MESON Chess Problem Database
Problem Display
PID: 178783 (4r3/5Np1/n7/4N3/2Ppk1K1/Rq4b1/1QbPB2B/8 w - - 0 1)
Jonsson, Nils Gustav Helmer
1st Prize, Springaren, 1952-10
#2
9 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Bf3#
- 2.Qb7#
- 1...Qa4
- 2.Bf3#
- 1...Qxc4
- 2.Bf3#
- 1...Qxb2
- 2.Bf3#
- 1...Qxa3
- 2.Qb7#
- 1...Qc3
- 2.Qb7#
- 1...Qd3
- 2.Qb7#
- 1...Qe3
- 2.Qb7#
- 1...Qf3+
- 2.Bxf3#
- 1...Qb4
- 2.Bf3#
- 1...Qb5
- 2.Bf3#
- 1...Qb6
- 2.Bf3#
- 1...Qb7
- 2.Bf3#
- 2.Qxb7#
- 1...Qb8
- 2.Bf3#
- 1...Rxe5
- 2.Sd6#
- 1...Bd3
- 2.Bf3#
- 1...Be1
- 2.Sg5#
- 2.Sd6#
- 1...Bf2
- 2.Sg5#
- 2.Sd6#
- 1...Bh4
- 2.Sd6#
- 1...Bxe5
- 2.Sg5#
- 1...d3
- 2.Sg5#
- 2.Sd6#
- 2.Bf3#
- 1...Qa2
- Tries
- 1.Sf3?
- threat
- 2.S3g5#
- 2.S7g5#
- 2.Qxd4#
- 1...Qxf3+
- 2.Bxf3#
- 1...Qxb2
- 2.S3g5#
- 2.S7g5#
- 1...Qc3
- 2.S3g5#
- 2.S7g5#
- 2.Qb7#
- 1...Qd3
- 2.S3g5#
- 2.S7g5#
- 2.Qb7#
- 1...Qe3
- 2.Qb7#
- 1...Qb5
- 2.Qxd4#
- 1...Qb6
- 2.S3g5#
- 2.S7g5#
- 1...Re5
- 2.Sd6#
- 2.Qxd4#
- 1...Rd8
- 2.S3g5#
- 2.S7g5#
- 1...Bf2
- 2.S3g5#
- 2.S7g5#
- 2.Sd6#
- 1...Bf4
- 2.Qxd4#
- 1...Bh4
- 2.Sd6#
- 2.Qxd4#
- 1...Be5
- 2.S3g5#
- 2.S7g5#
- 1...d3
- 2.S3g5#
- 2.S7g5#
- 2.Qd4#
- 1...g5
- 2.S3xg5#
- 2.S7xg5#
- 2.Qxd4#
- 1...Qxc4!
- threat
- 1.Sc6?
- threat
- 2.Sg5#
- 2.Qxd4#
- 1...Qf3+
- 2.Bxf3#
- 1...Qxc4
- 2.Bf3#
- 1...Qxb2
- 2.Sg5#
- 2.Bf3#
- 1...Qc3
- 2.Sg5#
- 1...Qd3
- 2.Sg5#
- 1...Qb5
- 2.Bf3#
- 2.Qxd4#
- 1...Qb6
- 2.Sg5#
- 2.Bf3#
- 1...Re5
- 2.Sd6#
- 2.Qxd4#
- 1...Rd8
- 2.Sg5#
- 1...Bf2
- 2.Sg5#
- 2.Sd6#
- 1...Bf4
- 2.Qxd4#
- 1...Bh4
- 2.Sd6#
- 2.Qxd4#
- 1...Be5
- 2.Sg5#
- 1...d3
- 2.Sg5#
- 2.Bf3#
- 2.Qd4#
- 1...g5
- 2.Sxg5#
- 2.Qxd4#
- 1...Qe3!
- threat
- 1.Sg6?
