MESON Chess Problem Database
Problem Display
PID: 52598 (8/8/4p3/4r3/7p/5k1K/3Q1N2/1B6 w - - 0 1)
Sonnenfeld, Felix Alexander
O Globo, 1960
#2
4 + 4
| 5309 | O Mosqueteiro do Rei | 1997 |
| 5454 | Near Snap | 2007 |
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.Sg4?
- threat
- 2.Sh2#
- 2.Sxe5#
- 2.Qf2#
- 1...Re3
- 2.Qxe3#
- 2.Qf2#
- 1...Re1
- 2.Sh2#
- 2.Qf2#
- 1...Re4
- 2.Sh2#
- 2.Qf2#
- 1...Ra5
- 2.Sh2#
- 2.Qe3#
- 2.Qf2#
- 1...Rb5
- 2.Sh2#
- 2.Qe3#
- 2.Qf2#
- 1...Rc5
- 2.Sh2#
- 2.Qe3#
- 2.Qf2#
- 1...Rd5
- 2.Sh2#
- 2.Qe3#
- 2.Qf2#
- 1...Rf5
- 2.Sh2#
- 2.Qe3#
- 2.Qf2#
- 1...Rg5
- 2.Sh2#
- 2.Qe3#
- 2.Qf2#
- 1...Rh5
- 2.Sh2#
- 2.Qe3#
- 2.Qf2#
- 1...Re2!
- threat
- 1.Sg4?
- Keys
- 1.Sd3!
- threat
- 2.Sxe5#
- 1...Ke4
- 2.Se1#
- 1...Re2
- 2.Qf4#
- 1...Re1
- 2.Sxe1#
- 1...Re3
- 2.Qg2#
- 1...Re4
- 2.Qf2#
- 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.Sd3!
Anticipated by 4695(1887), 120949(1901)
This anticipates 238658(1970), 102478(1975), 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(C);
- Threat
- DUALS(3)
- Refutation
- R(c);
- Try
- Actual
- S(C);
- Threat
- S(C),XR(c)
- Vars
- K(a);S_FLIGHT::B(A)+S(C)
- R(c);SBLOCK::QAR1(B)
- R(c);N_GUARD::S(C),XR(c)
- R(c);SBLOCK::QAB1(B)
- R(c);N_GUARD::S(C)
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).