MESON Chess Problem Database
Problem Display
PID: 142895 (B3N2Q/2p1r1B1/6R1/1r1n1pp1/Np2k3/3pP3/3P3p/1K3R2 w - - 0 1)
Flagg, John O
4th Prize, St. John Globe, 0000
#2
10 + 10
| 15 | British Chess Magazine | 1892 |
SOLUTION
- SOUND
- Sets
- 1...Rc5
- 2.Sxc5#
- 1...Rb6
- 2.Sc5#
- 1...Rb7
- 2.Sc5#
- 1...Rb8
- 2.Sc5#
- 1...Re5
- 2.Sf6#
- 1...Re6
- 2.Rxe6#
- 1...Rd7
- 2.Re6#
- 1...Rf7
- 2.Re6#
- 1...Rxg7
- 2.Re6#
- 1...Rxe8
- 2.Qxe8#
- 1...h1Q
- 2.Qxh1#
- 1...h1S
- 2.Qxh1#
- 1...h1B
- 2.Qxh1#
- 1...h1R
- 2.Qxh1#
- 1...b3
- 2.Sc3#
- 1...g4
- 2.Rf4#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Rc5
- Tries
- 1.Ba1?
- threat
- 2.Sf6#
- 2.Qd4#
- 1...Rxe8
- 2.Qd4#
- 2.Qxe8#
- 1...Rb6
- 2.Sc5#
- 2.Qd4#
- 1...Rb7
- 2.Sc5#
- 2.Qd4#
- 1...Re5
- 2.Sf6#
- 2.Qxe5#
- 1...Re6
- 2.Rxe6#
- 2.Qd4#
- 1...Rf7
- 2.Re6#
- 2.Qd4#
- 2.Qe5#
- 1...Rg7
- 2.Sf6#
- 2.Re6#
- 1...c5
- 2.Sd6#
- 2.Sf6#
- 1...c6
- 2.Sd6#
- 2.Qd4#
- 1...f4!
- threat
- 1.Bb2?
- threat
- 2.Sf6#
- 2.Qd4#
- 1...Rxe8
- 2.Qd4#
- 2.Qxe8#
- 1...Rb6
- 2.Sc5#
- 2.Qd4#
- 1...Rb7
- 2.Sc5#
- 2.Qd4#
- 1...Re5
- 2.Sf6#
- 2.Qxe5#
- 1...Re6
- 2.Rxe6#
- 2.Qd4#
- 1...Rf7
- 2.Re6#
- 2.Qd4#
- 2.Qe5#
- 1...Rg7
- 2.Sf6#
- 2.Re6#
- 1...c5
- 2.Sd6#
- 2.Sf6#
- 1...c6
- 2.Sd6#
- 2.Qd4#
- 1...f4!
- threat
- 1.Bd4?
- threat
- 2.Sf6#
- 1...Rxe8
- 2.Qxe8#
- 1...Rb6
- 2.Sc5#
- 1...Rb7
- 2.Sc5#
- 1...Re6
- 2.Rxe6#
- 1...Rf7
- 2.Re6#
- 2.Qe5#
- 1...c6
- 2.Sd6#
- 1...f4!
- threat
- 1.Bh6?
- threat
- 2.Qd4#
- 1...Rg7
- 2.Re6#
- 1...Re5
- 2.Sf6#
- 1...c5
- 2.Sd6#
- 1...f4!
- threat
- 1.Bf8?
- threat
- 2.Qd4#
- 1...Rg7
- 2.Re6#
- 1...Re5
- 2.Sf6#
- 1...c5
- 2.Sd6#
- 1...f4!
- threat
- 1.Rxg5?
- threat
- 2.Rf4#
- 1...h1Q
- 2.Qxh1#
- 1...h1R
- 2.Qxh1#
- 1...Rb7
- 2.Sc5#
- 1...f4
- 2.Sf6#
- 2.Rxf4#
- 2.Qh7#
- 1...c6
- 2.Sd6#
- 1...Rxg7!
- threat
- 1.Ra6?
- 1...Rxg7
- 2.Re6#
- 1...Rxe8
- 2.Qxe8#
- 1...f4
- 2.Qh7#
- 1...h1Q
- 2.Qxh1#
- 1...h1S
- 2.Qxh1#
- 1...h1B
- 2.Qxh1#
- 1...h1R
- 2.Qxh1#
- 1...Rc5
- 2.Sxc5#
- 1...Rb6
- 2.Sc5#
- 1...Rb7
- 2.Sc5#
- 1...Rb8
- 2.Sc5#
- 1...Re5
- 2.Sf6#
- 1...Re6
- 2.Rxe6#
- 1...Rd7
- 2.Re6#
- 1...Rf7
- 2.Re6#
- 1...b3
- 2.Sc3#
- 1...g4
- 2.Rf4#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Ra5!
