MESON Chess Problem Database
Problem Display
PID: 7439 (k1q5/1R6/2BQN3/8/8/K7/8/8 w - - 0 1)
Dashkovsky, Oleksandr N
2nd Prize=, Bron MT, 1990
#2
5 + 2
| 23 | Die Schwalbe | 2003 |
SOLUTION
- SOUND
- Sets
- 1...Qxe6
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qb8#
- 1...Qd7
- 2.Rxd7#
- 2.Qb8#
- 1...Qxc6
- 2.Qb8#
- 1...Qc7
- 2.Sxc7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxd8#
- 1...Qe8
- 2.Sc7#
- 2.Rd7#
- 1...Qf8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxf8#
- 1...Qg8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qh8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qxe6
- Tries
- 1.Kb2?
- threat
- 2.Qa3#
- 1...Qh8+
- 2.Rg7#
- 1...Qxc6
- 2.Qb8#
- 1...Qc7
- 2.Sxc7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxd8#
- 1...Qf8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxf8#
- 1...Qxb7+!
- threat
- 1.Kb4?
- 1...Qxe6
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qb8#
- 1...Qxc6
- 2.Qb8#
- 1...Qd7
- 2.Rxd7#
- 2.Qb8#
- 1...Qc7
- 2.Sxc7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxd8#
- 1...Qe8
- 2.Sc7#
- 2.Rd7#
- 1...Qf8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxf8#
- 1...Qg8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qh8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qxb7+!
- 1...Qxe6
- 1.Rb4+?
- 1...Qb7
- 2.Ra4#
- 1...Qxc6
- 2.Qb8#
- 1...Ka7!
- 1...Qb7
- 1.Rb5+?
- 1...Qb7
- 2.Ra5#
- 1...Qxc6
- 2.Qb8#
- 1...Ka7!
- 1...Qb7
- 1.Rb6+?
- 1...Qb7
- 2.Ra6#
- 1...Qxc6
- 2.Qb8#
- 1...Ka7!
- 1...Qb7
- 1.Qh2?
- 1...Qf8+
- 2.Re7#
- 1...Qxe6
- 2.Qb8#
- 1...Qxc6
- 2.Qb8#
- 1...Qd7
- 2.Rxd7#
- 2.Qb8#
- 1...Qc7
- 2.Sxc7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qe8
- 2.Sc7#
- 2.Rd7#
- 1...Qg8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qh8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxh8#
- 1...Qxb7!
- 1...Qf8+
- 1.Qg3?
- 1...Qf8+
- 2.Re7#
- 1...Qxe6
- 2.Qb8#
- 1...Qxc6
- 2.Qb8#
- 1...Qd7
- 2.Rxd7#
- 2.Qb8#
- 1...Qc7
- 2.Sxc7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qe8
- 2.Sc7#
- 2.Rd7#
- 1...Qg8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxg8#
- 1...Qh8
- 2.Sc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qxb7!
- 1...Qf8+
- 1.Qf4?
- threat
- 2.Qa4#
- 1...Qf8+
- 2.Re7#
- 2.Qxf8#
- 1...Qxc6
- 2.Qb8#
- 1...Qc7
- 2.Sxc7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qxb7!
- threat
- 1.Qc5?
- threat
- 2.Qa7#
- 2.Qa5#
- 1...Qxc6
- 2.Qa7#
- 1...Qc7
- 2.Sxc7#
- 2.Qa7#
- 1...Qb8
- 2.Ra7#
- 1...Qd8
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Qa7#
- 1...Qf8
- 2.Sc7#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Qxf8#
- 1...Qxb7!
- threat
- 1.Qe5?
- threat
- 2.Qa5#
- 1...Qf8+
- 2.Re7#
- 1...Qxc6
- 2.Qb8#
- 1...Qc7
- 2.Sxc7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Qxb7!
- threat
- 1.Qf8?
- threat
- 2.Sc7#
- 2.Qxc8#
- 1...Qb8
- 2.Sc7#
- 2.Rc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxb8#
- 1...Qd8
- 2.Sc7#
- 2.Qxd8#
- 1...Qe8
- 2.Sc7#
- 2.Qxe8#
- 1...Qxf8+!
- threat
- 1.Qd4?
- threat
- 2.Qa7#
- 2.Qa4#
- 1...Qf8+
- 2.Rb4#
- 1...Qxc6
- 2.Qa7#
- 1...Qc7
- 2.Sxc7#
- 2.Qa7#
- 1...Qb8
- 2.Ra7#
- 1...Qd8
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Qa7#
- 2.Qxd8#
- 1...Qxb7!
- threat
- 1.Qd8?
- threat
- 2.Sc7#
- 2.Qa5#
- 2.Qxc8#
- 1...Qb8
- 2.Sc7#
- 2.Rc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Qxb8#
- 1...Qxd8!
