MESON Chess Problem Database
Problem Display
PID: 73696 (8/3Q1p2/8/1n6/5K2/3N1N2/3pkp2/R3r2R w - - 0 1)
Postma, Eelke
Tijdschrift vd KNSB, 1938
#2
6 + 6
SOLUTION
- SOUND
- Sets
- 1...d1S
- 2.Sc1#
- 1...d1B
- 2.Sc1#
- 1...f1S
- 2.Sg1#
- 1...f1B
- 2.Sg1#
- 1...d1S
- Tries
- 1.Sb2?
- threat
- 2.Qxb5#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...f1Q
- 2.Qxd2#
- 1...f1B
- 2.Qxd2#
- 1...f1R
- 2.Qxd2#
- 1...d1Q
- 2.Qe8#
- 2.Qe7#
- 1...d1S
- 2.Qxb5#
- 2.Qd2#
- 2.Qd3#
- 1...d1B
- 2.Qxb5#
- 2.Qe8#
- 2.Qd2#
- 2.Qd3#
- 2.Qe7#
- 1...d1R
- 2.Qe8#
- 2.Qe7#
- 1...Rc1
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Rd1
- 2.Qxb5#
- 2.Qe8#
- 2.Qd3#
- 2.Qe7#
- 1...Sa3
- 2.Sd4#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Sc3
- 2.Sd4#
- 2.Qxd2#
- 2.Qd3#
- 1...Sd4
- 2.Sxd4#
- 1...Sd6
- 2.Sd4#
- 1...Sa7
- 2.Sd4#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Sc7
- 2.Sd4#
- 2.Qxd2#
- 2.Qd3#
- 1...f1S!
- threat
- 1.Sb4?
- threat
- 2.Qxb5#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...f1Q
- 2.Qxd2#
- 1...f1B
- 2.Qxd2#
- 1...f1R
- 2.Qxd2#
- 1...d1Q
- 2.Qe8#
- 2.Qe7#
- 1...d1S
- 2.Qxb5#
- 2.Qd2#
- 2.Qd3#
- 1...d1B
- 2.Qxb5#
- 2.Qe8#
- 2.Qd2#
- 2.Qd3#
- 2.Qe7#
- 1...d1R
- 2.Qe8#
- 2.Qe7#
- 1...Rc1
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Rd1
- 2.Qxb5#
- 2.Qe8#
- 2.Qd3#
- 2.Qe7#
- 1...Sa3
- 2.Sd4#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Sc3
- 2.Sd4#
- 2.Qxd2#
- 2.Qd3#
- 1...Sd4
- 2.Sxd4#
- 1...Sd6
- 2.Sd4#
- 1...Sa7
- 2.Sd4#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Sc7
- 2.Sd4#
- 2.Qxd2#
- 2.Qd3#
- 1...f1S!
- threat
- 1.Sc5?
- threat
- 2.Qxb5#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...f1Q
- 2.Qxd2#
- 1...f1B
- 2.Qxd2#
- 1...f1R
- 2.Qxd2#
- 1...d1Q
- 2.Qe8#
- 2.Qe7#
- 1...d1S
- 2.Qxb5#
- 2.Qd2#
- 2.Qd3#
- 1...d1B
- 2.Qxb5#
- 2.Qe8#
- 2.Qd2#
- 2.Qd3#
- 2.Qe7#
- 1...d1R
- 2.Qe8#
- 2.Qe7#
- 1...Rb1
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Rc1
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Rd1
- 2.Qxb5#
- 2.Qe8#
- 2.Qd3#
- 2.Qe7#
- 1...Sa3
- 2.Sd4#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Sc3
- 2.Sd4#
- 2.Qxd2#
- 2.Qd3#
- 1...Sd4
- 2.Sxd4#
- 1...Sd6
- 2.Sd4#
- 1...Sa7
- 2.Sd4#
- 2.Qe8#
- 2.Qxd2#
- 2.Qd3#
- 2.Qe7#
- 1...Sc7
- 2.Sd4#
- 2.Qxd2#
- 2.Qd3#
- 1...f1S!
- threat
- 1.Qd4?
- threat
- 2.Qe3#
- 2.Qe4#
- 1...d1S
- 2.Sc1#
- 1...f1S
- 2.Sg1#
- 1...Sc3
- 2.Qe3#
- 1...Sd6
- 2.Qe3#
- 1...f5
- 2.Qe3#
- 1...Sxd4!
- threat
- 1.Sb2?
- Keys
- 1.Qf5!
- threat
- 2.Qe4#
- 1...d1S
- 2.Sc1#
- 1...f1S
- 2.Sg1#
- 1...Sc3
- 2.Sd4#
- 1...Sd6
- 2.Sd4#
- threat
- 1.Qf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- P(b);N_GUARD,S_CUTR(a)::S(C)
- P(d);N_GUARD,SBLOCK,S_CUTR(a)::S(D)
- Tries
- Try
- S(C);
- Threat
- DUALS(5)
- Vars
- P(d);P_PINS(D)::QAR1(F),XP(b)
- P(d);::QAR1(F),XP(b)
- S(e);N_GUARD::S(D),XS(e)
- S(e);N_GUARD::S(D)
- Refutation
- P(d);
- Try
- S(C);
- Threat
- DUALS(5)
- Vars
- P(d);P_PINS(D)::QAR1(F),XP(b)
- P(d);::QAR1(F),XP(b)
- S(e);N_GUARD::S(D),XS(e)
- S(e);N_GUARD::S(D)
- Refutation
- P(d);
- Try
- S(C);
- Threat
- DUALS(5)
- Vars
- P(d);P_PINS(D)::QAR1(F),XP(b)
- P(d);::QAR1(F),XP(b)
- S(e);N_GUARD::S(D),XS(e)
- S(e);N_GUARD::S(D)
- Refutation
- P(d);
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- P(b);N_GUARD,S_CUTR(a)::S(C)
- P(d);N_GUARD,SBLOCK,S_CUTR(a)::S(D)
- S(e);::QAR1(F)
- P(f);::QAR1(F)
- Refutation
- S(e);XQ(F)
- Try
- Actual
- Q(F);
- Threat
- QAR2(F)
- Vars
- P(b);N_GUARD,SBLOCK,S_CUTR(a)::S(C)
- P(d);N_GUARD,SBLOCK,S_CUTR(a)::S(D)
- S(e);N_GUARD::S(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).