MESON Chess Problem Database
Problem Display
PID: 250171 (1bq4B/2pP1P1p/5R2/2p1k2r/2P2n2/3Bp3/3n2Qp/7K w - - 0 1)
Vilner, Yakov Semyonovich
64 Shakhmatnoe obozrenie, 1927
#2
8 + 11
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Rd6#
- 1...Qa6
- 2.Rxa6#
- 2.Rb6#
- 2.Rc6#
- 1...Qb7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rg6#
- 2.Rh6#
- 1...Qxd7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rg6#
- 2.Rh6#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 2.Qb2#
- 1...Sb3
- 2.Qe4#
- 1...Sxc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se2
- 2.Qd5#
- 1...Sxd3
- 2.Qd5#
- 1...Sh3
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Se6
- 2.Qd5#
- 1...Sg6
- 2.Qd5#
- 1...Kd4
- Tries
- 1.Qc6?
- threat
- 2.Rf5#
- 2.Re6#
- 1...Kd4
- 2.Rd6#
- 1...Sxd3
- 2.Qd5#
- 1...Rf5
- 2.Rxf5#
- 2.Re6#
- 1...Se4
- 2.Qxe4#
- 1...Se2
- 2.Rf5#
- 2.Qd5#
- 2.Qxc5#
- 1...Sg2
- 2.Rf5#
- 2.Qd5#
- 2.Qxc5#
- 1...Sh3
- 2.Rf5#
- 2.Qd5#
- 2.Qxc5#
- 1...Sd5
- 2.Rf5#
- 2.Qxd5#
- 1...Se6
- 2.Rf5#
- 2.Qd5#
- 1...Sg6
- 2.Rf5#
- 2.Qd5#
- 2.Qxc5#
- 1...Qxh8!
- threat
- 1.Qa8?
- threat
- 2.Qa1#
- 1...Qb7+
- 2.Rc6#
- 1...Kd4
- 2.Rd6#
- 1...Qxd7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rg6#
- 2.Rh6#
- 1...Sxc4
- 2.Qe4#
- 1...Sxd3
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 1...Qa6
- 2.Rxa6#
- 2.Rb6#
- 2.Rc6#
- 1...Sb1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sf3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se2
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Ba7!
- threat
- 1.Qg5+?
- 1...Kd4
- 2.Rd6#
- 1...Rxg5!
- 1...Kd4
- 1.dxc8Q?
- threat
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...Kd4
- 2.Rd6#
- 1...Sxd3
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 1...Rf5
- 2.Re6#
- 1...Rg5
- 2.Re6#
- 2.Rg6#
- 1...Rh6
- 2.Re6#
- 2.Rg6#
- 2.Rxh6#
- 1...Se4
- 2.Qxe4#
- 1...Se2
- 2.Qd5#
- 1...Sh3
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sg6
- 2.Qd5#
- 1...c6
- 2.Rxc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...h6
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rxh6#
- 1...Sxg2!
- threat
- 1.dxc8B?
- threat
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...Kd4
- 2.Rd6#
- 1...Sxd3
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 1...Rf5
- 2.Re6#
- 1...Rg5
- 2.Re6#
- 2.Rg6#
- 1...Rh6
- 2.Re6#
- 2.Rg6#
- 2.Rxh6#
- 1...Se4
- 2.Qxe4#
- 1...Se2
- 2.Qd5#
- 1...Sh3
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sg6
- 2.Qd5#
- 1...c6
- 2.Rxc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...h6
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rxh6#
- 1...Sxg2!
- threat
- 1.d8S?
