:
The only first moves are Rd, Re, Rxf, and Nd
Rxf is stalemate (the only black move is Ne, but that puts the king in check)
Re Rxe / Nd Rxd mate for black
Rd Rxd / Nxd Ne leads to White King, space, space, White Knight, Black Knight, space, space, Black King; I am pretty sure this ends up in a draw
Rd Re / Rxe Nxe / Nd gets to the same position

Nd has three responses: Ne, Re, and Rxd
Nd Rxe / Rxd Ne / Rxe mate for white (5 moves)
Nd Re / Kb Rf / Nxf mate for white (5 moves)



White's fourth move (7. Nh mate) is illegal.
Have you tried 22 tonight? I said 22.
chevy
chevy
Joined: Apr 15, 2011
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Thanks for this post from:
Gialmere
February 13th, 2021 at 10:37:55 AM permalink


If the (black) knight moves, then White (1) N, n (2) Nxr #, k (3) Rxn, k (4) N ## (K _ R N n r _ k; K _ R _ n N k _; K _ _ _ R N _ k)

If I understand your notation correctly, I "think" after (3) Rxn.....Black king can't move to h.....thus stalemate???





The longest match is 7 moves:
1. Nd
2. Ne
3. Nxf+
4. Kg
5 Rd
6. Nc<-----------------Check on White's King....so can't do move 7. Need Kb.
7. Nh mate




1.WN(d)
2.BN(e)
3.WN(f)- take rook - check on Black
4.BK(g)
5.WR(d)
6.BN(c) - check on White
7.WK(b)
8.BN(e)
9.WN(h)
10.BK(h)
11.WR(e) - take knight - checkmate

ThatDonGuy
ThatDonGuy
Joined: Jun 22, 2011
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February 13th, 2021 at 10:38:15 AM permalink
Quote: Gialmere

Quote: ThatDonGuy


The longest match is 7 moves:
1. Nd
2. Ne
3. Nxf+
4. Kg
5 Rd
6. Nc
7. Nh mate

Alternatives:
The only first moves are Rd, Re, Rxf, and Nd
Rxf is stalemate (the only black move is Ne, but that puts the king in check)
Re Rxe / Nd Rxd mate for black
Rd Rxd / Nxd Ne leads to White King, space, space, White Knight, Black Knight, space, space, Black King; I am pretty sure this ends up in a draw
Rd Re / Rxe Nxe / Nd gets to the same position

Nd has three responses: Ne, Re, and Rxd
Nd Rxe / Rxd Ne / Rxe mate for white (5 moves)
Nd Re / Kb Rf / Nxf mate for white (5 moves)



White's fourth move (7. Nh mate) is illegal.



I get 13:
1. Nd
2. Ne
3. Nxf+
4. Kg
5. Rd
6. Nc+
7. Kb
8. Ne
9. Ka
10. Kxg
11. Rb
12. either Nc or Kg
13. Rxc (after Nc) or (Rxe (after Kg), both mate

Gialmere
Gialmere
Joined: Nov 26, 2018
  • Threads: 41
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February 13th, 2021 at 11:42:00 AM permalink
Quote: chevy



1.WN(d)
2.BN(e)
3.WN(f)- take rook - check on Black
4.BK(g)
5.WR(d)
6.BN(c) - check on White
7.WK(b)
8.BN(e)
9.WN(h)
10.BK(h)
11.WR(e) - take knight - checkmate



Correct!

6 moves it is.

If Black plays optimally, White has no room for error. There is, however, a path that threads its way through the minefield.


------------------------------------

Have you tried 22 tonight? I said 22.
Ace2
Ace2
Joined: Oct 2, 2017
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February 15th, 2021 at 3:52:30 PM permalink
Suppose you roll a fair die until some face has appeared six times. For instance, your rolls could be 42132253261242 (for six 2's).

On average, how many rolls would it take?
Itís all about making that GTA

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