MESON Chess Problem Database
Problem Display
PID: 286006 (2R3K1/P2NP1bp/P1p1n1Rr/3k1N2/2b5/r1Q2P2/2B5/1q6 w - - 0 1)
Jonsson, Gustav
1st Prize, To Mat, 1954
#2
11 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2026 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Be4#
- 1...Qa1
- 2.Be4#
- 1...Qc1
- 2.Be4#
- 1...Qd1
- 2.Be4#
- 1...Qf1
- 2.Be4#
- 1...Qg1
- 2.Be4#
- 1...Qh1
- 2.Be4#
- 1...Qb2
- 2.Be4#
- 1...Qb3
- 2.Be4#
- 1...Qb4
- 2.Be4#
- 1...Qb5
- 2.Be4#
- 1...Qb6
- 2.Be4#
- 1...Qb7
- 2.Be4#
- 1...Qb8
- 2.Be4#
- 1...Bf1
- 2.Qxc6#
- 1...Ba2
- 2.Qxc6#
- 1...Be2
- 2.Qxc6#
- 1...Bb3
- 2.Sb6#
- 2.Qxc6#
- 1...Bd3
- 2.Qxc6#
- 1...Bb5
- 2.Sb6#
- 1...Bxa6
- 2.Qxc6#
- 1...Be5
- 2.Qxe5#
- 1...Bf8
- 2.Qe5#
- 1...Sd4
- 2.Se3#
- 1...Sf4
- 2.Se3#
- 1...Sc5
- 2.Se3#
- 1...Sg5
- 2.Se3#
- 1...Sc7
- 2.Se3#
- 1...Sd8
- 2.Se3#
- 1...Sf8
- 2.Se3#
- 1...Qa2
- Tries
- 1.Bxb1?
- threat
- 2.Be4#
- 1...Bd3
- 2.Sb6#
- 2.Qxc6#
- 1...Sc5
- 2.Se3#
- 2.Sb6#
- 1...Sg5
- 2.Se3#
- 1...Rh4!
- threat
- 1.Qe3?
- threat
- 2.Qe4#
- 2.Qxe6#
- 1...Qxc2
- 2.Sb6#
- 2.Qxe6#
- 1...Rxg6
- 2.Qe4#
- 1...hxg6
- 2.Qe4#
- 1...Bd3
- 2.Qxe6#
- 1...Qe1
- 2.Sb6#
- 2.Be4#
- 1...Rh4
- 2.Qxe6#
- 1...Be5
- 2.Qe4#
- 2.Qxe5#
- 1...Bf6
- 2.Sxf6#
- 2.Qe4#
- 1...Sd4
- 2.Qe4#
- 1...Sf4
- 2.Qc5#
- 2.Qe4#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 2.Qe4#
- 1...Sd8
- 2.Qc5#
- 2.Qe4#
- 1...Sf8
- 2.Qc5#
- 2.Qe4#
- 1...Rxe3!
- threat
- 1.a8Q?
- threat
- 2.Qxc6#
- 1...Qb5
- 2.Be4#
- 1...Qb6
- 2.Be4#
- 1...Qb7
- 2.Be4#
- 1...Bb5
- 2.Sb6#
- 1...Sd4
- 2.Se3#
- 1...Sd8
- 2.Se3#
- 1...Rxa6!
- threat
- 1.a8B?
- threat
- 2.Bxc6#
- 1...Qb5
- 2.Be4#
- 1...Qb6
- 2.Be4#
- 1...Qb7
- 2.Be4#
- 1...Bb5
- 2.Sb6#
- 1...Sd4
- 2.Se3#
- 1...Sd8
- 2.Se3#
- 1...Rxa6!
- threat
- 1.Bxb1?
- Keys
- 1.Qb4!
- threat
- 2.Qd6#
- 1...Qxb4
- 2.Be4#
- 1...Bxa6
- 2.Qe4#
- 1...Bf1
- 2.Qe4#
- 1...Ba2
- 2.Qe4#
- 1...Be2
- 2.Qe4#
- 1...Bb3
- 2.Se3#
- 2.Qe4#
- 1...Bd3
- 2.Se3#
- 1...Bb5
- 2.Qe4#
- 1...Be5
- 2.Sb6#
- 1...Sc5
- 2.Qxc5#
- 1...c5
- 2.a8Q#
- 2.a8B#
- threat
- 1.Qb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 20
- Sets
- Q(a);N_GUARD::B(A)
- Q(a);N_GUARD,P_PINR(J)::B(A)
- B(c);OGATE::QAB1(B),XP(e)
- B(c);S_CUTQ(a)::S(H)
- B(c);OGATE,XP(E)::QAB1(B),XP(e)
- B(h);N_GUARD::QAR1(B),XB(h)
- B(h);N_GUARD::QAR1(B)
- S(f);::S(D)
- Tries
- Try
- B(A);XQ(a)
- Threat
- B(A)
- Vars
- S(f);::S(D)
- Refutation
- R(g);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(g);XR(F)::QAB1(B)
- P(i);XR(F)::QAB1(B)
- B(c);::QAB1(B),XS(f)
- R(g);::QAB1(B),XS(f)
- S(f);::QAB1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(f);N_GUARD::QAR1(B)
- Refutation
- R(b);XQ(B)
- Try
- P(G);P_PINP(e)
- Threat
- QAB1(G),XP(e)
- Vars
- Q(a);N_GUARD::B(A)
- Q(a);N_GUARD,N_SPINP(e)::B(A)
- B(c);S_CUTQ(a)::S(H)
- S(f);::S(D)
- Refutation
- R(b);XP(E)
- Try
- P(G);P_PINP(e)
- Threat
- B(G),XP(e)
- Vars
- Q(a);N_GUARD::B(A)
- Q(a);N_GUARD,N_SPINP(e)::B(A)
- B(c);S_CUTQ(a)::S(H)
- S(f);::S(D)
- Refutation
- R(b);XP(E)
- Try
- Actual
- Q(B);
- Threat
- QAR1(B)
- Vars
- Q(a);N_GUARD,XQ(B)::B(A)
- B(c);OGATE,XP(E)::QAB1(B)
- B(c);OGATE::QAB1(B)
- B(c);S_CUTR(b)::S(D)
- B(h);SBLOCK::S(H)
- S(f);N_GUARD::QAR1(B),XS(f)
- P(e);::P=Q
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).