MESON Chess Problem Database
Problem Display
PID: 85667 (8/1B1b4/1N1p4/Bk3qRr/1P2Nb2/K1Q4r/3R4/8 w - - 0 1)
Bonivento, Oscar
Canadian Chess Championship, 1980
#2
9 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Rdxd5#
- 1...Qe5
- 2.Sxd6#
- 1...Rh1
- 2.Qd3#
- 2.Qc4#
- 1...Rh2
- 2.Qd3#
- 2.Qc4#
- 1...Rxc3+
- 2.Sxc3#
- 1...Rd3
- 2.Qxd3#
- 1...R3h4
- 2.Qd3#
- 2.Qc4#
- 1...Bxd2
- 2.Sxd6#
- 1...Be3
- 2.Sxd6#
- 2.Qd3#
- 2.Qc4#
- 1...Bg3
- 2.Qd3#
- 2.Qc4#
- 1...Be5
- 2.Rd5#
- 1...Bxg5
- 2.Sxd6#
- 1...Qd5
- Tries
- 1.Ka2?
- threat
- 2.Qc4#
- 1...Rxc3
- 2.Sxc3#
- 1...d5
- 2.Qc5#
- 1...Be6+!
- threat
- 1.Sg3?
- threat
- 2.Qd3#
- 2.Qc4#
- 1...Rxg5
- 2.Qc4#
- 1...Bxg5
- 2.Qc4#
- 1...Be5
- 2.Rd5#
- 2.Qc4#
- 1...Be6
- 2.Qc6#
- 1...d5
- 2.Qc5#
- 1...Rxg3!
- threat
- 1.Sd5?
- threat
- 2.Sc7#
- 1...Qxd5
- 2.Rdxd5#
- 1...Rxc3+!
- threat
- 1.Rd3?
- threat
- 2.Qc4#
- 1...Rxd3
- 2.Qxd3#
- 1...Be6
- 2.Qc6#
- 1...d5
- 2.Qc5#
- 1...Bc1+!
- threat
- 1.Rxf5+?
- 1...Be5
- 2.Sxd6#
- 2.Rd5#
- 1...Bxf5
- 2.Rd5#
- 1...d5
- 2.Rdxd5#
- 1...Rxf5!
- 1...Be5
- 1.Qe3?
- threat
- 2.Sc3#
- 1...Be5
- 2.Rd5#
- 1...Rxe3+!
- threat
- 1.Qf3?
- threat
- 2.Sc3#
- 1...Bxd2
- 2.Sxd6#
- 1...Be5
- 2.Rd5#
- 1...Rxf3+!
- threat
- 1.Qg3?
- threat
- 2.Sc3#
- 1...Bxd2
- 2.Sxd6#
- 1...Be5
- 2.Rd5#
- 1...Rxg3+!
- threat
- 1.Qxh3?
- threat
- 2.Sc3#
- 2.Qf1#
- 2.Qd3#
- 1...Bxd2
- 2.Sxd6#
- 2.Qf1#
- 2.Qd3#
- 1...Bxg5
- 2.Sc3#
- 2.Sxd6#
- 2.Qd3#
- 1...Be3
- 2.Sc3#
- 2.Sxd6#
- 2.Qf1#
- 1...Bg3
- 2.Sc3#
- 2.Qf1#
- 1...Be5
- 2.Rd5#
- 2.Qd3#
- 1...Be6
- 2.Sc3#
- 1...Rxh3+!
- threat
- 1.Ka2?
- Keys
- 1.Kb2!
- threat
- 2.Qc4#
- 1...Rxc3
- 2.Sxc3#
- 1...Qe5
- 2.Sxd6#
- 1...Be5
- 2.Rd5#
- 1...Be6
- 2.Qc6#
- 1...d5
- 2.Qc5#
- threat
- 1.Kb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- Q(d);N_GUARD::R(A),XQ(d)
- Q(d);S_CUTB(b)::S(E),XP(f)
- R(a);CHECK,XQ(C)::S(E),XR(a)
- R(a);N_GUARD::QAB(C),XR(a)
- B(b);N_GUARD,XR(A)::S(E),XP(f)
- B(b);N_SPINQ(d),S_CUTQ(d)::R(A)
- B(b);N_GUARD,N_SPINQ(d),XR(G)::S(E),XP(f)
- Tries
- Try
- K(B);N_SPINQ(C),P-FLIGHT
- Threat
- QAB1(C)
- Vars
- R(a);XQ(C)::S(E),XR(a)
- P(f);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR1(C)
- Refutation
- B(g);CHECK
- Try
- S(E);N_SPINQ(C)
- Threat
- DUALS(2)
- Vars
- R(e);N_SPINQ(d),XR(G)::QAB1(C)
- B(b);N_SPINQ(d),XR(G)::QAB1(C)
- B(g);N_GUARD::QAB1(C)
- P(f);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR1(C)
- Refutation
- R(a);P_PINQ(C),XS(E)
- Try
- S(H);N_PINQ(d)
- Threat
- S(H)
- Vars
- Q(d);OGATE,P_SPINQ(d),XS(H)::R(A),XQ(d)
- Refutation
- R(a);CHECK,XQ(C)
- Try
- R(A);N_SPINQ(C)
- Threat
- QAB1(C)
- Vars
- R(a);OGATE,P_PINQ(C),XR(A)::QAB(C),XR(a)
- B(g);N_GUARD::QAB1(C)
- P(f);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR1(C)
- Refutation
- B(b);CHECK
- Try
- R(G);CHECK,XQ(d)
- Vars
- B(g);XR(G)::R(A)
- P(f);P_SPINP(f)::R(A),XP(f)
- Refutation
- R(e);XR(G)
- Try
- Q(C);
- Threat
- S(E)
- Vars
- B(b);N_SPINQ(d),S_CUTQ(d)::R(A)
- Refutation
- R(a);CHECK,XQ(C)
- Try
- Q(C);
- Threat
- S(E)
- Vars
- B(b);N_GUARD,XR(A)::S(E),XP(f)
- B(b);N_SPINQ(d),S_CUTQ(d)::R(A)
- Refutation
- R(a);CHECK,XQ(C)
- Try
- Q(C);
- Threat
- S(E)
- Vars
- B(b);N_GUARD,XR(A)::S(E),XP(f)
- B(b);N_SPINQ(d),S_CUTQ(d)::R(A)
- Refutation
- R(a);CHECK,XQ(C)
- Try
- Q(C);N_SPINQ(C),XR(a)
- Threat
- DUALS(3)
- Vars
- B(g);::S(E)
- Refutation
- R(e);CHECK,XQ(C)
- Try
- Actual
- K(B);N_SPINQ(C),S_FLIGHT
- Threat
- QAB1(C)
- Vars
- R(a);XQ(C)::S(E),XR(a)
- Q(d);P_PINQ(C),S_CUTB(b)::S(E),XP(f)
- B(b);N_SPINQ(d),P_PINQ(C),S_CUTQ(d)::R(A)
- B(g);N_GUARD::QAB1(C)
- P(f);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR1(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).