MESON Chess Problem Database
Problem Display
PID: 140060 (8/n7/3B4/Q1p2N2/1qP1k2r/1R1p1R1p/N3B2n/6bK w - - 0 1)
Dobbs, Gilbert S
The Problemist, 1938
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Sc3#
- 1...Qc3
- 2.Sxc3#
- 1...Qa4
- 2.Sc3#
- 1...Qb5
- 2.Sc3#
- 1...Qb6
- 2.Sc3#
- 1...Qb7
- 2.Sc3#
- 1...Qb8
- 2.Sc3#
- 1...Rf4
- 2.Rxf4#
- 1...Rh5
- 2.Rf4#
- 1...Rh6
- 2.Rf4#
- 1...Rh7
- 2.Rf4#
- 1...Rh8
- 2.Rf4#
- 1...Bd4
- 2.Sg3#
- 1...Sxf3
- 2.Bxd3#
- 1...Sg4
- 2.Rf4#
- 1...Sb5
- 2.Qa8#
- 1...Qa3
- Tries
- 1.Qc7?
- threat
- 2.Qe7#
- 1...Sxf3
- 2.Bxd3#
- 1...Rf4
- 2.Rxf4#
- 1...Qc3
- 2.Sxc3#
- 1...Qb7
- 2.Sc3#
- 1...Rh6
- 2.Rf4#
- 1...Rh7
- 2.Rf4#
- 1...Bd4
- 2.Sg3#
- 1...Sg4
- 2.Rf4#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...Qxc4!
- threat
- 1.Qxc5?
- threat
- 2.Sg3#
- 2.Qd5#
- 2.Qe5#
- 1...Qxc5
- 2.Sc3#
- 1...Qxc4
- 2.Sg3#
- 2.Qe5#
- 1...Sxf3
- 2.Sg3#
- 2.Bxd3#
- 2.Qd5#
- 1...Rg4
- 2.Qd5#
- 2.Qe5#
- 1...Qe1
- 2.Qd5#
- 2.Qe5#
- 1...Qc3
- 2.Sxc3#
- 2.Sg3#
- 2.Qd5#
- 1...Qa5
- 2.Sg3#
- 1...Qb5
- 2.Sc3#
- 2.Sg3#
- 1...Qb7
- 2.Sc3#
- 2.Sg3#
- 2.Qe5#
- 1...Bf2
- 2.Qd5#
- 2.Qe5#
- 1...Bd4
- 2.Sg3#
- 2.Qxd4#
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 2.Qe5#
- 1...Sg4
- 2.Sg3#
- 2.Rf4#
- 2.Qd5#
- 1...Sc6
- 2.Sg3#
- 2.Qd5#
- 2.Qxc6#
- 1...Bxc5!
- threat
- 1.Qxa7?
- threat
- 2.Qe7#
- 1...Sxf3
- 2.Bxd3#
- 1...Rf4
- 2.Rxf4#
- 1...Qc3
- 2.Sxc3#
- 2.Qb7#
- 2.Qa8#
- 1...Qb7
- 2.Sc3#
- 2.Qxb7#
- 1...Rh6
- 2.Rf4#
- 1...Rh7
- 2.Rf4#
- 1...Bd4
- 2.Sg3#
- 1...Sg4
- 2.Rf4#
- 1...Qxc4!
- threat
- 1.Qc7?
- Keys
- 1.Qa4!
- threat
- 2.Qe8#
- 1...Qxa4
- 2.Sc3#
- 1...Qxc4
- 2.Sc3#
- 1...Sxf3
- 2.Bxd3#
- 1...Rf4
- 2.Rxf4#
- 1...Qc3
- 2.Sxc3#
- 1...Qb5
- 2.Sc3#
- 1...Qb7
- 2.Sc3#
- 1...Qb8
- 2.Sc3#
- 1...Rh6
- 2.Rf4#
- 1...Rh7
- 2.Rf4#
- 1...Rh8
- 2.Rf4#
- 1...Bd4
- 2.Sg3#
- 1...Sg4
- 2.Rf4#
- 1...Sb5
- 2.Qa8#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- threat
- 1.Qa4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(e);N_GUARD::S(B)
- Q(e);N_GUARD::S(B),XQ(e)
- R(g);N_GUARD::R1(E),XR(g)
- R(g);N_GUARD::R1(E)
- B(a);SBLOCK::S(H)
- S(b);SBLOCK,XR(E)::B(C),XP(c)
- S(b);S_CUTR(g)::R1(E)
- S(i);OGATE::QAB(G)
- Tries
- Try
- Q(G);
- Threat
- QAR(G)
- Vars
- S(b);SBLOCK,XR(E)::B(C),XP(c)
- R(g);N_GUARD::R1(E),XR(g)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);N_GUARD::S(B)
- R(g);N_GUARD::R1(E)
- B(a);SBLOCK::S(H)
- S(b);S_CUTR(g)::R1(E)
- S(i);N_GUARD::QAB(G),XS(i)
- S(i);N_GUARD::QAB(G)
- Refutation
- Q(e);XP(F)
- Try
- Q(G);XP(h)
- Threat
- DUALS(3)
- Vars
- Q(e);N_GUARD,XQ(G)::S(B)
- Q(e);::S(H)
- Refutation
- B(a);XQ(G)
- Try
- Q(G);XS(i)
- Threat
- QAR(G)
- Vars
- S(b);SBLOCK,XR(E)::B(C),XP(c)
- R(g);N_GUARD::R1(E),XR(g)
- R(g);N_GUARD::R1(E)
- B(a);SBLOCK::S(H)
- S(b);S_CUTR(g)::R1(E)
- Refutation
- Q(e);XP(F)
- Try
- Actual
- Q(G);
- Threat
- QAR(G)
- Vars
- Q(e);N_GUARD,XQ(G)::S(B)
- Q(e);N_GUARD,P_SPINQ(e),XP(F)::S(B)
- S(b);SBLOCK,XR(E)::B(C),XP(c)
- R(g);N_GUARD::R1(E),XR(g)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);N_GUARD::S(B)
- R(g);N_GUARD::R1(E)
- B(a);SBLOCK::S(H)
- S(b);S_CUTR(g)::R1(E)
- S(i);OGATE::QAB(G)
- S(i);N_GUARD::QAB(G),XS(i)
- S(i);N_GUARD::QAB(G)
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).