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greenpawn34 View Profile

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28 Mar '14 01:36

Data Fly
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01 Apr '14 10:27
Tricky. I will need some time to think about that one.
greenpawn34
e4
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01 Apr '14 12:16
That is a famous one.
Teach someone to play Chess and they can mate in 6 from this position.

FEN K1k5/P1Pp4/1p1P4/8/p7/P2P4/8/8 w - - 0 1
Invert Board PGN Headers Comments

[FEN "K1k5/P1Pp4/1p1P4/8/p7/P2P4/8/8 w - - 0 1"]

1. d4 {Only legal move.} 1... b5 {Only legal move.} 2. d5 {Only legal move.} 2... b4 {Only legal move.} 3. axb4 {Only legal move.} 3... a3 {Only legal move.} 4. b5 {Only legal move.} 4... a2 {Only legal move.} 5. b6 {Only legal move.} 5... a1=Q {Only legal move - taking Rook, Knight or Bishop makes no difference.} 6. b7# {Only legal move and checkmate.}

OK my shot. Give me an hour or so to come up with one.
SwissGambit
Caninus Interruptus
2014.05.01
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92274
01 Apr '14 19:15
Originally posted by Data Fly
Here we go:
[fen]8/8/3k4/8/8/8/PPPPPPPP/KQ6 w - - 0 1[/fen]

SwissGambit's example sent me in the wrong direction (as it was probably intended to!).
I wanted an example to show what an IC is; I did not want it to have the same idea as the problem for solving, since that would just give it away. 🙂
greenpawn34
e4
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01 Apr '14 22:09
OK I'm back.

This was a possible position from a Kasparov - Korchnoi game.

White to play and win. (the obvious 1.b7 meets 1...Ra7)
thaughbaer
Duckfinder General
223b Baker Street
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01 Apr '14 22:21
Originally posted by greenpawn34
OK I'm back.

This was a possible position from a Kasparov - Korchnoi game.

[fen]4k3/6K1/1P6/8/1p6/8/r7/6R1 w - - 0 41[/fen]
White to play and win. (the obvious 1.b7 meets 1...Ra7)
1. kh8 ?
greenpawn34
e4
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01 Apr '14 23:00
No..look again.
thaughbaer
Duckfinder General
223b Baker Street
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01 Apr '14 23:07
Originally posted by greenpawn34
No..look again.
It seemed daft enough to work at the time.
tvochess
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02 Apr '14 07:20
GP, does Rg4 work? It ties the black rook to defend the pawn on b4, allowing the white pawn to queen. OR, black allows white to capture the pawn.
Mephisto2
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02 Apr '14 08:01
1. b7 and then the 'obvious' Ra7
2. Re1+ Kd8
3. Re7+
Data Fly
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0
02 Apr '14 09:371 edit
Originally posted by greenpawn34
This was a possible position from a Kasparov - Korchnoi game.
Or possibly a study by Jindrich Fritz in 1953.
greenpawn34
e4
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02 Apr '14 10:401 edit
Originally posted by greenpawn34
OK I'm back.

This was a possible position from a Kasparov - Korchnoi game.

[fen]4k3/6K1/1P6/8/1p6/8/r7/6R1 w - - 0 41[/fen]
White to play and win. (the obvious 1.b7 meets 1...Ra7)
FEN 4k3/6K1/1P6/8/1p6/8/r7/6R1 w - - 0 41
Invert Board PGN Headers Comments

[FEN "4k3/6K1/1P6/8/1p6/8/r7/6R1 w - - 0 41"]

41. b7 Ra7 {Now White breaks the pin.} 42. Re1+ Kd8 {Keeping the b-pawn pinned.} 43. Re7 {And wins.}
Rank outsider
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02 Apr '14 15:20
Originally posted by greenpawn34
[pgn]
[FEN "4k3/6K1/1P6/8/1p6/8/r7/6R1 w - - 0 41"]

41. b7 Ra7 {Now White breaks the pin.} 42. Re1+ Kd8 {Keeping the b-pawn pinned.} 43. Re7 {And wins.} [/pgn]
All correct except for comment on Re7.

I think you meant 'Faff around for 20 moves bemoaning the fact that you never bothered to learn QvR endgame, then offer draw'.
SwissGambit
Caninus Interruptus
2014.05.01
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02 Apr '14 15:29
Originally posted by Rank outsider
All correct except for comment on Re7.

I think you meant 'Faff around for 20 moves bemoaning the fact that you never bothered to learn QvR endgame, then offer draw'.
I think it was GM Soltis who pointed out that QvR tends to be too quick a win for the Q side in human play. In other words, the R guy is the one who needs to know the theory.
greenpawn34
e4
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02 Apr '14 16:413 edits
In the study/problem world any book win/draw is taken as such.
but Rank Outside is correct. A lot of these KQ v KR endings are drawn.

I have 393 such endings on RHP - 101 were drawn. (approx 25% )

This pattern crops up quite a few times as a drawing method.

ydnas -HFRAtomHeartDude RHP 2011Game 8410760

White played 87.Rf3+ and 88. KxR is Stalemate.

Sometimes all you need to defend is your opponents bad play.

Slappy Stan - RedHotHermione RHP 2011 Game 8260921

Black played 68...Kh1. 67.QxR Stalemate (67. KxR wins)

You can simply just give up.

Erebos - snjortp RHP 2011 Game 8362178

White had faffed about for a few moves -
decided he was getting nowhere and played 67. QxR+ ½-½

And then of course you can faff about for your full allocated 50 moves.

Game 7594926 Quirine - caissad4 RHP 2012
RHP informs us: '50 moves without a capture or pawn move Game drawn.'

This idea appeared a few times in that game and was missed.

FEN 6K1/R7/5k2/6q1/8/8/8/8 w - - 0 112
Invert Board PGN Headers Comments

[FEN "6K1/R7/5k2/6q1/8/8/8/8 w - - 0 112"]
[EndDate "2012.11.12"]
112. Kh8 Qh4+ 113. Kg8 Qg3+ {Kf1 then Qb8 mate.} 114. Kh7 Qh2+ 115. Kg8 Qb8+
SwissGambit
Caninus Interruptus
2014.05.01
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92274
02 Apr '14 17:26
Originally posted by greenpawn34
[b]In the study/problem world any book win/draw is taken as such.
but Rank Outside is correct. A lot of these KQ v KR endings are drawn.

I have 393 such endings on RHP - 101 were drawn. (approx 25% )

This pattern crops up quite a few times as a drawing method.

ydnas -HFRAtomHeartDude RHP 2011Game 8410760

[fen]8/8/8/8/8/4qk2/6R ...[text shortened]... 112. Kh8 Qh4+ 113. Kg8 Qg3+ {Kf1 then Qb8 mate.} 114. Kh7 Qh2+ 115. Kg8 Qb8+ [/pgn]
[/b]
What happens if white blocks check - 2.Rh7. ?

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