MESON Chess Problem Database
Problem Display
PID: 93386 (2bBQ2K/pppr2P1/P2P4/NBR5/1k1P4/R1n5/1P6/8 w - - 0 1)
Shedey, Sergey Oleksandrovich
Shakhmaty v SSSR, 1964
#2
12 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxd6
- 2.Rc4#
- 1...Re7
- 2.Rc4#
- 1...Rf7
- 2.Rc4#
- 1...Rxg7
- 2.Rc4#
- 1...Rxd8
- 2.Rc4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Sa2
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Sa4
- 2.Rxa4#
- 1...Se4
- 2.Ra4#
- 1...Sxb5
- 2.Rc4#
- 1...Sd5
- 2.Ra4#
- 1...bxa6
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...cxd6
- 2.Rb3#
- 1...c6
- 2.Rb3#
- 1...Rxd6
- Tries
- 1.Kh7?
- 1...Rxd6
- 2.Rc4#
- 1...Rxd8
- 2.Rc4#
- 1...Sxb5
- 2.Rc4#
- 1...bxa6
- 2.Sc6#
- 1...cxd6
- 2.Rb3#
- 1...Sa4
- 2.Rxa4#
- 1...Re7
- 2.Rc4#
- 1...Rf7
- 2.Rc4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Sa2
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Se4
- 2.Ra4#
- 1...Sd5
- 2.Ra4#
- 1...b6
- 2.Sc6#
- 1...c6
- 2.Rb3#
- 1...Rxg7+!
- 1...Rxd6
- 1.Kg8?
- 1...Rxd6
- 2.Rc4#
- 1...Rxd8
- 2.Rc4#
- 1...Sxb5
- 2.Rc4#
- 1...bxa6
- 2.Sc6#
- 1...cxd6
- 2.Rb3#
- 1...Sa4
- 2.Rxa4#
- 1...Re7
- 2.Rc4#
- 1...Rf7
- 2.Rc4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Sa2
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Se4
- 2.Ra4#
- 1...Sd5
- 2.Ra4#
- 1...b6
- 2.Sc6#
- 1...c6
- 2.Rb3#
- 1...Rxg7+!
- 1...Rxd6
- 1.Bc6?
- threat
- 2.Rb3#
- 2.Rc4#
- 1...bxc6
- 2.Sxc6#
- 1...Sa4
- 2.Rb3#
- 2.Rxa4#
- 2.Rb5#
- 1...Sb5
- 2.Rc4#
- 2.Rxb5#
- 1...b5!
- threat
- 1.Bxc7?
- threat
- 2.Rb3#
- 1...Sxb5
- 2.Rc4#
- 1...b6
- 2.Sc6#
- 1...Rxc7!
- threat
- 1.Ra1?
- threat
- 2.bxc3#
- 1...Sxb5
- 2.Rc4#
- 1...Sa4
- 2.Rxa4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Se4
- 2.Ra4#
- 1...Sd5
- 2.Ra4#
- 1...Sa2!
- threat
- 1.Ra2?
- threat
- 2.bxc3#
- 1...Sxb5
- 2.Rc4#
- 1...Sa4
- 2.Rxa4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Se4
- 2.Ra4#
- 1...Sd5
- 2.Ra4#
- 1...Sxa2!
- threat
- 1.Qh5?
- threat
- 2.Rc4#
- 1...Sa4
- 2.Rxa4#
- 1...Sd5
- 2.Ra4#
- 1...Rxd8+!
- threat
- 1.Qxd7?
- threat
- 2.Rc4#
- 1...Sa4
- 2.Rxa4#
- 1...c6
- 2.Rb3#
- 1...Bxd7!
- threat
- 1.Qe2?
- threat
- 2.Qc4#
- 1...Sxe2
- 2.Ra4#
- 1...Sa4
- 2.Rxa4#
- 1...Rxd8+!
- threat
- 1.Qe3?
- threat
- 2.Qxc3#
- 1...Sxb5
- 2.Rc4#
- 2.Qb3#
- 1...Sa4
- 2.Rxa4#
- 1...Sb1
- 2.Ra4#
- 2.Qb3#
- 1...Sd1
- 2.Ra4#
- 2.Qb3#
- 1...Sa2
- 2.Ra4#
- 2.Qb3#
- 1...Se2
- 2.Ra4#
- 2.Qb3#
- 1...Se4
- 2.Ra4#
- 2.Qb3#
- 1...Sd5
- 2.Ra4#
- 2.Qb3#
- 1...Rxd8+!
- threat
- 1.Qe5?
- threat
- 2.Rc4#
- 1...Sa4
- 2.Rxa4#
- 1...Sd5
- 2.Ra4#
- 1...Rxd8+!
- threat
- 1.Qe6?
