MESON Chess Problem Database
Problem Display
PID: 23880 (8/8/2Q5/R2N4/4n3/1k6/1n6/K7 w - - 0 1)
Lincoln, Robert A
Fun with Chess Miniatures, 1996
#2
4 + 3
| 3713 | Snap | 2009 |
| 5454 | Near Snap | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...Sc4
- 2.Qa4#
- 1...Sd2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sg3
- 2.Qc3#
- 1...Sg5
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...Sf6
- 2.Qc3#
- 1...Sd1
- Tries
- 1.Kb1?
- threat
- 2.Qb5#
- 2.Qc2#
- 1...Sc3+
- 2.Qxc3#
- 1...Sa4
- 2.Qxa4#
- 1...Sc5
- 2.Qb5#
- 1...Sd3
- 2.Qa4#
- 2.Qc2#
- 1...Sc4
- 2.Qa4#
- 2.Qb5#
- 1...Sd6
- 2.Qc2#
- 2.Qc3#
- 1...Sd2+!
- threat
- 1.Ra2?
- 1...Sc3
- 2.Qxc3#
- 1...Sd1
- 2.Qa4#
- 2.Qb5#
- 2.Qc2#
- 1...Sd3
- 2.Qa4#
- 2.Qc2#
- 1...Sa4
- 2.Qxa4#
- 2.Qb5#
- 2.Qc2#
- 1...Sc4
- 2.Qa4#
- 2.Qb5#
- 1...Sd2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sg3
- 2.Qc3#
- 1...Sg5
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...Sf6
- 2.Qc3#
- 1...Sc5!
- 1...Sc3
- 1.Rb5+?
- 1...Ka4
- 2.Qa6#
- 1...Ka3!
- 1...Ka4
- 1.Ra6?
- 1...Sa4
- 2.Qxa4#
- 1...Sc4
- 2.Qa4#
- 1...Sc3
- 2.Qxc3#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sd2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sg3
- 2.Qc3#
- 1...Sg5
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...Sf6
- 2.Qc3#
- 1...Sc5!
- 1...Sa4
- 1.Ra7?
- 1...Sa4
- 2.Qxa4#
- 1...Sc4
- 2.Qa4#
- 1...Sc3
- 2.Qxc3#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sd2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sg3
- 2.Qc3#
- 1...Sg5
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...Sf6
- 2.Qc3#
- 1...Sc5!
- 1...Sa4
- 1.Ra8?
- 1...Sa4
- 2.Qxa4#
- 1...Sc4
- 2.Qa4#
- 1...Sc3
- 2.Qxc3#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sd2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sg3
- 2.Qc3#
- 1...Sg5
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...Sf6
- 2.Qc3#
- 1...Sc5!
- 1...Sa4
- 1.Kb1?
- Keys
- 1.Qc1!
- 1...Sc3
- 2.Qxc3#
- 1...Sd1
- 2.Ra3#
- 1...Sd3
- 2.Ra3#
- 1...Sa4
- 2.Rb5#
- 1...Sc4
- 2.Qd1#
- 1...Sd2
- 2.Qc3#
- 1...Sf2
- 2.Qc3#
- 1...Sg3
- 2.Qc3#
- 1...Sc5
- 2.Qc3#
- 1...Sg5
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...Sf6
- 2.Qc3#
- 1...Sc3
- 1.Qc1!
Anticipated by 132651(1957), 234101(1988-1990)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- S(c);N_GUARD::QAR1(D)
- S(c);N_GUARD::QAR1(D),XS(c)
- Tries
- Try
- K(A);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- S(c);CHECK,N_GUARD::QAR1(D),XS(c)
- S(a);N_GUARD::QAB1(D),XS(a)
- S(c);::QAR2(D)
- Refutation
- S(c);CHECK
- Try
- R(B);
- Vars
- S(c);N_GUARD::QAR1(D),XS(c)
- S(c);N_GUARD::QAR1(D)
- Refutation
- S(c);
- Try
- R(B);CHECK
- Vars
- K(b);S_FLIGHT::QAR2(D)
- Refutation
- K(b);P-FLIGHT
- Try
- R(B);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(a);N_GUARD::QAB1(D)
- S(c);N_GUARD::QAR1(D),XS(c)
- S(c);N_GUARD::QAR1(D)
- Refutation
- S(c);
- Try
- R(B);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(a);N_GUARD::QAB1(D)
- S(c);N_GUARD::QAR1(D),XS(c)
- S(c);N_GUARD::QAR1(D)
- Refutation
- S(c);
- Try
- R(B);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(a);N_GUARD::QAB1(D)
- S(c);N_GUARD::QAR1(D),XS(c)
- S(c);N_GUARD::QAR1(D)
- Refutation
- S(c);
- Try
- Actual
- Q(D);
- Vars
- S(c);N_GUARD::QAR1(D),XS(c)
- S(a);::R1(B)
- S(a);SBLOCK::R(B)
- S(a);N_GUARD,SBLOCK::QAB(D)
- S(c);N_GUARD::QAR1(D)
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).