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Player: Australia  Zahnarzt Subject: Last Position


2011-07-07 12:39:02
Here’s my last position for you. I’m not a fan of 3 move composed positions generally because they’re too hard. Tricky to compose too, perhaps taking hundreds of hours. However the history of this position is extraordinary and it’s worth persevering with the problem. In the March 1983 edition of Shakhmatny, inconspicuously appearing as No 23 of the “originals “ section this postion was posted:
1q5R/P2N4/5p2/2p2p2/2Pk1b1n/6P1/PNpP1P1K/BQ3R1B w
8
7
6
5
4
3
2
1
ABCDEFGH

White mates in 3. See what you can make of it.
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112Australia  Zahnarzt2011-07-09 08:23:58
Thank\'s cooljojo. It\'s sort of broke since you can\'t add any new comments to that forum. So I put wiggle2\'s problem on \"2nd position\" forum.

113Australia  Zahnarzt2011-07-15 23:18:22
Starting a solution with something as obvious and “vulgar” as a capture is not considered good form in problem composition. If 1.Rxh4 is the key then you should be searching for something out of the ordinary in the solution to justify the ugly key.

114Australia  Zahnarzt2011-07-17 13:51:34
Oh dear. Here is a hint RiverTam. It is actually a mate in 4 and not a mate in 3 as I stated. I had meticulously checked and double checked the diagram, but I had remembered it as being a 3 mover. Sorry to mess everybody around.

115Australia  Zahnarzt2011-07-19 08:06:04
Yes, cooljojo is very smart. Hard to believe he’s only 11. I wonder if it really is the peanuts? I’m still trying to do wiggle2’s problem, but it’s too hard for me. The caption under this diagram, in Cyrillic alphabet said, “Estj task Babsona?”. My Russian is not very good, but there’s a hint there somewhere.

116Australia  Zahnarzt2011-07-19 23:45:34
RiverTam, if you’re a fan of underpromotion you’re going to love this. Look at all of the possibilities.

117Australia  Zahnarzt2011-07-20 10:59:48
cooljojo your first premise in #16 is faulty.

118Australia  Zahnarzt2011-07-26 12:11:02
Well done guys. The rook capture does limit Black’s possibilities. Now what can he do?

119Australia  Zahnarzt2011-07-26 15:06:38
You move so delicately RiverTam. Who would have thought you could be so lethal? You\'re heading right for the money.

120Australia  Zahnarzt2011-07-28 12:18:29
True cooljojo!! Now what does White do?

121Australia  Zahnarzt2011-08-04 14:52:34
You\'ve all gone quiet so here is a hint. #23 RiverTam posed a very significant question. If you get the answer to this you\'ll crack the whole problem

122Australia  Zahnarzt2011-08-05 11:24:36
Look at #22 RiverTam\'s comment guys. Then consider #23

123Australia  Zahnarzt2011-08-05 15:43:06
As I understand it, #22 RiverTam claims that 1.Rxh4 cxb1(=Q) 2.axb8(=Q) Qxb2 (so that 3.Qd6+?? Kxc4)but 3.Qb3 mates next move. What do you think rup3? On the other hand, I would point out that 1.Rxh4 Qxb2?? 2.Qxc2 Qc3 3.Qxc3 is mate or 2... Qxa1 3.Rxf4# both make it too easy for White.

124Australia  Zahnarzt2011-08-06 00:51:05
Yes RiverTam I can\'t refute your line. But before you start to get cocky I want to point out that 1.Rxh4 cxb1(=B!) 2.axb8(=Q) Be4 3.Qb3 Bxd2 will wipe the smiles of dawning enlightenment off of your faces. They won\'t come back if White tries underpromoting to a rook either.

125Australia  Zahnarzt2011-08-06 07:27:13
Good try extopian, but 3... Bxd6 kills it I think.

126Australia  Zahnarzt2011-08-07 01:15:59
#45 Quite right RiverTam, 4.Qd3 is still mate. I stand corrected. However 3...Bxg3+ foils White\'s attempt - I think. As for 2.axb8(=B), you may be onto something there. How about if Black plays 1... cxb1(=N)?

127Australia  Zahnarzt2011-08-26 13:54:38
This position was the penultimate in studies and compositions with underpromotion, which started with the famous Saavedra position. A hundred years ago J N Babson an American composer and lover of the grotesque, attempted the foolhardy. An idea not attempted, though considered, by composing greats such as Henri Rinck. A combined Black and White “all-conversion”. The idea is that 1. White moves, Black promotes to Q, R, B or N 2. White promotes to Q, R, B or N respectively 3. Black moves but White mates. As always there must not be multiple solutions! This is the idea of the “Babson”. Some tried valiantly and failed miserably. The position of this post, as I said earlier, was published without fanfare, inconspicuously in a Russian magazine in 1983 with a caption that I think says “Is this the Babson?” It was composed by a C-grade Russian soccer coach, Yarosh.

