MESON Chess Problem Database
Problem Display
PID: 101576 (8/3r4/Q2q2PB/3P1k2/4N1R1/5NpB/b5P1/K4R2 w - - 0 1)
Sheppard, Charles William
Good Companions, 1921
#2
11 + 5
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qe6#
- 2.Qf6#
- 1...Qb4
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qe6#
- 2.Qf6#
- 1...Qf4
- 2.Rxf4#
- 2.Qe6#
- 1...Qc5
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qe6#
- 2.Qf6#
- 1...Qe5+
- 2.Sd4#
- 1...Qc7
- 2.Rf4#
- 2.Rh4#
- 2.Qe6#
- 2.Qf6#
- 1...Qe7
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 1...Qb8
- 2.Rf4#
- 2.Rh4#
- 2.Qe6#
- 2.Qf6#
- 1...Qf8
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qe6#
- 1...Qxd5
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf6#
- 1...Qe6
- 2.Qxe6#
- 1...Qf6+
- 2.Qxf6#
- 1...Qxg6
- 2.Sxg3#
- 2.Rf4#
- 2.Qxg6#
- 1...Qa3
- Tries
- 1.Se1+?
- 1...Qf4
- 2.Qe6#
- 1...Ke5!
- 1...Qf4
- 1.Sg1+?
- 1...Qf4
- 2.Qe6#
- 1...Ke5!
- 1...Qf4
- 1.Sfd2+?
- 1...Qf4
- 2.Rg5#
- 2.Qe6#
- 2.Qf6#
- 1...Ke5!
- 1...Qf4
- 1.Sh2+?
- 1...Qf4
- 2.Qe6#
- 1...Ke5!
- 1...Qf4
- 1.Sxg3+?
- 1...Qxg3
- 2.Rf4#
- 2.Qe6#
- 1...Kf6!
- 1...Qxg3
- 1.Bg7?
- threat
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 1...Qe5+
- 2.Sd4#
- 2.Sxe5#
- 1...Qf6+
- 2.Qxf6#
- 1...Qxa6
- 2.Sd4#
- 2.Sh4#
- 2.Sxg3#
- 1...Bxd5
- 2.Sd4#
- 1...Qf4
- 2.Qe6#
- 1...Qa3
- 2.Sd4#
- 2.Sh4#
- 2.Sxg3#
- 2.Rh4#
- 2.Qe6#
- 2.Qf6#
- 1...Qc5
- 2.Sd4#
- 2.Sh4#
- 2.Sxg3#
- 2.Rh4#
- 2.Qe6#
- 2.Qf6#
- 1...Qb6
- 2.Sd4#
- 2.Sh4#
- 2.Sxg3#
- 1...Bc4
- 2.Sd4#
- 2.Sh4#
- 1...Rxg7!
- threat
- 1.Re1?
- threat
- 2.Rxg3#
- 1...Qf6+
- 2.Qxf6#
- 1...Qxg6
- 2.Sxg3#
- 2.Rf4#
- 2.Rxg6#
- 2.Qxg6#
- 1...Qf4
- 2.Rxf4#
- 2.Rg5#
- 2.Qe6#
- 2.Qf6#
- 1...Qe5+!
- threat
- 1.Rg5+?
- 1...Kf4
- 2.Re5#
- 1...Kxe4!
- 1...Kf4
- 1.Qe2?
- threat
- 2.Rxg3#
- 1...Qe5+
- 2.Sd4#
- 1...Qxg6
- 2.Rf4#
- 1...Qf4
- 2.Rg5#
- 1...Qf6+!
- threat
- 1.Qxd6?
- threat
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 2.Qxd7#
- 1...Bxd5
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qe5#
- 2.Qf6#
- 1...Ra7
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 1...Rb7
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 1...Rc7
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 1...Re7
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qf6#
- 1...Rf7
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 1...Rg7
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 1...Rh7
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 1...Rd8
- 2.Se1#
- 2.Sg1#
- 2.Sfd2#
- 2.Sh2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 2.Sfg5#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 1...Bc4
- 2.Sd4#
- 2.Sh4#
- 2.Sxg3#
- 2.Rf4#
- 2.Rh4#
- 2.Qf4#
- 2.Qe5#
- 2.Qe6#
- 2.Qf6#
- 2.Qxd7#
- 1...Rxd6!
- threat
- 1.Se1+?
- Keys
- 1.Qd3!
- threat
- 2.Rxg3#
- 1...Qe5+
- 2.Sd4#
- 1...Qf6+
- 2.Sc3#
- 1...Qxg6
- 2.Rf4#
- 1...Qf4
- 2.Rg5#
- threat
- 1.Qd3!
This is a version of 21797
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(d);CHECK,SBLOCK::R(B)+S(D),DCHECK
- Q(d);OGATE::QAB1(I),XQ(d)
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- Tries
- Try
- S(D);CHECK
- Vars
- Q(d);OGATE,P_SPINQ(d)::QAB1(I)
- Refutation
- K(c);P-FLIGHT
- Try
- S(D);CHECK
- Vars
- Q(d);OGATE,P_SPINQ(d)::QAB1(I)
- Refutation
- K(c);P-FLIGHT
- Try
- S(D);CHECK
- Refutation
- K(c);P-FLIGHT
- Try
- S(D);CHECK
- Vars
- Q(d);OGATE,P_SPINQ(d)::QAB1(I)
- Refutation
- K(c);P-FLIGHT
- Try
- S(F);CHECK,XP(b)
- Refutation
- K(c);P-FLIGHT,P_SPINQ(d)
- Try
- B(K);
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- B(a);XP(H)::R(B)+S(D),DCHECK
- Q(d);OGATE::QAB1(I)
- Refutation
- R(e);XB(K)
- Try
- R(B);
- Threat
- B(E)+R(G),XP(b)
- Vars
- Q(d);CHECK,OGATE::QAR1(I),XQ(d)
- Refutation
- Q(d);CHECK
- Try
- R(G);CHECK
- Vars
- K(c);OGATE,P-FLIGHT::B(K)+R(G)
- Refutation
- K(c);S_FLIGHT,XS(F)
- Try
- Q(I);
- Threat
- B(E)+R(G),XP(b)
- Vars
- Q(d);CHECK,SBLOCK::R(B)+S(D),DCHECK
- Q(d);SBLOCK,XP(J)::B(E)+R(G),DCHECK
- Q(d);SBLOCK::B(E)+R(G),DCHECK
- Refutation
- Q(d);CHECK
- Try
- Q(I);XQ(d)
- Threat
- DUALS(16)
- Refutation
- R(e);XQ(I)
- Try
- Actual
- Q(I);
- Threat
- B(E)+R(G),XP(b)
- Vars
- Q(d);CHECK,SBLOCK::R(B)+S(D),DCHECK
- Q(d);CHECK,SBLOCK::QAB(I)+S(F)
- Q(d);SBLOCK,XP(J)::B(E)+R(G),DCHECK
- Q(d);SBLOCK::B(E)+R(G),DCHECK
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).