MESON Chess Problem Database
Problem Display
PID: 98532 (5K2/p1N2P1b/r1p3R1/PPkP4/5P2/1P6/1nNQ2p1/4b1q1 w - - 0 1)
Petkov, Petko Andonov
Problemas, 1970
#2
11 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Qe3#
- 2.Qd4#
- 1...Qe3
- 2.Qxe3#
- 1...Qd4
- 2.Qxd4#
- 1...Qf1
- 2.Qe3#
- 2.Qd4#
- 1...Qh1
- 2.Qe3#
- 2.Qd4#
- 1...Rxa5
- 2.Rxc6#
- 1...Bf2
- 2.Qb4#
- 1...Bg3
- 2.Qb4#
- 1...Bh4
- 2.Qb4#
- 1...Sc4
- 2.b4#
- 1...cxb5
- 2.Sxa6#
- 1...cxd5
- 2.Qxd5#
- 1...Qh2
- Tries
- 1.Ke8?
- threat
- 2.f8Q#
- 2.f8B#
- 1...Qe3+
- 2.Qxe3#
- 1...Rxa5
- 2.Rxc6#
- 1...Bxd2
- 2.f8Q#
- 2.f8B#
- 1...cxb5
- 2.Sxa6#
- 1...cxd5
- 2.Qxd5#
- 1...Qf2
- 2.f8Q#
- 2.f8B#
- 1...Qh2
- 2.Qe3#
- 2.Qd4#
- 2.f8Q#
- 2.f8B#
- 1...Qd4
- 2.Qxd4#
- 2.f8Q#
- 2.f8B#
- 1...Qf1
- 2.Qe3#
- 2.Qd4#
- 2.f8Q#
- 2.f8B#
- 1...Qh1
- 2.Qe3#
- 2.Qd4#
- 2.f8Q#
- 2.f8B#
- 1...Rb6
- 2.f8Q#
- 2.f8B#
- 1...Bf2
- 2.Qb4#
- 2.f8Q#
- 2.f8B#
- 1...Bg3
- 2.Qb4#
- 2.f8Q#
- 2.f8B#
- 1...Bh4
- 2.Qb4#
- 1...Bg8
- 2.f8Q#
- 2.f8B#
- 1...Sd1
- 2.f8Q#
- 2.f8B#
- 1...Sd3
- 2.f8Q#
- 2.f8B#
- 1...Sa4
- 2.f8Q#
- 2.f8B#
- 1...Sc4
- 2.b4#
- 1...Bxg6!
- threat
- 1.Se6+?
- 1...Kxb5
- 2.Sa3#
- 1...Kd6!
- 1...Kxb5
- 1.Qxe1?
- threat
- 2.Qb4#
- 2.Qxg1#
- 2.Qe7#
- 1...Rxa5
- 2.Rxc6#
- 2.Qxg1#
- 1...Bxg6
- 2.Qb4#
- 2.Qe7#
- 1...cxb5
- 2.Qb4#
- 2.Qxg1#
- 1...cxd5
- 2.Qb4#
- 1...Qf2
- 2.Qxf2#
- 2.Qb4#
- 2.Qe7#
- 1...Qh2
- 2.Qf2#
- 2.Qb4#
- 2.Qe3#
- 2.Qe7#
- 1...Qe3
- 2.Qb4#
- 2.Qxe3#
- 1...Qd4
- 2.Qe7#
- 1...Qf1
- 2.Qb4#
- 2.Qe3#
- 2.Qe7#
- 1...Qh1
- 2.Qf2#
- 2.Qb4#
- 2.Qe3#
- 2.Qe7#
- 1...Sd1
- 2.Qb4#
- 2.Qe7#
- 1...Sd3
- 2.Qc3#
- 2.Qe7#
- 1...Sc4
- 2.Qb4#
- 2.b4#
- 1...Qxe1!
- threat
- 1.Qc3+?
- 1...Sc4
- 2.Qxc4#
- 2.b4#
- 1...Bxc3!
- 1...Sc4
- 1.Qe2?
- threat
- 2.Qe7#
- 1...Rxa5
- 2.Rxc6#
- 1...cxb5
- 2.Qxb5#
- 1...cxd5
- 2.Sxa6#
- 1...Qe3
- 2.Qxe3#
- 1...Bh4
- 2.b4#
- 1...Sc4
- 2.Qxc4#
- 1...Bxa5!
- threat
- 1.bxa6?
- threat
- 2.Rxc6#
- 1...cxd5
- 2.Qxd5#
- 1...Bxg6!
- threat
- 1.Ke8?
