MESON Chess Problem Database
Problem Display
PID: 101571 (3NKn2/Q1ppp3/3k4/3q2R1/p2N3R/b7/8/8 w - - 0 1)
Sheppard, Charles William
Good Companions, 1919
#2
6 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Sb5#
- 2.Sf7#
- 1...Qa2
- 2.Sb5#
- 2.Sb7#
- 1...Qg2
- 2.Sb5#
- 2.Sf7#
- 1...Qf3
- 2.Sb5#
- 1...Qc4
- 2.Sb7#
- 1...Qe4
- 2.Sb5#
- 2.Sf7#
- 1...Qc6
- 2.Sf7#
- 1...Qe6
- 2.Sb5#
- 2.Sb7#
- 1...Qb7
- 2.Sxb7#
- 2.Sf7#
- 1...Qf7+
- 2.Sxf7#
- 1...Qa8
- 2.Sb5#
- 1...Qg8
- 2.Sb5#
- 2.Sb7#
- 1...Qxd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Qa5
- 2.Sb7#
- 2.Sf7#
- 1...Qb5
- 2.Sxb5#
- 2.Sf7#
- 1...Qc5
- 2.Sb7#
- 2.Sf7#
- 1...Bc5
- 2.Sb5#
- 1...Se6
- 2.Sf7#
- 1...c5
- 2.Sb5#
- 2.Qb8#
- 1...e5
- 2.Sf5#
- 1...e6
- 2.Sf7#
- 1...Qh1
- Tries
- 1.Rh6+?
- 1...Qe6
- 2.Sb5#
- 2.Sb7#
- 2.Sf7#
- 1...Se6
- 2.Sf7#
- 1...e6
- 2.Sf7#
- 1...Sg6!
- 1...Qe6
- 1.Qc5+?
- 1...Qxc5
- 2.Sb7#
- 2.Sf7#
- 1...Bxc5
- 2.Sb5#
- 1...Kxc5!
- 1...Qxc5
- 1.Qb6+?
- 1...Qc6
- 2.Sb5#
- 2.Sb7#
- 2.Sf7#
- 1...c6
- 2.Sb7#
- 1...cxb6!
- 1...Qc6
- 1.Rh6+?
- Keys
- 1.Qa5!
- threat
- 2.Rxd5#
- 2.Qxd5#
- 1...Qf7+
- 2.Sxf7#
- 1...Qxd4
- 2.Rxd4#
- 1...Qxa5
- 2.Sb7#
- 2.Sf7#
- 1...Qxg5
- 2.Sb7#
- 2.Sf7#
- 1...Qh1
- 2.Sb5#
- 2.Sf5#
- 2.Sf7#
- 2.Qe5#
- 1...Qa2
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Qe5#
- 1...Qg2
- 2.Sb5#
- 2.Sf5#
- 2.Sf7#
- 2.Qe5#
- 1...Qb3
- 2.Sf5#
- 2.Qe5#
- 1...Qf3
- 2.Sb5#
- 2.Qe5#
- 1...Qc4
- 2.Sf5#
- 2.Sb7#
- 2.Qe5#
- 1...Qe4
- 2.Sb5#
- 2.Sf7#
- 1...Qc6
- 2.Sf5#
- 2.Sf7#
- 2.Qe5#
- 1...Qe6
- 2.Sb5#
- 2.Sb7#
- 1...Qb7
- 2.Sf5#
- 2.Sxb7#
- 2.Sf7#
- 2.Qe5#
- 1...Qa8
- 2.Sb5#
- 2.Sf5#
- 2.Qe5#
- 1...Qg8
- 2.Sb5#
- 2.Sf5#
- 2.Sb7#
- 2.Qe5#
- 1...Qb5
- 2.Sxb5#
- 2.Sf7#
- 1...Qc5
- 2.Sb7#
- 2.Sf7#
- 1...Qe5
- 2.Sb7#
- 2.Sf7#
- 2.Qxe5#
- 1...Qf5
- 2.Sxf5#
- 2.Sb7#
- 1...Bc5
- 2.Sb5#
- 1...c5
- 2.Sb5#
- 1...c6
- 2.Sb7#
- 1...e5
- 2.Sf5#
- 1...e6
- 2.Sf7#
- threat
- 1.Qa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(c);N_GUARD::S(A)
- Q(c);N_GUARD::S(E)
- Q(c);CHECK,N_GUARD::S(E),XQ(c)
- Q(c);N_GUARD,P_PINS(E)::S(A)
- B(a);S_CUTQ(c)::S(A)
- S(h);S_CUTQ(c)::S(E)
- P(g);SBLOCK,S_CUTQ(c)::S(A)
- P(g);S_CUTQ(c)::S(E)
- Tries
- Try
- R(B);CHECK
- Vars
- S(h);P_SPINS(h)::S(E)
- P(g);P_SPINP(g)::S(E)
- Refutation
- S(h);P_SPINS(h)
- Try
- Q(D);CHECK
- Vars
- B(a);SBLOCK,XQ(D)::S(A)
- Refutation
- K(d);P_SPINQ(c),S_FLIGHT,XQ(D)
- Try
- Q(D);CHECK
- Vars
- P(e);P_SPINP(e)::S(E)
- Refutation
- P(e);XQ(D)
- Try
- Actual
- Q(D);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,N_GUARD::S(E),XQ(c)
- Q(c);OGATE,XS(A)::R(B),XQ(c)
- B(a);SBLOCK,S_CUTQ(c)::S(A)
- P(e);SBLOCK,S_CUTQ(c)::S(A)
- P(e);S_CUTQ(c)::S(E)
- P(g);SBLOCK,S_CUTQ(c)::S(A)
- P(g);S_CUTQ(c)::S(E)
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).