MESON Chess Problem Database
Problem Display
PID: 258469 (b1Q2RBb/p3r2q/7p/1P2n3/2pNk2r/6P1/K2R2P1/B2N3n w - - 0 1)
Leontieva, Nadezhda Aleksandrovna
Sinfonie Scacchistiche, 1970
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Qf5
- 2.Qxf5#
- 1...Qg7
- 2.Qf5#
- 1...Rh2
- 2.Rf4#
- 1...Rh3
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...Rh5
- 2.Rf4#
- 1...Sd3
- 2.Re2#
- 1...Sg6
- 2.Qf5#
- 1...Qf5
- Tries
- 1.Sf2+?
- 1...Ke3
- 2.Re2#
- 1...Sxf2!
- 1...Ke3
- 1.Se2?
- threat
- 2.Sec3#
- 2.Rd4#
- 1...Rd7
- 2.Sec3#
- 1...Sf3
- 2.gxf3#
- 1...Sg4
- 2.Rf4#
- 1...Sc6
- 2.Bd5#
- 1...Sg6
- 2.Qf5#
- 1...Sd7
- 2.Qxa8#
- 1...Sf7
- 2.Bxh7#
- 1...c3
- 2.Sexc3#
- 2.Rd4#
- 1...Sd3!
- threat
- 1.Sb3?
- threat
- 2.Sc5#
- 2.Rd4#
- 1...Rc7
- 2.Rd4#
- 1...Rd7
- 2.Sc5#
- 1...Sd3
- 2.Re2#
- 1...Sf3
- 2.Sc5#
- 2.gxf3#
- 1...Sg4
- 2.Sc5#
- 2.Rf4#
- 1...Sc6
- 2.Sc5#
- 2.Bd5#
- 1...Sg6
- 2.Sc5#
- 2.Qf5#
- 1...Sd7
- 2.Qxa8#
- 1...Sf7
- 2.Sc5#
- 2.Bxh7#
- 1...cxb3+!
- threat
- 1.Sf3?
- threat
- 2.Rd4#
- 1...Sxf3
- 2.gxf3#
- 1...Sd3
- 2.Re2#
- 1...Sg4
- 2.Rf4#
- 1...Sc6
- 2.Bd5#
- 1...Sg6
- 2.Qf5#
- 1...Sd7
- 2.Qxa8#
- 1...Sf7
- 2.Bxh7#
- 1...Rd7!
- threat
- 1.Sf5?
- threat
- 2.Sc3#
- 2.Sd6#
- 2.Rd4#
- 1...Qxf5
- 2.Rd4#
- 2.Qxf5#
- 1...Sxg3
- 2.Sxg3#
- 2.Sd6#
- 2.Rd4#
- 1...Qg6
- 2.Sc3#
- 2.Rd4#
- 1...Re6
- 2.Sc3#
- 2.Rd4#
- 1...Rd7
- 2.Sc3#
- 1...Sd3
- 2.Sd6#
- 2.Re2#
- 1...Sf3
- 2.Sd6#
- 1...Sg4
- 2.Sd6#
- 1...Sc6
- 2.Sd6#
- 2.Bd5#
- 1...Sg6
- 2.Sd6#
- 1...Sd7
- 2.Sd6#
- 2.Qxa8#
- 1...c3
- 2.Sxc3#
- 2.Sd6#
- 2.Rd4#
- 1...Sf7!
- threat
- 1.Sc6?
- threat
- 2.Bd5#
- 2.Rd4#
- 1...Qxg8
- 2.Rd4#
- 2.Qf5#
- 1...Bxc6
- 2.Rd4#
- 1...Sxc6
- 2.Bd5#
- 1...Qf7
- 2.Rd4#
- 1...Re6
- 2.Rd4#
- 1...Rf7
- 2.Rd4#
- 1...Sd3
- 2.Re2#
- 1...Sf3
- 2.Bd5#
- 2.gxf3#
- 1...Sg4
- 2.Bd5#
- 2.Rf4#
- 1...Sg6
- 2.Bd5#
- 2.Qf5#
- 1...Sd7
- 2.Bd5#
- 1...Sf7
- 2.Bxh7#
- 1...Rd7!
- threat
- 1.Se6?
