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Oct-07-11
 | | Once: <FSR> Your 21. Rg1! line is certainly the best, but I wouldn't say that 21. Qxc3 doesn't work. It's not a forced mate but it should still win for white. After 21. Qxc3 we arrive here:
click for larger viewHow does black defend? If 21...Kg8 then 22. Qa5
click for larger viewBlack doesn't have a good way to prevent Qd8+, so white will win back his sacrificed rook and be a bishop ahead. Fritz evals the position after 22. Qa5 as +4.25. Not as good as your forced mate, but still good enough to win. |
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Oct-07-11
| | Once: <scormus> Fritzie says that your 21. bxc3 line is fine. Not as good as <FSR>'s excellent 21. Rg1, but still enough to win. Here's his top five:
1. 21. Rg1 (#12)
2. 21. Qxc3 (+4.17)
3. 21. b3 (+3.77)
4. 21. b4 (+3.54)
5. 21. bxc3 (+3.37)
After that we get into level positions, but any of the above should bring home the point today. Star move remains 21. Rg1, though. |
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| Oct-07-11 | | sevenseaman: Family activity kept me away from my favorite home page almost the entire day. Sitting on the volcano of 1 move mate, White has a real temptation to make his position safe by a move like b3 or bxc3. I have not analysed how far this reasonable looking defensive action goes but I never am a fan of this kind of approach, specifically in a 'selected' puzzle situation. "Why would it be posed as a problem in that case?" is the kind of gambler mentality that nudges me. So let it be a primed bomb, I have to go for a mate with the priority of a non-stop check of my own. As I always say in a situation like this, <'One who rides a tiger cannot afford to dismount'>. 19. Rxh7 does not promise much on a/c the own P blockage at h2. Therefore it has to be <19. Rg8+> a). <19. Rg8+ Kxg8 20. Rg1+ Kh8 (only move) 21. fxe7+ f6 22. exf8=Q+ Rxf8
23. Qxc3> gives White material advantage and enough control of the board
for an easy win.
b). <19. Rxg8+ Rxg8 20. fxe7+ Rg7 21. e8=Q+ Rxe8 22. Qxc3 Rc8 23. Qf6> again sets up White on a winning path. ~~~~~~~~~~~~~~~~~~~
Ridiculous! Resignation after just one <speculative> move! |
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| Oct-07-11 | | sevenseaman: 22. Qf8+ suggested by <jfp> is even more forceful. But it is only possible in case Black plays f6. I do not think that is a better response by Black than Rg7 there. |
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| Oct-07-11 | | Memethecat: ok lets try <19Rg8+ Kxg8. 20Rg2+ Kh8. 21fxe7+ f6. 22exf8+ Rxf8. 23Qxc3> Blacks is down a B his K is trapped his R can't mv & he's 1 mv away from #, oh & white has a healthy QS pawn majority. The other option <19Rg8+ Rxg8. 20fxe7+ Rg7(best) 21Rg1> (a) <21...Qxb2+. 22Kd1 Qb1+. 23Bc1> & black is lost, he could try <23...Rg8>but<24Qxg7+ Rxg7. 25e8=Q+ Rg8. 26Qxg8#> (b) <21...cxb2+. 22Kb1> & again black is lost. Ok lets see if I've 'lost face' it wouldn't be the 1st time this week. |
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| Oct-07-11 | | CHESSTTCAMPS: This middlegame position features stong competing attacks on the opposing castled kings by both sides. White is a pawn up with the move, but faces the immediate mate threat on b2. Furthermore, white can't take time out for "defense", e.g. 19.bxc3(??) Ba3+ 20.Kd2 Rxc3! and black appears to be winning: the rook can't be taken either way, the white queen has lost access to d3, and the "safe haven" on d2 is crumbling. So white must take full advantage of the en prise bishop on e7 by taking it with tempo. 19.Rg8+!! is the correct forcing continuation:
A) 19... Kxg8 20.Rg1+ Kh8 21.fxe7+ f6 23.exf8=Q+ Rxf8 24.Qxc3 and the extra piece decides. B) 19... Rxg8 20.fxe7+ Rg7 21.Rg1! Qxb2+ (cxb2+ 22.Kb1) 22.Kd1 Qb1+ 23.Bc1 Rcg8 24.e8=Q wins (Rxe8 25.Qxg7#). Time for game review.... |
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Oct-07-11
 | | kevin86: I was looking at Rxh7+,oops,the answer was the OTHER rook sac... White ends up at least a bishop ahead. |
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| Oct-07-11 | | Memethecat: my above post should read (he could try <23...Rcg8>) |
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| Oct-07-11 | | Patriot: Black threatens 19...Qxb2#. So the only moves I seriously considered were Rg8+ and Rxh7+. Rxh7+ runs out of steam. 19.Rg8+
A) 19...Kxg8 20.Rg1+ Kh8 21.fxe7+ f6 22.exf8=Q+ Rxf8 23.Qxc3  B) 19...Rxg8 20.fxe7+ Rg7 21.b3 should handily win, preparing for 22.Rg1. White can always throw in e8=Q as a decoy. |
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| Oct-07-11 | | Memethecat: a lot of strange posts earlier, but eventually <m hassan> & <dzechiel> ironed it all out. If anyone has the time & inclination this is a beautiful combination!