- threat
- 2.Qb3#
- 2.Qc4#
- 1...Sa4
- 2.Rxa4#
- 1...Sd5
- 2.Ra4#
- 1...Rxd8+!
- threat
- 1.axb7?
- threat
- 2.Sc6#
- 1...Rxd6
- 2.Rc4#
- 1...c6
- 2.Sxc6#
- 2.Rb3#
- 1...Bxb7!
- threat
- 1.g8Q?
- threat
- 2.Qb3#
- 2.Qc4#
- 1...Sa4
- 2.Rxa4#
- 1...Rf7
- 2.Rc4#
- 1...Sd5
- 2.Ra4#
- 1...Rh7+!
- threat
- 1.g8S?
- 1...Rxd6
- 2.Rc4#
- 1...Rxd8
- 2.Rc4#
- 1...Sxb5
- 2.Rc4#
- 1...bxa6
- 2.Sc6#
- 1...cxd6
- 2.Rb3#
- 1...Sa4
- 2.Rxa4#
- 1...c6
- 2.Rb3#
- 1...Re7
- 2.Rc4#
- 1...Rf7
- 2.Rc4#
- 1...Rg7
- 2.Rc4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Sa2
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Se4
- 2.Ra4#
- 1...Sd5
- 2.Ra4#
- 1...b6
- 2.Sc6#
- 1...Rh7+!
- 1...Rxd6
- 1.g8B?
- 1...Rxd6
- 2.Rc4#
- 1...Rxd8
- 2.Rc4#
- 1...Sxb5
- 2.Rc4#
- 1...bxa6
- 2.Sc6#
- 1...cxd6
- 2.Rb3#
- 1...Sa4
- 2.Rxa4#
- 1...c6
- 2.Rb3#
- 1...Re7
- 2.Rc4#
- 1...Rf7
- 2.Rc4#
- 1...Rg7
- 2.Rc4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Sa2
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Se4
- 2.Ra4#
- 1...Sd5
- 2.Ra4#
- 1...b6
- 2.Sc6#
- 1...Rh7+!
- 1...Rxd6
- 1.g8R?
- 1...Rxd6
- 2.Rc4#
- 1...Rxd8
- 2.Rc4#
- 1...Sxb5
- 2.Rc4#
- 1...bxa6
- 2.Sc6#
- 1...cxd6
- 2.Rb3#
- 1...Sa4
- 2.Rxa4#
- 1...c6
- 2.Rb3#
- 1...Re7
- 2.Rc4#
- 1...Rf7
- 2.Rc4#
- 1...Rg7
- 2.Rc4#
- 1...Sb1
- 2.Ra4#
- 1...Sd1
- 2.Ra4#
- 1...Sa2
- 2.Ra4#
- 1...Se2
- 2.Ra4#
- 1...Se4
- 2.Ra4#
- 1...Sd5
- 2.Ra4#
- 1...b6
- 2.Sc6#
- 1...Rh7+!
- 1...Rxd6
- 1.Kh7?
- Keys
- 1.Ba4!
- 1...Rxd6
- 2.Rb3#
- 1...Rxg7
- 2.Rb3#
- 1...Rxd8
- 2.Rb3#
- 1...Sxa4
- 2.Rb3#
- 1...bxa6
- 2.Sc6#
- 1...cxd6
- 2.Rc4#
- 1...Sb5
- 2.Rxb5#
- 1...b5
- 2.Sc6#
- 1...Re7
- 2.Rb3#
- 1...Rf7
- 2.Rb3#
- 1...Sb1
- 2.Rb5#
- 1...Sd1
- 2.Rb5#
- 1...Sa2
- 2.Rb5#
- 1...Se2
- 2.Rb5#
- 1...Se4
- 2.Rb5#
- 1...Sd5
- 2.Rb5#
- 1...b6
- 2.Sc6#
- 1...c6
- 2.Rc4#
- 1...Rxd6
- 1.Ba4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 15
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(f);XP(H)::R1(F)
- R(f);::R1(F)
- R(f);XP(I)::R1(F)
- R(f);P_PINQ(K),XB(J)::R1(F)
- S(a);N_GUARD::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- S(a);SBLOCK,XB(E)::R1(F)
- P(d);N_GUARD,XP(G)::S(D)
- P(d);N_GUARD::S(D)
- P(e);XP(H)::R1(B)
- P(e);::R1(B)
- Tries
- Try
- K(L);P-FLIGHT,P_SPINP(I)
- Vars
- R(f);N_PINP(I),XP(H)::R1(F)
- R(f);N_PINP(I),XB(J)::R1(F)
- S(a);SBLOCK,XB(E)::R1(F)
- P(d);N_GUARD,XP(G)::S(D)
- P(e);XP(H)::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- R(f);::R1(F)
- S(a);N_GUARD::R1(B)
- P(d);N_GUARD::S(D)
- P(e);::R1(B)
- Refutation
- R(f);CHECK,XP(I)
- Try
- K(L);P-FLIGHT
- Vars
- R(f);XP(H)::R1(F)
- R(f);P_PINQ(K),XB(J)::R1(F)
- S(a);SBLOCK,XB(E)::R1(F)
- P(d);N_GUARD,XP(G)::S(D)
- P(e);XP(H)::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- R(f);::R1(F)
