MESON Chess Problem Database
Problem Display
PID: 27665 (3Q4/8/q4b2/2nP1k1K/3P2R1/8/8/8 w - - 0 1)
Lebeck, Donald
Mate in Two!! (Lebeck), 1992
#2
5 + 4
SOLUTION
- SOUND
- Sets
- 1...Bxd4
- 2.Qg5#
- 1...Be5
- 2.Qg5#
- 1...Bg5
- 2.Qxg5#
- 1...Bg7
- 2.Qg5#
- 1...Bh8
- 2.Qg5#
- 1...Bxd4
- Tries
- 1.Qd7+?
- 1...Qe6
- 2.Qh7#
- 1...Se6
- 2.Qh7#
- 1...Sxd7!
- 1...Qe6
- 1.Qd7+?
- Keys
- 1.Qc7!
- threat
- 2.Rf4#
- 2.Qf4#
- 2.Qh7#
- 1...Bxd4
- 2.Rf4#
- 2.Qf4#
- 1...Bh4
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Be5
- 2.Qxe5#
- 1...Bg5
- 2.Qe5#
- 1...Be7
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Bg7
- 2.Rf4#
- 2.Qf4#
- 1...Bd8
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Bh8
- 2.Rf4#
- 2.Qf4#
- 1...Qf1
- 2.Qh7#
- 1...Qe2
- 2.Qf4#
- 2.Qh7#
- 1...Qb7
- 2.Rf4#
- 2.Qf4#
- 1...Qd6
- 2.Qh7#
- 1...Qa7
- 2.Rf4#
- 2.Qf4#
- 1...Sd3
- 2.Qh7#
- 1...Se6
- 2.Qh7#
- 1...Sd7
- 2.Rf4#
- 2.Qf4#
- threat
- 1.Qc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- B(d);OGATE,XP(A)::QAR1(E)
- B(d);OGATE::QAR1(E)
- B(d);OGATE::QAR1(E),XB(d)
- Tries
- Try
- Q(E);CHECK
- Vars
- Q(c);P_SPINQ(c)::QAB(E)
- S(a);P_SPINS(a)::QAB(E)
- Refutation
- S(a);XQ(E)
- Try
- Actual
- Q(E);
- Threat
- DUALS(3)
- Vars
- B(d);N_GUARD::QAR1(E),XB(d)
- B(d);N_GUARD::QAR1(E)
- Q(c);::QAB(E)
- S(a);::QAB(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).