MESON Chess Problem Database
Problem Display
PID: 151491 (2B3r1/2B1q3/2p1Pr2/R6N/n1pPk3/4P2Q/2K1NPPb/8 w - - 0 1)
Alaikov, Venelin
Probleemblad, 1984
#2
12 + 8
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Sxf6#
- 1...Qb4
- 2.Sxf6#
- 1...Qc5
- 2.Sxf6#
- 1...Qd6
- 2.Sxf6#
- 1...Qxc7
- 2.Sxf6#
- 1...Qd7
- 2.Sxf6#
- 1...Qh7
- 2.Sxf6#
- 1...Qe8
- 2.Sxf6#
- 1...Rf3
- 2.Qxf3#
- 2.gxf3#
- 1...Rf4
- 2.Re5#
- 1...Rf5
- 2.Qxf5#
- 1...Rxe6
- 2.Qf5#
- 2.Qf3#
- 1...Rfg6
- 2.Qf5#
- 2.Qf3#
- 1...Rh6
- 2.Qf5#
- 2.Qf3#
- 1...Rg3
- 2.Re5#
- 1...Bg1
- 2.Re5#
- 1...Bf4
- 2.Qf3#
- 1...Be5
- 2.Rxe5#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sc5
- 2.Sc3#
- 1...Sb6
- 2.Sc3#
- 1...c5
- 2.Bb7#
- 1...Qa3
- Tries
- 1.Seg3+?
- 1...Rxg3
- 2.Re5#
- 1...Bxg3!
- 1...Rxg3
- 1.Sef4?
- threat
- 2.Re5#
- 2.Qf3#
- 1...Qxe6
- 2.Qf3#
- 1...Qxc7
- 2.Sxf6#
- 2.Qf3#
- 1...Rxf4
- 2.Re5#
- 1...Rxe6
- 2.Qf5#
- 2.Qf3#
- 1...Rxg2
- 2.Re5#
- 2.Qxg2#
- 1...Bxf4
- 2.Qf3#
- 1...Qc5
- 2.Sxf6#
- 1...Qd6
- 2.Sxf6#
- 2.Qf3#
- 1...Rf5
- 2.Qxf5#
- 2.Qf3#
- 1...Rg3
- 2.Re5#
- 1...Rg5
- 2.Qf3#
- 1...Bg3
- 2.Re5#
- 1...c5
- 2.Bb7#
- 1...Sc5!
- threat
- 1.Shg3+?
- 1...Rxg3
- 2.Re5#
- 1...Bxg3!
- 1...Rxg3
- 1.Shf4?
- threat
- 2.Re5#
- 2.Qf3#
- 1...Qxe6
- 2.Qf3#
- 1...Qxc7
- 2.Qf3#
- 1...Rxf4
- 2.Re5#
- 1...Rxe6
- 2.Qf5#
- 2.Qf3#
- 1...Rxg2
- 2.Re5#
- 2.Qxg2#
- 1...Bxf4
- 2.Qf3#
- 1...Qd6
- 2.Qf3#
- 1...Rf5
- 2.Qxf5#
- 2.Qf3#
- 1...Rg3
- 2.Re5#
- 1...Rg5
- 2.Qf3#
- 1...Bg3
- 2.Re5#
- 1...Sc5
- 2.Sc3#
- 1...c5
- 2.Bb7#
- 1...Qc5!
- threat
- 1.Bf4?
- threat
- 2.Re5#
- 2.Qf3#
- 2.f3#
- 1...Qxe6
- 2.Qf3#
- 2.f3#
- 1...Rxf4
- 2.Re5#
- 1...Rxe6
- 2.Qf5#
- 2.Qf3#
- 2.f3#
- 1...Rxg2
- 2.Re5#
- 2.Qxg2#
- 2.f3#
- 1...Bxf4
- 2.Qf3#
- 1...Qc5
- 2.Sxf6#
- 1...Sc5
- 2.Sc3#
- 1...Qd6
- 2.Sxf6#
- 2.Qf3#
- 2.f3#
- 1...Qc7
- 2.Sxf6#
- 2.Qf3#
- 2.f3#
- 1...Rf5
- 2.Qxf5#
- 2.Qf3#
- 2.f3#
- 1...Rg3
- 2.Re5#
- 1...Rg5
- 2.Qf3#
- 2.f3#
- 1...Bg3
- 2.Re5#
- 2.f3#
- 1...c5!
- threat
- 1.Qg4+?