- Keys
- 1.Kg7!
- threat
- 2.f8Q#
- 2.f8B#
- 1...Qd4+
- 2.Qxd4#
- 1...Rxa5
- 2.Rxc6#
- 1...Bxd2
- 2.f8Q#
- 2.f8B#
- 1...Bxg6
- 2.f8Q#
- 2.f8B#
- 1...cxb5
- 2.Sxa6#
- 1...cxd5
- 2.Qxd5#
- 1...Qf2
- 2.f8Q#
- 2.f8B#
- 1...Qh2
- 2.Qe3#
- 2.Qd4#
- 2.f8Q#
- 2.f8B#
- 1...Qe3
- 2.Qxe3#
- 1...Qf1
- 2.Qe3#
- 2.Qd4#
- 2.f8Q#
- 2.f8B#
- 1...Qh1
- 2.Qe3#
- 2.Qd4#
- 2.f8Q#
- 2.f8B#
- 1...Rb6
- 2.f8Q#
- 2.f8B#
- 1...Bf2
- 2.Qb4#
- 2.f8Q#
- 2.f8B#
- 1...Bg3
- 2.Qb4#
- 2.f8Q#
- 2.f8B#
- 1...Bh4
- 2.Qb4#
- 1...Bg8
- 2.f8Q#
- 2.f8B#
- 1...Sd1
- 2.f8Q#
- 2.f8B#
- 1...Sd3
- 2.f8Q#
- 2.f8B#
- 1...Sa4
- 2.f8Q#
- 2.f8B#
- 1...Sc4
- 2.b4#
- threat
- 1.Kg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- Q(b);N_GUARD::QAB(B),XQ(b)
- Q(b);N_GUARD::QAB1(B),XQ(b)
- R(f);N_GUARD,XP(E)::R1(H),XP(g)
- B(a);N_GUARD::QAB1(B)
- S(c);SBLOCK::P(C)
- P(g);SBLOCK,XP(F)::S(I),XR(f)
- P(g);OGATE,XP(G)::QAR1(B),XP(g)
- Tries
- Try
- K(K);P-FLIGHT
- Threat
- P=Q
- Vars
- Q(b);CHECK,N_GUARD::QAB(B),XQ(b)
- R(f);N_GUARD,XP(E)::R1(H),XP(g)
- B(a);XQ(B)::P=Q
- P(g);SBLOCK,XP(F)::S(I),XR(f)
- P(g);OGATE,XP(G)::QAR1(B),XP(g)
- Q(b);::P=Q
- R(f);::P=Q
- B(a);N_GUARD::QAB1(B)
- B(i);::P=Q
- S(c);::P=Q
- S(c);SBLOCK::P(C)
- Refutation
- B(i);P_PINP(J),XR(H)
- Try
- S(I);CHECK
- Vars
- K(e);P-FLIGHT,XP(F)::S(A)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(B);XB(a)
- Threat
- DUALS(3)
- Vars
- P(g);XP(G)::QAB1(B)
- Q(b);::QAB(B)
- Refutation
- Q(b);XQ(B)
- Try
- Q(B);CHECK
- Refutation
- B(a);XQ(B)
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- R(f);N_GUARD,XP(E)::R1(H),XP(g)
- P(g);OGATE,XP(F)::QAR1(B),XP(g)
- P(g);SBLOCK,XP(G)::S(I),XR(f)
- Q(b);N_GUARD::QAB(B),XQ(b)
- B(a);N_GUARD::P(C)
- S(c);N_GUARD::QAR1(B),XS(c)
- Refutation
- B(a);XP(E)
- Try
- P(F);XR(f)
- Threat
- R1(H),XP(g)
- Vars
- P(g);OGATE,XP(G)::QAR1(B),XP(g)
- Refutation
- B(i);XR(H)
- Try
- Actual
- K(K);S_FLIGHT
- Threat
- P=Q
- Vars
- Q(b);CHECK,N_GUARD::QAB1(B),XQ(b)
- R(f);N_GUARD,XP(E)::R1(H),XP(g)
- B(a);XQ(B)::P=Q
- B(i);XR(H)::P=Q
- P(g);SBLOCK,XP(F)::S(I),XR(f)
- P(g);OGATE,XP(G)::QAR1(B),XP(g)
- Q(b);::P=Q
- Q(b);N_GUARD::QAB(B),XQ(b)
- R(f);::P=Q
- B(a);N_GUARD::QAB1(B)
- B(i);::P=Q
- S(c);::P=Q
- S(c);SBLOCK::P(C)
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).