MESON Chess Problem Database
Problem Display
PID: 96634 (2KR1B2/2b2N2/Q5rr/Np1p4/1Pbk1p1R/1n3B2/1PPP4/3n4 w - - 0 1)
Petkov, Petko Andonov
Problemas, 1966
#2
12 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Rxf4#
- 1...Bf1
- 2.Rxd5#
- 1...Be2
- 2.Rxd5#
- 1...Bd3
- 2.Rxd5#
- 1...Bxa5
- 2.Rxf4#
- 1...Bb6
- 2.Rxf4#
- 1...Bd6
- 2.Sc6#
- 1...Bxd8
- 2.Rxf4#
- 1...Sc3
- 2.bxc3#
- 1...Sa1
- 2.Bc5#
- 1...Sc1
- 2.Bc5#
- 1...Sxd2
- 2.Bc5#
- 1...Sxa5
- 2.Bc5#
- 1...Sc5
- 2.Bxc5#
- 1...Rd6
- Tries
- 1.Bd6?
- threat
- 2.Sc6#
- 2.Rxf4#
- 1...Rxd6
- 2.Rxf4#
- 1...Rxh4
- 2.Sc6#
- 1...Bxa5
- 2.Be5#
- 2.Rxf4#
- 1...Bxd6
- 2.Sc6#
- 1...Sxd2
- 2.Bc5#
- 1...Sxa5
- 2.Bc5#
- 2.Rxf4#
- 1...Rg4
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 1...Rf6
- 2.Sc6#
- 1...Bf1
- 2.Rxf4#
- 1...Be2
- 2.Rxf4#
- 1...Sf2
- 2.Sc6#
- 1...Sc3
- 2.Sc6#
- 2.bxc3#
- 1...Sc5
- 2.Sc6#
- 2.Bxc5#
- 1...Bd3!
- threat
- 1.Bg7+?
- 1...Rf6
- 2.Sc6#
- 1...Be5
- 2.Bxe5#
- 2.Rxf4#
- 1...Rxg7!
- 1...Rf6
- 1.Rd6?
- threat
- 2.Sc6#
- 2.Rxf4#
- 1...Rxd6
- 2.Rxf4#
- 1...Rxh4
- 2.Sc6#
- 1...Bxa5
- 2.Rxf4#
- 1...Bxd6
- 2.Sc6#
- 1...Sxa5
- 2.Rxf4#
- 1...Rg4
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 1...Rf6
- 2.Sc6#
- 1...Bf1
- 2.Rxf4#
- 2.Rxd5#
- 1...Be2
- 2.Rxf4#
- 2.Rxd5#
- 1...Bd3
- 2.Rxd5#
- 1...Sf2
- 2.Sc6#
- 1...Sc3
- 2.Sc6#
- 2.bxc3#
- 1...Sc5
- 2.Sc6#
- 1...Sxd2!
- threat
- 1.Qb6+?
- 1...Bxb6
- 2.Rxf4#
- 1...Sc5
- 2.Bxc5#
- 2.Qxc5#
- 1...Rxb6!
- 1...Bxb6
- 1.Qe6?
- threat
- 2.Sc6#
- 2.Qe4#
- 1...Bxa5
- 2.Rxf4#
- 2.Qe4#
- 2.Qe5#
- 1...Bxd8
- 2.Sc6#
- 2.Rxf4#
- 2.Qe5#
- 1...Sxd2
- 2.Sc6#
- 2.Bc5#
- 1...Sxa5
- 2.Bc5#
- 2.Qe4#
- 1...Bf1
- 2.Rxd5#
- 2.Qxd5#
- 2.Qe4#
- 1...Be2
- 2.Rxd5#
- 2.Qxd5#
- 2.Qe4#
- 1...Bd3
- 2.Rxd5#
- 2.Qxd5#
- 1...Be5
- 2.Sc6#
- 2.Qxe5#
- 1...Bd6
- 2.Sc6#
- 1...Sf2
- 2.Sc6#
- 2.Qe3#
- 1...Sc3
- 2.Sc6#
- 2.Qe3#
- 2.bxc3#
- 2.dxc3#
- 1...Sc5
- 2.Sc6#
- 2.Bxc5#
- 1...Rxe6!
- threat
- 1.Qf6+?
- 1...Be5
- 2.Sc6#
- 2.Rxf4#
- 2.Qxe5#
- 1...Rxf6!
- 1...Be5
- 1.Qxg6?
