MESON Chess Problem Database
Problem Display
PID: 21578 (7n/6K1/8/3pk3/1Q3NB1/5R2/8/2br4 w - - 0 1)
Alvey, George Clarence Vincent
Surrey Weekly Press, 1919
#2
5 + 5
| 2681 | All Change Here! | 1919 |
| 756 | Norsk Sjakkblad | 1919 |
| 3360 | Simple Two-move Themes | 1924 |
| 3310 | 2345 Chess Problems | 1997 |
| 56 | The Problemist | 2003 |
| 5293 | A selection of chess problems by G. C. Alvey | 2004 |
| 15148 | Sadier Collection | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Sd3#
- 1...Rf1
- 2.Sd3#
- 1...Rg1
- 2.Sd3#
- 1...Rh1
- 2.Sd3#
- 1...Rd2
- 2.Re3#
- 1...Rd3
- 2.Sxd3#
- 1...Rd4
- 2.Qe7#
- 1...Bb2
- 2.Re3#
- 1...Bd2
- 2.Sd3#
- 1...Ba3
- 2.Re3#
- 1...Be3
- 2.Rxe3#
- 1...Bxf4
- 2.Qxf4#
- 1...Sg6
- 2.Sxg6#
- 1...Sf7
- 2.Sg6#
- 1...d4
- 2.Qe7#
- 1...Re1
- Tries
- 1.Bh3?
- 1...Bxf4
- 2.Qxf4#
- 1...Rd4
- 2.Qe7#
- 1...d4
- 2.Qe7#
- 1...Rd2
- 2.Re3#
- 1...Re1
- 2.Sd3#
- 1...Rf1
- 2.Sd3#
- 1...Rh1
- 2.Sd3#
- 1...Rd3
- 2.Sxd3#
- 1...Bb2
- 2.Re3#
- 1...Bd2
- 2.Sd3#
- 1...Ba3
- 2.Re3#
- 1...Be3
- 2.Rxe3#
- 1...Sg6
- 2.Sxg6#
- 1...Sf7
- 2.Sg6#
- 1...Rg1+!
- 1...Bxf4
- 1.Bd7?
- 1...Bxf4
- 2.Qxf4#
- 1...Rd4
- 2.Qe7#
- 1...d4
- 2.Qe7#
- 1...Rd2
- 2.Re3#
- 1...Re1
- 2.Sd3#
- 1...Rf1
- 2.Sd3#
- 1...Rh1
- 2.Sd3#
- 1...Rd3
- 2.Sxd3#
- 1...Bb2
- 2.Re3#
- 1...Bd2
- 2.Sd3#
- 1...Ba3
- 2.Re3#
- 1...Be3
- 2.Rxe3#
- 1...Sg6
- 2.Sxg6#
- 1...Sf7
- 2.Sg6#
- 1...Rg1+!
- 1...Bxf4
- 1.Bc8?
- 1...Bxf4
- 2.Qxf4#
- 1...Rd4
- 2.Qe7#
- 1...d4
- 2.Qe7#
- 1...Rd2
- 2.Re3#
- 1...Re1
- 2.Sd3#
- 1...Rf1
- 2.Sd3#
- 1...Rh1
- 2.Sd3#
- 1...Rd3
- 2.Sxd3#
- 1...Bb2
- 2.Re3#
- 1...Bd2
- 2.Sd3#
- 1...Ba3
- 2.Re3#
- 1...Be3
- 2.Rxe3#
- 1...Sg6
- 2.Sxg6#
- 1...Sf7
- 2.Sg6#
- 1...Rg1+!
- 1...Bxf4
- 1.Bh3?
- Keys
- 1.Rd3!
- 1...Rxd3
- 2.Sxd3#
- 1...Bxf4
- 2.Qe7#
- 1...d4
- 2.Qxd4#
- 1...Rd2
- 2.Re3#
- 1...Re1
- 2.Rxd5#
- 1...Rf1
- 2.Rxd5#
- 1...Rg1
- 2.Rxd5#
- 1...Rh1
- 2.Rxd5#
- 1...Bb2
- 2.Re3#
- 1...Bd2
- 2.Rxd5#
- 1...Ba3
- 2.Re3#
- 1...Be3
- 2.Rxe3#
- 1...Sg6
- 2.Sxg6#
- 1...Sf7
- 2.Sg6#
- 1...Rxd3
- 1.Rd3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(b);N_GUARD::S(C)
- R(b);N_GUARD,P_PINB(D)::S(C)
- R(b);S_CUTB(a)::R(A)
- R(b);N_GUARD::S(C),XR(b)
- R(b);SBLOCK::QAR2(B)
- B(a);N_GUARD::R(A)
- B(a);S_CUTR(b)::S(C)
- B(a);N_GUARD::R(A),XB(a)
- B(a);OGATE,XS(C)::QAB1(B),XB(a)
- S(e);N_GUARD::S(C),XS(e)
- S(e);N_GUARD::S(C)
- P(c);SBLOCK::QAR2(B)
- Tries
- Try
- B(D);
- Vars
- B(a);OGATE,XS(C)::QAB1(B),XB(a)
- R(b);SBLOCK::QAR2(B)
- P(c);SBLOCK::QAR2(B)
- R(b);S_CUTB(a)::R(A)
- R(b);N_GUARD::S(C)
- R(b);N_GUARD::S(C),XR(b)
- B(a);N_GUARD::R(A)
- B(a);S_CUTR(b)::S(C)
- B(a);N_GUARD::R(A),XB(a)
- S(e);N_GUARD::S(C),XS(e)
- S(e);N_GUARD::S(C)
- Refutation
- R(b);CHECK
- Try
- B(D);
- Vars
- B(a);OGATE,XS(C)::QAB1(B),XB(a)
- R(b);SBLOCK::QAR2(B)
- P(c);SBLOCK::QAR2(B)
- R(b);S_CUTB(a)::R(A)
- R(b);N_GUARD::S(C)
- R(b);N_GUARD::S(C),XR(b)
- B(a);N_GUARD::R(A)
- B(a);S_CUTR(b)::S(C)
- B(a);N_GUARD::R(A),XB(a)
- S(e);N_GUARD::S(C),XS(e)
- S(e);N_GUARD::S(C)
- Refutation
- R(b);CHECK
- Try
- B(D);
- Vars
- B(a);OGATE,XS(C)::QAB1(B),XB(a)
- R(b);SBLOCK::QAR2(B)
- P(c);SBLOCK::QAR2(B)
- R(b);S_CUTB(a)::R(A)
- R(b);N_GUARD::S(C)
- R(b);N_GUARD::S(C),XR(b)
- B(a);N_GUARD::R(A)
- B(a);S_CUTR(b)::S(C)
- B(a);N_GUARD::R(A),XB(a)
- S(e);N_GUARD::S(C),XS(e)
- S(e);N_GUARD::S(C)
- Refutation
- R(b);CHECK
- Try
- Actual
- R(A);
- Vars
- R(b);XR(A)::S(C),XR(b)
- B(a);SBLOCK,XS(C)::QAR2(B)
- P(c);::QAB1(B),XP(c)
- R(b);S_CUTB(a)::R(A)
- R(b);N_GUARD::R1(A),XP(c)
- R(b);N_GUARD,P_PINB(D)::R1(A),XP(c)
- B(a);N_GUARD::R(A)
- B(a);S_CUTR(b)::R1(A),XP(c)
- B(a);N_GUARD::R(A),XB(a)
- S(e);N_GUARD::S(C),XS(e)
- S(e);N_GUARD::S(C)
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).