MESON Chess Problem Database
Problem Display
PID: 168437 (1q6/2P2R2/n1pPk3/3N1R2/5P2/B5rN/1p2b3/1K1BQ1n1 w - - 0 1)
Petite, Efren
Problemas, 1990
#2
11 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qb3
- 2.c8Q#
- 2.c8B#
- 1...Qb5
- 2.c8Q#
- 2.c8B#
- 1...Qb6
- 2.c8Q#
- 2.c8B#
- 1...Qd8
- 2.cxd8S#
- 1...Rb3
- 2.Sg5#
- 1...Rc3
- 2.Sg5#
- 1...Rd3
- 2.Sg5#
- 1...Re3
- 2.Sg5#
- 1...Rf3
- 2.Sg5#
- 1...Rg5
- 2.Sxg5#
- 1...cxd5
- 2.R5f6#
- 1...Qb3
- Tries
- 1.Sc3?
- threat
- 2.R5f6#
- 1...Rxc3
- 2.Sg5#
- 1...Qd8
- 2.Bb3#
- 2.cxd8S#
- 1...Qh8
- 2.Bb3#
- 1...Rg6!
- threat
- 1.Se3?
- threat
- 2.R5f6#
- 2.Re7#
- 1...Qxc7
- 2.R5f6#
- 1...Rxe3
- 2.Sg5#
- 1...Qb4
- 2.R5f6#
- 1...Sb4
- 2.R5f6#
- 1...Sc5
- 2.R5f6#
- 1...c5
- 2.R5f6#
- 1...Qd8
- 2.cxd8S#
- 1...Qe8
- 2.R5f6#
- 1...Qf8
- 2.R5f6#
- 1...Qh8
- 2.Re7#
- 1...Rg6
- 2.Re7#
- 1...Rg7
- 2.R5f6#
- 1...Bd3+!
- threat
- 1.Sb6?
- threat
- 2.R5f6#
- 2.R7f6#
- 1...Qxb6
- 2.c8Q#
- 2.c8B#
- 1...Qd8
- 2.cxd8S#
- 1...Qf8
- 2.R5f6#
- 1...Rg6
- 2.Bb3#
- 1...Qh8!
- threat
- 1.Qxg3?
- threat
- 2.Sg5#
- 2.Qe3#
- 2.Qg6#
- 1...Sxh3
- 2.Qe3#
- 2.Qg6#
- 1...Qb4
- 2.Qg6#
- 1...Sb4
- 2.Qg6#
- 1...Sc5
- 2.Qg6#
- 1...c5
- 2.Qg6#
- 1...Qh8
- 2.Sg5#
- 1...Qa7
- 2.Sg5#
- 2.Qg6#
- 1...Qb3
- 2.Sg5#
- 2.Qg6#
- 2.c8Q#
- 2.c8B#
- 1...Qb6
- 2.Sg5#
- 2.Qg6#
- 2.c8Q#
- 2.c8B#
- 1...Qd8
- 2.Qe3#
- 2.cxd8S#
- 1...Qg8
- 2.Qe3#
- 1...Bf3
- 2.Sg5#
- 2.Qg6#
- 1...Bg4
- 2.Sg5#
- 2.Qe3#
- 1...Bh5
- 2.Sg5#
- 2.Qe3#
- 1...Sf3
- 2.Qg6#
- 1...Bd3+!
- threat
- 1.Qxe2+?
- 1...Re3
- 2.Sg5#
- 2.Qxe3#
- 1...Sxe2!
- 1...Re3
- 1.cxb8S?
- threat
- 2.R7f6#
- 1...Sxb8
- 2.Sc7#
- 1...Rg6!
- threat
- 1.Sc3?
- Keys
- 1.Bb3!
- threat
- 2.R5f6#
- 1...Qxb3
- 2.c8Q#
- 2.c8B#
- 1...Rxb3
- 2.Sg5#
- 1...Qd8
- 2.Sc3#
- 2.cxd8S#
- 1...Qh8
- 2.Sc3#
- 1...Rg6
- 2.Sb6#
- threat
- 1.Bb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(h);N_GUARD::P=Q
- Q(h);OGATE::PXQ(h)=S
- R(d);N_GUARD::S(E)
- R(d);N_GUARD,N_SPINB(c)::S(E)
- R(d);N_GUARD::S(E),XR(d)
- P(f);SBLOCK,XS(G)::R1(H)
- Tries
- Try
- S(G);
- Threat
- R1(H)
- Vars
- R(d);N_GUARD,XS(G)::S(E)
- Q(h);N_GUARD::B(B)
- Refutation
- R(d);
- Try
- S(G);N_PINB(c)
- Threat
- DUALS(2)
- Vars
- Q(h);XP(J)::R1(H)
- R(d);N_GUARD,XS(G)::S(E)
- Q(h);::R1(H)
- S(e);::R1(H)
- P(f);::R1(H)
- Q(h);OGATE::PXQ(h)=S
- Q(h);::R1(K)
- R(d);::R1(K)
- R(d);::R1(H)
- Refutation
- B(c);CHECK
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(h);N_GUARD,XS(G)::P=Q
- Q(h);OGATE::PXQ(h)=S
- Q(h);::R1(H)
- R(d);N_GUARD::B(B)
- Refutation
- Q(h);
- Try
- Q(C);N_PINB(c),XR(d)
- Threat
- DUALS(3)
- Vars
- Q(h);::QAR2(C)
- S(e);::QAR2(C)
- P(f);::QAR2(C)
- Q(h);::S(E)
- Q(h);::QAR(C)
- S(a);::QAR2(C)
- Refutation
- B(c);CHECK
- Try
- Q(C);CHECK,XB(c)
- Refutation
- S(a);XQ(C)
- Try
- P(J);XQ(h)
- Threat
- R1(K)
- Vars
- S(e);N_GUARD,XS(J)::S(G)
- Refutation
- R(d);
- Try
- Actual
- B(B);
- Threat
- R1(H)
- Vars
- Q(h);N_GUARD,XB(B)::P=Q
- R(d);N_GUARD,XB(B)::S(E)
- Q(h);N_GUARD::B(B)+S(G)
- R(d);N_GUARD::B(B)+S(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).