- 1...Rxg7
- 1.Rc6?
- threat
- 2.Rc4#
- 1...Rxg7
- 2.Re6#
- 1...Sf6
- 2.Re6#
- 1...f4
- 2.Qh7#
- 1...Rc5
- 2.Sxc5#
- 1...Sc3+!
- threat
- 1.Qxh2?
- threat
- 2.Sf6#
- 2.Qh1#
- 2.Qg2#
- 1...Rxg7
- 2.Sf6#
- 2.Re6#
- 1...Rxe8
- 2.Qh1#
- 2.Qg2#
- 1...Rb6
- 2.Sc5#
- 2.Qh1#
- 2.Qg2#
- 1...Rb7
- 2.Sc5#
- 2.Qh1#
- 2.Qg2#
- 1...Re6
- 2.Rxe6#
- 2.Qh1#
- 2.Qg2#
- 1...Rf7
- 2.Re6#
- 2.Qe5#
- 2.Qh1#
- 2.Qg2#
- 1...c6
- 2.Sd6#
- 2.Qh1#
- 2.Qg2#
- 1...f4!
- threat
- 1.Qh3?
- threat
- 2.Qg2#
- 2.Qxf5#
- 2.Qf3#
- 1...Rxg7
- 2.Re6#
- 2.Qxf5#
- 1...h1Q
- 2.Qxf5#
- 2.Qxh1#
- 1...h1B
- 2.Qxf5#
- 2.Qxh1#
- 1...Re5
- 2.Sf6#
- 2.Qg2#
- 2.Qf3#
- 1...Rf7
- 2.Re6#
- 2.Qg2#
- 2.Qf3#
- 1...g4
- 2.Rf4#
- 2.Qg2#
- 1...f4!
- threat
- 1.Qh4+?
- 1...gxh4
- 2.Rf4#
- 1...g4
- 2.Rf4#
- 2.Qxe7#
- 1...f4!
- 1...gxh4
- 1.Qh5?
- threat
- 2.Qf3#
- 1...Rxg7
- 2.Re6#
- 1...h1Q
- 2.Qxh1#
- 1...h1B
- 2.Qxh1#
- 1...g4
- 2.Rf4#
- 2.Qxf5#
- 1...f4!
- threat
- 1.Qf8?
- threat
- 2.Qxe7#
- 2.Qxf5#
- 1...Rxg7
- 2.Re6#
- 2.Qxf5#
- 1...Rxe8
- 2.Qxf5#
- 2.Qxe8#
- 1...Rb6
- 2.Sc5#
- 2.Qxf5#
- 1...Rb7
- 2.Sc5#
- 2.Qxf5#
- 1...Re5
- 2.Sf6#
- 1...Re6
- 2.Rxe6#
- 2.Qxf5#
- 1...Rd7
- 2.Re6#
- 2.Qxf5#
- 1...Rf7
- 2.Re6#
- 1...c6
- 2.Sd6#
- 2.Qxf5#
- 1...f4!
- threat
- 1.Ba1?
- Keys
- 1.Rb6!
- 1...Rxb6
- 2.Sc5#
- 1...Rxg7
- 2.Re6#
- 1...Rxe8
- 2.Qxe8#
- 1...cxb6
- 2.Sd6#
- 1...f4
- 2.Qh7#
- 1...h1Q
- 2.Qxh1#
- 1...h1S
- 2.Qxh1#
- 1...h1B
- 2.Qxh1#
- 1...h1R
- 2.Qxh1#
- 1...Ra5
- 2.Rxb4#
- 1...Rc5
- 2.Sxc5#
- 1...Re5
- 2.Sf6#
- 1...Re6
- 2.Rxe6#
- 1...Rd7
- 2.Re6#
- 1...Rf7
- 2.Re6#
- 1...b3
- 2.Sc3#
- 1...g4
- 2.Rf4#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Rxb6
- 1.Rb6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(e);N_GUARD::S(E),XR(e)
- R(e);N_GUARD::S(E)
- R(e);N_GUARD,N_SPINS(f)::S(E)
- R(j);SBLOCK::S(I)
- R(j);N_GUARD::R(F),XR(j)
- R(j);N_GUARD::R(F)
- R(j);N_GUARD,XB(G)::R(F)
- R(j);OGATE,XS(I)::QAR(J),XR(j)
- P(a);OGATE,P_PINR(B)::QAB(J),XQ(a)
- P(a);OGATE::QAB(J),XS(a)
- P(a);OGATE::QAB(J),XB(a)
- P(a);OGATE,P_PINR(B)::QAB(J),XR(a)
- P(c);N_GUARD::S(E)
- P(h);N_GUARD::R1(B)
- P(i);N_GUARD::S(I)
- P(i);N_GUARD,N_SPINS(f)::S(I)
- Tries
- Try
- B(G);
- Threat
- DUALS(2)
- Refutation
- P(g);
- Try
- B(G);
- Threat
- DUALS(2)
- Refutation
- P(g);
- Try
- B(G);
- Threat
- S(I)
- Vars
- R(j);OGATE,XS(I)::QAR(J),XR(j)
