MESON Chess Problem Database
Problem Display
PID: 79412 (n3n3/4Rq2/1NQ5/8/1ppk2r1/1R1P1pp1/2P2PP1/3K2N1 w - - 0 1)
Forster, Klaus
Die Schwalbe, 2008
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Qxd5#
- 1...Qh5
- 2.Sxf3#
- 2.Qxc4#
- 1...Qe6
- 2.Sxf3#
- 1...Qg6
- 2.Sxf3#
- 2.Qd5#
- 2.Qxc4#
- 1...Qg8
- 2.Sxf3#
- 1...Qf4
- 2.Qd5#
- 2.Qxc4#
- 1...Qf5
- 2.Qxc4#
- 1...Qf6
- 2.Qd5#
- 2.Qxc4#
- 1...Qxe7
- 2.Sxf3#
- 2.Qd5#
- 1...Qg7
- 2.Sxf3#
- 2.Qd5#
- 2.Qxc4#
- 1...Qh7
- 2.Sxf3#
- 2.Qd5#
- 2.Qxc4#
- 1...Qf8
- 2.Qd5#
- 2.Qxc4#
- 1...Re4
- 2.Rxe4#
- 1...Rg5
- 2.Re4#
- 1...Rg6
- 2.Re4#
- 1...Rg7
- 2.Re4#
- 1...Rg8
- 2.Re4#
- 1...Sf6
- 2.Sxf3#
- 1...fxg2
- 2.Se2#
- 1...cxd3
- 2.Rxd3#
- 1...Qd5
- Tries
- 1.Sa4?
- threat
- 2.Qc5#
- 1...Qxe7
- 2.Sxf3#
- 1...Qh5
- 2.Sxf3#
- 2.Qxc4#
- 1...Qf5
- 2.Qxc4#
- 1...Rg5
- 2.Re4#
- 2.Qe4#
- 1...Qd5!
- threat
- 1.Sd7?
- threat
- 2.Qc5#
- 1...Qxe7
- 2.Sxf3#
- 2.Qxc4#
- 1...Qh5
- 2.Sxf3#
- 2.Qxc4#
- 1...Qf5
- 2.Qxc4#
- 1...Rg5
- 2.Re4#
- 2.Qe4#
- 1...Qd5!
- threat
- 1.Re5?
- threat
- 2.Qc5#
- 1...Qd5
- 2.Rxd5#
- 2.Qxd5#
- 1...Qc7
- 2.Sxf3#
- 2.Rd5#
- 2.Qd5#
- 1...Qe7
- 2.Sxf3#
- 2.Rd5#
- 2.Qd5#
- 1...Qf8
- 2.Rd5#
- 2.Qd5#
- 1...Kxe5!
- threat
- 1.Re6?
- threat
- 2.Qd5#
- 2.Qxc4#
- 1...Qxe6
- 2.Sxf3#
- 1...cxb3
- 2.Qc4#
- 1...cxd3
- 2.Rxd3#
- 2.Rxb4#
- 2.Qd5#
- 2.Qc4#
- 1...Qh5
- 2.Sxf3#
- 2.Qxc4#
- 1...Qf5
- 2.Qxc4#
- 1...Qb7
- 2.Sxf3#
- 2.Qxc4#
- 1...Qc7
- 2.Sxf3#
- 2.Qd5#
- 1...Qd7
- 2.Sxf3#
- 2.Qxc4#
- 1...Rg5
- 2.Re4#
- 2.Qxc4#
- 1...Sac7
- 2.Qxc4#
- 1...Sd6
- 2.Qd5#
- 2.Qxd6#
- 1...Sf6
- 2.Sxf3#
- 2.Qxc4#
- 1...Sec7
- 2.Qxc4#
- 1...c3
- 2.Rxb4#
- 2.Qd5#
- 2.Qc4#
- 1...Sxb6!
- threat
- 1.Rxf7?
- threat
- 2.Sxf3#
- 2.Qd5#
- 1...Ke5
- 2.Sxf3#
- 2.Qd5#
- 1...Sxb6
- 2.Sxf3#
- 1...fxg2
- 2.Sf3#
- 2.Qd5#
- 1...cxb3
- 2.Sxf3#
- 1...Rf4
- 2.Qd5#
- 1...Rg5
- 2.Sxf3#
- 1...Sac7
- 2.Sxf3#
- 1...Sf6
- 2.Sxf3#
- 1...Sec7
- 2.Sxf3#
- 1...gxf2!
- threat
- 1.Qd7+?
- 1...Kc5
- 2.Sa4#
- 1...Qd5
- 2.Qxd5#
- 1...Sd6!
- 1...Kc5
- 1.Qd6+?
- 1...Qd5
- 2.Sxf3#
- 2.Qxd5#
- 1...Sxd6!
