MESON Chess Problem Database
Problem Display
PID: 214963 (4R3/1qPpN3/3k4/B2P4/1P4N1/1p2RbK1/5Q2/8 w - - 0 1)
Valuska, Jan
Suomen Shakki, 1977
#2
10 + 5
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxd5
- 2.c8S#
- 1...Qb5
- 2.c8S#
- 1...Qa7
- 2.c8S#
- 1...Qb8
- 2.cxb8Q#
- 2.cxb8B#
- 1...Bd1
- 2.Qf4#
- 2.Qf6#
- 1...Bh1
- 2.Qf4#
- 2.Qf6#
- 1...Be2
- 2.Qf4#
- 2.Qf6#
- 1...Bg2
- 2.Qf4#
- 2.Qf6#
- 1...Be4
- 2.Qf4#
- 2.Qf6#
- 1...Bxg4
- 2.Qf4#
- 1...Bxd5
- 2.Qf4#
- 1...Qxd5
- Tries
- 1.Kh2?
- threat
- 2.Qg3#
- 1...Qxd5
- 2.c8S#
- 1...Qxb4!
- threat
- 1.Kh4?
- threat
- 2.Qg3#
- 2.Qh2#
- 1...Qxd5
- 2.c8S#
- 1...Bg2
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 1...Qxb4!
- threat
- 1.Rc3?
- threat
- 2.Qc5#
- 1...Qxd5
- 2.Sc8#
- 1...Qxb4
- 2.Bxb4#
- 2.c8S#
- 1...Qxc7
- 2.Bxc7#
- 1...Bxg4
- 2.Qf4#
- 1...Bxd5
- 2.Sf5#
- 1...Qb5
- 2.c8S#
- 1...Qb6
- 2.Qxb6#
- 2.c8S#
- 1...Qa7
- 2.c8S#
- 1...Qc6!
- threat
- 1.Rxf3?
- threat
- 2.Rf6#
- 2.Qc5#
- 1...Qxb4
- 2.Rf6#
- 2.c8S#
- 1...Qxc7
- 2.Rf6#
- 1...Qb6
- 2.Qxb6#
- 1...Qc6
- 2.Rf6#
- 1...Qb5
- 2.Rf6#
- 2.c8S#
- 1...Qa7
- 2.Rf6#
- 2.c8S#
- 1...Qxd5!
- threat
- 1.Re5?
- threat
- 2.Sf5#
- 2.Qc5#
- 1...Qxd5
- 2.c8S#
- 1...Qxb4
- 2.Sf5#
- 2.Sc8#
- 2.c8S#
- 1...Qxc7
- 2.Sf5#
- 1...Bxd5
- 2.Qc5#
- 1...Qb6
- 2.Qxb6#
- 1...Qc6
- 2.Sf5#
- 2.Sc8#
- 1...Qb5
- 2.Sf5#
- 2.Sc8#
- 2.c8S#
- 1...Qa7
- 2.Sf5#
- 2.Sc8#
- 2.c8S#
- 1...Be4
- 2.Qc5#
- 2.Qf6#
- 1...Bxg4!
- threat
- 1.Rd8?
- threat
- 2.Re6#
- 1...Qxd5
- 2.c8S#
- 1...Bxg4
- 2.Qf4#
- 1...Bxd5
- 2.Qf4#
- 1...Be4
- 2.Qf6#
- 1...Qb6!
- threat
- 1.Qb2?
- threat
- 2.Qe5#
- 2.Qf6#
- 1...Qxd5
- 2.c8S#
- 1...Bxg4
- 2.Qe5#
- 1...Bxd5
- 2.Qe5#
- 1...Qb6
- 2.Qe5#
- 1...Qxb4!
- threat
- 1.Qc2?
- threat
- 2.Qg6#
- 2.Qc5#
- 1...Qxd5
- 2.Sc8#
- 2.c8S#
- 1...Qxb4
- 2.Bxb4#
- 2.c8S#
- 1...Qxc7
- 2.Bxc7#
- 2.Qg6#
- 2.Qxc7#
- 1...Bxg4
- 2.Qc5#
- 1...Bxd5
- 2.Sf5#
- 2.Qc5#
- 1...Qc6
- 2.Qg6#
- 1...Qb5
- 2.Qg6#
- 2.c8S#
- 1...Qb6
- 2.c8S#
- 1...Qa7
- 2.Qg6#
- 2.c8S#
- 1...Be4
- 2.Qc5#
- 1...bxc2!
- threat
- 1.Qh2?
