MESON Chess Problem Database
Problem Display
PID: 3114 (2RR3K/3np1N1/p2kpn2/Bb6/p1pP1P2/b1P1N3/8/8 w - - 0 1)
Penrose, Lionel Sharples
Good Companions (April Complete Blocks), 1918
#2
9 + 10
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.Bb4#
- 1...Bb2
- 2.Bb4#
- 1...Bb4
- 2.Bxb4#
- 1...Bc5
- 2.dxc5#
- 1...Bc6
- 2.Bc7#
- 1...Se4
- 2.Se8#
- 1...Sg4
- 2.Se8#
- 1...Sd5
- 2.Se8#
- 1...Sh5
- 2.Se8#
- 1...Sh7
- 2.Se8#
- 1...Se8
- 2.Sxe8#
- 1...Sg8
- 2.Se8#
- 1...e5
- 2.dxe5#
- 2.fxe5#
- 1...Bc1
- Tries
- 1.Rc5?
- threat
- 2.Bc7#
- 1...Bc6
- 2.Sxc4#
- 1...Sd5
- 2.Se8#
- 1...Se8
- 2.Sxe8#
- 1...Bxc5!
- threat
- 1.Rc5?
- Keys
- 1.d5!
- 1...Sxd5
- 2.Se8#
- 1...exd5
- 2.Sef5#
- 1...Bc6
- 2.Rxc6#
- 1...Bc1
- 2.Bb4#
- 1...Bb2
- 2.Bb4#
- 1...Bb4
- 2.Bxb4#
- 1...Bc5
- 2.Bc7#
- 1...Se4
- 2.Se8#
- 1...Sg4
- 2.Se8#
- 1...Sh5
- 2.Se8#
- 1...Sh7
- 2.Se8#
- 1...Se8
- 2.Sxe8#
- 1...Sg8
- 2.Se8#
- 1...e5
- 2.Sgf5#
- 1...Sxd5
- 1.d5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD::B(E)
- B(a);N_GUARD::B(E),XB(a)
- B(a);OGATE::P(C),XB(a)
- B(d);SBLOCK::B(E)
- S(h);N_GUARD::S(F)
- S(h);N_GUARD::S(F),XS(h)
- Tries
- Try
- R(G);
- Threat
- B(E)
- Vars
- B(d);N_GUARD::S(B),XP(c)
- S(h);N_GUARD::S(F)
- S(h);N_GUARD::S(F),XS(h)
- Refutation
- B(a);XR(G)
- Try
- Actual
- P(C);
- Vars
- S(h);N_GUARD,XP(C)::S(F)
- P(g);N_GUARD,SBLOCK,XP(C)::S(B)
- B(d);N_GUARD::R1(G),XB(d)
- B(a);N_GUARD::B(E)
- B(a);N_GUARD::B(E),XB(a)
- B(a);SBLOCK::B(E)
- S(h);N_GUARD::S(F)
- S(h);N_GUARD::S(F),XS(h)
- P(g);N_GUARD::S(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).