- 1...Rf4
- 2.Re5#
- 1...Bf4
- 2.Seg3#
- 2.Shg3#
- 2.Re5#
- 2.Qf3#
- 1...Rxg4!
- 1...Rf4
- 1.Qh4+?
- 1...Rf4
- 2.Re5#
- 1...Bf4
- 2.Re5#
- 1...Rg4!
- 1...Rf4
- 1.f3+?
- 1...Rxf3
- 2.Qxf3#
- 1...Kxe3!
- 1...Rxf3
- 1.Seg3+?
- Keys
- 1.f4!
- threat
- 2.Re5#
- 2.Qf3#
- 1...Qxe6
- 2.Qf3#
- 1...Qxc7
- 2.Sxf6#
- 2.Qf3#
- 1...Rxf4
- 2.Re5#
- 1...Rxe6
- 2.Qf3#
- 1...Rxg2
- 2.Re5#
- 1...Bxf4
- 2.Qf3#
- 1...Qc5
- 2.Sxf6#
- 1...Rg3
- 2.Re5#
- 1...Bg3
- 2.Re5#
- 1...Sc5
- 2.Sc3#
- 1...c5
- 2.Bb7#
- 1...Qd6
- 2.Sxf6#
- 2.Qf3#
- 1...Rf5
- 2.Qf3#
- 1...Rg5
- 2.Qf3#
- threat
- 1.f4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 12
- Sets
- Q(g);N_GUARD::S(I),XR(f)
- Q(g);N_GUARD,XB(K)::S(I),XR(f)
- R(f);S_CUTB(a)::R1(H)
- R(f);N_GUARD::QAB1(F),XR(f)
- R(h);S_CUTB(a)::R1(H)
- B(a);N_GUARD::R1(H)
- B(a);S_CUTR(f)::QAB1(F)
- B(a);N_GUARD::R1(H),XB(a)
- S(b);N_GUARD::S(B)
- S(b);N_GUARD::S(B),XS(b)
- P(e);OGATEB::B(L)
- Tries
- Try
- S(B);CHECK
- Vars
- R(h);XS(B)::R1(H)
- Refutation
- B(a);XS(B)
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- Q(g);XP(J)::QAB1(F)
- R(f);XS(B)::R1(H)
- B(a);XS(B)::QAB1(F)
- Q(g);N_GUARD::S(I),XR(f)
- R(h);::R1(H)
- R(h);::QAB1(F)
- B(a);::R1(H)
- P(e);OGATEB::B(L)
- Refutation
- S(b);
- Try
- S(I);CHECK
- Vars
- R(h);XS(I)::R1(H)
- Refutation
- B(a);XS(I)
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- Q(g);XP(J)::QAB1(F)
- Q(g);XB(K)::QAB1(F)
- R(f);XS(I)::R1(H)
- B(a);XS(I)::QAB1(F)
- Q(g);::QAB1(F)
- R(h);::R1(H)
- R(h);::QAB1(F)
- B(a);::R1(H)
- S(b);N_GUARD::S(B)
- P(e);OGATEB::B(L)
- Refutation
- Q(g);
- Try
- B(K);
- Threat
- DUALS(3)
- Vars
- R(f);XB(K)::R1(H)
- B(a);XB(K)::QAB1(F)
- Q(g);N_GUARD::S(I),XR(f)
- S(b);N_GUARD::S(B)
- R(h);::R1(H)
- Refutation
- P(e);
- Try
- Q(F);CHECK
- Vars
- R(f);P_SPINR(f)::R1(H)
- Refutation
- R(h);XQ(F)
- Try
- Q(F);CHECK
- Vars
- R(f);P_SPINR(f)::R1(H)
- B(a);P_SPINB(a)::R1(H)
- Refutation
- R(h);P_SPINR(h)
- Try
- P(C);CHECK
- Vars
- R(f);OGATE,XP(C)::QAB1(F),XR(f)
- Refutation
- K(d);P-FLIGHT,XP(E)
- Try
- Actual
- P(C);
- Threat
- DUALS(2)
- Vars
- Q(g);XP(J)::QAB1(F)
- R(f);XP(C)::R1(H)
- R(f);XP(J)::QAB1(F)
- R(h);P_PINS(B),XP(D)::R1(H)
- B(a);XP(C)::QAB1(F)
- Q(g);N_GUARD::S(I),XR(f)
- R(h);::R1(H)
- B(a);::R1(H)
- S(b);N_GUARD::S(B)
- P(e);OGATEB::B(L)
- R(f);::QAB1(F)
- R(h);::QAB1(F)
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).