MESON Chess Problem Database
Problem Display
PID: 7822 (1r2RbB1/3Qp3/1pp2RN1/P1p3p1/2p1k3/KbBNrpn1/4p3/2n2q2 w - - 0 1)
Zappas, Byron
diagrammes, 1993
#2
9 + 16
SOLUTION
- SOUND
- Sets
- 1...Qh3
- 2.Sf2#
- 1...Qd1
- 2.Sf2#
- 1...Qh1
- 2.Sf2#
- 1...Qf2
- 2.Sxf2#
- 1...Rxd3
- 2.Qe6#
- 1...Bh6
- 2.Rxe7#
- 1...Bg7
- 2.Rxe7#
- 1...Sxd3
- 2.Qxc6#
- 1...Sh1
- 2.Qf5#
- 1...Sf5
- 2.Re6#
- 2.Qxf5#
- 1...Sh5
- 2.Qf5#
- 1...cxd3
- 2.Qg4#
- 1...g4
- 2.Rf4#
- 1...bxa5
- 2.Sxc5#
- 1...b5
- 2.Sxc5#
- 1...e5
- 2.Rxe5#
- 1...e6
- 2.Rexe6#
- 1...Qh3
- Tries
- 1.Sb2?
- threat
- 2.Qg4#
- 2.Qxc6#
- 2.Qe6#
- 1...Rd3
- 2.Qe6#
- 1...Qh3
- 2.Qxc6#
- 1...Qd1
- 2.Qg4#
- 2.Qe6#
- 1...Rc8
- 2.Qg4#
- 2.Qe6#
- 1...Rd8
- 2.Qg4#
- 2.Qe6#
- 1...Ba4
- 2.Qg4#
- 2.Qe6#
- 1...Sd3
- 2.Qxc6#
- 1...Sf5
- 2.Re6#
- 2.Qxf5#
- 2.Qxc6#
- 2.Qe6#
- 1...Sh5
- 2.Qf5#
- 2.Qxc6#
- 2.Qe6#
- 1...g4
- 2.Rf4#
- 2.Qxg4#
- 2.Qxc6#
- 2.Qe6#
- 1...e5
- 2.Rxe5#
- 2.Qg4#
- 2.Qxc6#
- 1...e6
- 2.Rexe6#
- 2.Qxc6#
- 2.Qxe6#
- 1...Rxc3!
- threat
- 1.Sdf4?
- threat
- 2.Qxc6#
- 2.Qe6#
- 1...gxf4
- 2.Rxf4#
- 1...Rd3
- 2.Qe6#
- 1...f2
- 2.Qxc6#
- 1...Qh3
- 2.Qxc6#
- 1...Qd1
- 2.Qe6#
- 1...Rc8
- 2.Qe6#
- 1...Rd8
- 2.Qe6#
- 1...Ba4
- 2.Qe6#
- 1...Sd3
- 2.Qxc6#
- 1...e5
- 2.Rxe5#
- 2.Qxc6#
- 1...e6
- 2.Rexe6#
- 2.Qxc6#
- 2.Qxe6#
- 1...Rxc3!
- threat
- 1.Sgf4?
- threat
- 2.Qxc6#
- 2.Qe6#
- 1...Rxd3
- 2.Qe6#
- 1...Sxd3
- 2.Qxc6#
- 1...gxf4
- 2.Rxf4#
- 1...f2
- 2.Qxc6#
- 1...Qh3
- 2.Sf2#
- 2.Qxc6#
- 1...Rc8
- 2.Qe6#
- 1...Rd8
- 2.Qe6#
- 1...Ba4
- 2.Qe6#
- 1...e5
- 2.Rxe5#
- 2.Qxc6#
- 1...e6
- 2.Rexe6#
- 2.Qxc6#
- 2.Qxe6#
- 1...cxd3!
- threat
- 1.Sge5?
- threat
- 2.Qg4#
- 2.Qxc6#
- 1...Sxd3
- 2.Qxc6#
- 1...cxd3
- 2.Qg4#
- 1...exf6
- 2.Qg4#
- 1...Qh3
- 2.Sf2#
- 2.Qxc6#
- 1...Rc8
- 2.Qg4#
- 1...Rd8
- 2.Qg4#
- 1...Ba4
- 2.Qg4#
- 1...Sf5
- 2.Qxf5#
- 2.Qxc6#
- 1...Sh5
- 2.Bh7#
- 2.Qf5#
- 2.Qxc6#
- 1...g4
- 2.Rf4#
- 2.Qxg4#
- 2.Qxc6#
- 1...e6
- 2.Qxc6#
- 1...Rxd3!
- threat
- 1.Sxe7?
- threat
- 2.Re6#
- 1...Rxd3
- 2.Qe6#
- 1...Bxe7
- 2.Rxe7#
- 1...Sxd3
- 2.Qxc6#
- 1...cxd3
- 2.Qg4#
- 1...Qh3
- 2.Sf2#
- 1...Bg7
- 2.Sc8#
- 1...f2!
