MESON Chess Problem Database
Problem Display
PID: 97022 (2b5/Rp1kp1Pp/R2N1Prp/B1p4B/K1Q5/8/8/8 w - - 0 1)
Jonsson, Gustav
Problemnoter, 1958
#2
9 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Be8#
- 1...Rg2
- 2.Be8#
- 1...Rg3
- 2.Be8#
- 1...Rg4
- 2.Be8#
- 1...Rg5
- 2.Be8#
- 1...Rxf6
- 2.Be8#
- 1...Rxg7
- 2.Be8#
- 1...exd6
- 2.Qf7#
- 1...exf6
- 2.Qf7#
- 1...e5
- 2.Qf7#
- 1...e6
- 2.Qb5#
- 1...Rg1
- Tries
- 1.Ka3?
- 1...Rxf6
- 2.Be8#
- 1...Rxg7
- 2.Be8#
- 1...exd6
- 2.Qf7#
- 1...exf6
- 2.Qf7#
- 1...Rg1
- 2.Be8#
- 1...Rg2
- 2.Be8#
- 1...Rg4
- 2.Be8#
- 1...Rg5
- 2.Be8#
- 1...e5
- 2.Qf7#
- 1...e6
- 2.Qb5#
- 2.Qa4#
- 1...Rg3+!
- 1...Rxf6
- 1.Kb3?
- 1...Rxf6
- 2.Be8#
- 1...Rxg7
- 2.Be8#
- 1...exd6
- 2.Qf7#
- 1...exf6
- 2.Qf7#
- 1...Rg1
- 2.Be8#
- 1...Rg2
- 2.Be8#
- 1...Rg4
- 2.Be8#
- 1...Rg5
- 2.Be8#
- 1...e5
- 2.Qf7#
- 1...e6
- 2.Qb5#
- 2.Qa4#
- 1...Rg3+!
- 1...Rxf6
- 1.Kb5?
- 1...Rxf6
- 2.Be8#
- 1...Rxg7
- 2.Be8#
- 1...exd6
- 2.Qf7#
- 1...exf6
- 2.Qf7#
- 1...Rg1
- 2.Be8#
- 1...Rg2
- 2.Be8#
- 1...Rg3
- 2.Be8#
- 1...Rg4
- 2.Be8#
- 1...Rg5
- 2.Be8#
- 1...e5
- 2.Qf7#
- 1...e6!
- 1...Rxf6
- 1.Se4?
- threat
- 2.Qb5#
- 1...Rxf6
- 2.Sxc5#
- 1...exf6
- 2.Qe6#
- 2.Qf7#
- 1...Ke8!
- threat
- 1.Sf7?
- threat
- 2.Qb5#
- 1...Rxf6
- 2.Se5#
- 1...exf6
- 2.Qe6#
- 1...Rg4
- 2.Se5#
- 1...Ke8!
- threat
- 1.Bg4+?
- 1...e6
- 2.Bxe6#
- 2.Qb5#
- 2.Qxe6#
- 1...Rxg4!
- 1...e6
- 1.Bxg6?
- threat
- 2.Be8#
- 1...exd6
- 2.Qf7#
- 2.Qg4#
- 1...exf6
- 2.Qf7#
- 1...hxg6!
- threat
- 1.Qd5?
- 1...Rg4+
- 2.Sc4#
- 2.Se4#
- 1...Rxf6
- 2.Be8#
- 1...Rxg7
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sxb7#
- 2.Se8#
- 2.Be8#
- 1...exd6
- 2.Qf7#
- 1...exf6
- 2.Qf7#
- 1...Rg1
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sxb7#
- 2.Se8#
- 2.Be8#
- 1...Rg2
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sxb7#
- 2.Se8#
- 2.Be8#
- 1...Rg3
- 2.Sc4#
- 2.Se4#
- 2.Sb5#
- 2.Sf5#
- 2.Sxb7#
- 2.Se8#
- 2.Be8#
- 1...Rg5
- 2.Sf5#
- 2.Be8#
- 1...e5
- 2.Qf7#
- 1...e6
- 2.Qc6#
- 1...c4!
- 1...Rg4+
- 1.Qg8?
- threat
- 2.Qxc8#
- 1...exd6
- 2.Qf7#
- 1...exf6
- 2.Qf7#
- 2.Qe8#
- 1...Rg4+!
- threat
- 1.fxe7?
- threat
- 2.e8Q#
- 1...Kxe7
- 2.Qf7#
- 1...Re6!
- threat
- 1.g8Q?
- threat
- 2.Qb5#
- 2.Qce6#
- 2.Qge6#
- 2.Qxc8#
- 2.Qd8#
- 2.Qe8#
- 1...Rxf6
- 2.Be8#
- 2.Qb5#
- 2.Qxc8#
- 2.Qd8#
- 2.Qe8#
- 1...exd6
- 2.Qb5#
- 2.Qce6#
- 2.Qcf7#
- 2.Qge6#
- 2.Qgf7#
- 2.Qd8#
- 1...exf6
- 2.Qce6#
- 2.Qcf7#
- 2.Qge6#
- 2.Qgf7#
- 2.Qd8#
- 2.Qe8#
- 1...e6
- 2.Qb5#
- 2.Qcxe6#
- 2.Qgxe6#
- 2.Qf7#
- 2.Qxc8#
- 2.Qd8#
- 2.Qe8#
- 1...Rg4
- 2.Be8#
- 2.Qe6#
- 2.Qxc8#
- 2.Qd8#
- 2.Qe8#
- 1...Rxg8!
- threat
- 1.g8S?