- threat
- 2.Sc6#
- 2.Qe4#
- 1...Bxa5
- 2.Bg7#
- 2.Rxf4#
- 2.Qe4#
- 1...Bxd8
- 2.Sc6#
- 2.Rxf4#
- 1...Sxd2
- 2.Bc5#
- 1...Sxa5
- 2.Bc5#
- 2.Qe4#
- 1...Bf1
- 2.Rxd5#
- 2.Qe4#
- 1...Be2
- 2.Rxd5#
- 2.Qe4#
- 1...Bd3
- 2.Rxd5#
- 2.Qxd3#
- 1...Bd6
- 2.Sc6#
- 1...Sf2
- 2.Sc6#
- 2.c3#
- 1...Sc3
- 2.Sc6#
- 2.Qg1#
- 2.bxc3#
- 1...Sc5
- 2.Sc6#
- 2.Bxc5#
- 1...Rxg6!
- threat
- 1.Qa7+?
- 1...Bb6
- 2.Rxf4#
- 1...Sc5
- 2.Bxc5#
- 2.Qxc5#
- 1...Rb6!
- 1...Bb6
- 1.Bd6?
- Keys
- 1.Qd6!
- threat
- 2.Sc6#
- 2.Rxf4#
- 1...Rxd6
- 2.Rxf4#
- 1...Rxh4
- 2.Sc6#
- 1...Bxa5
- 2.Rxf4#
- 2.Qxf4#
- 2.Qe5#
- 1...Bxd6
- 2.Sc6#
- 1...Sxd2
- 2.Qc5#
- 1...Sxa5
- 2.Rxf4#
- 2.Qc5#
- 1...Rg4
- 2.Sc6#
- 1...Re6
- 2.Sc6#
- 1...Rf6
- 2.Sc6#
- 1...Bf1
- 2.Rxf4#
- 2.Qxd5#
- 1...Be2
- 2.Rxf4#
- 2.Qxd5#
- 1...Bd3
- 2.Qxd5#
- 1...Sf2
- 2.Sc6#
- 1...Sc3
- 2.Sc6#
- 2.bxc3#
- 1...Sc5
- 2.Sc6#
- 2.Qxc5#
- threat
- 1.Qd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 10
- Sets
- R(h);S_CUTB(j)::R(F),XP(e)
- B(c);N_GUARD::R1(K),XP(g)
- B(j);N_GUARD,XS(G)::R(F),XP(e)
- B(j);N_GUARD::R(F),XP(e)
- B(j);S_CUTR(h)::S(G)
- B(j);N_GUARD,XR(K)::R(F),XP(e)
- S(a);OGATE::P(A),XS(a)
- S(b);N_GUARD::B(L)
- S(b);N_GUARD,XP(C)::B(L)
- S(b);N_GUARD,XS(G)::B(L)
- S(b);N_GUARD::B(L),XS(b)
- Tries
- Try
- B(L);
- Threat
- DUALS(2)
- Vars
- R(h);XB(L)::R(F),XP(e)
- R(i);N_SPINP(e),XR(F)::S(G)
- B(j);XB(L)::S(G)
- S(b);N_GUARD,XP(C)::B(L)
- R(h);N_SPINP(e)::S(G)
- R(h);::S(G)
- B(c);::R(F),XP(e)
- S(a);::S(G)
- Refutation
- B(c);
- Try
- B(L);CHECK
- Vars
- R(h);P_SPINR(h)::S(G)
- Refutation
- R(h);XB(L)
- Try
- R(K);
- Threat
- DUALS(2)
- Vars
- R(h);XR(K)::R(F),XP(e)
- R(i);N_SPINP(e),P_SPINP(g),XR(F)::S(G)
- B(j);XS(G)::R(F),XP(e)
- B(j);XR(K)::S(G)
- S(b);XS(G)::R(F),XP(e)
- R(h);N_SPINP(e),P_SPINP(g)::S(G)
- R(h);::S(G)
- B(c);N_GUARD::R1(K),XP(g)
- S(a);::S(G)
- S(b);::S(G)
- Refutation
- S(b);XP(C)
- Try
- Q(H);CHECK
- Vars
- B(j);XQ(H)::R(F),XP(e)
- Refutation
- R(h);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- B(j);::S(G)
- Refutation
- R(h);XQ(H)
- Try
- Q(H);CHECK
- Refutation
- R(h);XQ(H)
- Try
- Q(H);XR(h)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,XP(C)::B(L)
- B(j);::S(G)
- Refutation
- R(i);XQ(H)
- Try
- Q(H);CHECK
- Vars
- B(j);P_SPINB(j)::R(F),XP(e)
- Refutation
- R(h);P_SPINR(h)
- Try
- Actual
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(h);XQ(H)::R(F),XP(e)
- R(i);N_SPINP(e),P_SPINP(g),XR(F)::S(G)
- B(j);XQ(H)::S(G)
- S(b);N_GUARD,XP(C)::QAB1(H)
- R(h);N_SPINP(e),P_SPINP(g)::S(G)
- R(h);::S(G)
- B(c);N_GUARD::QAR1(H),XP(g)
- S(a);::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).