MESON Chess Problem Database
Problem Display
PID: 260394 (rN1B4/p7/1bR5/k7/3N4/K2n4/8/8 w - - 0 1)
Somma, Francesco
L'Italia Scacchistica, 1929
#2
5 + 5
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Bc7
- 2.Bxc7#
- 2.Ra6#
- 1...Bxd8
- 2.Ra6#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Se5
- 2.Rc5#
- 1...a6
- 2.Bxb6#
- 1...Bc7
- Tries
- 1.Bc7?
- 1...Bxc7
- 2.Ra6#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Se5
- 2.Rc5#
- 1...a6
- 2.Bxb6#
- 1...Rxb8!
- 1...Bxc7
- 1.Rc4?
- threat
- 2.Ra4#
- 1...Bc7
- 2.Bxc7#
- 1...Sb2
- 2.Rc5#
- 1...Sb4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Bxd8!
- threat
- 1.Rxb6?
- threat
- 2.Sb3#
- 2.Sdc6#
- 2.Sbc6#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Ra6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rb7#
- 1...Rxb8
- 2.Sb3#
- 2.Sc6#
- 1...Sc1
- 2.Sdc6#
- 2.Sbc6#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Ra6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rb7#
- 1...Sb2
- 2.Sb3#
- 2.Sdc6#
- 2.Sbc6#
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Ra6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rb7#
- 1...Sb4
- 2.Sb3#
- 2.Rxb4#
- 2.Rb5#
- 2.Ra6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rb7#
- 1...Sc5
- 2.Sdc6#
- 2.Sbc6#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Ra6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rb7#
- 1...Se5
- 2.Sb3#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Ra6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rb7#
- 1...a6
- 2.Sb3#
- 2.Sdc6#
- 2.Sbc6#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rxa6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rb7#
- 1...axb6!
- threat
- 1.Bc7?
- Keys
- 1.Rc7!
- 1...Bc5+
- 2.Rxc5#
- 1...Rxb8
- 2.Rxa7#
- 1...Bxd4
- 2.Rc5#
- 1...Bxc7
- 2.Bxc7#
- 1...Sb4
- 2.Rc5#
- 1...Sc1
- 2.Rc5#
- 1...Se1
- 2.Rc5#
- 1...Sb2
- 2.Rc5#
- 1...Sf2
- 2.Rc5#
- 1...Sf4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...Se5
- 2.Rc5#
- 1...a6
- 2.Sbc6#
- 1...Bc5+
- 1.Rc7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- B(c);N_SPINB(c),OGATE,XB(E)::R1(C)
- S(a);N_GUARD::R(C)
- S(a);N_GUARD::R(C),XS(a)
- P(d);N_GUARD::B(E),XB(c)
- Tries
- Try
- B(E);
- Vars
- B(c);N_SPINB(c),OGATE,XB(E)::R1(C)
- S(a);N_GUARD::R(C)
- S(a);N_GUARD::R(C),XS(a)
- P(d);N_GUARD::B(E),XB(c)
- Refutation
- R(e);XS(D)
- Try
- R(C);
- Threat
- R1(C)
- Vars
- B(c);OGATEB::B(E),XB(c)
- S(a);N_GUARD::R(C)
- S(a);N_GUARD::R(C),XS(a)
- Refutation
- B(c);N_SPINB(c),XB(E)
- Try
- R(C);XB(c)
- Threat
- DUALS(16)
- Refutation
- P(d);P_SPINP(d),XR(C)
- Try
- Actual
- R(C);N_PINB(c)
- Vars
- B(c);CHECK::B(E)+R(C),DCHECK,XB(c)
- R(e);N_GUARD,XS(D)::R(C),XP(d)
- B(c);XS(B)::B(E)+R(C),DCHECK
- B(c);OGATE,P_SPINB(c),XR(C)::B(E),XB(c)
- S(a);N_GUARD::R(C)
- S(a);N_GUARD::R(C),XS(a)
- P(d);SBLOCK::S(D)
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).