- 1...Rxf6
- 2.Be8#
- 1...exd6
- 2.Qf7#
- 1...exf6
- 2.Qf7#
- 1...e6
- 2.Qb5#
- 1...Rg1
- 2.Be8#
- 1...Rg2
- 2.Be8#
- 1...Rg3
- 2.Be8#
- 1...Rg4
- 2.Be8#
- 1...Rg5
- 2.Be8#
- 1...Rg7
- 2.Be8#
- 1...e5
- 2.Qf7#
- 1...Rxg8!
- 1...Rxf6
- 1.g8B?
- threat
- 2.Be6#
- 2.Qb5#
- 2.Qe6#
- 1...Rxf6
- 2.Be8#
- 2.Qb5#
- 1...exd6
- 2.Qb5#
- 2.Qe6#
- 2.Qf7#
- 1...exf6
- 2.Qe6#
- 2.Qf7#
- 1...e6
- 2.Bxe6#
- 2.Qb5#
- 2.Qxe6#
- 1...Rg4
- 2.Be8#
- 2.Be6#
- 1...Rxg8!
- threat
- 1.g8R?
- threat
- 2.Rd8#
- 1...exf6
- 2.Qf7#
- 1...Rxg8!
- threat
- 1.Ka3?
- Keys
- 1.Qe4!
- threat
- 2.Qxe7#
- 1...Rxf6
- 2.Be8#
- 1...Rxg7
- 2.Be8#
- 1...exd6
- 2.Qe7#
- 1...exf6
- 2.Qe8#
- 1...e5
- 2.Qf5#
- 1...Rg4
- 2.Be8#
- 1...e6
- 2.Qc6#
- threat
- 1.Qe4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- R(b);OGATE::B(D)
- R(b);OGATE,P_PINQ(B)::B(D)
- R(b);OGATE,XP(G)::B(D)
- R(b);OGATE,XP(I)::B(D)
- P(f);OGATEB,XS(F)::QAR2(B)
- P(f);OGATEB,XP(G)::QAR2(B)
- P(f);OGATEB::QAR2(B)
- P(f);SBLOCK::QAB(B)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(b);OGATE,XP(G)::B(D)
- R(b);OGATE,XP(I)::B(D)
- P(f);OGATEB,XS(F)::QAR2(B)
- P(f);OGATEB,XP(G)::QAR2(B)
- R(b);OGATE::B(D)
- P(f);OGATEB::QAR2(B)
- Refutation
- R(b);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- R(b);OGATE,XP(G)::B(D)
- R(b);OGATE,XP(I)::B(D)
- P(f);OGATEB,XS(F)::QAR2(B)
- P(f);OGATEB,XP(G)::QAR2(B)
- R(b);OGATE::B(D)
- P(f);OGATEB::QAR2(B)
- Refutation
- R(b);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- R(b);OGATE,XP(G)::B(D)
- R(b);OGATE,XP(I)::B(D)
- P(f);OGATEB,XS(F)::QAR2(B)
- P(f);OGATEB,XP(G)::QAR2(B)
- R(b);OGATE::B(D)
- P(f);OGATEB::QAR2(B)
- Refutation
- P(f);
- Try
- S(F);
- Threat
- QAB(B)
- Vars
- R(b);XP(G)::S(F),XP(a)
- Refutation
- K(e);N_SPINP(d),P_SPINR(b),S_FLIGHT
- Try
- S(F);
- Threat
- QAB(B)
- Vars
- R(b);XP(G)::S(F)
- P(f);XP(G)::QAB1(B)
- R(b);P_PINQ(B)::S(F)
- Refutation
- K(e);N_SPINP(d),S_FLIGHT
- Try
- B(D);CHECK
- Refutation
- R(b);P_PINQ(B),XB(D)
- Try
- B(D);XR(b)
- Threat
- B(D)
- Vars
- P(f);OGATEB,XP(G)::QAR2(B)
- Refutation
- P(g);XB(D)
- Try
- Q(B);
- Vars
- R(b);OGATE,XP(G)::B(D)
- P(f);N_SPINP(d),OGATEB,P_SPINP(f),XS(F)::QAR2(B)
- P(f);OGATEB,XP(G)::QAR2(B)
- P(f);OGATEB::QAR2(B)
- P(f);SBLOCK::QAB1(B)
- Refutation
- P(a);
- Try
- Q(B);
- Threat
- QAB1(B),XB(h)
- Vars
- P(f);OGATEB,XS(F)::QAR2(B)
- Refutation
- R(b);CHECK
- Try
- P(G);XP(f)
- Threat
- P=Q
- Vars
- K(e);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
- Refutation
- R(b);
- Try
- P(I);
- Threat
- DUALS(6)
- Refutation
- R(b);XQ(I)
- Try
- P(I);
- Vars
- R(b);OGATE,XP(G)::B(D)
- P(f);OGATEB,XS(F)::QAR2(B)
- P(f);OGATEB,XP(G)::QAR2(B)
- P(f);SBLOCK::QAB(B)
- R(b);OGATE::B(D)
- R(b);OGATE,P_PINQ(B)::B(D)
- P(f);OGATEB::QAR2(B)
- Refutation
- R(b);XS(I)
- Try
- P(I);
- Threat
- DUALS(3)
- Refutation
- R(b);XB(I)
- Try
- P(I);
- Threat
- R1(I)
- Vars
- P(f);OGATEB,XP(G)::QAR2(B)
- Refutation
- R(b);XR(I)
- Try
- Actual
- Q(B);
- Threat
- QAR1(B),XP(f)
- Vars
- R(b);OGATE,XP(G)::B(D)
- R(b);OGATE,XP(I)::B(D)
- P(f);XS(F)::QAR1(B)
- P(f);OGATE,XP(G)::QAB1(B)
- P(f);N_GUARD::QAB(B)
- R(b);OGATE,P_PINQ(B)::B(D)
- P(f);SBLOCK::QAB1(B)
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).