MESON Chess Problem Database
Problem Display
PID: 189819 (6Q1/q7/7b/4p2K/4pkB1/7R/1N1r4/8 w - - 0 1)
Lissner, Morris
Pittsburgh Gazette-Times, 1912
#2
5 + 6
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Qf7#
- 1...Qf2
- 2.Qf7#
- 1...Qe3
- 2.Qf7#
- 1...Qd4
- 2.Qf7#
- 1...Qc5
- 2.Qf7#
- 1...Qb8
- 2.Qf7#
- 1...Qa1
- 2.Qf7#
- 1...Qa3
- 2.Qf7#
- 1...Qa4
- 2.Qf7#
- 1...Qa5
- 2.Qf7#
- 1...Qf7+
- 2.Qxf7#
- 1...Qa8
- 2.Qf7#
- 1...Bg5
- 2.Qxg5#
- 1...Bf8
- 2.Qg5#
- 1...Qg1
- Tries
- 1.Qe6?
- threat
- 2.Qf5#
- 2.Qf6#
- 2.Qxh6#
- 1...Qf7+
- 2.Qxf7#
- 1...e3
- 2.Qf5#
- 1...Qb6
- 2.Qf5#
- 1...Qa6
- 2.Qf5#
- 1...Qd7
- 2.Qxh6#
- 1...Qe7
- 2.Qf5#
- 1...Qg7
- 2.Qf5#
- 1...Rd6
- 2.Qf5#
- 1...Bg5
- 2.Qf5#
- 1...Bg7
- 2.Qf5#
- 1...Bf8
- 2.Qf5#
- 2.Qf6#
- 1...Qh7!
- threat
- 1.Qh7?
- threat
- 2.Qf5#
- 2.Qxh6#
- 1...Qf7+
- 2.Qxf7#
- 1...Qb6
- 2.Qf5#
- 1...Qa6
- 2.Qf5#
- 1...Qd7
- 2.Qxh6#
- 1...Qe7
- 2.Qf5#
- 1...Qg7
- 2.Qf5#
- 1...Rd6
- 2.Qf5#
- 1...Bg5
- 2.Qf5#
- 1...Bg7
- 2.Qf5#
- 1...Bf8
- 2.Qf5#
- 1...e3
- 2.Rf3#
- 2.Qf5#
- 1...Qxh7!
- threat
- 1.Qg6?
- threat
- 2.Qf5#
- 2.Qf6#
- 2.Qxh6#
- 1...Qb6
- 2.Qf5#
- 1...Qa6
- 2.Qf5#
- 1...Qd7
- 2.Qxh6#
- 1...Qe7
- 2.Qf5#
- 1...Qf7
- 2.Qxf7#
- 1...Qg7
- 2.Qf5#
- 1...Rd6
- 2.Qf5#
- 1...Bg5
- 2.Qf5#
- 2.Qxg5#
- 1...Bg7
- 2.Qf5#
- 2.Qg5#
- 1...Bf8
- 2.Qf5#
- 2.Qg5#
- 2.Qf6#
- 1...e3
- 2.Rf3#
- 2.Qf5#
- 1...Qh7!
- threat
- 1.Qf8+?
- 1...Qf7+
- 2.Qxf7#
- 1...Bxf8!
- 1...Qf7+
- 1.Qe6?
- Keys
- 1.Qc4!
- threat
- 2.Rf3#
- 1...Qf7+
- 2.Qxf7#
- 1...Qf2
- 2.Qf7#
- 1...Qe3
- 2.Qf7#
- 1...Qd4
- 2.Qf7#
- 1...Qa3
- 2.Qf7#
- 1...Rf2
- 2.Sd3#
- 1...Rh2
- 2.Sd3#
- 1...Rd3
- 2.Sxd3#
- 1...Rd4
- 2.Qf1#
- threat
- 1.Qc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 9
- Sets
- Q(f);N_GUARD::QAR(E)
- Q(f);CHECK,N_GUARD::QAR(E),XQ(f)
- B(e);N_GUARD::QAB1(E),XB(e)
- B(e);N_GUARD::QAB1(E)
- Tries
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(f);CHECK,N_GUARD::QAR(E),XQ(f)
- P(b);::QAR1(E)
- Q(f);::QAR1(E)
- Q(f);::QAB(E),XB(e)
- R(a);::QAR1(E)
- B(e);::QAR1(E)
- Refutation
- Q(f);
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,N_GUARD::QAR(E),XQ(f)
- Q(f);::QAR1(E)
- Q(f);::QAB(E),XB(e)
- R(a);::QAR1(E)
- B(e);::QAR1(E)
- Refutation
- Q(f);XQ(E)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(f);::QAR1(E)
- Q(f);::QAB(E),XB(e)
- Q(f);N_GUARD,P_PINQ(E)::QAR(E),XQ(f)
- R(a);::QAR1(E)
- Refutation
- Q(f);
- Try
- Q(E);CHECK
- Vars
- Q(f);CHECK,N_GUARD,P_SPINQ(f)::QAR(E),XQ(f)
- Refutation
- B(e);XQ(E)
- Try
- Actual
- Q(E);P_PINP(b)
- Threat
- R1(B)
- Vars
- Q(f);CHECK,N_GUARD::QAR(E),XQ(f)
- Q(f);N_GUARD::QAR(E)
- Q(f);N_GUARD,N_SPINP(b)::QAR(E)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD,P_PINR(B)::S(A)
- R(a);N_GUARD::S(A),XR(a)
- R(a);N_GUARD,N_SPINP(b),S_CUTQ(f)::QAR(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).