White to move. How should white proceed? No computer lines please.
r1q1r2k/1p3p1p/2bR3R/4p3/1n2n3/1B4Q1/1PP3PP/6BK w – – 0 1
Chess Daily News from Susan Polgar
Accurate calculation required
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I smell a rook sac. It looks like a corridor mate of some kind but I am too tired right now.
🙂
1. Rxh7 Kxh7 2. Qh4+ Kg8 3. Rg6+ Kf8 4. Bc5+ Nxc5 5. Qh8+ Ke7 6. Qf6+ Kd7 7. Qd6+ mate.
If 3. … Kg7 4. Qh6+ Kg8 5. Rg6+ mate
Erm. let me guess.. (in fact, I am really guessing).
1. Rxh7+ (since everything is hanging) Kxh7
2. Qh4+ Kg8 (if black plays Kg7, Qh6 and Rg6 will do the job)..
3. Rg6+ Kf8
4. Bc5+ (this move is actually discovered after I realize the knight on e4 is irritating a few moves later) Nxc5 (if Re7, Qh8#)
5. Qh8+ Ke7
6. Qf6+ (that’s the purpose of removing the knight from e4 earlier) Kd7
7. Qd6 #
OR 6 .. Kf8
7. Qxf7 mate
Hopefully I am correct.
1.Rxh7+, Kxh7 2.Qh4+, Kg8 (2…Kg7 3.Qh6+ and 4.Rg6#) 3.Rg6+, Kf8 4.Qh8+, Ke7 5.Qxe5+, Kd7 (5…Kf8 6.Qg7+, Ke7 7.Qxf7+, Kd8 8.Bb7+, Qc7 9.Qxc7# and 5…Kd8 6.Bb6+, Kd7 7.Qf5+ -+) 6.Qf5+, Kc7 7.Qf4+, Kd7 8.Qxf7+, Re7 9.Be6+, Kc7 10.Qxe7+, Bd7 11.Bxd7, Qxd7 12.Bb6+, Kc8 13.Rg8+, Qd8 14.Qc7#
1. Rxh7+ Kxh7 2.Qh4+ Kg8 3. Rh6 (threatening mate in 2) wins the Queen after the forced …Re6 (to cover h6)but also the exchange (after Rh8+,RxQ, Bxe6) AND a piece (the Knight in b4 after Qe7+
Hi Susan Polgar,
White wins the game,variation exist.
Example one
============
1.Rh7+ K*Rh7
2.Qh4+ Kg8
3.Rg6+ Kf8
4.B*f7 Ra8
5.Bb3 Nf2+
6.Q*Nf2+ Ke7
7.Qf6+ Kd7
8.Qd6++ Mate
Example two
===========
1.Rh7+ K*Rh7
2.Qh4+ Kg8
3.Rg6+ Kf8
4.B*f7 Nf2+
5.Q*Nf2 B*g2+
6.K*Bg2 Qc6+
7.Bd5+ Ke7
8.B*Qc6 b*Bc6
9.Qf6+ Kd7
10.Rg7+ Kc8
11.Qd6 Na6
12.Q*c6+ Kb8
13.Qb7++ Mate.
White wins the game.
By
Venky[ India – Chennai ]
1Rxp+ Kxr 2Qh4+kg8 3Rg6+kf8 4Bc5+ nxb
5qh8+ke7 6Qe5+Kf8 7qh8+ ke7 8 Qf6+ kf8
9Qf7 mate
1. Rh7+ Kh7
2. Qh4+ Kg8
3. Rh6
1Rh7ch kh7 2Qh4ch kg8 3Rg6ch kf8
4Bc5ch nc5 5 Qh8ch ke7 6 Qf6ch
Mate next move
1. Rxh7+ – Kxh7
2. Qh4+ – Kg8 (Kg7, Qh6+ and Rg6++)
3. Rg6+ – Kf8
4. Bc5+! – Nxc5 (Re7, Qh8++)
5. Qh8+ – Ke7
6. Qf6+ – Kd7 (Kf8, Qxf8++)
7. Qd6++
1) Rxh7+, Kxh7;
2) Qh4+, Kg8;
3) Rg6+, Kf8;
4) Bc5+, Nxc5;
5) Qh8+, Ke7;
6) Qf6+, Kd7;
7) Qd6#
If 6) …, Kf8;
7) Qxf7#
Binding of f-pawn looks like a pretty obvious theme here, leading to the logical approach:
1. Rxh7+ Kxh7
2. Qh4+ Kg8 (Kg7 Qh6+ Kg8 Rg6#)
3. Rg6+! Kf8
And here, a bishop sack looks good, to prepare a queen check on f6 (and even d6):
4. Bc5+ Nxc5 (Re7 Qh8#)
(The alternative Nd6 should probably fall out the same as below, though it would protect f7 in some lines)
