MESON Chess Problem Database
Problem Display
PID: 252571 (7b/1K1PBbq1/1p3rp1/R2NP3/2pk3r/2np4/nQ4B1/4R3 w - - 0 1)
Petkov, Petko Andonov
Schach-Aktiv, 1989
#2
9 + 12
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Re4#
- 1...Rh2
- 2.Re4#
- 1...Rh3
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Rh5
- 2.Re4#
- 1...Rh6
- 2.Re4#
- 1...Rh7
- 2.Re4#
- 1...Rf1
- 2.Qxb6#
- 1...Rf2
- 2.Qxf2#
- 2.Qxb6#
- 1...Rf3
- 2.Qxb6#
- 1...Rf4
- 2.Qxb6#
- 1...Rf5
- 2.Qxb6#
- 1...Rc6
- 2.Qf2#
- 1...Rd6
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...Bxd5+
- 2.Rxd5#
- 1...Be6
- 2.Qxb6#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...d2
- 2.Qxd2#
- 1...Rh1
- Tries
- 1.Sf4?
- threat
- 2.Re4#
- 2.Qf2#
- 1...Bd5+
- 2.Rxd5#
- 1...Rfxf4
- 2.Qxb6#
- 1...Rh3
- 2.Re4#
- 1...d2
- 2.Re4#
- 2.Qxd2#
- 1...Rhxf4!
- threat
- 1.Sxb6?
- threat
- 2.Bc5#
- 1...Rxb6+
- 2.Qxb6#
- 1...Bd5+
- 2.Rxd5#
- 1...d2
- 2.Qxd2#
- 1...Re4
- 2.Rxe4#
- 1...Rc6
- 2.Qf2#
- 1...Rd6
- 2.Qf2#
- 1...Qf8!
- threat
- 1.Sxf6?
- threat
- 2.Qf2#
- 2.Qxb6#
- 1...Bd5+
- 2.Rxd5#
- 1...bxa5
- 2.Qf2#
- 2.Qb6#
- 1...d2
- 2.Qxd2#
- 1...Qh6
- 2.Qxb6#
- 1...Rh3
- 2.Re4#
- 2.Qxb6#
- 1...Re4
- 2.Rxe4#
- 2.Qxb6#
- 1...Rf4
- 2.Qxb6#
- 1...Sb4
- 2.Qf2#
- 1...b5
- 2.Qf2#
- 1...Qxf6!
- threat
- 1.Bf3?
- threat
- 2.Qf2#
- 1...Bxd5+
- 2.Rxd5#
- 1...Rxf3
- 2.Qxb6#
- 1...Re4
- 2.Rxe4#
- 1...d2
- 2.Qxd2#
- 1...Rh2
- 2.Re4#
- 1...Qh6!
- threat
- 1.Bd6?
- threat
- 2.Qxb6#
- 1...Bxd5+
- 2.Rxd5#
- 1...Rxd6
- 2.Qf2#
- 1...bxa5
- 2.Qb6#
- 1...d2
- 2.Qxd2#
- 1...Sb4
- 2.Qxc3#
- 1...b5!
- threat
- 1.Bxf6?
- threat
- 2.Qf2#
- 2.Qxb6#
- 1...Bxd5+
- 2.Rxd5#
- 1...bxa5
- 2.Qf2#
- 2.Qb6#
- 1...d2
- 2.Qxd2#
- 1...b5
- 2.Qf2#
- 1...Qh6
- 2.Qxb6#
- 1...Qf8
- 2.Qf2#
- 1...Rh3
- 2.Re4#
- 2.Qxb6#
- 1...Re4
- 2.Rxe4#
- 2.Qxb6#
- 1...Rf4
- 2.Qxb6#
- 1...Sb4
- 2.Qxc3#
- 2.Qf2#
- 1...Qxf6!
- threat
- 1.exf6?
- threat
- 2.Qf2#
- 2.Qxb6#
- 1...Bxd5+
- 2.Rxd5#
- 1...bxa5
- 2.Qf2#
- 2.Qb6#
- 1...Re4
- 2.Rxe4#
- 1...d2
- 2.Qxd2#
- 1...Qh6
- 2.Qxb6#
- 1...Rh3
- 2.Re4#
- 2.Qxb6#
- 1...Rf4
- 2.Qxb6#
- 1...Sb4
- 2.Qxc3#
- 2.Qf2#
- 1...b5
- 2.Qf2#
- 1...Qxf6!
