MESON Chess Problem Database
Problem Display
PID: 265088 (7n/2R2B2/2Q2PP1/1pn1Nk1K/qp3N1R/pP6/1B5p/8 w - - 0 1)
Fichtner, Wolfgang
Die Schwalbe, 1971
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Se4
- 2.Qe6#
- 1...Sxg6
- 2.Bxg6#
- 1...Se4
- Tries
- 1.Se2?
- threat
- 2.Sg3#
- 2.Rf4#
- 2.Qf3#
- 1...Qxb3
- 2.Rf4#
- 1...Sxg6
- 2.Sg3#
- 2.Bxg6#
- 1...Sxf7
- 2.Sg3#
- 2.Rf4#
- 1...Se6
- 2.Qxe6#
- 1...h1Q
- 2.Sg3#
- 1...h1S
- 2.Rf4#
- 2.Qf3#
- 1...h1B
- 2.Sg3#
- 2.Rf4#
- 1...h1R
- 2.Sg3#
- 2.Qf3#
- 1...Qa8
- 2.Sg3#
- 2.Rf4#
- 1...Sd3
- 2.Sg3#
- 2.Qe6#
- 1...Se4
- 2.Rf4#
- 2.Qe6#
- 1...axb2!
- threat
- 1.Sg2?
- threat
- 2.Se3#
- 2.Rf4#
- 2.Qf3#
- 1...Qxb3
- 2.Rf4#
- 1...Sxg6
- 2.Se3#
- 2.Bxg6#
- 1...Sxf7
- 2.Se3#
- 2.Rf4#
- 1...Se6
- 2.Qxe6#
- 1...h1Q
- 2.Se3#
- 2.Qf3#
- 1...h1R
- 2.Se3#
- 2.Qf3#
- 1...Qa8
- 2.Se3#
- 2.Rf4#
- 1...Sd3
- 2.Se3#
- 2.Qe6#
- 1...Se4
- 2.Se3#
- 2.Rf4#
- 2.Qe6#
- 1...axb2!
- threat
- 1.Sfd3?
- threat
- 2.Rf4#
- 2.Qf3#
- 1...Sxd3
- 2.Qe6#
- 1...Sxg6
- 2.Bxg6#
- 1...Sxf7
- 2.Rf4#
- 1...Se6
- 2.Qxe6#
- 1...h1B
- 2.Rf4#
- 1...h1R
- 2.Qf3#
- 1...Qa8
- 2.Rf4#
- 1...Se4
- 2.Rf4#
- 2.Qe6#
- 1...h1Q!
- threat
- 1.Sh3?
- threat
- 2.Rf4#
- 2.Qf3#
- 1...Qxb3
- 2.Rf4#
- 1...Sxg6
- 2.Bxg6#
- 1...Sxf7
- 2.Rf4#
- 1...Se6
- 2.Qxe6#
- 1...h1Q
- 2.Rf4#
- 1...h1B
- 2.Rf4#
- 1...Qa8
- 2.Rf4#
- 1...Sd3
- 2.Qe6#
- 1...Se4
- 2.Rf4#
- 2.Qe6#
- 1...axb2!
- threat
- 1.Sd5?
- threat
- 2.Se3#
- 2.Se7#
- 2.Rf4#
- 1...Qxb3
- 2.Se7#
- 2.Rf4#
- 1...Sxg6
- 2.Se3#
- 2.Bxg6#
- 1...h1Q
- 2.Se3#
- 2.Se7#
- 1...h1R
- 2.Se3#
- 2.Se7#
- 1...Sd3
- 2.Se3#
- 2.Se7#
- 2.Be6#
- 2.Qd7#
- 2.Qe6#
- 1...Se6
- 2.Bxe6#
- 2.Qc2#
- 2.Qxe6#
- 1...axb2!
- threat
- 1.Se6?
- threat
- 2.Sg7#
- 2.Rf4#
- 2.Qf3#
- 1...Kxf6
- 2.Rf4#
- 2.Qf3#
- 1...Qxb3
- 2.Sg7#
- 2.Rf4#
- 1...Sxe6
- 2.Qxe6#
- 1...Sxg6
- 2.Sg7#
- 1...Sxf7
- 2.Sg7#
- 2.Rf4#
- 1...h1Q
- 2.Sg7#
- 1...h1B
- 2.Sg7#
- 2.Rf4#
- 1...h1R
- 2.Sg7#
- 2.Qf3#
- 1...Qa8
- 2.Sg7#
- 2.Rf4#
- 1...Sd3
- 2.Sg7#
- 1...Se4
- 2.Sg7#
- 2.Rf4#
- 1...axb2!
- threat
- 1.Sc4?
- threat
- 2.Se3#
- 2.Sd6#
- 2.Qd5#
- 1...Qxb3
- 2.Sd6#
- 2.Qd5#
- 1...Sxg6
- 2.Se3#
- 2.Sd6#
- 2.Bxg6#
- 1...Sxf7
- 2.Se3#
- 1...bxc4
- 2.Qd5#
- 1...h1Q
- 2.Se3#
- 2.Sd6#
- 1...h1B
- 2.Se3#
- 2.Sd6#
- 1...Qa8
- 2.Se3#
- 2.Sd6#
- 1...Sd3
- 2.Se3#
- 2.Sd6#
- 2.Be6#
- 2.Qe6#
- 1...Se4
- 2.Se3#
- 2.Be6#
- 2.Qd5#
- 2.Qd7#
- 2.Qe6#
- 1...Sb7
- 2.Se3#
- 2.Be6#
- 2.Qd5#
- 2.Qe6#
- 1...Sd7
- 2.Se3#
- 2.Sd6#
- 2.Be6#
- 2.Qe6#
- 1...axb2!
