MESON Chess Problem Database
Problem Display
PID: 162659 (qn4Nk/3b1P2/4P1K1/2p2p2/5pp1/6p1/8/3Q4 w - - 0 1)
Witt, Andreas
Die Schwalbe, 2015
#2
5 + 9
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Qxh1#
- 1...Qc6
- 2.Qa1#
- 1...Qa1
- 2.Qxa1#
- 1...Qa3
- 2.Qh1#
- 1...Qa4
- 2.Qh1#
- 1...Qa5
- 2.Qh1#
- 1...Qa6
- 2.Qh1#
- 1...Qa7
- 2.Qh1#
- 1...Ba4
- 2.Qa1#
- 1...Sa6
- 2.Qa1#
- 1...Sc6
- 2.Qh1#
- 1...f3
- 2.Qh1#
- 1...c4
- 2.Qd4#
- 1...Qh1
- Tries
- 1.Sf6?
- threat
- 2.f8Q#
- 2.f8R#
- 1...Bxe6
- 2.Qd8#
- 1...Qh1
- 2.Qxh1#
- 2.f8Q#
- 2.f8R#
- 1...Qg2
- 2.f8Q#
- 2.f8R#
- 1...Qf3
- 2.f8Q#
- 2.f8R#
- 1...Qe4
- 2.f8Q#
- 2.f8R#
- 1...Qd5
- 2.f8Q#
- 2.f8R#
- 1...Qc6
- 2.f8Q#
- 2.f8R#
- 1...Qb7
- 2.f8Q#
- 2.f8R#
- 1...Qa1
- 2.f8Q#
- 2.f8R#
- 1...Qa2
- 2.f8Q#
- 2.f8R#
- 1...Qa3
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa4
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa5
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa6
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa7
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Ba4
- 2.f8Q#
- 2.f8R#
- 1...Bb5
- 2.f8Q#
- 2.f8R#
- 1...Bc6
- 2.f8Q#
- 2.f8R#
- 1...Bc8
- 2.Qd8#
- 2.f8Q#
- 2.f8R#
- 1...Be8
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sc6
- 2.Qh1#
- 1...g2
- 2.f8Q#
- 2.f8R#
- 1...f3
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...c4
- 2.f8Q#
- 2.f8R#
- 1...Sa6!
- threat
- 1.Sh6?
- threat
- 2.f8Q#
- 2.f8R#
- 1...Bxe6
- 2.Qd8#
- 1...Qh1
- 2.f8Q#
- 2.f8R#
- 1...Qg2
- 2.f8Q#
- 2.f8R#
- 1...Qf3
- 2.f8Q#
- 2.f8R#
- 1...Qe4
- 2.f8Q#
- 2.f8R#
- 1...Qd5
- 2.f8Q#
- 2.f8R#
- 1...Qc6
- 2.Qa1#
- 2.f8Q#
- 2.f8R#
- 1...Qb7
- 2.f8Q#
- 2.f8R#
- 1...Qa1
- 2.Qxa1#
- 2.f8Q#
- 2.f8R#
- 1...Qa2
- 2.f8Q#
- 2.f8R#
- 1...Qa3
- 2.f8Q#
- 2.f8R#
- 1...Qa4
- 2.f8Q#
- 2.f8R#
- 1...Qa5
- 2.f8Q#
- 2.f8R#
- 1...Qa6
- 2.f8Q#
- 2.f8R#
- 1...Qa7
- 2.f8Q#
- 2.f8R#
- 1...Ba4
- 2.Qa1#
- 2.f8Q#
- 2.f8R#
- 1...Bb5
- 2.f8Q#
- 2.f8R#
- 1...Bc6
- 2.f8Q#
- 2.f8R#
- 1...Bc8
- 2.Qd8#
- 2.f8Q#
- 2.f8R#
- 1...Be8
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sa6
- 2.Qa1#
- 1...g2
- 2.f8Q#
- 2.f8R#
- 1...f3
- 2.f8Q#
- 2.f8R#
- 1...c4
- 2.Qd4#
- 2.f8Q#
- 2.f8R#
- 1...Sc6!