- threat
- 1.Kb2?
- Keys
- 1.Qc7!
- threat
- 2.Ra7#
- 2.Rb8#
- 2.Qa5#
- 2.Qxc8#
- 1...Qf8+
- 2.Rb4#
- 1...Qxe6
- 2.Ra7#
- 2.Rb8#
- 2.Qa5#
- 2.Qb8#
- 1...Qxb7
- 2.Qxb7#
- 1...Qxc7
- 2.Sxc7#
- 1...Qd7
- 2.Ra7#
- 2.Rb8#
- 2.Qa5#
- 2.Qb8#
- 1...Qb8
- 2.Ra7#
- 2.Rxb8#
- 2.Qxb8#
- 1...Qd8
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Ra7#
- 2.Rb8#
- 2.Qxd8#
- 1...Qe8
- 2.Ra7#
- 2.Rb8#
- 2.Qa5#
- 1...Qg8
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Ra7#
- 2.Rb8#
- 2.Qa5#
- 1...Qh8
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Rb6#
- 2.Ra7#
- 2.Rb8#
- 2.Qa5#
- threat
- 1.Qc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(b);N_GUARD,XB(B)::QAR1(C)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::QAR1(C),XQ(b)
- Tries
- Try
- K(A);S_FLIGHT
- Threat
- QAR(C)
- Vars
- Q(b);CHECK,N_GUARD,SBLOCK::B(B)+R(E)
- Q(b);N_GUARD,XB(B)::QAR1(C)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD,P_PINR(E)::QAR1(C),XQ(b)
- Refutation
- Q(b);CHECK,P_SPINQ(b),XR(E)
- Try
- K(A);S_FLIGHT
- Vars
- Q(b);N_GUARD,XB(B)::QAR1(C)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD,P_PINR(E)::QAR1(C),XQ(b)
- Refutation
- Q(b);CHECK,P_SPINQ(b),XR(E)
- Try
- R(E);CHECK
- Vars
- Q(b);P_SPINQ(b)::R(E)
- Q(b);XB(B)::QAR1(C)
- Refutation
- K(a);P-FLIGHT
- Try
- R(E);CHECK
- Vars
- Q(b);P_SPINQ(b)::R(E)
- Q(b);XB(B)::QAR1(C)
- Refutation
- K(a);P-FLIGHT
- Try
- R(E);CHECK
- Vars
- Q(b);P_SPINQ(b)::R(E)
- Q(b);XB(B)::QAR1(C)
- Refutation
- K(a);P-FLIGHT
- Try
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::B(B)+R(E)
- Q(b);N_GUARD,XS(D)::QAR1(C)
- Q(b);N_GUARD,XB(B)::QAR1(C)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::QAR1(C),XQ(b)
- Refutation
- Q(b);P_SPINQ(b),XR(E)
- Try
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::B(B)+R(E)
- Q(b);N_GUARD,XS(D)::QAR1(C)
- Q(b);N_GUARD,XB(B)::QAR1(C)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::QAR1(C),XQ(b)
- Refutation
- Q(b);P_SPINQ(b),XR(E)
- Try
- Q(C);
- Threat
- QAR(C)
- Vars
- Q(b);N_GUARD,XB(B)::QAR1(C)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::QAR1(C),XQ(b)
- Refutation
- Q(b);P_SPINQ(b),XR(E)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(b);XB(B)::QAR1(C)
- Q(b);SBLOCK::B(B)+R(E),DCHECK
- Refutation
- Q(b);P_SPINQ(b),XR(E)
- Try
- Q(C);
- Threat
- QAR(C)
- Vars
- Q(b);CHECK,N_GUARD::B(B)+R(E)
- Q(b);N_GUARD,XB(B)::QAR1(C)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::QAR1(C),XQ(b)
- Refutation
- Q(b);P_SPINQ(b),XR(E)
- Try
- Q(C);P_PINQ(b)
- Threat
- DUALS(2)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XQ(C)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_GUARD::B(B)+R(E)
- Q(b);XB(B)::QAR1(C)
- Q(b);SBLOCK::B(B)+R(E),DCHECK
- Refutation
- Q(b);P_SPINQ(b),XR(E)
- Try
- Q(C);P_PINQ(b)
- Threat
- DUALS(3)
- Refutation
- Q(b);N_SPINQ(b),XQ(C)
- Try
- Actual
- Q(C);
- Threat
- DUALS(4)
- Vars
- Q(b);CHECK,N_GUARD::B(B)+R(E)
- Q(b);OGATE,P_SPINQ(b),XR(E)::QAB1(C),XQ(b)
- Q(b);XQ(C)::S(D),XQ(b)
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).