- threat
- 1.Be6+?
- 1...Kxf6
- 2.Sd5#
- 2.Sg4#
- 1...Sxe6!
- 1...Kxf6
- 1.Qf3?
- threat
- 2.Se2#
- 2.Sg2#
- 2.Sfd3#
- 2.Sh3#
- 2.Sd5#
- 2.Se6#
- 1...Kxf6
- 2.Se6#
- 1...Qxb3
- 2.Sfd3#
- 1...Sxg6
- 2.Sfxg6#
- 1...axb2
- 2.Sfd3#
- 1...h1Q
- 2.Sg2#
- 1...h1B
- 2.Sg2#
- 1...Qa8
- 2.Sd5#
- 1...Sd3
- 2.Sfxd3#
- 1...Se6
- 2.Sxe6#
- 1...Sxf7!
- threat
- 1.Qe6+?
- 1...Ke4
- 2.Sg2#
- 2.Sd5#
- 1...Sxe6!
- 1...Ke4
- 1.Se2?
- Keys
- 1.Qd5!
- threat
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sc6#
- 2.Sd7#
- 1...Kxf6
- 2.Sg4#
- 1...Qxb3
- 2.Sc4#
- 1...Sxg6
- 2.Sexg6#
- 1...Sxf7
- 2.Sxf7#
- 1...axb2
- 2.Sd7#
- 1...h1Q
- 2.Sf3#
- 1...h1B
- 2.Sf3#
- 1...Qa8
- 2.Sc6#
- 1...Sd3
- 2.Sexd3#
- 1...Sd7
- 2.Sxd7#
- threat
- 1.Qd5!
This is after
After L. Apro.
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 9
- REMOVED MATES = 1
- Sets
- S(f);N_GUARD,SBLOCK::QAB1(G)
- S(h);OGATE,XP(I)::B(K),XS(h)
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(c);XP(B)::R1(D)
- S(f);N_GUARD::QAB1(G),XS(f)
- P(a);P_PINR(D)::S(C)
- Refutation
- P(b);XB(A)
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(c);XP(B)::R1(D)
- S(f);N_GUARD::QAB1(G),XS(f)
- Refutation
- P(b);XB(A)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- S(f);N_GUARD,XS(C)::QAB1(G)
- S(h);OGATE,XP(I)::B(K),XS(h)
- S(h);XB(K)::R1(D)
- S(f);N_GUARD::QAB1(G),XS(f)
- P(a);::R1(D)
- P(a);P_PINR(D)::QAR2(G)
- Q(c);::R1(D)
- Refutation
- P(a);P_PINR(D)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(c);XP(B)::R1(D)
- S(h);OGATE,XP(I)::B(K),XS(h)
- S(h);XB(K)::R1(D)
- S(f);N_GUARD::QAB1(G),XS(f)
- P(a);::R1(D)
- Q(c);::R1(D)
- S(f);N_GUARD::QAB1(G)
- Refutation
- P(b);XB(A)
- Try
- S(C);
- Threat
- DUALS(3)
- Refutation
- P(b);XB(A)
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- S(f);OGATE,XS(C)::QAB1(G),XS(f)
- S(h);XP(I)::S(C)
- P(a);P_PINR(D)::S(C)
- S(f);::S(C)
- Refutation
- P(b);XB(A)
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- S(h);XB(K)::S(E)
- P(e);XS(E)::QAR2(G)
- Refutation
- P(b);XB(A)
- Try
- B(K);CHECK
- Refutation
- S(f);XB(K)
- Try
- Q(G);
- Threat
- DUALS(6)
- Vars
- K(g);P-FLIGHT,XP(H)::QAR(G)+S(C)
- Q(c);XP(B)::QAR(G)+S(C)
- S(h);XP(I)::QAR(G)+S(C),XS(h)
- P(b);XB(A)::QAR(G)+S(C)
- P(a);P_PINR(D)::QAR(G)+S(C)
- P(a);::QAR(G)+S(C)
- Q(c);::QAR(G)+S(C)
- S(f);::QAR(G)+S(C),XS(f)
- Refutation
- S(h);XB(K)
- Try
- Q(G);CHECK
- Refutation
- S(f);XQ(G)
- Try
- Actual
- Q(G);
- Threat
- DUALS(5)
- Vars
- K(g);N_GUARD,P-FLIGHT,XP(H)::B(A)+S(E),DCHECK
- Q(c);XP(B)::QAR(G)+S(E)
- S(h);XP(I)::QAR(G)+S(E),XS(h)
- S(h);XB(K)::QAR(G)+S(E),XS(h)
- P(b);XB(A)::QAR(G)+S(E)
- P(a);P_PINR(D)::QAR(G)+S(E)
- P(a);::QAR(G)+S(E)
- Q(c);::QAR(G)+S(E)
- S(f);::QAR(G)+S(E),XS(f)
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).