MESON Chess Problem Database
Problem Display
PID: 125052 (n6b/Pn1Rp2b/Q6r/PPk4r/qN6/PRBB2pP/p2N2K1/8 w - - 0 1)
Rukhlis, Efim Naumovich
1st Prize, Revista de Sah, 1962
#2
13 + 11
| 254 | Stella Polaris | 1966 |
| 6490 | yacpdb | 2009 |
| 5503 | ISC | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Qxb3
- 2.Sxb3#
- 1...Qxb5
- 2.Qxb5#
- 1...Qxb4
- 2.Bxb4#
- 2.axb4#
- 1...Rxh3
- 2.Rd5#
- 1...Rh4
- 2.Rd5#
- 1...Rd5
- 2.Rxd5#
- 1...Re5
- 2.Bd4#
- 1...Rf5
- 2.Se4#
- 1...Rxa6
- 2.Sxa6#
- 1...Rc6
- 2.Qxc6#
- 1...Rf6
- 2.Bd4#
- 1...Rg6
- 2.Se4#
- 1...Bxd3
- 2.Sxd3#
- 1...Be4+
- 2.Sxe4#
- 1...Bf5
- 2.Rd5#
- 1...Bg6
- 2.Qc6#
- 1...Bg8
- 2.Se4#
- 1...Bxc3
- 2.Rxc3#
- 1...Bd4
- 2.Bxd4#
- 1...Be5
- 2.Rd5#
- 1...Bf6
- 2.Qc6#
- 1...Sd6
- 2.Qc6#
- 1...e5
- 2.Rd5#
- 1...e6
- 2.Qc6#
- 1...Qxb3
- Tries
- 1.Be5?
- threat
- 2.Rc3#
- 2.Rd5#
- 1...Be4+
- 2.Sxe4#
- 1...Qxb3
- 2.Sxb3#
- 1...Qxb5
- 2.Rd5#
- 2.Qxb5#
- 1...Qxa3
- 2.Rd5#
- 1...Qxb4
- 2.axb4#
- 1...Rxe5
- 2.Rc3#
- 1...Bxd3
- 2.Sxd3#
- 2.Rd5#
- 1...Bxe5
- 2.Rd5#
- 1...Sxa5
- 2.Rd5#
- 1...a1Q
- 2.Rd5#
- 1...a1B
- 2.Rd5#
- 1...Rh4
- 2.Rd5#
- 1...Rd6
- 2.Rc3#
- 1...Bg8
- 2.Se4#
- 1...Sd6
- 2.Qc6#
- 1...Sc7
- 2.Rc3#
- 1...e6
- 2.Rc3#
- 2.Qc6#
- 1...Sb6!
- threat
- 1.Bf6?
- threat
- 2.Rc3#
- 2.Qc6#
- 1...Be4+
- 2.Sxe4#
- 1...Qxb3
- 2.Sxb3#
- 2.Qc6#
- 1...Qxb5
- 2.Qxb5#
- 1...Qxa3
- 2.Qc6#
- 1...Qxb4
- 2.Qc6#
- 2.axb4#
- 1...Rxf6
- 2.Rc3#
- 1...Bxd3
- 2.Sxd3#
- 2.Qc6#
- 1...Bxf6
- 2.Qc6#
- 1...a1Q
- 2.Qc6#
- 1...a1B
- 2.Qc6#
- 1...Rh4
- 2.Rd5#
- 2.Qc6#
- 1...Bg8
- 2.Se4#
- 2.Qc6#
- 1...Sd6
- 2.Qc6#
- 1...Sd8
- 2.Rc3#
- 1...Sb6
- 2.Qxb6#
- 1...Sxa5!
- threat
- 1.Bf5?
- threat
- 2.Sd3#
- 2.Rd5#
- 1...Qxb3
- 2.Sd3#
- 1...Qxb5
- 2.Rd5#
- 1...Qxb4
- 2.Bxb4#
- 2.axb4#
- 1...Rxf5
- 2.Sd3#
- 1...Bxf5
- 2.Rd5#
- 1...Bg8
- 2.Sd3#
- 1...Sd6
- 2.Qc6#
- 1...Sb6
- 2.Sd3#
- 1...Sc7
- 2.Sd3#
- 1...e6
- 2.Sd3#
- 2.Qc6#
- 1...Rd6!
- threat
- 1.Bg6?
- threat
- 2.Sd3#
- 2.Qc6#
- 1...Qxb4
- 2.Bxb4#
- 2.Qc6#
- 2.axb4#
- 1...Rxg6
- 2.Sd3#
- 1...Bxg6
- 2.Qc6#
- 1...Sxa5
- 2.Sd3#
- 1...Rd5
- 2.Rxd5#
- 2.Qc6#
- 1...Sd6
- 2.Qc6#
- 1...Sd8
- 2.Sd3#
- 1...Sb6
- 2.Sd3#
- 2.Qxb6#
- 1...Qxb5!
- threat
- 1.Rc7+?
- 1...Rc6
- 2.Rxc6#
- 2.Qxc6#
- 1...Sxc7!
- 1...Rc6
- 1.Qb6+?
- 1...Sxb6
- 2.Sa6#
- 1...Rxb6!
- 1...Sxb6
- 1.Qg6?
