MESON Chess Problem Database
Problem Display
PID: 15328 (Bn1r4/4q2b/6Q1/R1N5/3k3b/2r1R3/1NpP3B/1nK5 w - - 0 1)
Rudenko, Valentin Fedorovich
Radjanska Ukraina, 1982
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxc5
- 2.Re4#
- 1...Qg5
- 2.Se6#
- 2.Re4#
- 1...Qd6
- 2.Re4#
- 1...Qf6
- 2.Re4#
- 1...Qf8
- 2.Se6#
- 2.Be5#
- 2.Re4#
- 1...Qe4
- 2.Rxe4#
- 1...Qe5
- 2.Bxe5#
- 1...Qe6
- 2.Sxe6#
- 1...Qa7
- 2.Se6#
- 2.Be5#
- 2.Re4#
- 1...Qb7
- 2.Se6#
- 1...Qc7
- 2.Se6#
- 2.Re4#
- 1...Qd7
- 2.Be5#
- 2.Re4#
- 1...Qf7
- 2.Be5#
- 2.Re4#
- 1...Qg7
- 2.Se6#
- 2.Re4#
- 1...Rb3
- 2.Sxb3#
- 1...Rd3
- 2.Rxd3#
- 1...Rc4
- 2.Sb3#
- 2.Rd3#
- 1...Rxc5
- 2.Rd3#
- 1...Qxc5
- Tries
- 1.Rxc3?
- threat
- 2.Sb3#
- 2.Rd3#
- 2.Rc4#
- 2.Ra4#
- 1...Qxc5
- 2.Rd3#
- 1...Bxg6
- 2.Sb3#
- 2.Rc4#
- 2.Ra4#
- 1...Sxd2
- 2.Rd3#
- 1...Sxc3
- 2.Sb3#
- 1...Qb7
- 2.Se6#
- 2.Rd3#
- 1...Bg3
- 2.Sb3#
- 1...Sc6
- 2.Sb3#
- 2.Rd3#
- 1...Qe2
- 2.Sb3#
- 1...Qe3
- 2.Sb3#
- 2.Rc4#
- 2.Ra4#
- 1...Qe4
- 2.Sb3#
- 2.Rc4#
- 2.Ra4#
- 1...Qe6
- 2.Sxe6#
- 2.Rd3#
- 1...Qa7
- 2.Sb3#
- 2.Se6#
- 2.Rd3#
- 2.Rc4#
- 1...Qd7
- 2.Sb3#
- 2.Rd3#
- 2.Rc4#
- 1...Qf7
- 2.Rd3#
- 1...Qe8
- 2.Sb3#
- 2.Rd3#
- 2.Rc4#
- 1...Bg8
- 2.Rd3#
- 2.Qd3#
- 1...Sa3
- 2.Sb3#
- 2.Rd3#
- 1...Sa6
- 2.Sb3#
- 2.Rd3#
- 2.Rc4#
- 1...Qe1+!
- threat
- 1.Ra4+?
- 1...Rc4
- 2.Sb3#
- 2.Rxc4#
- 1...Kxc5!
- 1...Rc4
- 1.Qg1?
- threat
- 2.Rd3#
- 2.Re4#
- 1...Qxe3
- 2.Se6#
- 1...Rxe3
- 2.Sb3#
- 1...Qb7
- 2.Se6#
- 2.Rd3#
- 1...Sc6
- 2.Rd3#
- 1...Qe4
- 2.Rd3#
- 2.Rxe4#
- 1...Rd3
- 2.Rxd3#
- 2.Re4#
- 1...Bg3
- 2.Re4#
- 1...Bd3
- 2.Rxd3#
- 2.Re4#
- 1...Be4
- 2.Rd3#
- 2.Rxe4#
- 1...Bf2!
- threat
- 1.Qg4+?
- 1...Qe4
- 2.Se6#
- 1...Be4!
- 1...Qe4
- 1.Qg7+?
- 1...Qf6
- 2.Se6#
- 1...Qe5
- 2.Se6#
- 2.Bxe5#
- 2.Qxe5#
- 1...Qxg7
- 2.Se6#
- 1...Bf6!
- 1...Qf6
- 1.dxc3+?
- 1...Sxc3
- 2.Rd3#
- 1...Kxe3!
- 1...Sxc3
- 1.Rxc3?
- Keys
- 1.Qb6!
- threat
- 2.Sb3#
- 2.Se6#
- 1...Qxc5
- 2.Be5#
- 1...Rxc5
- 2.Ra4#
- 1...Qe6
- 2.Sb3#
- 2.Sxe6#
- 1...Rb3
- 2.Sxb3#
- 2.Se6#
- threat
- 1.Qb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- Q(f);N_GUARD,XS(G)::R1(E)
- Q(f);N_GUARD::R1(E)
- Q(f);N_GUARD::R1(E),XQ(f)
- Q(f);N_GUARD::B(D),XQ(f)
- Q(f);N_GUARD::S(G),XQ(f)
- Q(f);N_GUARD::S(G)
- R(c);N_GUARD::S(G),XR(c)
- R(c);N_GUARD::R1(E),XR(c)
- R(c);N_GUARD,XS(G)::R1(E)
- Tries
- Try
- R(E);XR(c)
- Threat
- DUALS(4)
- Vars
- Q(f);XS(G)::R1(E)
- S(a);XP(C)::R1(E)
- S(a);XR(E)::S(G)
- B(e);::S(G)
- Q(f);::S(G)
- Q(f);::R1(E)
- Refutation
- Q(f);CHECK
- Try
- R(F);CHECK
- Refutation
- K(d);S_FLIGHT,XS(G)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD,P_PINP(C),P_SPINQ(f),XR(E)::S(G)
- R(c);N_GUARD,P_SPINR(c),XR(E)::S(G)
- S(h);::QAB(H)+R(E),DCHECK
- B(e);::QAB(H)+R(E),DCHECK
- Refutation
- B(e);
- Try
- Q(H);CHECK
- Vars
- Q(f);P_SPINQ(f)::S(G)
- Refutation
- B(g);P_SPINB(g)
- Try
- Q(H);CHECK
- Vars
- Q(f);P_SPINQ(f)::S(G)
- Q(f);XQ(H)::S(G)
- Refutation
- B(e);P_SPINB(e)
- Try
- P(C);CHECK,XR(c)
- Vars
- S(a);XP(C)::R1(E)
- Refutation
- K(d);S_FLIGHT,XR(E)
- Try
- Actual
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(f);N_GUARD,P_SPINQ(f),XS(G)::B(D)
- R(c);N_GUARD,P_SPINR(c),XS(G)::R(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).