5. Qh8+ Ke7
6. Qf6+!
And black has some unpleasant alternatives:
a) 7. … Kd7
8. Qd6#,
b) 7. … Kf8
8. Qd6+ Ke8
9. Rg8#
Main line seems to be:
7. … Ke8
8. Rg8+ Kd7
at least winning a queen. Unfortunately, winning a queen isn’t sufficient here, so there has to be something better, but this is about as far ahead as I am able to see…
too easy
Hope I didn’t miss a shorter mate
1.Rxh7+ Kxh7 (only move)
2.Qh4+ Kg8 (if 2…Kg7 3.Qh6+ Kg8 4.Rg6#)
3.Rg6+ Kf8 (only move)
4.Qh8+ Ke7
5.Qxe5+ Kd7
6.Qf5+ Kc7 (if 6…Kd8 7.Bb6+ Ke7 8.Qxf7#)
7.Qf4+ Kd7 (if 7…Kd8
8.Bb6+ Kd7 (or Ke7 9.Qxf7#))
8.Qxf7+ Re7
9.Be6+ Kd6
10.Bxc8 Re6
11.Qxe6#
1.Rxh7+! Kxh7 2.Qxh4+…
a)2…Kg7 3.Qh6+ Kg8 4.Rg6#
b)2…Kg8 3.Rg6+ Kf8 4.Bc5+! Nxc5 5.Qh8+ Ke7 6.Qf6+ …(6…Kf8 7.Qxf7#) 6…Kd7 Qd6#
1. Rxh7, Kxh7 2. Qh4+, Kg7 (Kg8 4. Rg6+, Kf8 5.Bc5+, Re7 6.Qg8++) 3. Qh6+, Kg8 4. Rg6+, Kf8 5.Bc5+, Re7 6.Qg8++
1 Rh7! Kh7 2 Qh4 Kg8 (Kg7 3 Qh6 Kg8 4 Rg6#) 3 Rg6! Kf8 4 Bc5! Nc5 (Re7 5 Qh8#) 5 Qh8 Ke7 6 Qf6 Kd7 (Kf8 7 Qf7#) 7 Qd6#
It actually does require accurate calculation as several other lines I checked do not work for White.
-Justin Daniel
1.Rxh7+ Kxh7
2.Qh4+ Kg8
3.Bxf7+ Kxf7
4.Qh7+ Kf8
5.Rg6
***Note: Black resigned because white will be checkmate in Qg7# or Rg8#
– High skill from MR KO (Malaysian) –
Off the top of my head
Rxh7+ Kh7
Qh4+ Kg8 if Kg7 Qh6+ mates quickly
Rg6+ Kf8
Bc5+ Nxc5 interpositions don’t help
Qh8+ Ke7
Qf6+ Kd7
Qd6 mate
Well, calculation or not, Rh7 would be the very first move I would look at since the first three moves for each side are pretty obvious (though not necessarily correct for white-they are just the natural-looking moves to me). The key features of this beginning are the denuding of the black king, control of the 6th rank by the white rook, and the bishop attack on f7 (see the pin below when the king is on g8):
1. Rh7 Kh7
2. Qh4 Kg8 (Kg7 3.Qh6 Kg8 4.Rg6#)
3. Rg6 Kf8
Now, that is the easy part, I think. Now, the first thing that catches my eye at this stage is the maneuver Qh8/Qe5. Now, with a quick calculation, I was excited- most of the lines looked like mates. Let’s play through it to see what I mean:
4. Qh8?! Ke7
5. Qe5! Kd7!
Here, I think every other move loses quickly for black: [5. …Kd8? 6.Bb6! Kd7 (or 6. …Qc7 7.Qc7#) 7.Qf5! Re6 (or 7. …Ke7 8.Qf7#) 8.Qf7 Re7 (or 8. …Kd6 9.Re6 Qe6 10.Qe6#) 9.Be6 Kd6 10.Qf4#]; or [5. …Kf8? 6.Qg7 Ke7 7.Qf7 Kd8 8.Bb6 Qc7 9.Qc7#]; or [5. …Qe6? 6.Re6 Kd7 (mate otherwise) 7.Qd4 there may be a mate here, but I can’t find it right now, but white has a decisive material edge]. Continuing:
6. Qf5
With the knights at b4 and e4, I can’t play the moves I would really like to play here, like Rd6 or Qd4. I am pretty sure this move is all white has now, but I don’t think it will win, though I don’t see a loss either:
6. …..Kd8!
This is the move I couldn’t see at the beginning. As a player, my limit of calculation is in the range of 3-5 moves deep without a chess board, depending on the position. Indeed, I thought Kd8 had to be losing. Every other move for black does seem losing: [6. …Kc7 7.Qf4! Kd7 8.Qf7 loses like a note above shows]; and moves like Ke7 and Re6 lose just like before to Qf7+. Continuing:
7. Bb6
Nothing else holds for white. Given a single move, black will consolidate his material edge with a move like Qc7 or Qd7. Continuing:
7. …..Qc7! (the only move)
8. Bc7
This is the only move now for white. Continuing:
8. …..Kc7
9. Qf7 Kb6
Here, Kb8 may be just as good, but I want to keep the rooks connected. Continuing:
10. h4
Black was threatening a back rank mate, and white needs to advance a pawn anyway. I will end this line here. Materially, black has 2 knights and a rook a queen and three pawns. I have no clue who stands better here. From a simple material standpoint, white should have the edge, but is it decisive?
In any case, the real thorn in variation was the knight at e4 which covered squares like f6, g5, and d6- most particularly, d6. However, there was a way to deflect this knight at move 4 above, and it turns out to mate black:
4. Bc5! Nc5 (Nd6 5.Bd6; Re7 5.Qe7#)
5. Qh8
And, now, the maneuver Qh8+ is deadly:
5. …..Ke7
6. Qf6!
Of course, now, Qe5 is met by Ne6 and white’s attack comes naught. Continuing:
6. …..Kd7 (Kf8 7.Qf7#)
7. Qd6#
There is one little subtlety in this one, deflecting the Black knight from protecting f6 square.
1. Rxh7+ Kxh7
2. Qh4+ Kg8 or [2. … Kg7 3. Qh6+ Kg8 4. Rg6#]
3. Rg6+ Kf8
4. Bc5+ Nxc5 or [4. … Re7 5. Qxe7#]
5. Qh8+ Ke7
6. Qf6+ Kd7
7. Qd6#