- 1...Qd5
- 1.c3+?
- 1...Kxd3
- 2.Re3#
- 1...bxc3!
- 1...Kxd3
- 1.gxf3?
- threat
- 2.Se2#
- 1...Qxf3+
- 2.Sxf3#
- 1...Qxe7
- 2.Qd5#
- 1...cxd3
- 2.Rxd3#
- 1...Re4
- 2.Rxe4#
- 1...Qe6!
- threat
- 1.dxc4?
- threat
- 2.Rd3#
- 1...Qxc4
- 2.Sxf3#
- 2.Qxc4#
- 1...Qxe7
- 2.Sxf3#
- 2.Qd5#
- 1...Qe6
- 2.Sxf3#
- 1...Qg6
- 2.Sxf3#
- 2.Qd5#
- 1...Qh7
- 2.Sxf3#
- 2.Qd5#
- 1...Qf5!
- threat
- 1.Sa4?
- Keys
- 1.Qb5!
- threat
- 2.Qe5#
- 1...Qxe7
- 2.Sxf3#
- 2.Qd5#
- 1...Qd5
- 2.Qxd5#
- 1...Qh5
- 2.Sxf3#
- 2.Qxc4#
- 1...Qe6
- 2.Sxf3#
- 1...Qf4
- 2.Qxc4#
- 2.Qd5#
- 1...Qf5
- 2.Qxc4#
- 1...Qf6
- 2.Qxc4#
- 2.Qd5#
- 1...Qg7
- 2.Sxf3#
- 2.Qxc4#
- 2.Qd5#
- 1...Re4
- 2.Rxe4#
- 1...Rg5
- 2.Re4#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- Q(g);N_GUARD::QAR1(I),XQ(g)
- Q(g);N_GUARD::S(B),XP(a)
- Q(g);N_GUARD::QAR1(I),XP(d)
- R(f);N_GUARD::R1(J),XR(f)
- R(f);N_GUARD::R1(J)
- S(i);S_CUTQ(g)::S(B),XP(a)
- P(a);N_GUARD,XP(E)::S(B)
- P(d);OGATE,XP(G)::R1(F),XP(d)
- Tries
- Try
- S(H);
- Threat
- QAB1(I)
- Vars
- Q(g);N_GUARD,XR(J)::S(B),XP(a)
- Q(g);N_GUARD::QAR1(I),XP(d)
- Refutation
- Q(g);
- Try
- S(H);
- Threat
- QAB1(I)
- Vars
- Q(g);N_GUARD::QAR1(I),XP(d)
- Refutation
- Q(g);
- Try
- R(J);
- Threat
- QAB1(I)
- Refutation
- K(e);S_FLIGHT,XR(J)
- Try
- R(J);
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,XR(J)::S(B),XP(a)
- P(d);XR(F)::QAR1(I)
- Q(g);::QAR1(I),XP(d)
- S(h);::QAR1(I),XP(d)
- S(i);::QAR1(I),XP(d)
- Refutation
- S(h);XS(H)
- Try
- R(J);XQ(g)
- Threat
- DUALS(2)
- Vars
- S(h);XS(H)::S(B),XP(a)
- P(d);XR(F)::S(B),XP(a)
- R(f);::QAR1(I)
- R(f);::S(B),XP(a)
- S(h);::S(B),XP(a)
- S(i);::S(B),XP(a)
- Refutation
- P(b);XP(D)
- Try
- Q(I);CHECK
- Vars
- K(e);S_FLIGHT::S(H)
- Q(g);N_GUARD,P_SPINQ(g)::QAR1(I),XQ(g)
- Refutation
- S(i);P_SPINS(i)
- Try
- Q(I);CHECK
- Refutation
- S(i);XQ(I)
- Try
- P(C);CHECK
- Vars
- K(e);P-FLIGHT,XP(G)::R1(J)
- Refutation
- P(c);XP(C)
- Try
- P(E);XP(a)
- Threat
- S(B)
- Vars
- Q(g);CHECK,XP(E)::S(B),XQ(g)
- Q(g);N_GUARD,XR(J)::QAR1(I)
- P(d);OGATE,XP(G)::R1(F),XP(d)
- R(f);N_GUARD::R1(J),XR(f)
- Refutation
- Q(g);
- Try
- P(G);XP(d)
- Threat
- R1(F)
- Vars
- Q(g);N_GUARD::S(B),XP(a)
- Refutation
- Q(g);
- Try
- Actual
- Q(I);
- Threat
- QAB1(I)
- Vars
- Q(g);N_GUARD::QAR1(I),XQ(g)
- Q(g);N_GUARD::S(B),XP(a)
- Q(g);N_GUARD::QAR1(I),XP(d)
- R(f);N_GUARD::R1(J),XR(f)
- R(f);N_GUARD::R1(J)
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).