- threat
- 2.Sg5#
- 1...Qf3+
- 2.Bxf3#
- 1...Qxc4
- 2.Bf3#
- 1...Qe3
- 2.Qb7#
- 1...Qb5
- 2.Bf3#
- 1...Re5
- 2.Sd6#
- 1...Bh4
- 2.Sd6#
- 1...Bf4!
- threat
- 1.Sd7?
- threat
- 2.Sg5#
- 1...Qf3+
- 2.Bxf3#
- 1...Qxc4
- 2.Bf3#
- 1...Qe3
- 2.Qb7#
- 1...Qb5
- 2.Bf3#
- 1...Re5
- 2.Sd6#
- 1...Bh4
- 2.Sd6#
- 1...g5
- 2.Sf6#
- 2.Sxg5#
- 1...Bf4!
- threat
- 1.Bd3+?
- 1...Qxd3
- 2.Qb7#
- 1...Bxd3!
- 1...Qxd3
- 1.Bxg3?
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Qf3+
- 2.Bxf3#
- 1...Qxc4
- 2.Bf3#
- 1...Qxa3
- 2.Sg5#
- 2.Qb7#
- 1...Rxe5
- 2.Sd6#
- 1...Qe3
- 2.Sd6#
- 2.Qb7#
- 1...Qb4
- 2.Sg5#
- 2.Bf3#
- 1...Qb6
- 2.Sg5#
- 2.Bf3#
- 1...Qb8
- 2.Sg5#
- 2.Bf3#
- 1...Re6
- 2.Sg5#
- 1...Rd8
- 2.Sg5#
- 1...g5
- 2.Sxg5#
- 2.Sd6#
- 1...Qxg3+!
- threat
- 1.Ra5?
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Qf3+
- 2.Bxf3#
- 1...Rxe5
- 2.Sd6#
- 1...Bxe5
- 2.Sg5#
- 1...Bf4
- 2.Sd6#
- 1...Qa3
- 2.Sg5#
- 2.Qb7#
- 1...Qe3
- 2.Sd6#
- 2.Qb7#
- 1...Qb4
- 2.Sg5#
- 2.Bf3#
- 1...Qb5
- 2.Bf3#
- 1...Qb6
- 2.Sg5#
- 2.Bf3#
- 1...Qb8
- 2.Sg5#
- 2.Bf3#
- 1...Re6
- 2.Sg5#
- 1...Rd8
- 2.Sg5#
- 1...Bh4
- 2.Sd6#
- 1...g5
- 2.Sxg5#
- 2.Sd6#
- 1...Sc5!
- threat
- 1.Qxc2+?
- 1...Qxc2
- 2.Bf3#
- 1...Qd3
- 2.Bxd3#
- 2.Bf3#
- 2.Qxd3#
- 1...d3!
- 1...Qxc2
- 1.Qxb3?
- threat
- 2.Bf3#
- 2.Qf3#
- 2.Qb7#
- 1...Rxe5
- 2.Sd6#
- 2.Bf3#
- 2.Qf3#
- 1...Bxb3
- 2.Bd3#
- 2.Bf3#
- 1...Re6
- 2.Bf3#
- 2.Qf3#
- 1...Re7
- 2.Bf3#
- 2.Qf3#
- 1...Rb8
- 2.Bf3#
- 2.Qf3#
- 1...Rc8
- 2.Bf3#
- 2.Qf3#
- 1...Rd8
- 2.Bf3#
- 2.Qf3#
- 1...Bd1
- 2.Qd3#
- 2.Qf3#
- 2.Qb7#
- 1...Bd3
- 2.Bxd3#
- 2.Bf3#
- 2.Qxd3#
- 2.Qb7#
- 1...Sb4
- 2.Bf3#
- 2.Qf3#
- 1...Sc5
- 2.Bf3#
- 2.Qf3#
- 1...Sc7
- 2.Bf3#
- 2.Qf3#
- 1...Sb8
- 2.Bf3#
- 2.Qf3#
- 1...d3!
