MESON Chess Problem Database
Problem Display
PID: 187643 (8/5K2/2pp3p/2k4p/1R2Q3/1n6/1n6/8 w - - 0 1)
Elkhan, Alexander A
Revue d'Echecs, 1909
#2
3 + 7
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa5
- 2.Qd4#
- 1...d5
- 2.Qe7#
- 1...Sd1
- Tries
- 1.Kf6?
- 1...Sc4
- 2.Qxc4#
- 1...Sd4
- 2.Qxd4#
- 1...d5
- 2.Qe7#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...h4!
- 1...Sc4
- 1.Kg6?
- 1...Sc4
- 2.Qxc4#
- 1...Sd4
- 2.Qxd4#
- 1...d5
- 2.Qe7#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...h4!
- 1...Sc4
- 1.Kg7?
- 1...Sc4
- 2.Qxc4#
- 1...Sd4
- 2.Qxd4#
- 1...d5
- 2.Qe7#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...h4!
- 1...Sc4
- 1.Ke8?
- 1...Sc4
- 2.Qxc4#
- 1...Sd4
- 2.Qxd4#
- 1...d5
- 2.Qe7#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...h4!
- 1...Sc4
- 1.Kf8?
- 1...Sc4
- 2.Qxc4#
- 1...Sd4
- 2.Qxd4#
- 1...d5
- 2.Qe7#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...h4!
- 1...Sc4
- 1.Kg8?
- 1...Sc4
- 2.Qxc4#
- 1...Sd4
- 2.Qxd4#
- 1...d5
- 2.Qe7#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...h4!
- 1...Sc4
- 1.Qc2+?
- 1...Kd5
- 2.Qf5#
- 1...Sc4
- 2.Qxc4#
- 1...Kxb4!
- 1...Kd5
- 1.Kf6?
- Keys
- 1.Qh4!
- 1...Kd5
- 2.Qxh5#
- 1...Sc4
- 2.Qxc4#
- 1...Sd4
- 2.Qxd4#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...d5
- 2.Qe7#
- 1...Kd5
- 1.Qh4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAR1(B)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(f);OGATEB,SBLOCK::QAB(B)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(f);OGATEB,SBLOCK::QAB(B)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAB1(B)
- Refutation
- P(d);
- Try
- K(C);S_FLIGHT
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(f);OGATEB,SBLOCK::QAB(B)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAB1(B)
- Refutation
- P(d);
- Try
- K(C);P-FLIGHT
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(f);OGATEB,SBLOCK::QAB(B)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAB1(B)
- Refutation
- P(d);
- Try
- K(C);S_FLIGHT
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(f);OGATEB,SBLOCK::QAB(B)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAB1(B)
- Refutation
- P(d);
- Try
- K(C);P-FLIGHT
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(f);OGATEB,SBLOCK::QAB(B)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAB1(B)
- Refutation
- P(d);
- Try
- K(C);S_FLIGHT
- Vars
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(f);OGATEB,SBLOCK::QAB(B)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAB1(B)
- Refutation
- P(d);
- Try
- Q(B);CHECK
- Vars
- K(c);P-FLIGHT::QAR2(B)
- S(a);N_GUARD,P_SPINS(a)::QAR1(B),XS(a)
- Refutation
- K(c);S_FLIGHT,XR(A)
- Try
- Actual
- Q(B);
- Vars
- K(c);P-FLIGHT::QAR(B),XP(d)
- S(a);N_GUARD::QAR1(B),XS(a)
- S(b);N_GUARD::QAB1(B),XS(b)
- S(a);N_GUARD::QAR1(B)
- S(b);N_GUARD::QAB1(B)
- P(f);OGATEB,SBLOCK::QAB(B)
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).