- S(a);N_GUARD::R1(B)
- P(d);N_GUARD::S(D)
- P(e);::R1(B)
- Refutation
- R(f);CHECK,XP(I)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- P(d);XB(E)::S(D),XP(d)
- Refutation
- P(d);
- Try
- B(J);XP(e)
- Threat
- R1(B)
- Vars
- S(a);SBLOCK,XB(E)::R1(F)
- P(d);N_GUARD::S(D)
- Refutation
- R(f);XB(J)
- Try
- R(B);
- Threat
- P(A),XS(a)
- Vars
- S(a);SBLOCK,XB(E)::R1(F)
- S(a);N_GUARD::R1(B),XS(a)
- S(a);N_GUARD::R1(B)
- Refutation
- S(a);
- Try
- R(B);
- Threat
- P(A),XS(a)
- Vars
- S(a);SBLOCK,XB(E)::R1(F)
- S(a);N_GUARD::R1(B),XS(a)
- S(a);N_GUARD::R1(B)
- Refutation
- S(a);XR(B)
- Try
- Q(K);
- Threat
- R1(F)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- S(a);N_GUARD::R1(B)
- Refutation
- R(f);CHECK,XB(J)
- Try
- Q(K);XR(f)
- Threat
- R1(F)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- P(e);::R1(B)
- Refutation
- B(g);XQ(K)
- Try
- Q(K);
- Threat
- QAR1(K)
- Vars
- S(a);N_GUARD,XQ(K)::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- Refutation
- R(f);CHECK,XB(J)
- Try
- Q(K);
- Threat
- QAB1(K),XS(a)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- Refutation
- R(f);CHECK,XB(J)
- Try
- Q(K);
- Threat
- R1(F)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- S(a);N_GUARD::R1(B)
- Refutation
- R(f);CHECK,XB(J)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- S(a);N_GUARD::R1(B)
- Refutation
- R(f);CHECK,XB(J)
- Try
- P(G);XP(d)
- Threat
- S(D)
- Vars
- R(f);XP(H)::R1(F)
- Refutation
- B(g);XP(G)
- Try
- P(I);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::R1(B),XS(a)
- R(f);::R1(F)
- S(a);N_GUARD::R1(B)
- Refutation
- R(f);CHECK
- Try
- P(I);
- Vars
- R(f);XP(H)::R1(F)
- R(f);XB(J)::R1(F)
- S(a);SBLOCK,XB(E)::R1(F)
- P(d);N_GUARD,XP(G)::S(D)
- P(e);XP(H)::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- P(e);::R1(B)
- R(f);::R1(F)
- S(a);N_GUARD::R1(B)
- P(d);N_GUARD::S(D)
- Refutation
- R(f);CHECK
- Try
- P(I);
- Vars
- R(f);XP(H)::R1(F)
- R(f);XB(J)::R1(F)
- S(a);SBLOCK,XB(E)::R1(F)
- P(d);N_GUARD,XP(G)::S(D)
- P(e);XP(H)::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- P(e);::R1(B)
- R(f);::R1(F)
- S(a);N_GUARD::R1(B)
- P(d);N_GUARD::S(D)
- Refutation
- R(f);CHECK
- Try
- P(I);
- Vars
- R(f);XP(H)::R1(F)
- R(f);XB(J)::R1(F)
- S(a);SBLOCK,XB(E)::R1(F)
- P(d);N_GUARD,XP(G)::S(D)
- P(e);XP(H)::R1(B)
- S(a);N_GUARD::R1(B),XS(a)
- P(e);::R1(B)
- R(f);::R1(F)
- S(a);N_GUARD::R1(B)
- P(d);N_GUARD::S(D)
- Refutation
- R(f);CHECK
- Try
- Actual
- B(E);
- Vars
- R(f);XP(H)::R1(B)
- R(f);XP(I)::R1(B)
- R(f);P_PINQ(K),XB(J)::R1(B)
- S(a);SBLOCK,XB(E)::R1(B)
- P(d);N_GUARD,XP(G)::S(D)
- P(e);XP(H)::R1(F)
- S(a);N_GUARD::R1(F),XS(a)
- P(d);N_GUARD::S(D)
- R(f);::R1(B)
- S(a);N_GUARD::R1(F)
- P(e);::R1(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).