MESON Chess Problem Database
Problem Display
PID: 246364 (8/8/1NpBk1P1/Kn1pPp1n/R7/Q7/P3N2p/7B w - - 0 1)
Froberg, Johan Hilding Laurentius
Sjakk-Nytt, 1946
#2
10 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sxa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sxd6
- 2.Qxd6#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...f4
- 2.Qh3#
- 1...c5
- 2.Bxd5#
- 1...Sxa3
- Tries
- 1.Ka6?
- 1...Sxa3
- 2.Sd4#
- 1...Sxd6
- 2.Qxd6#
- 1...f4
- 2.Qh3#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5
- 2.Bxd5#
- 1...Sc7+!
- 1...Sxa3
- 1.Sd7?
- threat
- 2.Sc5#
- 2.Sf8#
- 1...Sxd6
- 2.Qxd6#
- 1...f4
- 2.Qh3#
- 1...c5
- 2.Sxc5#
- 2.Sf8#
- 1...Kxd7!
- threat
- 1.Rb4?
- 1...Sxa3
- 2.Sd4#
- 1...f4
- 2.Qh3#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5
- 2.Bxd5#
- 1...Sxd6!
- 1...Sxa3
- 1.Re4?
- 1...Sxa3
- 2.Sd4#
- 1...Sxd6
- 2.Qxd6#
- 1...dxe4
- 2.Qb3#
- 1...fxe4
- 2.Qh3#
- 1...f4
- 2.Qh3#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5!
- 1...Sxa3
- 1.Qb4?
- 1...Sxd6
- 2.Qxd6#
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 2.Qc4#
- 1...c5
- 2.Bxd5#
- 1...f4!
- 1...Sxd6
- 1.Qc5?
- 1...Sxd6
- 2.Qxd6#
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qc4#
- 1...f4!
- 1...Sxd6
- 1.Qb3?
- 1...f4
- 2.Qh3#
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...c5
- 2.Bxd5#
- 2.Qxd5#
- 1...Sxd6!
- 1...f4
- 1.Qc3?
- 1...Sxc3
- 2.Sd4#
- 1...f4
- 2.Qh3#
- 1...Sa3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 2.Qc4#
- 1...c5
- 2.Bxd5#
- 1...Sxd6!
- 1...Sxc3
- 1.Qd3?
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qc4#
- 2.Qb3#
- 1...f4
- 2.Qh3#
- 1...c5
- 2.Bxd5#
- 2.Qxd5#
- 1...Sxd6!
- 1...Sa3
- 1.Qe3?
- 1...f4
- 2.Qh3#
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5
- 2.Bxd5#
- 1...Sxd6!
- 1...f4
- 1.Qf3?
- 1...f4
- 2.Qg4#
- 2.Qh3#
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5
- 2.Qxd5#
- 1...Sxd6!
- 1...f4
- 1.Qg3?
- 1...Sxg3
- 2.Sf4#
- 1...f4
- 2.Qh3#
- 2.Qg4#
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5
- 2.Bxd5#
- 1...Sxd6!
- 1...Sxg3
- 1.Qh3?
- 1...Sa3
- 2.Sd4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5
- 2.Bxd5#
- 1...Sxd6!
- 1...Sa3
- 1.Ka6?
- Keys
- 1.Rh4!
- 1...Sxa3
- 2.Sd4#
- 1...Sxd6
- 2.Qxd6#
- 1...f4
- 2.Qh3#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc7
- 2.Sd4#
- 1...Sg3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sf6
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...d4
- 2.Qb3#
- 1...c5
- 2.Bxd5#
- 1...Sxa3
- 1.Rh4!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD,XQ(D)::S(C)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(b);OGATE,XB(I)::QAR1(D),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- P(d);OGATEB::QAB(D)
- P(f);N_GUARD::B(A),XP(c)
- Tries
- Try
- K(F);P-FLIGHT
- Vars
- S(b);N_GUARD,XQ(D)::S(C)
- S(b);OGATE,XB(I)::QAR1(D),XS(b)
- P(d);OGATEB::QAB(D)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- P(f);N_GUARD::B(A),XP(c)
- Refutation
- S(b);CHECK
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- S(b);OGATE,XB(I)::QAR1(D),XS(b)
- P(d);OGATEB::QAB(D)
- Refutation
- K(g);S_FLIGHT,XS(H)
- Try
- R(E);
- Vars
- S(b);N_GUARD,XQ(D)::S(C)
- P(d);OGATEB::QAB(D)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- P(f);N_GUARD::B(A),XP(c)
- Refutation
- S(b);XB(I)
- Try
- R(E);
- Vars
- S(b);N_GUARD,XQ(D)::S(C)
- S(b);OGATE,XB(I)::QAR1(D),XS(b)
- P(c);OGATEB,XR(E)::QAB(D)
- P(d);OGATEB,XR(E)::QAB(D)
- P(d);OGATEB::QAB(D)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- Refutation
- P(f);
- Try
- Q(D);
- Vars
- S(b);OGATE,XB(I)::QAR1(D),XS(b)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(f);N_GUARD::B(A),XP(c)
- Refutation
- P(d);
- Try
- Q(D);
- Vars
- S(b);OGATE,XB(I)::QAR1(D),XS(b)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- Refutation
- P(d);
- Try
- Q(D);P_PINP(c)
- Vars
- P(d);OGATEB::QAB(D)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- Refutation
- S(b);XB(I)
- Try
- Q(D);
- Vars
- S(b);N_GUARD,XQ(D)::S(C)
- P(d);OGATEB::QAB(D)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(f);N_GUARD::B(A),XP(c)
- Refutation
- S(b);XB(I)
- Try
- Q(D);
- Vars
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(d);OGATEB::QAB(D)
- Refutation
- S(b);XB(I)
- Try
- Q(D);
- Vars
- P(d);OGATEB::QAB(D)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- P(f);N_GUARD::B(A),XP(c)
- Refutation
- S(b);XB(I)
- Try
- Q(D);
- Vars
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- P(f);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(b);XB(I)
- Try
- Q(D);
- Vars
- S(e);N_GUARD,XQ(D)::S(C)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C),XS(e)
- S(e);N_GUARD::S(C)
- P(c);OGATEB::QAB(D)
- P(f);N_GUARD::B(A),XP(c)
- Refutation
- S(b);XB(I)
- Try
- Q(D);P_PINP(d)
- Vars
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- P(f);N_GUARD::B(A),XP(c)
- Refutation
- S(b);XB(I)
- Try
- Actual
- R(E);
- Vars
- S(b);N_GUARD,XQ(D)::S(C)
- S(b);OGATE,XB(I)::QAR1(D),XS(b)
- P(d);OGATEB::QAB(D)
- S(b);N_GUARD::S(C)
- S(b);N_GUARD::S(C),XS(b)
- S(e);N_GUARD::S(C)
- S(e);N_GUARD::S(C),XS(e)
- P(c);OGATEB::QAB(D)
- P(f);N_GUARD::B(A),XP(c)
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).