- R(e);N_GUARD::S(E)
- R(e);N_GUARD,N_SPINS(f)::S(E)
- R(j);N_GUARD::R(F),XR(j)
- P(i);N_GUARD,N_SPINS(f)::S(I)
- Refutation
- P(g);
- Try
- B(G);
- Threat
- QAR1(J)
- Vars
- R(j);N_GUARD::R(F)
- R(j);SBLOCK::S(I)
- P(i);N_GUARD::S(I)
- Refutation
- P(g);
- Try
- B(G);
- Threat
- QAR1(J)
- Vars
- R(j);N_GUARD::R(F)
- R(j);SBLOCK::S(I)
- P(i);N_GUARD::S(I)
- Refutation
- P(g);
- Try
- R(F);XP(h)
- Threat
- R1(B)
- Vars
- P(a);OGATE,P_PINR(B)::QAB(J),XQ(a)
- P(a);OGATE,P_PINR(B)::QAB(J),XR(a)
- R(e);N_GUARD,N_SPINS(f)::S(E)
- P(i);N_GUARD,N_SPINS(f)::S(I)
- Refutation
- R(j);XB(G)
- Try
- R(F);
- Vars
- R(j);N_GUARD,XB(G)::R(F)
- R(j);OGATE,XS(I)::QAR(J),XR(j)
- P(g);OGATEB::QAB(J)
- P(a);OGATE,P_PINR(B)::QAB(J),XQ(a)
- P(a);OGATE::QAB(J),XS(a)
- P(a);OGATE::QAB(J),XB(a)
- P(a);OGATE,P_PINR(B)::QAB(J),XR(a)
- R(e);N_GUARD::S(E),XR(e)
- R(e);N_GUARD::S(E)
- R(e);N_GUARD,N_SPINS(f)::S(E)
- R(j);SBLOCK::S(I)
- R(j);N_GUARD::R(F),XR(j)
- R(j);N_GUARD::R(F)
- P(c);N_GUARD::S(E)
- P(h);N_GUARD::R1(B)
- P(i);N_GUARD::S(I)
- P(i);N_GUARD,N_SPINS(f)::S(I)
- Refutation
- R(e);
- Try
- R(F);N_PINS(f)
- Threat
- R(F)
- Vars
- R(j);N_GUARD,XB(G)::R(F)
- S(f);::B(H)+R(F),DCHECK
- P(g);OGATEB::QAB(J)
- R(e);N_GUARD::S(E),XR(e)
- Refutation
- S(f);CHECK
- Try
- Q(J);XP(a)
- Threat
- DUALS(3)
- Refutation
- P(g);
- Try
- Q(J);
- Threat
- DUALS(3)
- Refutation
- P(g);
- Try
- Q(J);CHECK
- Vars
- P(h);N_GUARD,XQ(J)::R1(B)
- Refutation
- P(g);P_SPINP(g)
- Try
- Q(J);
- Threat
- QAB1(J)
- Vars
- R(j);N_GUARD,XB(G)::R(F)
- P(a);OGATE,P_PINR(B)::QAB(J),XQ(a)
- P(a);OGATE::QAB(J),XB(a)
- Refutation
- P(g);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(j);SBLOCK::S(I)
- R(j);N_GUARD::R(F)
- Refutation
- P(g);
- Try
- Actual
- R(F);
- Vars
- R(e);N_GUARD,XR(F)::S(E)
- R(j);N_GUARD,XB(G)::R(F)
- R(j);OGATE,XS(I)::QAR(J),XR(j)
- P(i);N_GUARD,XR(F)::S(I)
- P(g);OGATEB::QAB(J)
- P(a);OGATE,P_PINR(B)::QAB(J),XQ(a)
- P(a);OGATE::QAB(J),XS(a)
- P(a);OGATE::QAB(J),XB(a)
- P(a);OGATE,P_PINR(B)::QAB(J),XR(a)
- R(e);OGATE::R(F),XP(c)
- R(e);N_GUARD::S(E),XR(e)
- R(j);SBLOCK::S(I)
- R(j);N_GUARD::R(F),XR(j)
- R(j);N_GUARD::R(F)
- P(c);N_GUARD::S(E)
- P(h);N_GUARD::R1(B)
- P(i);N_GUARD::S(I)
- P(i);N_GUARD,N_SPINS(f)::S(I)
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).