- threat
- 1.Sxf8?
- threat
- 2.Rxe7#
- 1...Sxd3
- 2.Qxc6#
- 1...cxd3
- 2.Qg4#
- 1...Qh3
- 2.Sf2#
- 1...Sf5
- 2.Re6#
- 2.Qxf5#
- 1...e5
- 2.Rxe5#
- 1...e6
- 2.Rexe6#
- 1...Rxe8!
- threat
- 1.Bxc4?
- threat
- 2.Qg4#
- 2.Qxc6#
- 2.Qe6#
- 1...Rxd3
- 2.Qe6#
- 1...Sxd3
- 2.Qxc6#
- 1...Qh3
- 2.Sf2#
- 2.Qxc6#
- 1...Rc8
- 2.Qg4#
- 2.Qe6#
- 1...Rd8
- 2.Qg4#
- 2.Qe6#
- 1...Ba4
- 2.Qg4#
- 2.Qe6#
- 1...Sf5
- 2.Re6#
- 2.Qxf5#
- 2.Qxc6#
- 2.Qe6#
- 1...Sh5
- 2.Qf5#
- 2.Qxc6#
- 2.Qe6#
- 1...g4
- 2.Rf4#
- 2.Qxg4#
- 2.Qxc6#
- 2.Qe6#
- 1...e5
- 2.Rxe5#
- 2.Qg4#
- 2.Qxc6#
- 1...e6
- 2.Rexe6#
- 2.Qxc6#
- 2.Qxe6#
- 1...Bxc4!
- threat
- 1.Rd6?
- threat
- 2.Qg4#
- 2.Qe6#
- 1...Rxd3
- 2.Qe6#
- 1...cxd3
- 2.Qg4#
- 1...f2
- 2.Qg4#
- 1...e6
- 2.Qxe6#
- 1...Qh3
- 2.Sf2#
- 1...Bg7
- 2.Qg4#
- 1...Sf5
- 2.Re6#
- 2.Qxc6#
- 2.Qe6#
- 1...Sh5
- 2.Qe6#
- 1...g4
- 2.Qxg4#
- 2.Qe6#
- 1...e5
- 2.Rxe5#
- 2.Qg4#
- 1...Sxd3!
- threat
- 1.Rfxf8?
- threat
- 2.Rxe7#
- 1...Sxd3
- 2.Qxc6#
- 1...cxd3
- 2.Qg4#
- 1...Qh3
- 2.Sf2#
- 1...Sf5
- 2.Qxf5#
- 1...e5
- 2.Rxe5#
- 1...e6
- 2.Rxe6#
- 1...Rxe8!
- threat
- 1.Rd8?
- threat
- 2.Qg4#
- 2.Qxc6#
- 2.Qe6#
- 1...Rxd3
- 2.Qe6#
- 1...Sxd3
- 2.Qxc6#
- 1...cxd3
- 2.Qg4#
- 1...exf6
- 2.Qg4#
- 2.Qe6#
- 1...Qh3
- 2.Sf2#
- 2.Qxc6#
- 1...Rc8
- 2.Qg4#
- 2.Qe6#
- 1...Ba4
- 2.Qg4#
- 2.Qe6#
- 1...Sf5
- 2.Re6#
- 2.Qxf5#
- 2.Qxc6#
- 2.Qe6#
- 1...Sh5
- 2.Qf5#
- 2.Qxc6#
- 2.Qe6#
- 1...g4
- 2.Rf4#
- 2.Qxg4#
- 2.Qxc6#
- 2.Qe6#
- 1...e5
- 2.Qg4#
- 2.Qxc6#
- 1...e6
- 2.Qxc6#
- 2.Qxe6#
- 1...Rxd8!
- threat
- 1.axb6?
- threat
- 2.Sxc5#
- 1...Rxd3
- 2.Qe6#
- 1...Sxd3
- 2.Qxc6#
- 1...cxd3
- 2.Qg4#
- 1...e5
- 2.Rxe5#
- 1...e6
- 2.Rexe6#
- 1...Ra8+!
- threat
- 1.Sb2?
- Keys
- 1.Sh4!