- threat
- 1.Sf3?
- Keys
- 1.Sd3!
- threat
- 2.Sg5#
- 1...Qxc4
- 2.Bf3#
- 1...Qxd3
- 2.Qb7#
- 1...Bxd3
- 2.Bf3#
- 1...Qb5
- 2.Bf3#
- 1...Re5
- 2.Sd6#
- 1...Bf4
- 2.Sf2#
- 1...Bh4
- 2.Sd6#
- 1...g5
- 2.Sxg5#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 10
- Sets
- Q(b);N_GUARD::B(C)
- Q(b);N_GUARD,XP(F)::B(C)
- Q(b);N_GUARD,XQ(A)::B(C)
- Q(b);OGATE,XR(E)::QAB(A)
- Q(b);OGATE::QAB(A)
- Q(b);CHECK,N_GUARD::B(C),XQ(b)
- R(h);SBLOCK,XS(H)::S(I)
- B(a);S_CUTQ(b)::B(C)
- B(c);::S(I)
- B(c);XS(H)::S(I)
- Tries
- Try
- S(H);
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,OGATE,XS(H)::B(C),XQ(b)
- Q(b);OGATE::QAB(A)
- Q(b);::QAR1(A),XP(d)
- B(c);::QAR1(A),XP(d)
- Refutation
- Q(b);XP(F)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_GUARD::B(C),XQ(b)
- Q(b);N_GUARD,XP(F)::B(C)
- Q(b);::S(I)
- R(h);::S(I)
- B(c);::QAR1(A),XP(d)
- B(c);::S(I)
- Refutation
- Q(b);
- Try
- S(H);
- Threat
- S(I)
- Vars
- Q(b);CHECK,N_GUARD::B(C),XQ(b)
- Q(b);N_GUARD,XP(F)::B(C)
- Q(b);OGATE::QAB(A)
- Q(b);N_GUARD::B(C)
- R(h);S_CUTB(c)::S(I)
- B(c);N_GUARD::S(I)
- Refutation
- B(c);
- Try
- S(H);
- Threat
- S(I)
- Vars
- Q(b);CHECK,N_GUARD::B(C),XQ(b)
- Q(b);N_GUARD,XP(F)::B(C)
- Q(b);OGATE::QAB(A)
- Q(b);N_GUARD::B(C)
- R(h);S_CUTB(c)::S(I)
- B(c);N_GUARD::S(I)
- Refutation
- B(c);
- Try
- B(C);CHECK
- Vars
- Q(b);OGATE,XB(C)::QAB(A)
- Refutation
- B(a);XB(C)
- Try
- B(D);XB(c)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_GUARD::B(C),XQ(b)
- Q(b);N_GUARD,XP(F)::B(C)
- R(h);XS(H)::S(I)
- R(h);::S(I)
- Refutation
- Q(b);CHECK,XB(D)
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_GUARD::B(C),XQ(b)
- R(h);XS(H)::S(I)
- B(c);XS(H)::S(I)
- B(c);::S(I)
- Q(b);N_GUARD::B(C)
- R(h);::S(I)
- Refutation
- S(f);
- Try
- Q(A);CHECK,XB(a)
- Vars
- Q(b);XQ(A)::B(C)
- Refutation
- P(d);P_SPINP(d)
- Try
- Q(A);XQ(b)
- Threat
- DUALS(3)
- Refutation
- P(d);
- Try
- Actual
- S(H);
- Threat
- S(I)
- Vars
- Q(b);XP(F)::B(C)
- Q(b);OGATE,XS(H)::QAB(A)
- B(a);SBLOCK,XS(H)::B(C)
- Q(b);::B(C)
- R(h);S_CUTB(c)::S(I)
- B(c);N_GUARD::S(H)
- B(c);N_GUARD::S(I)
- P(g);::S(I),XP(g)
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).