MESON Chess Problem Database
Problem Display
PID: 89857 (4Nn2/8/2pr3B/3p3R/3Nk3/b4pp1/2K5/2nQ4 w - - 0 1)
Jonsson, Gustav
Die Schwalbe, 1952
#2
6 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rf6
- 2.Sxf6#
- 1...Rd7
- 2.Sf6#
- 1...Rd8
- 2.Sf6#
- 1...Bb2
- 2.Sxd6#
- 1...Sa2
- 2.Qd3#
- 1...Se2
- 2.Qd3#
- 1...Sb3
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Se6
- 2.Sf6#
- 1...f2
- 2.Qg4#
- 1...c5
- 2.Sxd6#
- 1...Rf6
- Tries
- 1.Se2?
- threat
- 2.Sc3#
- 2.Sxg3#
- 2.Qd4#
- 1...Rxh6
- 2.Qd4#
- 1...Sxe2
- 2.Qd3#
- 1...f2
- 2.Sc3#
- 2.Sxg3#
- 1...Rg6
- 2.Sc3#
- 2.Qd4#
- 1...Bb2
- 2.Sxg3#
- 2.Sxd6#
- 1...Bb4
- 2.Sxg3#
- 2.Qd4#
- 1...Bc5
- 2.Sc3#
- 2.Sxg3#
- 1...Sa2
- 2.Sxg3#
- 2.Qd3#
- 2.Qd4#
- 1...Sb3
- 2.Sc3#
- 2.Sxg3#
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Se6
- 2.Sc3#
- 2.Sxg3#
- 2.Sf6#
- 1...g2
- 2.Sc3#
- 2.Sg3#
- 2.Qd4#
- 1...d4
- 2.Sxg3#
- 1...c5
- 2.Sc3#
- 2.Sxg3#
- 2.Sxd6#
- 1...fxe2!
- threat
- 1.Sxc6?
- threat
- 2.Re5#
- 2.Qd4#
- 1...Rxh6
- 2.Qd4#
- 1...Re6
- 2.Qd4#
- 2.Qxd5#
- 1...Bb2
- 2.Sxd6#
- 1...Bc5
- 2.Re5#
- 1...Se2
- 2.Re5#
- 2.Qd3#
- 1...Sb3
- 2.Re5#
- 2.Qe1#
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Se6
- 2.Sf6#
- 2.Re5#
- 1...Sg6
- 2.Qd4#
- 1...Sd7
- 2.Qd4#
- 1...f2
- 2.Re5#
- 2.Qg4#
- 1...d4
- 2.Re5#
- 1...Rxc6+!
- threat
- 1.Se6?
- threat
- 2.Sf6#
- 2.Qd4#
- 1...Sxe6
- 2.Sf6#
- 1...Bb2
- 2.Sc5#
- 2.Sxd6#
- 1...Bc5
- 2.Sxc5#
- 2.Sf6#
- 1...Se2
- 2.Sf6#
- 2.Qd3#
- 1...Sb3
- 2.Sf6#
- 2.Qe1#
- 2.Qd3#
- 1...Sd3
- 2.Sf6#
- 2.Qxd3#
- 1...Sd7
- 2.Qd4#
- 1...Sh7
- 2.Qd4#
- 1...f2
- 2.Sf6#
- 2.Qg4#
- 1...d4
- 2.Sf6#
- 1...c5
- 2.Sxd6#
- 2.Sf6#
- 1...Rxe6!
- threat
- 1.Qd2?
- threat
- 2.Qe3#
- 2.Qf4#
- 1...Sd3
- 2.Qe3#
- 2.Qxd3#
- 1...Rf6
- 2.Sxf6#
- 2.Qe3#
- 1...Se2
- 2.Qe3#
- 2.Qd3#
- 1...Se6
- 2.Sf6#
- 2.Qe3#
- 1...Sg6
- 2.Qe3#
- 1...Rxh6!
- threat
- 1.Se2?
- Keys
- 1.Sb3!
- threat
- 2.Qd4#
- 1...Sxb3
- 2.Qd3#
- 1...Bb2
- 2.Sc5#
- 2.Sxd6#
- 1...Bc5
- 2.Sxc5#
- 1...Se2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Se6
- 2.Sf6#
- 1...f2
- 2.Qg4#
- 1...d4
- 2.Sd2#
- 1...c5
- 2.Sxd6#
- threat
- 1.Sb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- R(h);N_GUARD::S(F),XR(h)
- R(h);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XR(h)
- S(a);N_GUARD::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(i);S_CUTR(h)::S(F)
- P(c);OGATE::QAR2(A)
- P(g);S_CUTB(b)::S(F),XR(h)
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- R(h);XB(E)::QAR1(A)
- S(a);N_GUARD,XS(C)::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- P(f);::S(C),XP(d)
- Refutation
- P(c);XS(C)
- Try
- S(C);XP(g)
- Threat
- DUALS(2)
- Vars
- R(h);XB(E)::QAR1(A)
- B(b);N_GUARD::S(F),XR(h)
- B(b);::R1(D)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(i);::QAR1(A)
- P(f);::R1(D)
- Refutation
- R(h);CHECK,XS(C)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- S(i);XS(C)::S(F)
- S(i);::QAR1(A)
- P(f);::S(F)
- Refutation
- R(h);XS(C)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(i);::QAR1(A)
- Refutation
- R(h);XB(E)
- Try
- Actual
- S(C);
- Threat
- QAR1(A)
- Vars
- S(a);N_GUARD,XS(C)::QAB1(A)
- B(b);N_GUARD::S(C),XB(b)
- S(a);N_GUARD::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(i);S_CUTR(h)::S(F)
- P(c);OGATE::QAR2(A)
- P(f);SBLOCK::S(C)
- P(g);S_CUTB(b)::S(F),XR(h)
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).