- threat
- 2.Sc5#
- 2.Rd4#
- 1...Rxe6
- 2.Rd4#
- 1...Qf7
- 2.Sc5#
- 1...Rf7
- 2.Sc5#
- 1...Bf6
- 2.Sc5#
- 1...Sf7
- 2.Sc5#
- 2.Bxh7#
- 1...Rd7
- 2.Sc5#
- 1...Rc7
- 2.Rd4#
- 1...Sf3
- 2.Sc5#
- 2.gxf3#
- 1...Sg4
- 2.Sc5#
- 2.Rf4#
- 1...Sc6
- 2.Sc5#
- 1...Sg6
- 2.Sc5#
- 1...Sd7
- 2.Qxa8#
- 1...Sd3!
- threat
- 1.Sf2+?
- Keys
- 1.Sc2!
- threat
- 2.Sc3#
- 2.Rd4#
- 1...Rd7
- 2.Sc3#
- 1...Sd3
- 2.Re2#
- 1...Sf3
- 2.gxf3#
- 1...Sg4
- 2.Rf4#
- 1...Sc6
- 2.Bd5#
- 1...Sg6
- 2.Qf5#
- 1...Sd7
- 2.Qxa8#
- 1...Sf7
- 2.Bxh7#
- 1...c3
- 2.Sxc3#
- 2.Rd4#
- threat
- 1.Sc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 6
- Sets
- Q(i);N_GUARD::QAB1(I),XQ(i)
- Q(i);N_GUARD::QAB1(I)
- R(d);N_GUARD::R1(J)
- R(d);N_GUARD::R1(J),XR(d)
- S(e);SBLOCK::R(D)
- S(e);S_CUTQ(i)::QAB1(I)
- Tries
- Try
- S(B);CHECK
- Vars
- K(c);P-FLIGHT::R1(D)
- Refutation
- S(a);XS(B)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(h);::S(G)
- S(e);OGATE::P(E),XS(e)
- S(e);S_CUTR(d)::R1(J)
- S(e);S_CUTB(j)::B(K)
- S(e);S_CUTQ(i)::QAB1(I)
- S(e);N_GUARD,S_CUTR(h)::QAB(I),XB(j)
- S(e);N_GUARD,S_CUTR(h)::B(K),XQ(i)
- Refutation
- S(e);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(h);::R1(D)
- R(h);::S(G)
- S(e);SBLOCK::R(D)
- S(e);N_GUARD,S_CUTR(h)::QAB(I),XB(j)
- Refutation
- P(b);CHECK,XS(G)
- Try
- S(G);
- Threat
- R1(D)
- Vars
- S(e);OGATE,XS(G)::P(E),XS(e)
- S(e);SBLOCK::R(D)
- S(e);S_CUTR(d)::R1(J)
- S(e);S_CUTB(j)::B(K)
- S(e);S_CUTQ(i)::QAB1(I)
- S(e);N_GUARD,S_CUTR(h)::QAB(I),XB(j)
- S(e);N_GUARD,S_CUTR(h)::B(K),XQ(i)
- Refutation
- R(h);
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(h);::S(B)
- S(e);::S(G)
- Refutation
- S(e);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(j);XS(G)::R1(D)
- S(e);XS(G)::B(K)
- Q(i);::R1(D)
- R(h);::R1(D)
- S(e);SBLOCK::R(D)
- S(e);::B(K)
- S(e);N_GUARD,S_CUTR(h)::B(K),XQ(i)
- Refutation
- R(h);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(h);XS(G)::R1(D)
- Q(i);::S(G)
- R(h);::S(G)
- B(k);::S(G)
- R(h);::R1(D)
- S(e);::S(G)
- S(e);N_GUARD,S_CUTR(h)::QAB(I),XB(j)
- Refutation
- S(e);
- Try
- Actual
- S(G);
- Threat
- DUALS(2)
- Vars
- R(h);::S(B)
- S(e);SBLOCK::R(D)
- S(e);OGATE::P(E),XS(e)
- S(e);S_CUTR(d)::R1(J)
- S(e);S_CUTB(j)::B(K)
- S(e);S_CUTQ(i)::QAB1(I)
- S(e);N_GUARD,S_CUTR(h)::QAB(I),XB(j)
- S(e);N_GUARD,S_CUTR(h)::B(K),XQ(i)
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).