MESON Chess Problem Database
Problem Display
PID: 143106 (8/2N5/2n1R3/p3Np2/2p1krrR/4PpP1/b7/K3Q3 w - - 0 1)
Hannelius, Jan Ingvar
4th Prize, Problemas, 1987
#2
8 + 9
| 422 | Suomen Tehtavaniekat | 1990 |
SOLUTION
- SOUND
- Sets
- 1...Rxg3
- 2.Rxf4#
- 1...Rg5
- 2.Rxf4#
- 1...Rg6
- 2.Rxf4#
- 1...Rg7
- 2.Rxf4#
- 1...Rg8
- 2.Rxf4#
- 1...Rxg3
- Tries
- 1.Sd3+?
- 1...Se5
- 2.Sf2#
- 2.Sc5#
- 1...Kxd3!
- 1...Se5
- 1.Sxg4+?
- 1...Se5
- 2.Sf2#
- 1...Kd3!
- 1...Se5
- 1.Sd7+?
- 1...Se5
- 2.Sc5#
- 1...Kd3!
- 1...Se5
- 1.Rd6?
- threat
- 2.exf4#
- 1...Kxe5
- 2.Re6#
- 1...Sd4
- 2.exd4#
- 1...f2!
- threat
- 1.Qd2?
- threat
- 2.Sxc6#
- 1...Sxe5
- 2.Qd4#
- 1...Rg6
- 2.Rxf4#
- 1...Sb4
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa7
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Se7
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sb8
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sd8
- 2.Qd4#
- 1...c3
- 2.Qd3#
- 1...f2!
- threat
- 1.Qc3?
- threat
- 2.Sxc6#
- 1...Sxe5
- 2.Rxe5#
- 2.Qd4#
- 1...Rg6
- 2.Rxf4#
- 1...Sb4
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa7
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Se7
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sb8
- 2.Sd3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sd8
- 2.Qd4#
- 1...f2!
- threat
- 1.Sd3+?
- Keys
- 1.Qd1!
- threat
- 2.Sxc6#
- 1...Kxe3
- 2.Sxg4#
- 1...Sxe5
- 2.Qd4#
- 1...Rg6
- 2.Qxf3#
- 1...Sb4
- 2.Sd3#
- 2.Sxf3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa7
- 2.Sd3#
- 2.Sxf3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Se7
- 2.Sd3#
- 2.Sxf3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sb8
- 2.Sd3#
- 2.Sxf3#
- 2.Sxc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qd4#
- 1...Sd8
- 2.Qd4#
- 1...c3
- 2.Qd3#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 4
- Sets
- R(f);OGATE,P_SPINR(e),XP(D)::R1(E),XR(e)
- R(f);OGATE,P_SPINR(e)::R1(E),XR(e)
- Tries
- Try
- S(F);CHECK
- Refutation
- K(d);S_FLIGHT,XS(F)
- Try
- S(F);CHECK,XR(f)
- Vars
- S(i);P_SPINS(i)::S(F)
- Refutation
- K(d);S_FLIGHT
- Try
- S(F);CHECK
- Vars
- S(i);P_SPINS(i)::S(F)
- Refutation
- K(d);S_FLIGHT
- Try
- R(G);
- Threat
- QAR(B)+P(C),XR(e)
- Vars
- K(d);OGATEB,P-FLIGHT,XS(F)::R1(G)
- S(i);OGATE::QAR(B)+P(C),XS(i)
- Refutation
- P(b);
- Try
- Q(B);
- Threat
- R(G)+S(F),XS(i)
- Vars
- S(i);N_GUARD,P_SPINS(i),XS(F)::QAR1(B)
- R(f);OGATE,P_SPINR(e)::R1(E),XR(e)
- S(i);N_GUARD::QAR1(B),XS(i)
- S(i);N_GUARD::QAR1(B)
- P(c);N_GUARD::QAB1(B)
- Refutation
- P(b);
- Try
- Q(B);
- Threat
- R(G)+S(F),XS(i)
- Vars
- R(f);OGATE,P_SPINR(e)::R1(E),XR(e)
- S(i);N_GUARD::QAR1(B),XS(i)
- S(i);N_GUARD::QAR1(B)
- Refutation
- P(b);
- Try
- Actual
- Q(B);
- Threat
- R(G)+S(F),XS(i)
- Vars
- K(d);P-FLIGHT,XP(C)::R(G)+S(F),DCHECK,XR(f)
- S(i);N_GUARD,P_SPINS(i),XS(F)::QAR1(B)
- R(f);P_SPINR(e)::QAB1(B),XP(b)
- S(i);N_GUARD::QAR1(B),XS(i)
- S(i);N_GUARD::QAR1(B)
- P(c);N_GUARD::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).