MESON Chess Problem Database
Problem Display
PID: 4602 (Br6/1P3N1P/8/3k1P1K/p1R5/p2N4/Q2b4/1n6 w - - 0 1)
Bettmann, Edgar
Bettmann, Henry Wald
Bettmann, Jacob
Chr. Telegraph, 1882
#2
9 + 6
| 16 | Chess Amateur (The) | 1910 |
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Rd8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Re8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rf8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rg8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rh8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Bc1
- 2.Sb4#
- 1...Be1
- 2.Sf4#
- 1...Bc3
- 2.Sf4#
- 1...Be3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 1...Ba5
- 2.Sf4#
- 1...Bg5
- 2.Sb4#
- 1...Bh6
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Rxb7
- Tries
- 1.Kg4?
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Rd8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Re8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rf8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rh8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Bc1
- 2.Sb4#
- 1...Be1
- 2.Sf4#
- 1...Bc3
- 2.Sf4#
- 1...Be3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 1...Ba5
- 2.Sf4#
- 1...Bg5
- 2.Sb4#
- 1...Bh6
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Rg8+!
- 1...Rxb7
- 1.Kg6?
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Rd8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Re8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rf8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rh8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Bc1
- 2.Sb4#
- 1...Be1
- 2.Sf4#
- 1...Bc3
- 2.Sf4#
- 1...Be3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 1...Ba5
- 2.Sf4#
- 1...Bg5
- 2.Sb4#
- 1...Bh6
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Rg8+!
- 1...Rxb7
- 1.Qb3?
- threat
- 2.Qb5#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Be3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 1...Sc3
- 2.Sb4#
- 1...axb3!
- threat
- 1.h8Q?
- threat
- 2.Qd4#
- 2.Qe5#
- 1...Re8
- 2.Qd4#
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Bc3
- 2.Sf4#
- 1...Be3
- 2.Sb4#
- 2.Qe5#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 2.Qd4#
- 1...Rxh8+!
- threat
- 1.h8S?
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Bc1
- 2.Sb4#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Rd8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Re8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rf8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rg8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Be1
- 2.Sf4#
- 1...Bc3
- 2.Sf4#
- 1...Be3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 1...Ba5
- 2.Sf4#
- 1...Bg5
- 2.Sb4#
- 1...Bh6
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Rxh8+!
- 1...Rxb7
- 1.h8B?
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Bc1
- 2.Sb4#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Rd8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Re8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rf8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rg8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Be1
- 2.Sf4#
- 1...Bc3
- 2.Sf4#
- 1...Be3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 1...Ba5
- 2.Sf4#
- 1...Bg5
- 2.Sb4#
- 1...Bh6
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Rxh8+!
- 1...Rxb7
- 1.h8R?
- 1...Rxb7
- 2.Bxb7#
- 2.Rd8#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Bc1
- 2.Sb4#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Rd8
- 2.Rxd8#
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Re8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rf8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rg8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Be1
- 2.Sf4#
- 1...Bc3
- 2.Sf4#
- 1...Be3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 2.Sf4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 1...Ba5
- 2.Sf4#
- 1...Bg5
- 2.Sb4#
- 1...Bh6
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 1...Rxh8+!
- 1...Rxb7
- 1.Kg4?
- Keys
- 1.Sde5!
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Bc1
- 2.Qg2#
- 1...Rc8
- 2.bxc8Q#
- 2.bxc8S#
- 2.bxc8B#
- 2.bxc8R#
- 1...Rd8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Re8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rf8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rg8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Rh8
- 2.b8Q#
- 2.b8S#
- 2.b8B#
- 2.b8R#
- 1...Be1
- 2.Qg2#
- 1...Bc3
- 2.Qg2#
- 1...Be3
- 2.Qg2#
- 1...Bb4
- 2.Qg2#
- 1...Bf4
- 2.Qg2#
- 1...Ba5
- 2.Qg2#
- 1...Bg5
- 2.Qg2#
- 1...Bh6
- 2.Qg2#
- 1...Sc3
- 2.Qxd2#
- 1...Rxb7
- 1.Sde5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(f);OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
- R(f);OGATE,XB(I)::PXR(f)=Q
- B(b);N_GUARD::S(B)
- S(a);S_CUTB(b)::S(B)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- R(f);OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
- R(f);OGATE,XB(I)::PXR(f)=Q
- B(b);N_GUARD::S(B)
- S(a);S_CUTB(b)::S(B)
- Refutation
- R(f);CHECK
- Try
- K(E);S_FLIGHT
- Vars
- R(f);OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
- R(f);OGATE,XB(I)::PXR(f)=Q
- B(b);N_GUARD::S(B)
- S(a);S_CUTB(b)::S(B)
- Refutation
- R(f);CHECK
- Try
- Q(A);
- Threat
- QAR2(A)
- Vars
- B(b);N_GUARD::S(B)
- S(a);S_CUTB(b)::S(B)
- Refutation
- P(d);XQ(A)
- Try
- P(H);
- Threat
- DUALS(2)
- Vars
- B(b);N_GUARD::S(B)
- Refutation
- R(f);CHECK,XQ(H)
- Try
- P(H);
- Vars
- R(f);OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
- R(f);OGATE,XB(I)::PXR(f)=Q
- B(b);N_GUARD::S(B)
- S(a);S_CUTB(b)::S(B)
- Refutation
- R(f);CHECK,XS(H)
- Try
- P(H);
- Vars
- R(f);OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
- R(f);OGATE,XB(I)::PXR(f)=Q
- B(b);N_GUARD::S(B)
- S(a);S_CUTB(b)::S(B)
- Refutation
- R(f);CHECK,XB(H)
- Try
- P(H);
- Vars
- R(f);OGATE,XB(I)::PXR(f)=Q
- B(b);N_GUARD::S(B)
- S(a);S_CUTB(b)::S(B)
- Refutation
- R(f);CHECK,XR(H)
- Try
- Actual
- S(B);
- Vars
- R(f);OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
- R(f);OGATE,XB(I)::PXR(f)=Q
- B(b);OGATE::QAB(A)
- S(a);N_GUARD::QAR(A),XB(b)
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).