MESON Chess Problem Database
Problem Display
PID: 2973 (5B2/5K2/8/3n2pk/3pNp1q/5P2/p5N1/Q6R w - - 0 1)
van der Ven, AMA
Source?, 1914
#2
7 + 7
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Qxh1
- 2.Qxh1#
- 1...Qh2
- 2.Rxh2#
- 1...Qh3
- 2.Rxh3#
- 1...Sc3
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...d3
- 2.Qh8#
- 1...g4
- 2.Rxh4#
- 1...Qxh1
- Tries
- 1.Kg7?
- 1...Qxh1
- 2.Qxh1#
- 1...Qh2
- 2.Rxh2#
- 1...Qh3
- 2.Rxh3#
- 1...Sc3
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...g4
- 2.Rxh4#
- 1...d3!
- 1...Qxh1
- 1.Sxf4+?
- 1...Sxf4
- 2.Sg3#
- 2.Sf6#
- 1...gxf4!
- 1...Sxf4
- 1.Bg7?
- 1...Qxh1
- 2.Qxh1#
- 1...Sc3
- 2.Sf6#
- 1...Qh2
- 2.Rxh2#
- 1...Qh3
- 2.Rxh3#
- 1...Se3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...g4
- 2.Rxh4#
- 1...d3!
- 1...Qxh1
- 1.Rh2?
- 1...Sc3
- 2.Sf6#
- 1...Qh3
- 2.Rxh3#
- 1...Se3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...d3
- 2.Qh8#
- 1...g4
- 2.Rxh4#
- 1...Qxh2!
- 1...Sc3
- 1.Rh3?
- 1...Sc3
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...d3
- 2.Qh8#
- 1...g4
- 2.Rxh4#
- 1...Qxh3!
- 1...Sc3
- 1.Kg7?
- Keys
- 1.Se3!
- 1...Qxh1
- 2.Qxh1#
- 1...Sxe3
- 2.Sf6#
- 1...dxe3
- 2.Qh8#
- 1...fxe3
- 2.Sg3#
- 1...Qh2
- 2.Rxh2#
- 1...Qh3
- 2.Rxh3#
- 1...Sc3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...d3
- 2.Qh8#
- 1...g4
- 2.fxg4#
- 1...Qxh1
- 1.Se3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(d);N_SPINQ(d),OGATE,XR(B)::QAR(A),XQ(d)
- Q(d);OGATEB::R(B),XQ(d)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- P(b);OGATE::QAR(A)
- P(f);N_GUARD::R1(B),XQ(d)
- Tries
- Try
- K(F);P-FLIGHT
- Vars
- Q(d);N_SPINQ(d),OGATE,XR(B)::QAR(A),XQ(d)
- Q(d);OGATEB::R(B),XQ(d)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- P(f);N_GUARD::R1(B),XQ(d)
- Refutation
- P(b);
- Try
- S(C);CHECK,XP(c)
- Refutation
- P(f);XS(C)
- Try
- B(G);
- Vars
- Q(d);N_SPINQ(d),OGATE,XR(B)::QAR(A),XQ(d)
- S(e);N_GUARD::S(E)
- Q(d);OGATEB::R(B),XQ(d)
- S(e);N_GUARD::S(E),XS(e)
- P(f);N_GUARD::R1(B),XQ(d)
- Refutation
- P(b);
- Try
- R(B);
- Vars
- S(e);N_GUARD::S(E)
- Q(d);OGATEB::R(B),XQ(d)
- S(e);N_GUARD::S(E),XS(e)
- P(b);OGATE::QAR(A)
- P(f);N_GUARD::R1(B),XQ(d)
- Refutation
- Q(d);N_SPINQ(d),XR(B)
- Try
- R(B);
- Vars
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- P(b);OGATE::QAR(A)
- P(f);N_GUARD::R1(B),XQ(d)
- Refutation
- Q(d);N_SPINQ(d),XR(B)
- Try
- Actual
- S(C);
- Vars
- Q(d);N_SPINQ(d),OGATE,XR(B)::QAR(A),XQ(d)
- S(e);N_GUARD,XS(C)::S(E)
- P(b);OGATE,XS(C)::QAR(A)
- P(c);N_GUARD,XS(C)::S(E)
- Q(d);OGATEB::R(B),XQ(d)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- P(b);OGATE::QAR(A)
- P(f);OGATE::P(D),XP(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).