MESON Chess Problem Database
Problem Display
PID: 249637 (4K1N1/8/2Q3B1/2n5/3p1p2/4k3/6R1/8 w - - 0 1)
Lokker, Miklosh S
Stella Polaris, 1969
#2
5 + 4
SOLUTION
- SOUND
- Sets
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sb3
- Tries
- 1.Sf6?
- threat
- 2.Sg4#
- 1...Se4
- 2.Qxe4#
- 1...f3
- 2.Sd5#
- 1...d3!
- threat
- 1.Sh6?
- threat
- 2.Sg4#
- 1...Se4
- 2.Qxe4#
- 1...d3
- 2.Sf5#
- 1...f3!
- threat
- 1.Bf5?
- 1...Se4
- 2.Qxe4#
- 1...f3
- 2.Qh6#
- 1...Sd3
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...d3!
- 1...Se4
- 1.Bh7?
- 1...Se4
- 2.Qxe4#
- 1...f3
- 2.Qh6#
- 1...Sd3
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...d3!
- 1...Se4
- 1.Qd5?
- 1...Se4
- 2.Qxe4#
- 1...f3
- 2.Qg5#
- 1...Sd3
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...d3!
- 1...Se4
- 1.Qxc5?
- 1...f3
- 2.Qc1#
- 2.Qe5#
- 2.Qg5#
- 1...Kf3!
- 1...f3
- 1.Qe6+?
- 1...Kf3
- 2.Qh3#
- 2.Qe2#
- 1...Se4
- 2.Qxe4#
- 1...Sxe6!
- 1...Kf3
- 1.Sf6?
- Keys
- 1.Se7!
- 1...Se4
- 2.Qxe4#
- 1...d3
- 2.Sf5#
- 1...f3
- 2.Sd5#
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Sf5#
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Se4
- 1.Se7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- S(d);N_GUARD::QAR1(B)
- S(d);N_GUARD::QAR1(B),XS(d)
- Tries
- Try
- S(E);
- Threat
- S(E)
- Vars
- S(d);N_GUARD::QAR1(B),XS(d)
- P(c);SBLOCK::S(E)
- Refutation
- P(b);
- Try
- S(E);
- Threat
- S(E)
- Vars
- S(d);N_GUARD::QAR1(B),XS(d)
- P(b);SBLOCK::S(E)
- Refutation
- P(c);
- Try
- B(C);
- Vars
- S(d);N_GUARD::QAR1(B),XS(d)
- P(c);OGATEB,SBLOCK::QAB(B)
- S(d);N_GUARD::QAR1(B)
- Refutation
- P(b);
- Try
- B(C);
- Vars
- S(d);N_GUARD::QAR1(B),XS(d)
- P(c);OGATEB,SBLOCK::QAB(B)
- S(d);N_GUARD::QAR1(B)
- Refutation
- P(b);
- Try
- Q(B);
- Vars
- S(d);N_GUARD::QAR1(B),XS(d)
- P(c);OGATEB,SBLOCK::QAB(B)
- S(d);N_GUARD::QAR1(B)
- Refutation
- P(b);
- Try
- Q(B);P_PINP(b),XS(d)
- Refutation
- K(a);N_SPINP(b),P-FLIGHT
- Try
- Q(B);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAR1(B),XS(d)
- Refutation
- S(d);XQ(B)
- Try
- Actual
- S(E);
- Vars
- S(d);N_GUARD::QAR1(B),XS(d)
- P(b);SBLOCK::S(E)
- P(c);SBLOCK::S(E)
- S(d);N_GUARD::QAR1(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).