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MatPlus.Net Forum General #2 with stalemate tries

### #2 with stalemate tries

First of all, *active* tries. A record with Black already stalemated
in the initial position is easily done. (Albrecht 285442 - I dood it
myself on MPF :-) Maybe not the record.) The Albrecht lists about
200 problems with stalemate avoidance, so it's a bit tedious to
just one more problem, the 141891 by Petrovic (46 tries, 5 run into
stalemate. With batteries on a flight, I could dwarf 5 in 5 minutes :-)

So, does someone offhandedly know the record for stalemateING tries?

Built in 10 seconds, has still vast optimization potential:

(= 14+2 )

29 active stalemate tries

Now a really interesting thing would be White-to-play
with stalemate tries.

(= 11+1 )

20 active stalemate tries, 1...Kxg7 2.Tb8#, 1.Da6!
(EDIT: Sh6 instead of Ph7, otherwise retrostalemate, see Siegfrieds comment)

I leave to MPF to find a position where ALL moves are either
stalemate or the one solution :-)

Hauke, in your second position, Black is to move, so 1.-Kxg7 2.Rb8ä is the solution, 1.Qa6 is the try and the stalemates are tries of the try.

Foiled again :-) Edited.

(= 11+1 )

Question above also solved: White has only (23) stalemate moves,
except the key (which is waiting - a changed mate would be
better, of course).

"...tries of the try..."

Tries, son of Try. The first of his name. King of the Alfils, and the Wazir, and the First Men. Rightful Royal Unit of the Sixty Four Kingdoms.
Nearly stalemated in battle.
Valar morghulis.

A try ;) to Hauke's first position:

(= 13+2 )

38 tries, 36 with at least one threat, what I'd prefer.
1.Rb3!

@Frank: Bf4~ doesn't threat anything?!
(Rg4->h4,+wPf7 loses 3 tries, but then Bf4~ comes with a threat)

You are right, Hauke.
So do we need a threat in every counted "active" try or not?

2Siegfrid:
last black move Kh7-h8, previos white Ba2-g8+

@Valery: see comment below diagram, Hauke initially had Ph7 instead of Sh6, and then there's no last black move.

@Frank: That's entirely your preference :-)
(Pump up records now, classify later.)

(= 11+2 )

@Hauke: Last black move?

Here we go again. Will I ever learn? :-)
Edit: wK to a1, +wPh3.

Polished?

(= 13+3 )

39 attempts to guard g5 (if we count g8Q and g8R as two tries), but not all tries with a threat.
1.Rg2!
Possibly there are smarter ways to give Black a last move?

Edit: Slightly other version, all 38 tries with threat(s), but a trivial solution:

(= 14+2 )

(15) Posted by Olaf Jenkner [Thursday, Oct 27, 2022 18:00]

Blank