# No.1469 (EH)

 No.1469  Eric Huber (Romania) Original Fairy problems JF-2019/II: July – December’2019

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 No.1469 Eric Huber Romania original – 29.12.2019 Solutions: (click to show/hide) white Kb5 black Kc3 neutral Pc7f7g7 h#2.5         2 solutions        (1+1+3) PartialParalysis Leffie Neutral pawns c7,f7,g7 1...c7-c8=nQ 2.nQc8-a6 g7-g8=nR 3.nRg8-f8 nQa6-a5# 1...c7-c8=nR+ 2.nRc8-b8+ nRb8-b6 3.Kc3-b4 f7-f8=nB# { (C+ by WinChloe)} Explanations about the mates: (I) Black cannot move the nQ away from the bK due to: - Leffie illegal moves: 4.nQa8?? illegal because of nRf8, 4.nQa7/nQa2 illegal because of nPf7 - Partial Paralysis: 4.nQa6/nQa4/nQb6?? are impossible because nQ partially paralysed by wK (II) Black cannot move the nB away due to: - Partial Paralysis: 4.nBxg7? impossible because nBf8 partially paralysed by nPg7 - Leffie illegal moves: 4.nBc5?? would be fine from the point of view of Partial Paralysis - nB partially paralysed by bK – but it is illegal according to Leffie due to the presence of nRb6. Of course 4.nRd6?? is also illegal due to Leffie Comments: Promotions, specific mates, “mysterious” moves by promoted nR (3.nRf8 and 2…nRb6) In (I) c7 gives mate, g8 promotes with Leffie motives, f7 blocks In (II) c7 promotes with Leffie motives, f7 gives mate, g7 blocks. (Author)

### 7 Responses to No.1469 (EH)

1. seetharaman says:

The combined conditions are a little to grasp. In the second solution, I cannot understand why black cannot play 4.nBxg7 defeating the mate.

2. seetharaman says:

* difficult to grasp.

3. Eric says:

As written in the explanations, in the second solution 4.nBxg7? is impossible because nBf8 is partially paralysed by nPg7.

4. Seetharaman says:

sorry. you are right if course!

5. Joost says:

In the mating position of (a) it’s important to notice that nQb4 is impossible due to nRf8 (explaining why this rook must go to f8).

• Joost says:

Hm, nonsense of course. nQb4 is impossible because of Partial paralysis.

• Eric says:

That’s right, Partial Paralysis effectively restricts the nQ’s mobility.

If you enjoy this combination of fairy conditions and the headache that ensues, you can also have a look at G206, SuperProblem 2019. It shows mates in the middle of the board with a neutral Queen and again only 5 units.
http://superproblem.ru/htm/tourneys/annual-it/2019/fairies_2019.html