- threat
- 2.Se4#
- 2.Sa6#
- 1...Qxb5
- 2.Se4#
- 1...Qxb4
- 2.Bxb4#
- 2.axb4#
- 1...Qxa5
- 2.Se4#
- 1...Rxg6
- 2.Se4#
- 1...Bxg6
- 2.Sa6#
- 1...Rh4
- 2.Sa6#
- 2.Rd5#
- 1...Re5
- 2.Sa6#
- 2.Bd4#
- 1...Sc7
- 2.Se4#
- 2.Rxc7#
- 1...Sd6!
- threat
- 1.Be5?
- Keys
- 1.Qf6!
- threat
- 2.Sa6#
- 2.Bd4#
- 1...Be4+
- 2.Sxe4#
- 1...Qxb5
- 2.Bd4#
- 1...Qxb4
- 2.Bxb4#
- 2.axb4#
- 1...Qxa5
- 2.Bd4#
- 1...Rxf6
- 2.Bd4#
- 1...Bxd3
- 2.Sxd3#
- 2.Sa6#
- 1...Bxf6
- 2.Sa6#
- 1...a1Q
- 2.Sa6#
- 1...a1B
- 2.Sa6#
- 1...Rh4
- 2.Sa6#
- 2.Rd5#
- 1...Rd5
- 2.Sa6#
- 2.Rxd5#
- 1...Sd6
- 2.Bd4#
- 1...Sc7
- 2.Bd4#
- 2.Rxc7#
- 1...e5
- 2.Sa6#
- 2.Rd5#
- threat
- 1.Qf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 18
- Sets
- Q(c);XR(D)::S(A),XQ(c)
- Q(c);OGATE,XP(J)::QAR1(K),XQ(c)
- R(e);N_GUARD,XP(G)::R1(M)
- R(e);N_GUARD::R1(M)
- R(e);N_GUARD::R1(M),XR(e)
- R(e);S_CUTB(k)::B(E)
- R(e);S_CUTB(i)::S(A)
- R(f);XQ(K)::S(H),XR(f)
- R(f);N_GUARD::QAR1(K),XR(f)
- R(f);S_CUTB(k)::B(E)
- R(f);S_CUTB(i)::S(A)
- B(i);XB(F)::S(H),XB(i)
- B(i);CHECK,N_GUARD::S(A),XB(i)
- B(i);S_CUTR(e)::R1(M)
- B(i);S_CUTR(f)::QAR1(K)
- B(i);N_GUARD::S(A)
- B(k);OGATE,XB(E)::R(D),XB(k)
- B(k);N_GUARD::B(E),XB(k)
- B(k);S_CUTR(e)::R1(M)
- B(k);S_CUTR(f)::QAR1(K)
- S(g);S_CUTR(f)::QAR1(K)
- P(h);S_CUTR(e)::R1(M)
- P(h);S_CUTR(f)::QAR1(K)
- Tries
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- B(i);CHECK,N_GUARD::S(A),XB(i)
- Q(c);XR(D)::S(A),XQ(c)
- Q(c);XP(C)::R1(M)
- Q(c);OGATE,XS(H)::P(C),XQ(c)
- R(e);XB(E)::R(D)
- B(k);XB(E)::R1(M)
- S(g);XP(I)::R1(M)
- P(a);::R1(M)
- R(e);::R1(M)
- R(f);::R(D)
- B(i);N_GUARD::S(A)
- S(g);S_CUTR(f)::QAR1(K)
- S(j);::R(D)
- Refutation
- S(j);
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- B(i);CHECK,N_GUARD::S(A),XB(i)
- Q(c);OGATE,XP(J)::QAR1(K),XQ(c)
- Q(c);XP(C)::QAR1(K)
- R(f);XB(E)::R(D)
- B(k);XB(E)::QAR1(K)
- P(a);::QAR1(K)
- S(g);::QAR1(K)
- S(g);::R(D)
- S(j);N_GUARD::QAB1(K),XS(j)
- Refutation
- S(g);XP(I)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(c);XR(D)::S(H)
- Q(c);XP(J)::R1(M)
- R(e);XB(F)::S(H)
- B(i);XB(F)::R1(M)
- B(i);::S(H)
- S(g);S_CUTR(f)::QAR1(K)
- S(j);::S(H)
- Refutation
- R(f);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(f);XB(F)::S(H)
- B(i);XB(F)::QAR1(K)
- S(g);XP(I)::S(H)
- S(g);::QAR1(K)
- S(g);::S(H)
- Refutation
- Q(c);XP(J)
- Try
- R(M);CHECK
- Refutation
- S(j);XR(M)
- Try
- Q(K);CHECK
- Vars
- S(j);XQ(K)::S(H)
- Refutation
- R(f);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- Q(c);XP(J)::S(A)
- Q(c);XP(I)::S(A)
- R(f);XQ(K)::S(A)
- B(i);XQ(K)::S(H)
- Refutation
- S(g);
- Try
- Actual
- Q(K);
- Threat
- DUALS(2)
- Vars
- B(i);CHECK,N_GUARD::S(A),XB(i)
- Q(c);XP(J)::B(E)
- Q(c);XP(I)::B(E)
- R(f);XQ(K)::B(E)
- B(k);XQ(K)::S(H)
- P(a);::S(H)
- S(g);::B(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).