- threat
- 1.Sf4?
- Keys
- 1.Sc7!
- threat
- 2.Sb5#
- 1...Bd5+
- 2.Rxd5#
- 1...d2
- 2.Qxd2#
- 1...Re4
- 2.Rxe4#
- 1...Rf3
- 2.Qxb6#
- 1...Rd6
- 2.Qf2#
- 1...b5
- 2.Sxb5#
- threat
- 1.Sc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 14
- Sets
- R(f);N_GUARD::R1(A)
- R(f);N_GUARD::R1(A),XR(f)
- R(h);N_GUARD::QAB(B),XP(g)
- R(h);N_GUARD::QAB(B)
- B(j);CHECK,OGATE,XS(E)::R1(D),XB(j)
- B(j);S_CUTR(h)::QAB(B),XP(g)
- S(a);N_GUARD::QAB1(B),XS(b)
- P(c);OGATEB::QAR2(B),XP(c)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- B(j);CHECK,N_GUARD::R1(D),XB(j)
- R(h);N_GUARD,XS(E)::QAB(B),XP(g)
- R(f);::R1(A)
- Refutation
- R(f);XS(E)
- Try
- S(E);XP(g)
- Threat
- B(I)
- Vars
- R(h);CHECK,OGATE,XS(E)::QAB(B),XR(h)
- B(j);CHECK,N_GUARD::R1(D),XB(j)
- P(c);OGATEB::QAR2(B),XP(c)
- R(f);N_GUARD::R1(A),XR(f)
- R(h);N_GUARD::QAB(B)
- Refutation
- Q(k);
- Try
- S(E);XR(h)
- Threat
- DUALS(2)
- Vars
- B(j);CHECK,N_GUARD::R1(D),XB(j)
- P(c);OGATEB::QAR2(B),XP(c)
- Q(k);::QAB(B),XP(g)
- R(f);::QAB(B),XP(g)
- S(a);::QAB(B)
- P(g);::QAB(B)
- Refutation
- Q(k);XS(E)
- Try
- B(C);
- Threat
- QAB(B)
- Vars
- B(j);CHECK,OGATE,XS(E)::R1(D),XB(j)
- R(h);N_GUARD,XB(C)::QAB(B),XP(g)
- R(f);N_GUARD::R1(A),XR(f)
- P(c);OGATEB::QAR2(B),XP(c)
- R(f);N_GUARD::R1(A)
- Refutation
- Q(k);
- Try
- B(I);
- Threat
- QAB(B),XP(g)
- Vars
- B(j);CHECK,OGATE,P_PINP(H),XS(E)::R1(D),XB(j)
- R(h);N_GUARD,XB(I)::QAB(B)
- P(g);XR(D)::QAB(B)
- P(c);OGATEB::QAR2(B),XP(c)
- S(a);N_GUARD::QAB1(B),XS(b)
- Refutation
- P(g);
- Try
- B(I);XR(h)
- Threat
- DUALS(2)
- Vars
- B(j);CHECK,OGATE,P_PINP(H),XS(E)::R1(D),XB(j)
- P(c);OGATEB::QAR2(B),XP(c)
- P(g);::QAB(B)
- Q(k);::QAB(B),XP(g)
- Q(k);::QAB(B)
- R(f);::QAB(B),XP(g)
- Refutation
- Q(k);XB(I)
- Try
- P(F);XR(h)
- Threat
- DUALS(2)
- Vars
- B(j);CHECK,OGATE,XS(E)::R1(D),XB(j)
- R(f);N_GUARD::R1(A),XR(f)
- P(c);OGATEB::QAR2(B),XP(c)
- Q(k);::QAB(B),XP(g)
- R(f);::QAB(B),XP(g)
- P(g);::QAB(B)
- Refutation
- Q(k);XP(F)
- Try
- Actual
- S(E);
- Threat
- S(E)
- Vars
- B(j);CHECK,N_GUARD::R1(D),XB(j)
- P(c);OGATEB::QAR2(B),XP(c)
- R(f);N_GUARD::R1(A),XR(f)
- R(h);N_GUARD::QAB(B),XP(g)
- R(h);N_GUARD::QAB(B)
- P(g);::S(E),XP(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).