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Qxb2
1….Qb2, 2. Kb2, Rf2,
1..QxB2 2. Kxb2 Rf2+ 3. Kc1 Ra1++
Alot easier than the exercise on http://susanpolgar.blogspot.com/2010/06/serious-calculation-needed.html!
1.Qxb2 Kxb2
2.Rf2+ (double check)
The king has to retreat back to the first rank, but the diagonal are now open!
The possibilities are:
2…Kb1
3.Ra1# (3.Rb2+ Kc1, 4.Ra1+ Bb1, 5.Rab1#)
2…Kc1
3.Ra1+ (3.Bb2+ Kb1, 4.Ra1#) Bb1 4.Bb2# (4.Nb3#)
What could it be but Qxb2+
……Qxb2+
Kxb2 Rf2 double check
Kb1 Ra1 mate
..Qxb2+
Kxb2 Rf2 Double Check
If Kb1 or Kc1
Ra1 Mate
Qxb2 Kxb2 Rf2+ and mate in the corner with R or N
Still working on the previous one. This was a nice easy interlude 🙂
1… Qxb2! 2. Kxb2 Rf2+ 3. Kb1 Rb2+ 4. Kc1 Nb3 #
If 3. Kc1, 3… Nb3+ 4. Kb1 Rb2#.
1… Qxb2, luring the white king into the check 2…Rf2 is curtains for white.
1. … Qxb2+!!
2. Kxb2 Rf2+ (double check)
3. Kb1 (c1), Ra1#
A little hard to see because there are so many “empty” squares around the white K so it looks quite “free”, but actually it isn’t.
1. qxb2+, kxb2 2.rf2+ (double check so neither rook on f2 nor bishop on g7 can be taken. Now if 3. K b1 is followed by 3…, ra1 mate but if 3.kc1, ra1+ 4. bb1, nb3++ mate.
1. …, Qxb2+
2. Kxb2, Rf2+
3. Kb1 or Kc1, Ra1++
(0-1)
1.Qxg2 Kxg2
2.Rc2dbl ck
2…Kg1 (or Kf1}
3.Rh1#
Well, white is threatening mate with Bg7 and Qh8, so a counter mating attack seems to be called for. I see the possibility of a discovered attack if the f6 rook were somewhere else and the white king were on b2. My first thought is to force the issue with an immediate Qb2:
1. …..Qb2
2. Kb2 and now, where to move the f6 rook. With Bg7 still a threat, a double check is black’s only option, and this leaves only one move. Continuing:
2. …..Rf2 (double check)
3. Kb1 Ra1#
At move three white could have moved to c1, but that is still mate:
3. Kc1 Ra1
4. Bb1 Nb3#
Qxb2… Rf2+… Ra1++
1. …, Qxb2+!!s
2. Kxb2, Rf2+ (double check)
3. Kc1, Ra1+
4. Bb1, Rb2#
Correction to my previous post. If 3. Kb1 Ra1#
A lesson in pins!
Qa2+
OK, one more try.
1. … Qxb2+!!
2. Kxb2 Rf2+
3. Kc1 Ra1+
4. Bb1 Nb3#
1…Qxb2+ 2.Kxb2 Rf2++ 3.Kb1 or c1 Ra1 mate !
Qxp, then a double-check by exposing the bishop with the rook, then rook down for mate.
In my earlier comment, I missed 3…Ra1. Others showed me that. Thanks!
White is ahead by a whole pawn plus the bishop pair, which means the evaluation is about +1.50. Therefore Black should resign.
Queen sac on b2 followed by double check with bishop on g7 and rook on f2 leads to mate in four.
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Hi Susan Polgar,
As usual brainy minds of this blog,had filled the best possibilities,nothing to add.
By
Venky[Chennai – India]
1.. Qxb2
2. Kb2 – Rf2
3. Kc1 – Nb3
4. Kb1 – Ka1
#