MESON Chess Problem Database
Problem Display
PID: 1123 (4n3/pQ6/PpK1p3/2N1BN2/2k2p2/P7/2p1pp2/R4R2 w - - 0 1)
Townsend, Alonzo
The Westminster Papers, 1873
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Sd6
- 2.Sxd6#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...c1Q
- 2.Raxc1#
- 2.Rfxc1#
- 1...c1S
- 2.Raxc1#
- 2.Rfxc1#
- 1...c1B
- 2.Raxc1#
- 2.Rfxc1#
- 1...c1R
- 2.Raxc1#
- 2.Rfxc1#
- 1...f3
- 2.Se3#
- 1...bxc5
- 2.Qb5#
- 1...b5
- 2.Qxb5#
- 1...exf5
- 2.Qf7#
- 1...Sd6
- Tries
- 1.Rxf2?
- threat
- 2.Rxf4#
- 1...bxc5
- 2.Qb5#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...e1R
- 2.Rxc2#
- 1...Sd6
- 2.Sxd6#
- 1...Sf6
- 2.Sd6#
- 1...f3
- 2.Se3#
- 1...e1Q!
- threat
- 1.Qc8?
- threat
- 2.Qxe6#
- 1...exf5
- 2.Qe6#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...bxc5!
- threat
- 1.Qxb6?
- threat
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...c1S
- 2.Raxc1#
- 2.Rfxc1#
- 2.Qb4#
- 2.Qb5#
- 1...e1Q
- 2.Qb3#
- 2.Qb5#
- 1...e1B
- 2.Qb3#
- 2.Qb5#
- 1...Sd6
- 2.Sxd6#
- 2.Qb3#
- 2.Qb4#
- 1...Sc7
- 2.Sd6#
- 2.Qb3#
- 2.Qb4#
- 1...axb6!
- threat
- 1.Qd7?
- threat
- 2.Qxe6#
- 2.Qd3#
- 2.Qd4#
- 1...exf1Q
- 2.Qxe6#
- 2.Qd4#
- 1...exf1B
- 2.Qxe6#
- 2.Qd4#
- 1...exf5
- 2.Qe6#
- 2.Qd3#
- 2.Qd4#
- 2.Qd5#
- 2.Qf7#
- 1...c1S
- 2.Raxc1#
- 2.Rfxc1#
- 2.Qxe6#
- 2.Qd4#
- 1...e1S
- 2.Qxe6#
- 2.Qd4#
- 1...Sd6
- 2.Sxd6#
- 2.Qxe6#
- 1...Sf6
- 2.Sd6#
- 2.Qd3#
- 2.Qd4#
- 1...Sc7
- 2.Sd6#
- 2.Qd3#
- 2.Qd4#
- 1...Sg7
- 2.Sd6#
- 2.Qd3#
- 2.Qd4#
- 1...bxc5!
- threat
- 1.Qe7?
- threat
- 2.Qxe6#
- 1...exf5
- 2.Qe6#
- 2.Qf7#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...bxc5!
- threat
- 1.Qf7?
- threat
- 2.Qxe6#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...bxc5!
- threat
- 1.Rxf2?
- Keys
- 1.Rae1!
- 1...exf1Q
- 2.Re4#
- 1...exf1S
- 2.Re4#
- 1...exf1B
- 2.Re4#
- 1...exf1R
- 2.Re4#
- 1...fxe1Q
- 2.Rxf4#
- 1...fxe1S
- 2.Rxf4#
- 1...fxe1B
- 2.Rxf4#
- 1...fxe1R
- 2.Rxf4#
- 1...bxc5
- 2.Qb5#
- 1...exf5
- 2.Qf7#
- 1...c1Q
- 2.Rxc1#
- 1...c1S
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...Sd6
- 2.Sxd6#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...f3
- 2.Se3#
- 1...b5
- 2.Qxb5#
- 1...exf1Q
- 1.Rae1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 0
- Sets
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(e);N_GUARD::S(F)
- P(f);OGATE,XS(D)::QAB1(I)
- P(f);OGATE::QAB1(I),XP(f)
- P(g);OGATEB,XS(F)::QAB(I)
- Tries
- Try
- R(B);XP(c)
- Threat
- R(B),XP(e)
- Vars
- P(f);OGATE,XS(D)::QAB1(I)
- P(a);OGATEB::R(A),XQ(a)
- P(a);OGATEB::R(A),XB(a)
- P(b);OGATE::R(B),XP(a)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(e);N_GUARD::S(F)
- Refutation
- P(b);
- Try
- Q(I);
- Threat
- QAB(I),XP(g)
- Vars
- P(g);XS(F)::QAB(I)
- S(i);N_GUARD::S(F)
- Refutation
- P(f);XS(D)
- Try
- Q(I);XP(f)
- Threat
- DUALS(3)
- Refutation
- P(h);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(3)
- Refutation
- P(f);XS(D)
- Try
- Q(I);
- Threat
- QAB(I),XP(g)
- Vars
- S(i);N_GUARD::S(F)
- Refutation
- P(f);XS(D)
- Try
- Q(I);P_PINP(g)
- Threat
- QAB(I),XP(g)
- Vars
- S(i);N_GUARD::S(F)
- Refutation
- P(f);XS(D)
- Try
- Actual
- R(A);
- Vars
- P(b);OGATE,XR(B)::R(A)
- P(c);OGATE,XR(A)::R(B),XP(e)
- P(f);OGATE,XS(D)::QAB1(I)
- P(g);OGATEB,XS(F)::QAB(I)
- P(a);OGATEB::R(A),XQ(a)
- P(a);OGATEB::R(A),XS(a)
- P(a);OGATEB::R(A),XB(a)
- P(a);OGATEB::R(A),XR(a)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(e);N_GUARD::S(F)
- P(f);OGATE::QAB1(I),XP(f)
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).