MESON Chess Problem Database
Problem Display
PID: 249368 (K7/pp2Nn2/6pp/2p3n1/1q2k2r/r1Qp1N2/2B1PP2/1bB5 w - - 0 1)
Dittrich, Stefan
2nd HM., Schakend Nederland, 1982
#2
8 + 13
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qa5
- 2.Qc4#
- 1...Qc4
- 2.Qxc4#
- 1...Qb6
- 2.Qc4#
- 1...Ra1
- 2.Qxd3#
- 1...Ra2
- 2.Qxd3#
- 1...Ra4
- 2.Qxd3#
- 1...Ra5
- 2.Qxd3#
- 1...Ra6
- 2.Qxd3#
- 1...Rf4
- 2.Sd2#
- 1...Ba2
- 2.Bxd3#
- 1...Sxf3
- 2.exd3#
- 1...Se5
- 2.Qxe5#
- 1...Sd6
- 2.Qe5#
- 1...Sd8
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- 1...c4
- 2.Qd4#
- 1...Qa5
- Tries
- 1.Sxg5+?
- 1...hxg5
- 2.f3#
- 1...Sxg5!
- 1...hxg5
- 1.Qxb4+?
- 1...c4
- 2.Qxc4#
- 2.Qxb7#
- 1...cxb4!
- 1...c4
- 1.Qxc5?
- threat
- 2.Qe3#
- 2.Qxb4#
- 2.Qd5#
- 1...Sxf3
- 2.Qe3#
- 2.Qd5#
- 1...dxc2
- 2.Qxb4#
- 2.Qd5#
- 1...Qd2
- 2.Qd4#
- 2.Qc4#
- 1...Qe1
- 2.Qe3#
- 2.Qd4#
- 2.Qc4#
- 2.Qd5#
- 1...Qc3
- 2.Qe3#
- 2.Qd5#
- 1...Qa5
- 2.Qe3#
- 2.Qd4#
- 2.Qc4#
- 1...Qb2
- 2.Qe3#
- 2.Qd5#
- 1...Qb3
- 2.Qe3#
- 2.Qd4#
- 1...Qa4
- 2.Qe3#
- 2.Qd5#
- 1...Qc4
- 2.Qe3#
- 2.Qxc4#
- 1...Qd4
- 2.Qxd4#
- 1...Qb5
- 2.Qe3#
- 2.Qd4#
- 1...Qb6
- 2.Qd5#
- 1...Rb3
- 2.Qe3#
- 2.Qd5#
- 1...Rc3
- 2.Qe3#
- 2.Qd5#
- 1...Ra4
- 2.Qe3#
- 2.Qd5#
- 1...Ra5
- 2.Qe3#
- 2.Qxb4#
- 1...Ba2
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 2.Qd5#
- 1...Se5
- 2.Qe3#
- 2.Qd5#
- 2.Qxe5#
- 1...Sd6
- 2.Qe3#
- 2.Qd5#
- 2.Qe5#
- 1...a5
- 2.Qe3#
- 2.Qd5#
- 1...Qxc5!
- threat
- 1.Sxg5+?
- Keys
- 1.Qf6!
- threat
- 2.Qxg6#
- 1...Sxf3
- 2.exf3#
- 1...Qd2
- 2.Sxd2#
- 1...Qb6
- 2.Sd2#
- 1...Ra6
- 2.exd3#
- 1...Rf4
- 2.Qxf4#
- 1...Se5
- 2.Qxe5#
- 1...Sd6
- 2.Qe5#
- 1...Sh8
- 2.Qe5#
- threat
- 1.Qf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- Q(d);N_GUARD::QAR2(E)
- Q(d);N_GUARD::QAR2(E),XQ(d)
- R(b);N_GUARD::QAB1(E),XP(c)
- R(f);SBLOCK::S(F)
- B(a);N_GUARD::B(B),XP(c)
- S(h);SBLOCK,XS(F)::P(C),XP(c)
- S(m);N_GUARD::QAR1(E),XS(m)
- S(m);N_GUARD::QAR1(E)
- P(g);N_GUARD,S_CUTQ(d)::QAR1(E)
- Tries
- Try
- S(F);CHECK,XS(h)
- Vars
- P(j);XS(F)::P(D)
- Refutation
- S(m);XS(F)
- Try
- Q(E);CHECK,XQ(d)
- Refutation
- P(g);XQ(E)
- Try
- Q(E);XP(g)
- Threat
- DUALS(3)
- Vars
- Q(d);N_GUARD::QAR1(E),XQ(d)
- Q(d);::QAB1(E)
- B(a);::QAR1(E)
- Refutation
- Q(d);XQ(E)
- Try
- Actual
- Q(E);
- Threat
- QAB(E),XP(i)
- Vars
- S(h);OGATE,XS(F)::P(C),XS(h)
- Q(d);N_GUARD::S(F),XQ(d)
- Q(d);N_GUARD::S(F)
- R(b);N_GUARD::P(C),XP(c)
- R(f);N_GUARD::QAR1(E),XR(f)
- S(m);N_GUARD::QAR1(E),XS(m)
- S(m);N_GUARD::QAR1(E)
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).