MESON Chess Problem Database
Problem Display
PID: 27338 (3K4/1B6/8/8/4N1R1/7p/5Pqk/2Q5 w - - 0 1)
Lebeck, Donald
Mate in Two!! (Lebeck), 1992
#2
6 + 3
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Qf4#
- 2.Qc7#
- 1...Qf3
- 2.Qg1#
- 1...Qxe4
- 2.Qg1#
- 1...Qg1
- 2.Qxg1#
- 1...Qh1
- Tries
- 1.Sd2?
- 1...Qxb7
- 2.Qg1#
- 1...Qxf2
- 2.Qh1#
- 1...Qxg4
- 2.Qh1#
- 1...Qf1
- 2.Sxf1#
- 2.Qc7#
- 1...Qh1
- 2.Qxh1#
- 2.Qc7#
- 1...Qf3
- 2.Sxf3#
- 2.Qg1#
- 1...Qe4
- 2.Qg1#
- 1...Qc6
- 2.Qg1#
- 1...Qg1
- 2.Qxg1#
- 1...Qg3
- 2.Qh1#
- 1...Qd5+!
- 1...Qxb7
- 1.Sc3?
- 1...Qxb7
- 2.Qg1#
- 1...Qxf2
- 2.Qh1#
- 1...Qxg4
- 2.Qh1#
- 1...Qf1
- 2.Qf4#
- 1...Qh1
- 2.Qf4#
- 2.Qxh1#
- 1...Qf3
- 2.Qg1#
- 1...Qe4
- 2.Qg1#
- 1...Qc6
- 2.Qg1#
- 1...Qg1
- 2.Qxg1#
- 1...Qg3
- 2.Qh1#
- 1...Qd5+!
- 1...Qxb7
- 1.Sc5?
- 1...Qxb7
- 2.Qg1#
- 1...Qxf2
- 2.Qh1#
- 1...Qxg4
- 2.Qh1#
- 1...Qf1
- 2.Qf4#
- 1...Qh1
- 2.Qf4#
- 2.Qxh1#
- 1...Qf3
- 2.Qg1#
- 1...Qe4
- 2.Qg1#
- 1...Qc6
- 2.Qg1#
- 1...Qg1
- 2.Qxg1#
- 1...Qg3
- 2.Qh1#
- 1...Qd5+!
- 1...Qxb7
- 1.Sg5?
- 1...Qxb7
- 2.Qg1#
- 1...Qxf2
- 2.Qh1#
- 1...Qxg4
- 2.Qh1#
- 1...Qf1
- 2.Qf4#
- 2.Qc7#
- 1...Qh1
- 2.Qf4#
- 2.Qxh1#
- 2.Qc7#
- 1...Qf3
- 2.Sxf3#
- 2.Qg1#
- 1...Qe4
- 2.Qg1#
- 1...Qc6
- 2.Qg1#
- 1...Qg1
- 2.Qxg1#
- 1...Qg3
- 2.Qh1#
- 1...Qd5+!
- 1...Qxb7
- 1.Sf6?
- 1...Qxb7
- 2.Qg1#
- 1...Qxf2
- 2.Qh1#
- 1...Qxg4
- 2.Sxg4#
- 2.Qh1#
- 1...Qf1
- 2.Qf4#
- 2.Qc7#
- 1...Qh1
- 2.Qf4#
- 2.Qxh1#
- 2.Qc7#
- 1...Qf3
- 2.Qg1#
- 1...Qe4
- 2.Qg1#
- 1...Qc6
- 2.Qg1#
- 1...Qg1
- 2.Qxg1#
- 1...Qg3
- 2.Qh1#
- 1...Qd5+!
- 1...Qxb7
- 1.Sd2?
- Keys
- 1.Sd6!
- 1...Qxb7
- 2.Qg1#
- 1...Qxf2
- 2.Qh1#
- 1...Qxg4
- 2.Qh1#
- 1...Qf1
- 2.Qf4#
- 1...Qh1
- 2.Qf4#
- 2.Qxh1#
- 1...Qf3
- 2.Qg1#
- 1...Qe4
- 2.Qg1#
- 1...Qd5
- 2.Qg1#
- 1...Qc6
- 2.Qg1#
- 1...Qg1
- 2.Qxg1#
- 1...Qg3
- 2.Qh1#
- 1...Qxb7
- 1.Sd6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_GUARD,XS(C)::QAB1(A)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Tries
- Try
- S(C);
- Vars
- Q(a);N_GUARD,XB(E)::QAB1(A)
- Q(a);N_GUARD,XP(B)::QAR1(A)
- Q(a);N_GUARD,XR(D)::QAR1(A)
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Q(a);N_GUARD::QAR1(A)
- Refutation
- Q(a);CHECK
- Try
- S(C);
- Vars
- Q(a);N_GUARD,XB(E)::QAB1(A)
- Q(a);N_GUARD,XP(B)::QAR1(A)
- Q(a);N_GUARD,XR(D)::QAR1(A)
- Q(a);N_GUARD::QAB(A)
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Q(a);N_GUARD::QAR1(A)
- Refutation
- Q(a);CHECK
- Try
- S(C);
- Vars
- Q(a);N_GUARD,XB(E)::QAB1(A)
- Q(a);N_GUARD,XP(B)::QAR1(A)
- Q(a);N_GUARD,XR(D)::QAR1(A)
- Q(a);N_GUARD::QAB(A)
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Q(a);N_GUARD::QAR1(A)
- Refutation
- Q(a);CHECK
- Try
- S(C);
- Vars
- Q(a);N_GUARD,XB(E)::QAB1(A)
- Q(a);N_GUARD,XP(B)::QAR1(A)
- Q(a);N_GUARD,XR(D)::QAR1(A)
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Q(a);N_GUARD::QAR1(A)
- Refutation
- Q(a);CHECK
- Try
- S(C);
- Vars
- Q(a);N_GUARD,XB(E)::QAB1(A)
- Q(a);N_GUARD,XP(B)::QAR1(A)
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Q(a);N_GUARD::QAR1(A)
- Refutation
- Q(a);CHECK
- Try
- Actual
- S(C);
- Vars
- Q(a);N_GUARD,XB(E)::QAB1(A)
- Q(a);N_GUARD,XP(B)::QAR1(A)
- Q(a);N_GUARD,XR(D)::QAR1(A)
- Q(a);N_GUARD::QAB(A)
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_GUARD,P_PINS(C)::QAB1(A)
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Q(a);N_GUARD::QAR1(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).