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| Jul-10-06 | | Castle In The Sky: I thought too much and burned out the synapses, I missed this Monday! |
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| Jul-10-06 | | RandomVisitor: <zb2cr>Nice catch. It appears that I overlooked 25.Qh8+. |
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| Jul-10-06 | | Rocafella: 13.fxg5 14.Bxh7+ Kxh7 15.hxg5+ and Kg8 or Kh8 followed by Qh5 seems a decisive advantage and the reason why black didn't accept the knight sac. |
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| Jul-10-06 | | poachedeggs: Found the sac quickly...then a few minutes to see mate or black loosing both bishop and queen...23. Rg1+ Bg5 24. Rxg5+ ...isn't this the best continuance?... |
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| Jul-10-06 | | joe barnett: yes!! another one in perfect order. the continuation would be something like: 23...Kf7 24. Qh8+, Kf7 25.Rg7# |
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| Jul-10-06 | | YouRang: <poachedeggs: Found the sac quickly...then a few minutes to see mate or black loosing both bishop and queen...23. Rg1+ Bg5 24. Rxg5+ ...isn't this the best continuance?...> Perhaps 24. Bxf5 is a little better. The black bishop an g5 isn't going anywhere, and it can be taken next. |
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| Jul-10-06 | | RandomVisitor: Is this the longest Black can hold out?
22.Rxg7+ Kxg7 23.Rg1+ Bg5 24.Bxf5 Kf8 25.Qh8+ Ke7 26.Qh7 Ke8 27.Rxg5 Qxg5 28.fxg5 h3 29.g6 Kd8 30.g7 Re8 31.Qh4+ Kc7 32.g8Q Bxf5 33.Qf7+ Bd7 34.e6 Rxe6 35.Qg3+ Kd8 36.Qgg7 Rd6 37.Qff8 Kc7 38.Qxd6+ Kb6 39.Qgxd7 Ka6 40.Q7c7 h2 41.Qa3# |
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| Jul-10-06 | | notyetagm: <RandomVisitor> Wow, so are you telling us that the Monday puzzle could be described as "White To Play: Mate in 20"! I saw the standard idea of the <♖xg7 SACRIFICE>, 22 ♖xg7+! ♔xg7 23 ♖g1+, but then I had trouble finding an immediate mate because the Black king can slip away to the queenside via ... ♔e8, ... ♔d7 if White is not careful. Now I feel better. I could not believe that I could not find a simple mating continuation after 23 ♖g1+!. There is no simple mate in that position! |
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| Jul-10-06 | | notyetagm: See McShane's 41 ♖x♗g7! in McShane vs Illescas-Cordoba, 2005 for a simpler example of the <♖xg7! SACRIFICE> theme. After Black recaptured with 41 ... ♔xg7?, 42 ♖g1+ is the first move of a mate in 6 that is not too hard to calculate, unlike the mate in 20(!) that <RandomVisitor> pointed out in this Alekhine game. |
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| Jul-10-06 | | notyetagm: Yet another not too difficult <♖xg7! SACRIFICE> to work out is Houska's excellent 19 ... ♖xb2! from S McGrane vs J Houska, 2006. Her rook sacrifice leads to a quick win, unlike Alekhine's in this game. |
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| Jul-10-06 | | YouRang: <notyetagm><Now I feel better. I could not believe that I could not find a simple mating continuation after 23 g1+!. There is no simple mate in that position!> True. But White can threaten mate such that Black must surrender its queen to escape. I suspect that this is the point of the puzzle. |
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| Jul-10-06 | | notyetagm: <YouRange> But it's Monday! I expected to find at most a mate in 4 or something like that. |
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| Jul-10-06 | | xKinGKooLx: This was easy... I got the initial move in about 1 second and the continuation in about 1 minute. I saw 22. ♖xg7+ ♔xg7 23. ♖g1+ ♗g5 24. ♖xg5+ and Black must give up his queen or be mated. For example... 24. ...♔f8 25. ♕h8+ ♔e(f)7 26. ♖g7#. If instead of 23. ...♗g5 Black blocks with 23. ...♖g6, then 24. ♕xg6+ ♔f8 25. ♕g8#, or 24. ...♔h8 25. ♕g7#. A nice rook sacrifice. It is a good puzzle because it allows you to look at several mating sequences. |
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| Jul-10-06 | | EmperorAtahualpa: I actually had to stare at this puzzle for a bit before I spotted 22.Rxg7+ Kxg7 23.Rg1+! Certainly not the easiest Monday puzzle... |
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| Jul-10-06 | | YouRang: <notyetagm> <But it's Monday! I expected to find at most a mate in 4 or something like that.> I gather that this puzzle was a little harder than the typical Monday puzzle, but not all Monday puzzles are forced mates. Occasionally, it's mate-or-lose-your-queen, like today. :-) |
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| Jul-10-06 | | BishopofBlunder: <kevin86: I miss a Monday puzzle! I guess it's time to turn in my membership card to the human race! lol> I thought we all did that when we became chessplayers. |
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| Jul-10-06 | | unferth: <Richerby: I'm not sure what the `1of8' means but I notice that Alekhine vs Rodriguez Vicente, 1939 is also described as `Panama City 1of8'> One of eight games at an Alekhine simul, I'd guess. |
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| Jul-10-06 | | jperr75108: Pretty impressive for a simul. Hard for a monday, got the first move but not all the variations. |
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| Jul-10-06 | | Fezzik: My biggest surprise here was that there's a chess player named Linares. I thought the tournament was named after a place. Could it be named after the Linares family? |
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| Jul-10-06 | | Fezzik: Random visitor's lines of analysis are precisely what is meant by knowing when to stop. White was just plain winning after 23.Rg1+. Yes, Black could throw the kitchen sink at White, but after White took everything, he was still winning. Black was wise to resign. The mate in 16 is ridiculous. Any human would consider resigning before reaching that position! |
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| Jul-11-06 | | Richerby: <unferth: One of eight games at an Alekhine simul, I'd guess.> For that to be the case, Alekhine would have had to play two 8-board simuls in Panama City in 1939. Of course, that's not impossible. |
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| Jul-11-06 | | Richerby: <fezzik: I thought the tournament was named after a place.> The Linares tournament has that name because it is played in the city of Linares, Spain, yes. (Except this year the first half was played in Mexico.) It's not unusual for people and places to share names. |
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| Jul-11-06 | | notyetagm: <Fezzik: Random visitor's lines of analysis are precisely what is meant by knowing when to stop. ... The mate in 16 is ridiculous. Any human would consider resigning before reaching that position!> <RandomVisitor> was simply showing what the truth was in the position. Black is able to put off being mated for quite some time. I found his post useful because it showed that Black can last much longer than I initially thought. Now that did not make that big of a difference in this position but how many times have you played a speculative sacrifice "assuming" there was no defense to your mate threats and lo and behold your opponent found one? |
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| Jul-12-06 | | unferth: <Richerby: For that to be the case, Alekhine would have had to play two 8-board simuls in Panama City in 1939. Of course, that's not impossible.> more likely, both this game and the other were part of the same simul. |
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| Jul-14-06 | | Richerby: Well, they can't both have been played on board 1 of the same 8-board simul! |
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sac: 22.Rxg7+