- threat
- 2.Re6#
- 1...Rxd3
- 2.Qe6#
- 1...Sxd3
- 2.Qxc6#
- 1...cxd3
- 2.Qg4#
- 1...gxh4
- 2.Rf4#
- 1...Qh3
- 2.Sf2#
- 1...Bg7
- 2.Rxe7#
- 1...e5
- 2.Rxe5#
- 1...e6
- 2.Rfxe6#
- 2.Rexe6#
- threat
- 1.Sh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 10
- Sets
- Q(b);N_GUARD::S(C)
- Q(b);N_GUARD::S(C),XQ(b)
- R(e);SBLOCK,XS(C)::QAR2(G)
- B(p);N_GUARD::R(H),XP(n)
- S(a);SBLOCK,XS(C)::QAB(G),XP(m)
- S(g);N_GUARD::QAB1(G)
- P(h);SBLOCK,XS(C)::QAR2(G)
- P(k);N_GUARD::R1(E)
- P(l);N_GUARD,XP(D)::S(C),XP(j)
- P(l);N_GUARD::S(C),XP(j)
- P(n);OGATE::R1(H),XP(n)
- P(n);OGATE::R(H),XP(n)
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- R(e);::QAR2(G)
- Q(b);::QAB(G),XP(m)
- S(a);::QAB(G),XP(m)
- Refutation
- R(e);XB(B)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- P(k);OGATE,XS(C)::R1(E),XP(k)
- R(e);::QAR2(G)
- P(f);::QAB(G),XP(m)
- Q(b);::QAB(G),XP(m)
- Q(b);::QAR2(G)
- R(o);::QAR2(G)
- B(d);P_PINB(B)::QAR2(G)
- S(a);::QAB(G),XP(m)
- Refutation
- R(e);XB(B)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(e);XS(C)::QAR2(G)
- S(a);XS(C)::QAB(G),XP(m)
- P(k);OGATE,XS(F)::R1(E),XP(k)
- P(f);::QAB(G),XP(m)
- R(o);::QAR2(G)
- B(d);::QAR2(G)
- Refutation
- P(h);XS(C)
- Try
- S(F);N_PINP(n)
- Threat
- DUALS(2)
- Vars
- S(a);XS(C)::QAB(G),XP(m)
- P(h);XS(C)::QAR2(G)
- P(n);XR(E)::QAR2(G)
- R(o);::QAR2(G)
- B(d);::QAR2(G)
- P(n);::QAB(G),XP(m)
- Refutation
- R(e);XS(C)
- Try
- S(F);XP(n)
- Threat
- R(E)
- Vars
- R(e);SBLOCK,XS(C)::QAR2(G)
- B(p);OGATE,P_SPINB(p),XS(F)::R(H),XB(p)
- S(a);SBLOCK,XS(C)::QAB(G),XP(m)
- P(h);SBLOCK,XS(C)::QAR2(G)
- Q(b);N_GUARD::S(C)
- B(p);N_GUARD::R(H)+S(F)
- Refutation
- P(f);
- Try
- S(F);XB(p)
- Threat
- R(H),XP(n)
- Vars
- S(a);SBLOCK,XS(C)::QAB(G),XP(m)
- P(h);SBLOCK,XS(C)::QAR2(G)
- Q(b);N_GUARD::S(C)
- P(n);OGATE::R1(H),XP(n)
- P(n);OGATE::R(H),XP(n)
- Refutation
- R(o);N_SPINP(n),XR(H)
- Try
- B(I);XP(h)
- Threat
- DUALS(3)
- Vars
- R(e);XS(C)::QAR2(G)
- S(a);XS(C)::QAB(G),XP(m)
- Refutation
- B(d);XB(I)
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- R(e);XS(C)::QAR2(G)
- P(h);XS(C)::QAR2(G)
- P(f);::QAR2(G)
- P(n);::QAR2(G),XP(n)
- Q(b);N_GUARD::S(C)
- B(p);::QAR2(G)
- S(g);::QAR2(G)
- Refutation
- S(a);XS(C)
- Try
- R(E);XB(p)
- Threat
- R(H),XP(n)
- Vars
- S(a);SBLOCK,XS(C)::QAB(G),XP(m)
- P(h);SBLOCK,XS(C)::QAR2(G)
- Q(b);N_GUARD::S(C)
- S(g);N_GUARD::QAB1(G),XS(g)
- P(n);OGATE::R1(H),XP(n)
- P(n);OGATE::R(H),XP(n)
- Refutation
- R(o);N_SPINP(n),XR(H)
- Try
- R(H);N_PINP(n)
- Threat
- DUALS(3)
- Vars
- R(e);XS(C)::QAR2(G)
- S(a);XS(C)::QAB(G),XP(m)
- P(h);XS(C)::QAR2(G)
- Refutation
- R(o);XR(H)
- Try
- P(D);XP(l)
- Threat
- S(C),XP(j)
- Vars
- R(e);SBLOCK,XS(C)::QAR2(G)
- S(a);SBLOCK,XS(C)::QAB(G),XP(m)
- P(h);SBLOCK,XS(C)::QAR2(G)
- P(n);OGATE::R1(H),XP(n)
- P(n);OGATE::R(H),XP(n)
- Refutation
- R(o);CHECK
- Try
- Actual
- S(F);
- Threat
- R(E)
- Vars
- R(e);SBLOCK,XS(C)::QAR2(G)
- S(a);SBLOCK,XS(C)::QAB(G),XP(m)
- P(h);SBLOCK,XS(C)::QAR2(G)
- P(k);N_GUARD,XS(F)::R1(E)
- Q(b);N_GUARD::S(C)
- B(p);N_GUARD::R(H),XP(n)
- P(n);OGATE::R1(H),XP(n)
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).