MESON Chess Problem Database
Problem Display
PID: 46681 (nq6/Q6p/3P1N2/2P1B3/8/2R1pk2/2R4K/8 w - - 0 1)
Ugren, Ljubomir
The Problemist, 2003
#2
8 + 5
SOLUTION
- SOUND
- Sets
- 1...Qb7
- 2.Qxb7#
- 1...Qd8
- 2.Qb7#
- 1...Qf8
- 2.Qb7#
- 1...Qh8
- 2.Qb7#
- 1...Qb7
- Tries
- 1.Qa1?
- threat
- 2.Qd1#
- 2.Qf1#
- 2.Qh1#
- 1...Qxd6
- 2.Qf1#
- 2.Qh1#
- 1...Qb5
- 2.Qh1#
- 1...Qg8
- 2.Qd1#
- 2.Qf1#
- 1...Qb1!
- threat
- 1.Qa4?
- threat
- 2.Qc6#
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Qxd6
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Qb3
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Qc7
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Qb5
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Qb6
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Qb7
- 2.Qf4#
- 2.Qg4#
- 1...Qc8
- 2.Qe4#
- 2.Qf4#
- 1...Qe8
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Qg8
- 2.Qe4#
- 2.Qf4#
- 1...Sb6
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Sc7
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...h5
- 2.Qc6#
- 2.Qe4#
- 2.Qf4#
- 1...Qb4!
- threat
- 1.Qa6?
- threat
- 2.Qf1#
- 2.Qe2#
- 2.Qc6#
- 1...Qxd6
- 2.Qf1#
- 2.Qe2#
- 1...Qb3
- 2.Qf1#
- 2.Qe2#
- 1...Qc7
- 2.Qf1#
- 2.Qe2#
- 1...Qb1
- 2.Qe2#
- 2.Qc6#
- 1...Qb4
- 2.Qf1#
- 2.Qe2#
- 1...Qb6
- 2.Qf1#
- 2.Qe2#
- 1...Qb7
- 2.Qf1#
- 2.Qe2#
- 2.Qxb7#
- 1...Qc8
- 2.Qf1#
- 2.Qe2#
- 1...Qe8
- 2.Qf1#
- 2.Qe2#
- 1...Qg8
- 2.Qf1#
- 2.Qe2#
- 1...Sb6
- 2.Qf1#
- 2.Qe2#
- 1...Sc7
- 2.Qf1#
- 2.Qe2#
- 1...Qb5!
- threat
- 1.Qd7?
- threat
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 2.Qc6#
- 1...Qxd6
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...Qb3
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...Qc7
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...Qb4
- 2.Qh3#
- 1...Qb5
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...Qb6
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...Qb7
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 2.Qxb7#
- 1...Qe8
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...Qg8
- 2.Qf5#
- 1...Sb6
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...Sc7
- 2.Qh3#
- 2.Qg4#
- 2.Qf5#
- 1...h5
- 2.Qh3#
- 2.Qf5#
- 2.Qc6#
- 1...Qc8!
- threat
- 1.Qg7?
- threat
- 2.Qg2#
- 2.Qg3#
- 2.Qg4#
- 1...Qb4
- 2.Qg2#
- 2.Qg3#
- 1...Qc8
- 2.Qg2#
- 2.Qg3#
- 1...h5
- 2.Qg2#
- 2.Qg3#
- 1...Qg8!
- threat
- 1.Qxh7?
- threat
- 2.Qe4#
- 2.Qf5#
- 2.Qh3#
- 2.Qh5#
- 1...Qb4
- 2.Qh3#
- 1...Qb7
- 2.Qf5#
- 2.Qh3#
- 2.Qh5#
- 2.Qxb7#
- 1...Qc8
- 2.Qe4#
- 1...Qe8
- 2.Qe4#
- 2.Qf5#
- 2.Qh3#
- 1...Qg8
- 2.Qe4#
- 2.Qf5#
- 1...Qh8!
- threat
- 1.Qxa8+?
- 1...Qb7
- 2.Qxb7#
- 1...Qxa8!
- 1...Qb7
- 1.Qa1?
- Keys
- 1.Qa2!
- threat
- 2.Rf2#
- 2.Qd5#
- 1...Qxd6
- 2.Rf2#
- 1...Qb2
- 2.Qd5#
- 1...Qb3
- 2.Rf2#
- 1...Qb4
- 2.Rf2#
- 1...Qb7
- 2.Rf2#
- 1...Qg8
- 2.Rf2#
- 1...Sb6
- 2.Rf2#
- 1...Sc7
- 2.Rf2#
- threat
- 1.Qa2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 3
- Sets
- Q(e);N_GUARD::QAB(H),XQ(e)
- Q(e);N_GUARD::QAB(H)
- Tries
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- Q(e);::QAB(H)
- Refutation
- Q(e);
- Try
- Q(H);
- Threat
- DUALS(4)
- Refutation
- Q(e);
- Try
- Q(H);
- Threat
- DUALS(3)
- Refutation
- Q(e);
- Try
- Q(H);
- Threat
- DUALS(4)
- Vars
- Q(e);::QAR2(H)
- Refutation
- Q(e);
- Try
- Q(H);
- Threat
- DUALS(3)
- Refutation
- Q(e);
- Try
- Q(H);XP(c)
- Threat
- DUALS(4)
- Vars
- Q(e);::QAR2(H)
- Q(e);::QAB1(H)
- Refutation
- Q(e);P_PINQ(H)
- Try
- Q(H);CHECK,XS(d)
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::QAB(H),XQ(e)
- Refutation
- Q(e);XQ(H)
- Try
- Actual
- Q(H);
- Threat
- DUALS(2)
- Vars
- Q(e);P_PINB(E),XP(F)::R1(A)
- Q(e);P_PINR(A)::QAB(H)
- Q(e);::R1(A)
- S(d);::R1(A)
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).