Website founded by Milan Velimirović in 2006 13:04 UTC ISC 2024      Headlines    Forum*    Fellows    Members    DL Archive    Links Username: Password: Remember me   Forgot your password? Click here! SIGN IN to create your account if you don't already have one. CHESS SOLVING Tournaments Rating lists 1-Apr-2024 B P C F		MatPlus.Net Forum General White Line Combinations in Selfmate   You can only view this page! Page: [Previous] [Next] 1 2 (21) Posted by Frank Richter [Friday, Sep 22, 2023 14:32] I think, this mechanism is not new. Following position is quite ugly too, but saves one third of pieces: (= 8+10 ) s#2 1.Rb5! f5 2.d4+ Ke4# 1.- c:b5 2.Qd5+ K:d5# Without Pe6 we would have also 1.- e6 2.Qd4+, but there are cooks.   (Read Only) pid=25304 (22) Posted by Hauke Reddmann [Friday, Sep 22, 2023 15:11] @Frank: My beef here would be that Rb4 stands behind the Q, so "three lines" is debatable. What about (= 11+10 ) with sort of a "Sonderform"? (White first opens the line which is subsequently closed). Also, I immediately see the possibility that Se3 could threat something like Sxg4 Rxg4#. EDIT: Like this? (= 11+10 )   (Read Only) pid=25305 (23) Posted by Viktoras Paliulionis [Saturday, Sep 23, 2023 01:14] WR is unused.   (Read Only) pid=25308 (24) Posted by Hauke Reddmann [Saturday, Sep 23, 2023 20:28] True, but not exactly an unknown blemish considering the same theme in the #2. :-) (= 10+11 ) At least a bit more play and tries with the unused rook. @Frank: digging up a concrete anticipation would be of help if I even write an article :-)   (Read Only) pid=25310 (25) Posted by Viktoras Paliulionis [Sunday, Sep 24, 2023 13:11] P1202658 Vladimir N. Zabunov 4193 Schach , p. 60, 02/1963 (= 8+14 ) s#2 1.Bh5! [2.Bxf3+ Bxf3#] 1... g4 2.c4+ Ke4# 1... c4 2.e4+ Kc5# Move Be8->g6, then 1.Bg6-h5 will unguard e4.   (Read Only) pid=25311 (26) Posted by Viktoras Paliulionis [Sunday, Sep 24, 2023 14:18] Another example: P1250119 Laszlo Talaber 340 Problem 05/1953 1st Prize (= 11+13 ) s#2 1.Qc3! ~ 2.Rf4+ Kxf4# 1...Sb1/Sb3 2.Se3+ Qxe3# 1...Sf3 2.e4+ Kf4# 1...Se4 2.dxe4+ Kf4# 1...Sc4 2.Qxf6+ Kxf6# The g4 square (more precisely, the mating line) is attacked by two white linear pieces bR and wB (indirectly after e4+). It is possible to get a third guard of g4 by changing the position a little: (= 11+13 ) or (= 11+13 ) 1.Qh8? f6! 1.Qc3!   (Read Only) pid=25312 (27) Posted by Hauke Reddmann [Sunday, Sep 24, 2023 18:36] @Viktoras: THX for the interesting examples. Note, though, that in the latter ones Sf3 doesn't (preemptively) cut a line to a flight but a line to an interference.   (Read Only) pid=25313 No more posts Page: [Previous] [Next] 1 2 MatPlus.Net Forum General White Line Combinations in Selfmate