- threat
- 2.Sc6#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...Kd4
- 2.Rd6#
- 1...Sxg2
- 2.Sc6#
- 1...Sxd3
- 2.Sc6#
- 2.Qd5#
- 1...Qe6
- 2.Rxe6#
- 1...Se6
- 2.Qd5#
- 1...Rf5
- 2.Sc6#
- 2.Re6#
- 1...Qg4
- 2.Sc6#
- 2.Re6#
- 2.Rg6#
- 1...Qf5
- 2.Sc6#
- 2.Re6#
- 1...Qa6
- 2.Rxa6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 1...Qb7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...Qd7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...Rg5
- 2.Sc6#
- 2.Re6#
- 2.Rg6#
- 1...Rh6
- 2.Sc6#
- 2.Re6#
- 2.Rg6#
- 2.Rxh6#
- 1...Se4
- 2.Sc6#
- 2.Qxe4#
- 1...Se2
- 2.Sc6#
- 2.Qd5#
- 1...Sh3
- 2.Sc6#
- 2.Qd5#
- 1...Sd5
- 2.Sc6#
- 2.Qxd5#
- 1...Sg6
- 2.Sc6#
- 2.Qd5#
- 1...c6
- 2.Rxc6#
- 2.Re6#
- 2.Rg6#
- 2.Rh6#
- 1...h6
- 2.Sc6#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rg6#
- 2.Rxh6#
- 1...Qxd8!
- threat
- 1.Qc6?
- Keys
- 1.Qb7!
- threat
- 2.Qb2#
- 1...Qxb7+
- 2.Rc6#
- 1...Kd4
- 2.Rd6#
- 1...Qxd7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rg6#
- 2.Rh6#
- 1...Sxc4
- 2.Qe4#
- 1...Sxd3
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 1...Sb1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sf3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se2
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- threat
- 1.Qb7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- K(f);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD,XP(D)::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(d);N_GUARD::QAR1(B)
- S(d);N_GUARD,XB(C)::QAR1(B)
- S(d);N_GUARD::QAR1(B),XS(d)
- Tries
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- K(f);S_FLIGHT::B(H)+R(E),DCHECK
- S(d);N_GUARD,XB(C)::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- Refutation
- Q(k);XB(H)
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- Q(k);CHECK,N_GUARD::B(H)+R(E)
- K(f);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
- S(a);N_GUARD,XP(D)::QAR1(B)
- S(d);N_GUARD,XB(C)::QAR1(B)
- S(d);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(d);N_GUARD::QAR1(B),XS(d)
- Refutation
- B(j);
- Try
- Q(B);CHECK
- Vars
- K(f);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
- Refutation
- R(g);XQ(B)
- Try
- P(F);XQ(k)
- Threat
- DUALS(6)
- Vars
- K(f);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
- S(d);N_GUARD,XB(C)::QAR1(B)
- S(d);N_GUARD::QAR1(B)
- R(g);::B(H)+R(E),DCHECK
- S(a);N_GUARD::QAR1(B),XS(a)
- S(d);N_GUARD::QAR1(B),XS(d)
- Refutation
- S(d);XQ(B)
- Try
- P(F);XQ(k)
- Threat
- DUALS(6)
- Vars
- K(f);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
- S(d);N_GUARD,XB(C)::QAR1(B)
- S(d);N_GUARD::QAR1(B)
- R(g);::B(H)+R(E),DCHECK
- S(a);N_GUARD::QAR1(B),XS(a)
- S(d);N_GUARD::QAR1(B),XS(d)
- Refutation
- S(d);XQ(B)
- Try
- P(F);
- Threat
- DUALS(7)
- Vars
- K(f);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
- S(d);XQ(B)::S(F)
- Q(k);::B(H)+R(E),DCHECK,XQ(k)
- S(d);N_GUARD::QAR1(B)
- Refutation
- Q(k);XS(F)
- Try
- Actual
- Q(B);
- Threat
- QAB(B)
- Vars
- Q(k);CHECK,N_GUARD,XQ(B)::B(H)+R(E)
- K(f);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
- S(a);N_GUARD,XP(D)::QAR1(B)
- S(d);N_GUARD,XB(C)::QAR1(B)
- S(d);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(d);N_GUARD::QAR1(B),XS(d)
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).