MESON Chess Problem Database
Problem Display
PID: 19317 (8/bp6/5Q2/6pq/k3p3/N1B5/1P6/K1N5 w - - 0 1)
Fenner, A Jack
Chess, 1938
#2
6 + 6
SOLUTION
- SOUND
- Sets
- 1...Bd4
- 2.Qxd4#
- 1...Bb8
- 2.Qd4#
- 1...b5
- 2.Qa6#
- 1...b6
- 2.Qd4#
- 1...Bd4
- Tries
- 1.Qe7?
- threat
- 2.Qb4#
- 2.b3#
- 1...Qd1
- 2.Qb4#
- 1...Qf7
- 2.Qb4#
- 1...Bc5!
- threat
- 1.Qf1?
- threat
- 2.Qc4#
- 2.Qb5#
- 1...Qf7
- 2.Qb5#
- 1...Qe8
- 2.Qc4#
- 2.Qd1#
- 1...Bc5
- 2.Qb5#
- 1...g4
- 2.Qc4#
- 2.Qd1#
- 1...b5
- 2.Qxb5#
- 1...Qe2!
- threat
- 1.Qb6?
- threat
- 2.Qa5#
- 2.Qxa7#
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Qd1
- 2.Qa5#
- 2.Qxa7#
- 2.Qb4#
- 2.Qb5#
- 1...Qe2
- 2.Qa5#
- 2.Qb3#
- 2.Qb4#
- 1...Qg6
- 2.Qa5#
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Qf7
- 2.Qa5#
- 2.Qxa7#
- 2.Qb4#
- 2.Qb5#
- 1...Qe8
- 2.Qa5#
- 2.Qxa7#
- 2.Qb3#
- 2.Qb4#
- 1...Qh6
- 2.Qa5#
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Bb8
- 2.Qd4#
- 2.Qa5#
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...g4
- 2.Qb3#
- 2.Qb4#
- 1...Bxb6!
- threat
- 1.Qc6+?
- 1...b5
- 2.Qxb5#
- 2.Qa6#
- 1...bxc6!
- 1...b5
- 1.Qd6?
- threat
- 2.Qb4#
- 2.b3#
- 1...Qd1
- 2.Qb4#
- 2.Qxd1#
- 1...Qf7
- 2.Qb4#
- 1...Bc5!
- threat
- 1.Qe6?
- threat
- 2.Qb3#
- 2.Qc4#
- 1...Qd1
- 2.Qc4#
- 1...Qe2
- 2.Qb3#
- 1...Bc5
- 2.Qb3#
- 1...b5
- 2.Qb3#
- 2.Qa6#
- 1...Qf7!
- threat
- 1.Qf7?
- threat
- 2.Qb3#
- 2.Qc4#
- 1...Qd1
- 2.Qc4#
- 1...Qe2
- 2.Qb3#
- 1...Bc5
- 2.Qb3#
- 1...b5
- 2.Qb3#
- 2.Qxa7#
- 1...Qxf7!
- threat
- 1.Qf8?
- threat
- 2.Qb4#
- 2.b3#
- 1...Qd1
- 2.Qb4#
- 1...Qf7
- 2.Qb4#
- 1...Bc5!
- threat
- 1.Qe7?
- Keys
- 1.Qd8!
- threat
- 2.Qa5#
- 1...Bb6
- 2.Qd7#
- 1...g4
- 2.Qd1#
- 1...b6
- 2.Qd4#
- threat
- 1.Qd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- B(e);N_GUARD::QAR(F),XB(e)
- B(e);N_GUARD::QAR(F)
- P(f);N_GUARD::QAR2(F)
- P(f);S_CUTB(e)::QAR(F)
- Tries
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(d);P_PINS(B)::QAR1(F)
- Q(d);::QAR1(F)
- Refutation
- B(e);
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(d);::QAB1(F)
- B(e);::QAB1(F)
- P(f);::QAB1(F),XP(f)
- Refutation
- Q(d);
- Try
- Q(F);
- Threat
- DUALS(5)
- Refutation
- B(e);XQ(F)
- Try
- Q(F);CHECK
- Refutation
- P(f);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(d);::QAR1(F)
- Refutation
- B(e);
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(d);P_PINS(B)::QAR2(F)
- Q(d);::QAB1(F)
- B(e);::QAB1(F)
- Refutation
- Q(d);
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(d);P_PINS(B)::QAR2(F)
- Q(d);::QAB1(F)
- B(e);::QAB1(F)
- Refutation
- Q(d);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- Q(d);P_PINS(B)::QAR1(F)
- Q(d);::QAR1(F)
- Refutation
- B(e);
- Try
- Actual
- Q(F);
- Threat
- QAR1(F)
- Vars
- B(e);S_CUTP(f)::QAB(F)
- P(c);S_CUTQ(d)::QAB(F)
- P(f);S_CUTB(e)::QAR(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).