Black to play & mate in 5 
click for larger view |
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Oct-07-11
 | | LIFE Master AJ: Started looking at 19.RxP/h7+, but switched to 19.Rg8+. |
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| Oct-07-11 | | morfishine: <Memethecat> Rubinstein's 'immortal' game starting with <1...Rxc3> 2.gxh4 <2...Rd2!!> |
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| Oct-07-11 | | BOSTER: Everybody can understand that white has a great desire to open a1-h8-the direct way to black king. But before begin any attacking action white has clearly understand black threat to play Qxb2+, and decide the question how to protect himself if they allow black to play this move in order don't spend time for defensive moves like bxc3. And here is the idea:if they can move rook from d1 with check on g1, they can use bishop e3 vs black queen on b1, playing Bc1. So 19.Rg8+ if Rxg8 20.fxe7+ Rg7 21. Rg1 Qxb2+ 22.Kd1 Qb1+ 23. Bc1 Rcg8 24.e8=Q + and white win.
If 19...Kxg8 20.Rg1+ Kh8 21.fxe7+ f6 22.exf8=Q+ Rxf8 23. Qxc3 and white the piece and pawn ahead. Without bishop on e3 you can not play this combo, and I think that without bishop on e3 <Sneaky> would not say <spite check-Qb1+>. |
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| Oct-07-11 | | Memethecat: well spotted <morf> stunning bit of chess eh! |
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Oct-07-11
 | | chrisowen: Ehlvest prizely lock tab king dispense rg8+ donfall sicilian candy castle long tempt file clearance typical notif black <b4 g5> light client or this case e5. |
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Oct-07-11
| | chrisowen: Andersson endgame duelist elects bf3 black coat fox cracks e4 but bleeper b4 is too on the slo side again rg2 b7 dodge am it in creating muscle b2 yet Jaan kiss goodbye rook stream other direct segregate f6 investigation. |
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Oct-07-11
 | | agb2002: I saw this position in a newspaper. So no challenge today again. |
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| Oct-07-11 | | Patriot: <agb2002> You've seen it all! :-) |
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| Oct-07-11 | | ColeTrane: stockfish seen it too |
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| Oct-07-11 | | morfishine: <Memethecat> On your comment: <well spotted <morf> stunning bit of chess eh!> Yes it is stunning! Every time I look at it this game, I think I can save White, but its hopeless. Also, its the only thing I got right today! |
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| Oct-07-11 | | SuperPatzer77: <agb2002: I saw this position in a newspaper. So no challenge today again.> <agb2002> Uuugh! I suggest you get rid of the newspaper so, you can have a challenge to analyzing this game. LOL SuperPatzer77 |
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| Oct-08-11 | | TheBish: Ehlvest vs Ulf Andersson, 1988 White to play (19.?) "Difficult"
I was waiting for Friday's puzzle, only to find out I forgot about Thursday's! Black is threatening mate in one, so White needs a few forcing checks. 19. Rg8+! Rxg8
Or 19...Kxg8 20. Rg1+ Kh8 21. fxe7+ f6 22. exf8=Q+ Rxf8 23. Qxc3. 20. fxe7+ Rg7 21. Rg1!
Better than 21. Qxc3, which was my original move.
21...Qxb2+ 22. Kd1 Qb1+ 23. Bc1 Rcg8 24. Qxg7+ Rxg7 25. e8=Q+ Rg8 26. Rxg8#. |
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| Feb-05-12 | | LawrenceBernstein: Slick #tactics# diagonal opener |
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| Apr-15-16 | | john barleycorn: when did we see Andersson being destroyed in 19 moves? 14....Bxf3?? should have been replaced by 14....b4 as Andersson himself stated.
White cannot exploit b6.
15.Na4 Bxf3 16. gf3 Nd5 with an about balanced position. |
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Sep-28-21
 | | GrahamClayton: Ehlvest's 11. Rd2 defends the c2 square against Andersson's threat of ...b4, but the rook becomes an attacking piece after 17. Rg2. |
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