MESON Chess Problem Database
Problem Display
PID: 269208 (2n5/3K4/ppN4p/b2k2pP/p2P2p1/2RP1p2/3pNP2/3B3Q w - - 0 1)
Lawton, Howard
The Observer, 1957
(First published on Sun Dec 15 1957)
#2
10 + 11
| 17397 | Ling Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Bxc3
- 2.Sxc3#
- 1...Bb4
- 2.Sxb4#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a3
- 2.Bb3#
- 1...g3
- 2.Qxf3#
- 1...b5
- 2.Rc5#
- 1...Bxc3
- Tries
- 1.Rc2?
- 1...Bb4
- 2.Sxb4#
- 1...Bc3
- 2.Sxc3#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g3
- 2.Qxf3#
- 1...b5
- 2.Rc5#
- 1...a3!
- 1...Bb4
- 1.Ra3?
- 1...Bb4
- 2.Sxb4#
- 1...Bc3
- 2.Sxc3#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g3
- 2.Qxf3#
- 1...b5!
- 1...Bb4
- 1.Rc4?
- 1...Bb4
- 2.Sxb4#
- 1...Bc3
- 2.Sxc3#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g3
- 2.Qxf3#
- 1...b5
- 2.Rc5#
- 1...a3!
- 1...Bb4
- 1.Qg2?
- 1...Bxc3
- 2.Sxc3#
- 1...Bb4
- 2.Sxb4#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a3
- 2.Bb3#
- 1...g3
- 2.Qxf3#
- 1...b5
- 2.Rc5#
- 1...fxg2!
- 1...Bxc3
- 1.Qf1?
- 1...Bxc3
- 2.Sxc3#
- 1...fxe2
- 2.Qg2#
- 2.Qh1#
- 1...Bb4
- 2.Sxb4#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a3
- 2.Bb3#
- 1...b5
- 2.Rc5#
- 1...g3!
- 1...Bxc3
- 1.Qg1?
- 1...Bxc3
- 2.Sxc3#
- 1...fxe2
- 2.Qh1#
- 2.Qg2#
- 1...Bb4
- 2.Sxb4#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a3
- 2.Bb3#
- 1...b5
- 2.Rc5#
- 1...g3!
- 1...Bxc3
- 1.Qh3?
- 1...Bxc3
- 2.Sxc3#
- 1...fxe2
- 2.Qg2#
- 2.Qh1#
- 1...Bb4
- 2.Sxb4#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a3
- 2.Bb3#
- 1...g3
- 2.Qf5#
- 2.Qe6#
- 1...b5
- 2.Rc5#
- 1...gxh3!
- 1...Bxc3
- 1.Rc2?
- Keys
- 1.Qh4!
- 1...Bxc3
- 2.Sxc3#
- 1...fxe2
- 2.Qh1#
- 1...gxh4
- 2.Sf4#
- 1...Bb4
- 2.Sxb4#
- 1...Sd6
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...a3
- 2.Bb3#
- 1...g3
- 2.Qe4#
- 1...b5
- 2.Rc5#
- 1...Bxc3
- 1.Qh4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(e);XR(E)::S(C),XB(e)
- B(e);N_GUARD::S(I),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::B(A)
- P(d);N_GUARD::QAB(B),XP(b)
- P(i);N_GUARD::R1(E)
- Tries
- Try
- R(E);
- Vars
- B(e);N_GUARD::S(I),XB(e)
- B(e);N_GUARD::S(C),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(d);N_GUARD::QAB(B),XP(b)
- P(i);N_GUARD::R1(E)
- Refutation
- P(c);
- Try
- R(E);
- Vars
- B(e);N_GUARD::S(I),XB(e)
- B(e);N_GUARD::S(C),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(d);N_GUARD::QAB(B),XP(b)
- Refutation
- P(i);
- Try
- R(E);
- Vars
- B(e);N_GUARD::S(I),XB(e)
- B(e);N_GUARD::S(C),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(d);N_GUARD::QAB(B),XP(b)
- P(i);N_GUARD::R1(E)
- Refutation
- P(c);
- Try
- Q(B);
- Vars
- B(e);XR(E)::S(C),XB(e)
- B(e);N_GUARD::S(I),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::B(A)
- P(d);N_GUARD::QAB(B),XP(b)
- P(i);N_GUARD::R1(E)
- Refutation
- P(b);N_SPINP(b),XQ(B)
- Try
- Q(B);N_PINP(b)
- Vars
- B(e);XR(E)::S(C),XB(e)
- B(e);N_GUARD::S(I),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::B(A)
- P(i);N_GUARD::R1(E)
- Refutation
- P(d);
- Try
- Q(B);N_PINP(b)
- Vars
- B(e);XR(E)::S(C),XB(e)
- B(e);N_GUARD::S(I),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::B(A)
- P(i);N_GUARD::R1(E)
- Refutation
- P(d);
- Try
- Q(B);N_PINP(b)
- Vars
- B(e);XR(E)::S(C),XB(e)
- B(e);N_GUARD::S(I),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::B(A)
- P(i);N_GUARD::R1(E)
- Refutation
- P(d);XQ(B)
- Try
- Actual
- Q(B);N_PINP(b)
- Vars
- B(e);XR(E)::S(C),XB(e)
- P(b);OGATEB,XS(C)::QAB(B)
- P(g);N_GUARD,XQ(B)::S(C)
- B(e);N_GUARD::S(I),XB(e)
- S(k);N_GUARD::S(I)
- S(k);N_GUARD::S(I),XS(k)
- P(c);N_GUARD::B(A)
- P(d);OGATE::QAB1(B)
- P(i);N_GUARD::R1(E)
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).