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Game result (chess) M. Andreoni, 1829 N. Hallqvist, 2161 0-1 See game 147312 |
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There are 0 results for El Mat in the games.
There are at least 3 results for El_Mat in the forum.
Thibault de Vassal (2010-08-01 15:50:59)
Match vs. ICCF
Salut Xavier ! Merci pour la proposition, et en effet (mis à part le fait que j'aie du mal à trouver de bonnes raisons à l'ICCF de jouer un tel match - à part la passion de la compétition) l'un des problemes majeurs dans l'idée est que quasiment tous les meilleurs joueurs du site sont également actifs à l'ICCF... A chacun de choisir peut être, ou bien seuls les joueurs actifs sur un site seulement pourraient jouer, pas de choix simple :/
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Well, Xavier may submit the idea directly to the ICCF president, but one more obvious problem is that most of the best FICGS players are also active members at ICCF... If such a match would happen, the selected players would have to choose... Or only players active at one server only may be included in a team... no easy choice :/
Or maybe FICGS, ICCF and players wouldn't care about all this and only want a nice match that wouldn't mean anything, why not :)
Normajean Yates (2009-04-26 18:11:42)
I think Thib's IS the shortest...
To spell it out, white moves Nh2-j4-h6-j8-h10-j12, while black helps by g15-g14,Nj15-h13-g15,Ng16-j15, (and one irrelevant move e.g. moving an edge pawn). That is 5 moves ['half-moves'] by each side, and the 11th half-move is white's Nj12xh14 mate (the black K is smothered and the h14-pawn is unprotected).
You need five [half-]moves for a N to reach the opposite king; so: black can mate white (helpmate ie white co-operates) in 10 half-moves.
Elmer Valderrama (2006-10-20 21:55:18)
retrograde analysis
from math.harvard.edu
"Legal position (n.): a position that can be reached from the initial array by game consisting entirely of legal moves, however bizarre. Conventionally every chess problem should have a legal position. Naturally then, an illegal position is a position that cannot be reached by a legal game. For instance, a position in which one side has more than 8 pawns, or has both White and Black Kings in check, is illegal (why?). So is any position with a White Bishop on h1 and White pawn on g2 (why?), such as the following mutual Zugzwang (q.v.), which Lewis Stiller discovered in the course of an exhaustive computer search: White Kg6, Bh1, Pg2; Black Kg4, Pg3. The Kniest position White Kc8,Pb6; Black Ka8,Pa7 (seen above under Helpmate) is legal BTM, but not WTM since Black is in ``retro-stalemate'': Black could not have made a legal move to reach this position. [Thus this position can be set as a Helpmate in Two but not a Mate in One (or ``helpmate in 0.5'').] There are positions that can be recognized as illegal only after extensive retrograde analysis. To prove that a position is legal, one need only exhibit a single legal game reaching the position; such a game is called a proof game. Some retrograde analysis may still be needed to construct a proof game."
I bet nowadays there exist a problem solving chess engine which can give such a 'proof game' in 0.0001milisec (as the moves maybe bizarre, no need to evaluate positions, just to check them for legality)
There are 0 results for El_Mat in wikichess.
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