MESON Chess Problem Database
Problem Display
PID: 186873 (N3n1B1/7R/QKppp3/1p1k1p2/3p1PP1/1p6/3N4/8 w - - 0 1)
Howard, David M
Problem Observer, 2018
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...fxg4
- 2.Rh5#
- 1...c5
- 2.Qb7#
- 1...Sf6
- Tries
- 1.Bf7?
- 1...fxg4
- 2.Rh5#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...d3!
- 1...fxg4
- 1.Rh1?
- 1...fxg4
- 2.Rh5#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...d3!
- 1...fxg4
- 1.Rh2?
- 1...fxg4
- 2.Rh5#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...d3!
- 1...fxg4
- 1.Rh4?
- 1...fxg4
- 2.Rh5#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...d3!
- 1...fxg4
- 1.Rh5?
- threat
- 2.Rxf5#
- 1...Sg7
- 2.Sc7#
- 1...d3!
- threat
- 1.Rh6?
- threat
- 2.Bxe6#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...d3!
- threat
- 1.Re7?
- threat
- 2.Bxe6#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...d3!
- threat
- 1.Rf7?
- threat
- 2.Rxf5#
- 1...fxg4
- 2.Rf5#
- 1...Sf6
- 2.Sc7#
- 1...Sg7
- 2.Sc7#
- 1...d3!
- threat
- 1.Rg7?
- 1...Sxg7
- 2.Sc7#
- 1...fxg4
- 2.Rg5#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...d3!
- 1...Sxg7
- 1.Rh8?
- 1...fxg4
- 2.Rh5#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...d3!
- 1...fxg4
- 1.Qxb5+?
- 1...c5
- 2.Qc4#
- 2.Qc6#
- 1...cxb5!
- 1...c5
- 1.Qc8?
- threat
- 2.Bxe6#
- 2.Qxe6#
- 2.Qxc6#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 2.Qxc6#
- 1...c5
- 2.Bxe6#
- 2.Qxe6#
- 2.Qb7#
- 2.Qc6#
- 1...d3!
- threat
- 1.Qa1?
- threat
- 2.Qh1#
- 1...Sf6
- 2.Sc7#
- 1...d3!
- threat
- 1.gxf5?
- threat
- 2.Bxe6#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...d3!
- threat
- 1.g5?
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...d3!
- 1...Sf6
- 1.Bf7?
- Keys
- 1.Rh3!
- 1...fxg4
- 2.Rh5#
- 1...d3
- 2.Rxd3#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...b2
- 2.Qa2#
- 1...b4
- 2.Qc4#
- 1...c5
- 2.Qb7#
- 1...fxg4
- 1.Rh3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(e);OGATEB,XP(C)::R(F)
- P(f);OGATEB::QAB(D)
- Tries
- Try
- B(H);
- Vars
- P(e);OGATEB,XP(C)::R(F)
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
- Refutation
- P(b);
- Try
- R(F);
- Vars
- P(e);OGATEB,XP(C)::R(F)
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
- Refutation
- P(b);
- Try
- R(F);
- Vars
- P(e);OGATEB,XP(C)::R(F)
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
- Refutation
- P(b);
- Try
- R(F);
- Vars
- P(e);OGATEB,XP(C)::R(F)
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
- Refutation
- P(b);
- Try
- R(F);N_PINP(h),P_PINP(e)
- Threat
- R(F),XP(e)
- Vars
- S(i);N_GUARD::S(G)
- Refutation
- P(b);
- Try
- R(F);
- Threat
- B(H),XP(h)
- Vars
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- Refutation
- P(b);
- Try
- R(F);
- Threat
- B(H),XP(h)
- Vars
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- Refutation
- P(b);
- Try
- R(F);N_PINP(h)
- Threat
- R(F),XP(e)
- Vars
- P(e);XP(C)::R(F)
- S(i);N_GUARD::S(G)
- Refutation
- P(b);
- Try
- R(F);
- Vars
- S(i);N_GUARD,XR(F)::S(G)
- P(e);OGATEB,XP(C)::R(F)
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
- Refutation
- P(b);
- Try
- R(F);
- Vars
- P(e);OGATEB,XP(C)::R(F)
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
- Refutation
- P(b);
- Try
- Q(D);CHECK,XP(c)
- Refutation
- P(f);XQ(D)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- S(i);N_GUARD::S(G),XS(i)
- Refutation
- P(b);
- Try
- Q(D);
- Threat
- QAB(D)
- Vars
- S(i);N_GUARD::S(G)
- Refutation
- P(b);
- Try
- P(C);XP(e)
- Threat
- B(H),XP(h)
- Vars
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- Refutation
- P(b);
- Try
- P(C);
- Vars
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
- Refutation
- P(b);
- Try
- Actual
- R(F);
- Vars
- P(e);OGATEB,XP(C)::R(F)
- P(b);OGATEB::R(F),XP(b)
- S(i);N_GUARD::S(G)
- S(i);N_GUARD::S(G),XS(i)
- P(a);OGATEB::QAB(D)
- P(c);OGATE::QAB1(D)
- P(f);OGATEB::QAB(D)
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).