- threat
- 1.f8Q?
- threat
- 2.Sf6#
- 2.Sh6#
- 2.Se7#
- 2.Qg7#
- 1...Bxe6
- 2.Qg7#
- 1...Qa1
- 2.Sf6#
- 2.Sh6#
- 2.Se7#
- 2.Qxa1#
- 1...Sa6
- 2.Qg7#
- 2.Qa1#
- 1...Sc6
- 2.Qg7#
- 2.Qh1#
- 1...Be8+!
- threat
- 1.Sf6?
- Keys
- 1.Se7!
- threat
- 2.f8Q#
- 2.f8R#
- 1...Bxe6
- 2.Qd8#
- 1...Qh1
- 2.Qxh1#
- 2.f8Q#
- 2.f8R#
- 1...Qg2
- 2.f8Q#
- 2.f8R#
- 1...Qf3
- 2.f8Q#
- 2.f8R#
- 1...Qe4
- 2.f8Q#
- 2.f8R#
- 1...Qd5
- 2.f8Q#
- 2.f8R#
- 1...Qc6
- 2.Qa1#
- 2.f8Q#
- 2.f8R#
- 1...Qb7
- 2.f8Q#
- 2.f8R#
- 1...Qa1
- 2.Qxa1#
- 2.f8Q#
- 2.f8R#
- 1...Qa2
- 2.f8Q#
- 2.f8R#
- 1...Qa3
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa4
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa5
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa6
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Qa7
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...Ba4
- 2.Qa1#
- 2.f8Q#
- 2.f8R#
- 1...Bb5
- 2.f8Q#
- 2.f8R#
- 1...Bc6
- 2.f8Q#
- 2.f8R#
- 1...Bc8
- 2.Qd8#
- 2.f8Q#
- 2.f8R#
- 1...Be8
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sa6
- 2.Qa1#
- 1...Sc6
- 2.Qh1#
- 1...g2
- 2.f8Q#
- 2.f8R#
- 1...f3
- 2.Qh1#
- 2.f8Q#
- 2.f8R#
- 1...c4
- 2.Qd4#
- 2.f8Q#
- 2.f8R#
- threat
- 1.Se7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 11
- Sets
- Q(g);N_GUARD::QAB(A),XQ(g)
- Q(g);N_GUARD,P_PINP(B)::QAB(A)
- Q(g);N_GUARD::QAB(A)
- B(f);S_CUTQ(g)::QAB(A)
- S(h);S_CUTQ(g)::QAB(A)
- P(b);S_CUTQ(g)::QAB(A)
- P(d);N_GUARD::QAB(A)
- Tries
- Try
- S(E);
- Threat
- P=Q
- Vars
- B(f);OGATE,XP(B)::QAR(A)
- Q(g);::P=Q
- B(f);::P=Q
- B(f);OGATE,P_PINP(D)::PXB(f)=Q
- S(h);S_CUTQ(g)::QAB(A)
- P(a);::P=Q
- P(d);::P=Q
- Refutation
- S(h);
- Try
- S(E);
- Threat
- P=Q
- Vars
- B(f);OGATE,XP(B)::QAR(A)
- Q(g);::P=Q
- Q(g);P_PINP(B)::P=Q
- B(f);::P=Q
- B(f);OGATE,P_PINP(D)::PXB(f)=Q
- S(h);S_CUTQ(g)::QAB(A)
- P(a);::P=Q
- P(b);::P=Q
- Refutation
- S(h);
- Try
- P(D);
- Threat
- DUALS(4)
- Vars
- B(f);XP(B)::QAB1(D)
- Refutation
- B(f);CHECK
- Try
- Actual
- S(E);
- Threat
- P=Q
- Vars
- B(f);OGATE,XP(B)::QAR(A)
- Q(g);::P=Q
- B(f);::P=Q
- B(f);OGATE,P_PINP(D)::PXB(f)=Q
- S(h);S_CUTQ(g)::QAB(A)
- P(a);::P=Q
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).