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Apr-21-18
 | | FSR: 34...Qxg1+! 35.Qxg1 (35.Kxg1? Rxg4 36.Qxg4 Rg8 0-1) Rxg4 36.Qxg4 (if the queen moves away, it appears that 36...Rag8 wins in all cases) a2 37.Qd1 (or 37.Qg1) Rxb4 (intending 38...Rb1) wins. |
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Apr-21-18
| | FSR: Didn't look far enough: 37.Qg1! Rxb4 38.Qa7! Rb1+ 39.Kg2 a1=Q 40.Qxf7+ with a perpetual check. |
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| Apr-21-18 | | NBZ: Yup I thought after finding Qxg1 that it was 0-1 for sure, Qg1! followed by Qa7! is a great save. |
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| Apr-21-18 | | pdxjjb: Before the puzzle position, white misses the very strong 33 bxa4. A line involving a similar looking sham sacrifice leaves the surviving black rook unable to stop the a-pawn. (Found by engine.) |
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Apr-21-18
 | | Penguincw: I never thought I'd still be in it this far into the week, and I'm still here. I did consider 34...Qxg1+ 35.Qxg1 Rxg4 36.Qxg4, but that's it. Well, can't believe I'd say this, but bring it on Sunday puzzle. ---
< dakgootje: Always nice when you get the puzzle of your birthday, especcially when its a saturday ;-) > I was born on a Monday. :) |
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Apr-21-18
 | | al wazir: Got it -- except that I thought black had a win. I didn't see the perpetual. |
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Apr-21-18
| | al wazir: I see I looked at this game previously, so I can't count it. I must have unconsciously remembered the solution from 12 years ago, |
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Apr-21-18
 | | perfidious: This POTD is classed as 'very difficult', but what else could Christiansen have had at move 34 in view of the threats? |
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| Apr-21-18 | | jith1207: <penguincw>: you were not born anywhere closer to Sunday (;
Neither did I. Actually I did on Tuesday (Monday in western world), which makes sense. |
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| Apr-21-18 | | jith1207: Same as <Al Wazir>, I thought there must be some swindle for white but could not come up with it. |
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| Apr-21-18 | | whiteshark: and <37...Rxb4 38.Qa7 Rb1+ 39.Kg2 a1=Q 40.Qxf7+ Kh8 41.Qf8+> is the obvious end. |
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| Apr-21-18 | | diagonalley: <al wazir> ... me too (as usual!) |
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| Apr-21-18 | | Cheapo by the Dozen: <al wazir>, <diagonalley> -- me three. Step 1: Recognize the mating net.
Step 2: See that ... Qxg1+ is the only way to break it, and also gives Black strong chances. Step 3: See and rule out cutesy alternatives, and go with the simple main line. Wednesday puzzles are sometimes harder than this. |
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| Apr-21-18 | | agb2002: White threatens mate in three with Rg7+ and Rxg8 (Qxg1+ Qxg1). This suggests 34... Qxg1+:
A) 35.Kxg1 Rxg4 36.Qxg4 Rg8 wins.
B) 35.Qxg1 Rxg4
B.1) 36.Qxg4 a2 37.Qd1 (37.Qh5 a1=Q+ 38.Kg2 Rg8+ wins) 37... Rxb4 38.Kg2 Rb1 wins (39.Qh5 Kg7 40.Qg4+ Kf8 and the king will be safe on e7). B.2) 36.Qa7 Rbg8
B.2.a) 37.Qxf7+ R8g7 wins.
B.2.b) 37.Qxa3 Rg1#.
B.2.c) 37.h3 Rg1+ 38.Qxg1 (38.Kh2 R8g2#) 38... Rxg1+ 39.Kxg1 a2 wins. B.3) 36.Qa1 Rbg8 as above. |
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| Apr-21-18 | | malt: Gone with 34...Q:g1+
35.Q:g1 R:g4 36.Q:g4 a2 37.Qg1 R:b4 38.Qa7 Rb1+ 39.Kg2 a1/Q 40.Q:f7+ =37.Qd1 R:b4 38.Kg2 Rb1 39.Qh5 Kg7
not looked at 35.K:g1 |
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| Apr-21-18 | | agb2002: It's really annoying to see the drawing maneuver in other lines but not in the critical one. |
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| Apr-21-18 | | morfishine: Good point <perfidious> This is an absolute only move <34...Qxg1> not like some others where it "looks like" the only move, this is 100% |
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| Apr-21-18 | | catlover: Agreed. I got this one. That probably means that it is not "very difficult".
:-) |
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| Apr-21-18 | | patzer2: I assume White pointed out <FSR>'s drawing line <37.Qg1! Rxb4 38.Qa7! Rb1+ 39.Kg2 a1=Q 40.Qxf7+ with a perpetual check> when he offered the draw after 37. Qg1! The alternative 37. Qd1?? loses to 37...Rxb4 -+ (-52.55 @ 31 ply, Stockfish 9 analysis of move 37...?). |
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Apr-21-18
 | | Jimfromprovidence: Everything is forced but you have to do some calculating. For example 36 Qa7 is no good because of 36...Rbg8, below, making 37 Qxf7+ unplayable, because black can interpose with either rook (or move the king). White now has to give up his queen for the two rooks, allowing the a pawn to promote. 
click for larger view |
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| Apr-21-18 | | Grandma Sturleigh: I had 34... Qxg1+ 35. Qxg1 Rxg4 36 Qxg4 Rxb4, after which 37. Qg1 Ra4 is also a draw. |
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| Apr-21-18 | | landshark: I got this one too but like a lot of you I believed Black had the win. When I saw the game agreed to a draw before Black even took the b-pawn I was a bit shocked. Then I found Qa7. Nice puzzle, kind of easy for Saturday I agree simply because 34... Qxg1 appears forced from a defensive standpoint. |
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| Apr-21-18 | | AlicesKnight: Like <al wazir> and others ..... |
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Apr-21-18
| | FSR: <perfidious> Totally agree. Christiansen's moves were completely forced. He had to play those moves or resign. A very easy problem. |
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| Apr-21-18 | | Dr Winston OBoogie: In a classical game after just 31 moves (A game averages out about 40 moves I guess) black playing 32..a4 was just a crime but missing 33.Qg2 was just as Criminal for white. Not the greatest game I've ever been through but I would <like to think> I would have won as white. |
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