MESON Chess Problem Database
Problem Display
PID: 54470 (5R2/1Q6/qbr1B3/1Npb2n1/rnp1k3/4N3/1B2K3/2R5 w - - 0 1)
Sonnenfeld, Felix Alexander
1st HM., To Mat, 1960
#2
8 + 10
| 5309 | O Mosqueteiro do Rei | 1997 |
| 1101 | BCSC Final | 2006-2007 |
| 56 | The Problemist | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Sxd6#
- 2.Rxc4#
- 1...Rxe6
- 2.Rxc4#
- 1...Rc7
- 2.Sd6#
- 2.Rxc4#
- 1...Rc8
- 2.Sd6#
- 2.Rxc4#
- 1...Bxe6
- 2.Sd6#
- 1...Sa2
- 2.Bxd5#
- 1...Sc2
- 2.Bxd5#
- 1...Sd3
- 2.Bxd5#
- 1...Sf3
- 2.Qh7#
- 1...Sh3
- 2.Qh7#
- 1...Sxe6
- 2.Qh7#
- 1...Sh7
- 2.Qxh7#
- 1...Rd6
- Tries
- 1.Sc3+?
- 1...Kd4
- 2.Qg7#
- 1...Ke5!
- 1...Kd4
- 1.Rcf1?
- threat
- 2.Bf5#
- 2.R1f4#
- 2.R8f4#
- 1...Rxe6
- 2.R1f4#
- 2.R8f4#
- 1...Bxe6
- 2.Sd6#
- 2.R1f4#
- 2.R8f4#
- 1...Sxe6
- 2.Qh7#
- 1...Bc7
- 2.Bf5#
- 1...Sd3
- 2.Bxd5#
- 2.Bf5#
- 1...Sf3
- 2.Qh7#
- 1...Sh3
- 2.Bf5#
- 2.Qh7#
- 1...Sf7
- 2.Bf5#
- 1...c3!
- threat
- 1.Qc7?
- threat
- 2.Bf5#
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Rxe6
- 2.Rf4#
- 2.Qf4#
- 1...Rxc7
- 2.Sd6#
- 1...Bxe6
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Sxe6
- 2.Qe5#
- 2.Qh7#
- 1...Qc8
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Rd6
- 2.Sxd6#
- 1...Sd3
- 2.Bxd5#
- 2.Bf5#
- 1...Sf3
- 2.Bf5#
- 2.Rf4#
- 2.Qf4#
- 2.Qh7#
- 1...Sh3
- 2.Bf5#
- 2.Qe5#
- 2.Qh7#
- 1...Sf7
- 2.Bf5#
- 1...c3
- 2.Bf5#
- 2.Rf4#
- 2.Qf4#
- 1...Bxc7!
- threat
- 1.Qf7?
- threat
- 2.Qg6#
- 2.Qf4#
- 2.Qf5#
- 1...Rxe6
- 2.Qf4#
- 2.Qf5#
- 1...Bxe6
- 2.Qf4#
- 1...Sxe6
- 2.Qg6#
- 2.Qf3#
- 2.Qf5#
- 2.Qh7#
- 1...c3
- 2.Qf4#
- 2.Qf5#
- 1...Bc7
- 2.Qg6#
- 2.Qf5#
- 1...Sd3
- 2.Bxd5#
- 2.Qg6#
- 2.Qf5#
- 1...Sh3
- 2.Qg6#
- 2.Qf3#
- 2.Qf5#
- 2.Qh7#
- 1...Sxf7!
- threat
- 1.Qg7?
- threat
- 2.Sc3#
- 2.Qe5#
- 2.Qg6#
- 1...Qxb5
- 2.Qe5#
- 2.Qg6#
- 1...Rxe6
- 2.Sc3#
- 1...Bxe6
- 2.Sc3#
- 2.Qe5#
- 1...Sf7
- 2.Qg4#
- 1...Bc7
- 2.Sc3#
- 2.Qg6#
- 1...Ra3
- 2.Qe5#
- 2.Qg6#
- 1...Sa2
- 2.Bxd5#
- 2.Qe5#
- 2.Qg6#
- 1...Sd3
- 2.Sc3#
- 2.Bxd5#
- 2.Qg6#
- 1...Sf3
- 2.Sc3#
- 2.Qg4#
- 2.Qg6#
- 2.Qh7#
- 1...c3!
- threat
- 1.Qb8?
- threat
- 2.Bf5#
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Rxe6
- 2.Rf4#
- 2.Qf4#
- 1...Bxe6
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Sxe6
- 2.Qe5#
- 1...Qc8
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Rd6
- 2.Sxd6#
- 1...Rc7
- 2.Sd6#
- 1...Sd3
- 2.Bxd5#
- 2.Bf5#
- 1...Sf3
- 2.Bf5#
- 2.Rf4#
- 2.Qf4#
- 1...Sh3
- 2.Bf5#
- 2.Qe5#
- 1...Sf7
- 2.Bf5#
- 1...c3
- 2.Bf5#
- 2.Rf4#
- 2.Qf4#
- 1...Bc7!
- threat
- 1.Sc3+?
- Keys
- 1.Qe7!
- threat
- 2.Bxd5#
- 1...Rxe6
- 2.Sd6#
- 1...Bxe6
- 2.Rxc4#
- 1...Sxe6
- 2.Qh7#
- 1...Sf7
- 2.Qh4#
- threat
- 1.Qe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- R(j);P_SPINB(f),XB(F)::R(A),XP(c)
- B(f);P_SPINR(j),XB(F)::S(E)
- S(b);N_GUARD::B(F),XB(f)
- S(g);N_GUARD::QAB(G)
- S(g);N_GUARD,XB(F)::QAB(G)
- S(g);N_GUARD::QAB(G),XS(g)
- Tries
- Try
- S(E);CHECK
- Vars
- K(d);P-FLIGHT::QAB(G)
- Refutation
- K(d);P-FLIGHT
- Try
- R(A);
- Threat
- DUALS(3)
- Vars
- S(g);N_GUARD,XB(F)::QAB(G)
- B(i);::B(F)
- S(g);N_GUARD::QAB(G)
- S(g);::B(F)
- Refutation
- P(c);P_PINS(E)
- Try
- Q(G);
- Threat
- DUALS(4)
- Vars
- R(j);N_GUARD,XQ(G)::S(E)
- R(j);N_GUARD::S(E),XR(j)
- S(g);::B(F)
- Refutation
- B(i);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- B(f);XB(F)::QAR1(G)
- Refutation
- S(g);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- R(j);XB(F)::S(E)
- S(g);OGATE::QAR2(G)
- Refutation
- P(c);P_PINS(E)
- Try
- Q(G);
- Threat
- DUALS(4)
- Vars
- S(g);XB(F)::QAR1(G)
- R(j);N_GUARD::S(E),XR(j)
- R(j);N_GUARD::S(E)
- S(g);::B(F)
- Refutation
- B(i);
- Try
- Actual
- Q(G);
- Threat
- QAR(G)+B(F),DCHECK,XB(f)
- Vars
- R(j);N_GUARD,P_SPINR(j),XB(F)::S(E)
- B(f);N_GUARD,P_SPINB(f),XB(F)::R(A),XP(c)
- S(g);N_GUARD,P_SPINS(g),XB(F)::QAB(G)
- S(g);OGATE::QAR(G)
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).