- threat
- 2.Kf2#
- 2.Kxf3#
- 2.Kh3#
- 2.Kh4#
- 2.Qh6#
- 1...Qxd5
- 2.c8S#
- 1...Bxg4
- 2.Kf2#
- 2.Kg2#
- 2.Kxg4#
- 2.Kh4#
- 1...Bxd5
- 2.Kf2#
- 2.Kh3#
- 2.Kh4#
- 1...Qb6
- 2.Kf2#
- 2.Kxf3#
- 2.Kh3#
- 2.Kh4#
- 1...Bd1
- 2.Kf2#
- 2.Kg2#
- 2.Kh3#
- 2.Kh4#
- 2.Qh6#
- 1...Bh1
- 2.Kf2#
- 2.Kh3#
- 2.Kh4#
- 2.Qh6#
- 1...Be2
- 2.Kf2#
- 2.Kg2#
- 2.Kh3#
- 2.Kh4#
- 2.Qh6#
- 1...Bg2
- 2.Kf2#
- 2.Kxg2#
- 2.Kh4#
- 2.Qh6#
- 1...Be4
- 2.Kf2#
- 2.Kh3#
- 2.Kh4#
- 1...Qxb4!
- threat
- 1.Qxf3?
- threat
- 2.Sf5#
- 2.Qf4#
- 2.Qf6#
- 1...Qxd5
- 2.Qxd5#
- 2.c8S#
- 1...Qb6
- 2.Qf4#
- 1...Qxb4!
- threat
- 1.Kh2?
- Keys
- 1.Rd3!
- threat
- 2.Sf5#
- 2.Qc5#
- 1...Qxd5
- 2.Qb6#
- 1...Qxb4
- 2.Sf5#
- 2.Sc8#
- 2.c8S#
- 1...Qxc7
- 2.Sf5#
- 1...Bxg4
- 2.Qf4#
- 1...Bxd5
- 2.Qf6#
- 1...Qb6
- 2.Qxb6#
- 1...Qc6
- 2.Sf5#
- 2.Sc8#
- 1...Qb5
- 2.Sf5#
- 2.Sc8#
- 2.c8S#
- 1...Qa7
- 2.Sf5#
- 2.Sc8#
- 2.c8S#
- 1...Be4
- 2.Qc5#
- 2.Qf4#
- 2.Qf6#
- threat
- 1.Rd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(d);N_GUARD,XP(G)::P=S
- Q(d);N_GUARD::P=S
- Q(d);OGATE::PXQ(d)=Q
- B(b);OGATE,XS(E)::QAB(A)
- B(b);OGATE,XP(G)::QAB(A)
- Tries
- Try
- K(C);S_FLIGHT
- Threat
- QAB(A)
- Vars
- Q(d);N_GUARD,XP(G)::P=S
- Refutation
- Q(d);XP(D)
- Try
- K(C);S_FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(d);N_GUARD,XP(G)::P=S
- Refutation
- Q(d);P_PINS(E),XP(D)
- Try
- R(B);
- Threat
- QAB1(A)
- Vars
- Q(d);N_GUARD,SBLOCK,XP(G)::S(I)
- Q(d);OGATE,XP(H)::B(F),XQ(d)
- B(b);OGATE,XS(E)::QAB(A)
- B(b);SBLOCK,XP(G)::S(I)
- Q(d);N_GUARD::P=S
- Refutation
- Q(d);
- Try
- R(B);XB(b)
- Threat
- DUALS(2)
- Vars
- Q(d);XP(H)::R(B)
- Q(d);N_GUARD::QAR2(A),XQ(d)
- Q(d);::R(B)
- Refutation
- Q(d);XP(G)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- Q(d);N_GUARD,XP(G)::P=S
- Q(d);XP(H)::S(I)
- B(b);XP(G)::QAB1(A)
- Q(d);N_GUARD::QAR2(A),XQ(d)
- Refutation
- B(b);XS(E)
- Try
- R(J);P_PINP(e)
- Threat
- R1(B)
- Vars
- Q(d);N_GUARD,XP(G)::P=S
- B(b);OGATE,XS(E)::QAB(A)
- B(b);OGATE,XP(G)::QAB(A)
- B(b);OGATE::QAR2(A)
- Refutation
- Q(d);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(d);N_GUARD,XP(G)::P=S
- B(b);XS(E)::QAB1(A)
- B(b);XP(G)::QAB1(A)
- Q(d);::QAB1(A)
- Refutation
- Q(d);XP(D)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(b);XS(E)::QAB1(A)
- Q(d);::QAR(A)
- Q(d);N_GUARD::P=S
- B(b);::QAB1(A)
- Refutation
- P(a);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(5)
- Vars
- Q(d);N_GUARD,XP(G)::P=S
- Refutation
- Q(d);XP(D)
- Try
- Q(A);XB(b)
- Threat
- DUALS(3)
- Vars
- Q(d);::QAB(A)
- Refutation
- Q(d);XP(D)
- Try
- Actual
- R(B);
- Threat
- DUALS(2)
- Vars
- Q(d);N_GUARD,P_SPINQ(d),XP(G)::QAR2(A)
- Q(d);XP(H)::S(I)
- B(b);OGATE,XS(E)::QAB(A)
- B(b);OGATE,P_SPINB(b),XP(G)::QAR2(A)
- Q(d);N_GUARD::QAR2(A),XQ(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).