MESON Chess Problem Database
Problem Display
PID: 55193 (4Qbq1/nn5r/NR3p2/3k4/2R5/2B5/p2r4/Kb3B2 w - - 0 1)
Lider, Valentin Viktorovich
2nd Prize, Shakhmaty, 1962
#2
7 + 10
| 3747 | FIDE Album (1962-1964) | 1968 |
SOLUTION
- SOUND
- Sets
- 1...Qe6
- 2.Qxe6#
- 1...Qg1
- 2.Qe6#
- 1...Qg2
- 2.Qe6#
- 1...Qg3
- 2.Qe6#
- 1...Qg5
- 2.Qe6#
- 1...Qg6
- 2.Qe6#
- 1...Qg7
- 2.Qe6#
- 1...Qh8
- 2.Qe6#
- 1...Rb2
- 2.Rd4#
- 1...Rc2
- 2.Rd4#
- 2.Qe4#
- 1...Re2
- 2.Rd4#
- 1...Rf2
- 2.Rd4#
- 1...Rg2
- 2.Rd4#
- 1...Rdh2
- 2.Rd4#
- 1...Rd3
- 2.Qe4#
- 1...Rd4
- 2.Rxd4#
- 1...Rh1
- 2.Sc7#
- 1...Rhh2
- 2.Sc7#
- 1...Rh3
- 2.Sc7#
- 1...Rh4
- 2.Sc7#
- 1...Rh5
- 2.Sc7#
- 1...Rh6
- 2.Sc7#
- 1...Rc7
- 2.Sxc7#
- 1...Re7
- 2.Sb4#
- 1...Rf7
- 2.Qe6#
- 1...Rh8
- 2.Sc7#
- 1...Bd3
- 2.Rd4#
- 1...Be4
- 2.Qxe4#
- 1...Bb4
- 2.Sxb4#
- 1...Bh6
- 2.Sb4#
- 1...Be7
- 2.Sc7#
- 1...Bg7
- 2.Sb4#
- 2.Sc7#
- 2.Qxg8#
- 1...Sb5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Sc5
- 2.Sb4#
- 1...Sd6
- 2.Sb4#
- 2.Rc5#
- 1...f5
- 2.Qe5#
- 1...Qe6
- Tries
- 1.Bg2+?
- 1...Qxg2
- 2.Qe6#
- 1...Rxg2
- 2.Rd4#
- 1...Be4
- 2.Qxe4#
- 1...Kxc4!
- 1...Qxg2
- 1.Bd3?
- threat
- 2.Rd4#
- 2.Qe4#
- 1...Rxd3
- 2.Qe4#
- 1...Bxd3
- 2.Rd4#
- 1...Sc6
- 2.Qxc6#
- 1...Qe6
- 2.Qxe6#
- 1...Qg1
- 2.Qe4#
- 2.Qe6#
- 1...Qg2
- 2.Rd4#
- 2.Qe6#
- 1...Qg6
- 2.Rd4#
- 2.Qe6#
- 1...Re2
- 2.Rd4#
- 1...Rh4
- 2.Sc7#
- 1...Re7
- 2.Sb4#
- 1...Bc5
- 2.Qe4#
- 1...Be7
- 2.Sc7#
- 1...Sb5
- 2.Qc6#
- 2.Qe4#
- 1...Sc5
- 2.Sb4#
- 2.Rd4#
- 1...Sd6
- 2.Sb4#
- 2.Rd4#
- 2.Rc5#
- 1...f5
- 2.Rd4#
- 2.Qe5#
- 1...Qg4!
- threat
- 1.Bxf6?
- threat
- 2.Qe5#
- 1...Re2
- 2.Rd4#
- 1...Rd3
- 2.Qe4#
- 1...Bd3
- 2.Rd4#
- 1...Sc6
- 2.Qxc6#
- 1...Qe6
- 2.Qxe6#
- 1...Qg3
- 2.Qe6#
- 1...Qg5
- 2.Qe6#
- 1...Rh5
- 2.Sc7#
- 1...Re7
- 2.Sb4#
- 1...Be7
- 2.Sc7#
- 1...Bd6!
- threat
- 1.Rc5+?
- 1...Sxc5
- 2.Sb4#
- 1...Bxc5!
- 1...Sxc5
- 1.Rxf6?
- threat
- 2.Qe5#
- 1...Qe6
- 2.Qxe6#
- 1...Re2
- 2.Rd4#
- 1...Rd3
- 2.Qe4#
- 1...Bd3
- 2.Rd4#
- 1...Qg3
- 2.Qe6#
- 1...Qg5
- 2.Qe6#
- 1...Rd4
- 2.Rxd4#
- 1...Rh5
- 2.Sc7#
- 1...Re7
- 2.Sb4#
- 1...Be7
- 2.Sc7#
- 1...Sc6
- 2.Qxc6#
- 1...Bd6!
