Discussion of anything and everything relating to chess playing software and machines.
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Nordlandia
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by Nordlandia »
This thread will be dedicated to all known fortresses
2B5/2q1p3/6p1/6k1/4p3/4B1P1/4P1KP/8 b - - 0 5
4K3/2k1Bp1N/6p1/5PP1/8/7p/b7/8 w - - 0 0
4KBbn/5p2/6p1/3k1P2/3N2P1/7p/8/8 w - - 0 0
4knQ1/7r/3p2p1/2bP1pP1/5P1N/6K1/8/8 b - - 0 1
7k/3K1p2/5NpB/6P1/8/8/8/7q b - - 0 4
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Nordlandia
- Posts: 2822
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
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by Nordlandia »
Semi-Fortress
6n1/8/5k2/4p1bR/4B1P1/6K1/8/8 b - - 0 5
Code: Select all
[Event "tv03#0525 {c} {m}"]
[Site "?"]
[Date "1995.??.??"]
[Round "?"]
[White "Aloni H"]
[Black "White wins"]
[Result "*"]
[SetUp "1"]
[FEN "Nrk5/1N6/n2n4/8/2B5/3KB3/1R5b/r2bQ3 b - - 0 1"]
[PlyCount "20"]
[EventDate "1995.??.??"]
1... Ra3+ $1 2. Kd4 $1 Be5+ $1 3. Kxe5 Rxe3+ $1 4. Kxd6 $1 Rxe1 5. Nb6+ $1 Kxb7
6. Nc8+ $1 Kxc8 7. Bxa6+ Rb7 {Nowotny} 8. Rxb7 $1 (8. Bxb7+ $2 Kb8 $1 (8... Kd8
$2 9. Bc6) 9. Bc6+ Ka7 10. Kc7 Re7+ 11. Bd7 Ba4) 8... Bf3 $1 9. Rb2+ (9. Rb1+
$2 Bb7 $1 10. Bxb7+ Kd8 $1 11. Rxe1) (9. Rb5+ $2 Bb7 10. Bxb7+ Kb8 11. Bc6+ Ka7
12. Kc7 Ka6) 9... Bb7 10. Bxb7+ Kd8 11. Bd5 $1 (11. Rg2 $2 Re2 $1 12. Rg8+ Re8
13. Rg7 Re7 $1 14. Rxe7) *
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Nordlandia
- Posts: 2822
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Post
by Nordlandia »
5B1k/3p3b/3PpNq1/4Pp2/5P2/6PK/8/8 b - - 0 6
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Nordlandia
- Posts: 2822
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
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by Nordlandia »
r7/kpPp4/N2P4/1P1p4/2p5/8/4b3/2K5
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Vinvin
- Posts: 5287
- Joined: Thu Mar 09, 2006 9:40 am
- Full name: Vincent Lejeune
Post
by Vinvin »
Nordlandia wrote:[d]r7/kpPp4/N2P4/1P1p4/2p5/8/4b3/2K5
I suppose it's white to play :
r7/kpPp4/N2P4/1P1p4/2p5/8/4b3/2K5 w - - 0 1
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hgm
- Posts: 28353
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- Location: Amsterdam
- Full name: H G Muller
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by hgm »
8/8/8/3QK3/3n4/8/1b6/k7 w
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Vinvin
- Posts: 5287
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- Full name: Vincent Lejeune
Post
by Vinvin »
Some from my past test sets :
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Vinvin
- Posts: 5287
- Joined: Thu Mar 09, 2006 9:40 am
- Full name: Vincent Lejeune
Post
by Vinvin »
more :
8/8/8/5Bp1/7k/8/4pPKP/8 w - - 0 1
1.Bg4!
1k6/3p4/1B6/4Pp1p/1p5R/1p4p1/pP3n2/K6n w - - 0 1
After 1.Rxh1 Nxh1 2.e6 dxe6 3.Bc7+ Kb7 4.Bxg3 e5
White bishop stays on e1-h4 diagonal so Knight cannot move and it is draw.
I'm not sure about this one :
3k4/2Rnn3/1p2pbp1/pP1p1pBp/P2P1P1P/4KPP1/4B3/8 w - - 0 2
2. Rxd7+ $4 {This move win a piece but black is in a fortress now : draw !} *
8/1p2b3/6k1/5p2/p2NbP1p/P1B1P1p1/1P5P/6K1 w - - bm h3;
h3! "fortress From Smirin-HIARCS"
5N2/6N1/q2k3p/8/6p1/4K1PP/B5P1/8 w - -
bm Nf5+!
8/2B2k2/6p1/5P1p/6p1/p1p3PP/6P1/1n2K2R w K - 0 1
bm 1. fxg6+!
q7/8/2p5/B2p2pp/5pp1/2N3k1/6P1/7K w - - 0 1
1. Ne4+ Kh4 2. Ng3 fxg3 3. Bb6 Qa1+ 4. Bg1 *
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Nordlandia
- Posts: 2822
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- Location: Sortland, Norway
Post
by Nordlandia »
Hint: Bishop Promotion
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Nordlandia
- Posts: 2822
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Post
by Nordlandia »
Fixed solution of the last position.