MESON Chess Problem Database
Problem Display
PID: 102478 (8/8/4p3/4r3/1p6/1K1k4/3N1Q2/7B w - - 0 1)
Sonnenfeld, Felix Alexander
Europe Echecs, 1975
#2
4 + 4
| 5454 | Near Snap | 2009 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Re4
- 2.Bxe4#
- 1...Ra5
- 2.Be4#
- 1...Rb5
- 2.Be4#
- 1...Rc5
- 2.Be4#
- 1...Rd5
- 2.Be4#
- 1...Rf5
- 2.Be4#
- 1...Rg5
- 2.Be4#
- 1...Rh5
- 2.Be4#
- 1...Re4
- Tries
- 1.Sc4?
- threat
- 2.Sb2#
- 2.Sxe5#
- 2.Qd2#
- 1...Re3
- 2.Qxe3#
- 2.Qd2#
- 1...Re1
- 2.Sb2#
- 2.Qd2#
- 1...Re4
- 2.Sb2#
- 2.Qd2#
- 1...Ra5
- 2.Sb2#
- 2.Qe3#
- 2.Qd2#
- 1...Rb5
- 2.Sb2#
- 2.Qe3#
- 2.Qd2#
- 1...Rc5
- 2.Sb2#
- 2.Qe3#
- 2.Qd2#
- 1...Rd5
- 2.Sb2#
- 2.Qe3#
- 2.Qd2#
- 1...Rf5
- 2.Sb2#
- 2.Qe3#
- 2.Qd2#
- 1...Rg5
- 2.Sb2#
- 2.Qe3#
- 2.Qd2#
- 1...Rh5
- 2.Sb2#
- 2.Qe3#
- 2.Qd2#
- 1...Re2!
- threat
- 1.Sc4?
- Keys
- 1.Sf3!
- threat
- 2.Sxe5#
- 1...Ke4
- 2.Se1#
- 1...Re2
- 2.Qd4#
- 1...Re1
- 2.Sxe1#
- 1...Re3
- 2.Qc2#
- 1...Re4
- 2.Qd2#
- 1...Ra5
- 2.Se1#
- 1...Rb5
- 2.Se1#
- 1...Rc5
- 2.Se1#
- 1...Rd5
- 2.Se1#
- 1...Rf5
- 2.Se1#
- 1...Rg5
- 2.Se1#
- 1...Rh5
- 2.Se1#
- threat
- 1.Sf3!
Anticipated by 4695(1887), 120949(1901), 52598(1960), 238658(1970)
This anticipates 187410(2014)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 8
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::B(A),XR(c)
- R(c);N_GUARD::B(A)
- Tries
- Try
- S(B);
- Threat
- DUALS(3)
- Refutation
- R(c);
- Try
- Actual
- S(B);
- Threat
- S(B),XR(c)
- Vars
- K(a);S_FLIGHT::B(A)+S(B)
- R(c);SBLOCK::QAR1(C)
- R(c);N_GUARD::S(B),XR(c)
- R(c);SBLOCK::QAB1(C)
- R(c);N_GUARD::S(B)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).