- threat
- 1.Qb5+?
- 1...Bc5
- 2.Sb4#
- 1...Sc5
- 2.Sb4#
- 1...Sxb5!
- 1...Bc5
- 1.Qd7+?
- 1...Bd6
- 2.Sb4#
- 2.Sc7#
- 1...Sd6
- 2.Sb4#
- 2.Sc7#
- 1...Rxd7!
- 1...Bd6
- 1.Bg2+?
- Keys
- 1.Qe7!
- threat
- 2.Sb4#
- 2.Sc7#
- 1...Rxe7
- 2.Sb4#
- 1...Bxe7
- 2.Sc7#
- 1...Re2
- 2.Rd4#
- 1...Rd3
- 2.Qe4#
- 1...Bd3
- 2.Rd4#
- 1...Qg3
- 2.Sb4#
- 2.Qe6#
- 1...Rb2
- 2.Sc7#
- 2.Rd4#
- 1...Sb5
- 2.Sb4#
- 1...Sc6
- 2.Sc7#
- threat
- 1.Qe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 28
- Sets
- Q(j);N_GUARD::QAB1(G),XQ(j)
- Q(j);N_GUARD::QAB1(G)
- R(c);N_GUARD::R1(D)
- R(c);S_CUTB(a)::QAB1(G)
- R(c);N_GUARD::R1(D),XR(c)
- R(h);N_GUARD::S(E)
- R(h);N_GUARD::S(E),XR(h)
- R(h);S_CUTB(i)::S(E)
- R(h);S_CUTQ(j)::QAB1(G)
- B(a);S_CUTR(c)::R1(D)
- B(a);N_GUARD::QAB1(G),XB(a)
- B(i);N_GUARD::S(E),XB(i)
- B(i);N_GUARD::S(E)
- B(i);S_CUTR(h)::S(E)
- S(f);N_GUARD::QAB1(G)
- S(f);N_GUARD::QAB1(G),XS(f)
- S(g);S_CUTB(i)::S(E)
- P(e);N_GUARD::QAR1(G)
- Tries
- Try
- B(B);CHECK
- Vars
- Q(j);XB(B)::QAB1(G)
- R(c);XB(B)::R1(D)
- B(a);N_GUARD,P_SPINB(a)::QAB1(G),XB(a)
- Refutation
- K(d);S_FLIGHT,XR(D)
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- R(c);XB(B)::QAB1(G)
- B(a);XB(B)::R1(D)
- S(f);N_GUARD::QAB1(G),XS(f)
- Q(j);N_GUARD::QAB1(G),XQ(j)
- R(c);::R1(D)
- R(h);N_GUARD::S(E)
- R(h);S_CUTB(i)::S(E)
- B(i);::QAB1(G)
- B(i);S_CUTR(h)::S(E)
- Refutation
- Q(j);
- Try
- B(C);XP(e)
- Threat
- QAR1(G)
- Vars
- R(c);N_GUARD::R1(D)
- R(c);S_CUTB(a)::QAB1(G)
- B(a);S_CUTR(c)::R1(D)
- S(f);N_GUARD::QAB1(G),XS(f)
- Q(j);N_GUARD::QAB1(G),XQ(j)
- Q(j);N_GUARD::QAB1(G)
- R(h);N_GUARD::S(E)
- R(h);S_CUTB(i)::S(E)
- B(i);S_CUTR(h)::S(E)
- Refutation
- B(i);
- Try
- R(D);CHECK
- Vars
- S(g);SBLOCK,XR(D)::S(E)
- Refutation
- B(i);XR(D)
- Try
- R(F);XP(e)
- Threat
- QAR1(G)
- Vars
- Q(j);N_GUARD::QAB1(G),XQ(j)
- R(c);N_GUARD::R1(D)
- R(c);S_CUTB(a)::QAB1(G)
- B(a);S_CUTR(c)::R1(D)
- Q(j);N_GUARD::QAB1(G)
- R(c);N_GUARD::R1(D),XR(c)
- R(h);N_GUARD::S(E)
- R(h);S_CUTB(i)::S(E)
- B(i);S_CUTR(h)::S(E)
- S(f);N_GUARD::QAB1(G),XS(f)
- Refutation
- B(i);
- Try
- Q(G);CHECK
- Vars
- B(i);P_SPINB(i)::S(E)
- S(g);P_SPINS(g)::S(E)
- Refutation
- S(f);XQ(G)
- Try
- Q(G);CHECK
- Refutation
- R(h);XQ(G)
- Try
- Actual
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(h);XQ(G)::S(E)
- B(i);XQ(G)::S(E)
- R(c);N_GUARD::R1(D)
- R(c);S_CUTB(a)::QAB1(G)
- B(a);S_CUTR(c)::R1(D)
- S(f);::S(E)
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).