128Australia  Zahnarzt2011-08-26 14:05:55
The stubble on my chin when I started this post has now grown below my waist. Sorry guys, I’ve been a bit mean but RiverTam knocked out most of the solution so long ago that I thought you would have it all any minute. To summarise so far:
1q5R/P2N4/5p2/2p2p2/2Pk1b1n/6P1/PNpP1P1K/BQ3R1B w
8
7
6
5
4
3
2
1
ABCDEFGH

Mate in Four RiverTam has correctly pointed out that 1.Rxh4 cxb1=Q 2.axb8=Q Qxb2 3.Qb3 Qc3 4.Qxc3# or 2... Qe4 3.Qxf4 Qxf4 4.Rxf4# and also 1.Rxh4 cxb1=R 2.axb8=R Rxb2 3.Rb3 Kxc4 4.Rxf4# RiverTam showed us too that 1.Rxh4 cxb1=B 2.axb8=B Be4 3.Bxf4 Bxh1 4.Be3# Going by my last post then, you should be able to work out how White will respond to 1... cxb1=N. Or do you want me to do all the work?

129Australia  Zahnarzt2011-08-28 00:28:54

130Australia  Zahnarzt2011-08-28 00:40:53
The rook had to be there for some reason.

131Australia  Zahnarzt2011-08-29 11:23:25
True wiggle Mind you I did have to double check and clarify a few things on the way.

132Australia  Zahnarzt2011-08-29 12:06:09
I had to clarify my own mistake, that it was a mate in 4, not 3; also that RiverTam was on the right track since players did not seem to realise it, and I had to check for myself that the other tries that some players suggested did not work. Every time I made a post I was trying to clarify some point that someone brought up, I think.

133Australia  Zahnarzt2011-08-29 12:09:28
I\'ve got a puzzle with a good story , but much easier, that I\'ll put on later for you wiggle.

134Australia  Zahnarzt2011-08-30 12:14:51
mostly from famous books

135Australia  Zahnarzt2011-08-30 12:21:43
Since you\'re hungry for more wiggle, here\'s another just for you. Yarosh wasn\'t happy with the last position because of the clumsy key move. So he composed another two. Here\'s his last and the ultimate Babson:
3r4/2R1P2N/p3Bp2/K2PkP2/1P5P/2p1P3/pBp1R3/Q2N4 w
8
7
6
5
4
3
2
1
ABCDEFGH

Mate in four. Now that you know what to expect it shouldn\'t take you too long.

136Australia  Zahnarzt2011-08-31 13:06:10
Yes wiggle, it\'s another Babson. That means that White moves, Black promotes to Q, R, B or N then White promotes to Q, R, B or N respectively. So you have to work out a first move for White, Black promotes his pawn to Q, White promotes his pawn to Q and then work out a forced checkmate. Then do the same for R, N and B and you\'ve finished It\'s a standard convention in composed problems, as opposed to positions from real games, that White always moves first. Did you and cooljojo like living in America or is it better in China?

137Australia  Zahnarzt2011-09-01 12:52:37
No your key move is wrong wiggle. So try another one Yes it\'s definitely mate in 4.

138Australia  Zahnarzt2011-09-04 11:57:56
All of the answers are above wiggle, you just need to look a little closer. They are: 1.Nxc3 c1=Q 2.exd8=Q Qxc3 3.Nxf6!(well done cooljojo) Qd4 4.Rxe4# or 2... Qxe3 3.Rc4 Qe4 4.Rxe4# Then rook promotion 1... c1=R 2.exd8=R Rxc3 3.Nxf6 Kxf6 4.Bxc3#

139Australia  Zahnarzt2011-09-04 11:58:08
Bishop promotion 1... c1=B 2.exd8=B Bxe3 3.Rc4 Kd6 4.Ne4# and lastly knight promotion 1... c1=N 2.exd8=N Nb3+ 3.Kb6 and 4.Nf7# with windmill correctly pointing out these lines. Most of the checks that are worrying you, wiggle, can\'t be played because of pins limiting Black\'s range of moves.

140Australia  Zahnarzt2011-09-04 12:06:45
These two Babson positions and the whole Babson story is in a book called \"Chess Curiosities\" by Tim Krabbe. You wanted to know where I got my problems from wiggle. I would have mentioned it before but it\'s very hard to find now. Apparently my copy is worth more than the rest of my chess book collection together. I saw just one second hand copy in average condition on Amazon for $350.

141Australia  Zahnarzt2011-09-05 14:01:58
Yes extopian, a pretty line.

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