MESON Chess Problem Database
Problem Display
PID: 96516 (Bb1B4/2p4p/7p/5p1n/2bPNk2/4pN1K/6PP/1Q6 w - - 0 1)
Lincoln, Robert A
US Problem Bulletin, 1988
#2
9 + 9
| 6490 | yacpdb | 2009 |
| 136 | Problem Observer | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Ba7
- 2.Bxc7#
- 1...Sg3
- 2.hxg3#
- 1...e2
- 2.Qc1#
- 1...fxe4
- 2.Qxe4#
- 1...c5
- 2.Qxb8#
- 1...Ba7
- Tries
- 1.Sc3?
- 1...e2
- 2.Qc1#
- 1...Be2
- 2.Sxe2#
- 2.Sd5#
- 1...Bf1
- 2.Sd5#
- 1...Ba2
- 2.Se2#
- 1...Bb3
- 2.Se2#
- 1...Bb5
- 2.Sd5#
- 1...Bd5
- 2.Se2#
- 2.Sxd5#
- 1...Ba6
- 2.Sd5#
- 1...Be6
- 2.Se2#
- 1...Bf7
- 2.Se2#
- 1...Bg8
- 2.Se2#
- 1...Ba7
- 2.Bxc7#
- 1...Sg3
- 2.hxg3#
- 1...Sf6
- 2.g3#
- 1...Sg7
- 2.g3#
- 1...c5
- 2.Qxb8#
- 1...c6
- 2.Qxb8#
- 1...Bd3!
- 1...e2
- 1.Sg3?
- threat
- 2.Sxh5#
- 2.Qxf5#
- 1...Sxg3
- 2.hxg3#
- 1...e2
- 2.Qc1#
- 1...Bd3
- 2.Sxh5#
- 1...Be6
- 2.Se2#
- 2.Sxh5#
- 1...Bf7
- 2.Se2#
- 2.Qxf5#
- 1...Sf6
- 2.Qxf5#
- 1...Sg7!
- threat
- 1.Sc5?
- 1...e2
- 2.Qc1#
- 1...Be2
- 2.Se6#
- 1...Bf1
- 2.Se6#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 2.Se6#
- 1...Bb5
- 2.Se6#
- 1...Ba6
- 2.Se6#
- 1...Be6
- 2.Sd3#
- 2.Sxe6#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Ba7
- 2.Bxc7#
- 1...Sg3
- 2.hxg3#
- 1...Sf6
- 2.g3#
- 1...Sg7
- 2.g3#
- 1...c6
- 2.Qxb8#
- 1...Bd5!
- 1...e2
- 1.Sf6?
- threat
- 2.Sxh5#
- 1...Sxf6
- 2.g3#
- 1...e2
- 2.Qc1#
- 1...Sg3
- 2.hxg3#
- 1...Sg7
- 2.g3#
- 1...Bf7!
- threat
- 1.Qe1?
- threat
- 2.Qh4#
- 1...e2
- 2.Qd2#
- 2.Qc1#
- 1...Sg3
- 2.Qxg3#
- 2.hxg3#
- 1...Sf6
- 2.Qg3#
- 1...fxe4!
- threat
- 1.Sc3?
- Keys
- 1.Sfg5!
- 1...fxe4
- 2.Qxe4#
- 1...hxg5
- 2.Bxg5#
- 1...e2
- 2.Qc1#
- 1...Be2
- 2.Se6#
- 1...Bf1
- 2.Se6#
- 2.Qxf1#
- 1...Ba2
- 2.Qf1#
- 1...Bb3
- 2.Qf1#
- 1...Bd3
- 2.Se6#
- 1...Bb5
- 2.Se6#
- 1...Bd5
- 2.Qf1#
- 1...Ba6
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 2.Qf1#
- 1...Bf7
- 2.Qf1#
- 1...Bg8
- 2.Qf1#
- 1...Ba7
- 2.Bxc7#
- 1...Sg3
- 2.hxg3#
- 1...Sf6
- 2.g3#
- 1...Sg7
- 2.g3#
- 1...c5
- 2.Qxb8#
- 1...c6
- 2.Qxb8#
- 1...fxe4
- 1.Sfg5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 13
- REMOVED MATES = 0
- Sets
- B(i);N_GUARD::B(I),XP(g)
- S(e);OGATE::P(C),XS(e)
- P(a);OGATEB::QAB(A)
- P(d);OGATE,XS(G)::QAR1(A),XP(d)
- P(g);OGATEB::QAB(A),XB(i)
- Tries
- Try
- S(G);
- Vars
- P(a);OGATEB::QAB(A)
- B(b);N_GUARD,P_PINP(B)::S(G)
- B(b);N_GUARD::S(G)
- B(i);N_GUARD::B(I),XP(g)
- S(e);OGATE::P(C),XS(e)
- S(e);N_GUARD::P(B)
- P(g);OGATEB::QAB(A),XB(i)
- Refutation
- B(b);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- S(e);OGATE,XS(G)::P(C),XS(e)
- P(a);OGATEB::QAB(A)
- B(b);::S(G),XS(e)
- S(e);::QAR1(A),XP(d)
- Refutation
- S(e);
- Try
- S(G);
- Vars
- P(a);OGATEB::QAB(A)
- B(b);N_GUARD::S(G)
- B(b);N_GUARD,P_PINP(B)::S(G)
- B(i);N_GUARD::B(I),XP(g)
- S(e);OGATE::P(C),XS(e)
- S(e);N_GUARD::P(B)
- P(g);OGATEB::QAB(A),XB(i)
- Refutation
- B(b);
- Try
- S(G);
- Threat
- S(G),XS(e)
- Vars
- S(e);N_GUARD,XS(G)::P(B)
- P(a);OGATEB::QAB(A)
- S(e);OGATE::P(C),XS(e)
- S(e);N_GUARD::P(B)
- Refutation
- B(b);
- Try
- Q(A);
- Threat
- QAR2(A)
- Vars
- S(e);N_GUARD::QAB1(A)
- Refutation
- P(d);XS(G)
- Try
- Actual
- S(D);
- Vars
- P(d);OGATE,XS(G)::QAR1(A),XP(d)
- P(f);OGATE,XS(D)::B(I),XP(f)
- P(a);OGATEB::QAB(A)
- B(b);N_GUARD::S(D)
- B(b);N_GUARD::QAR(A)
- B(i);N_GUARD::B(I),XP(g)
- S(e);OGATE::P(C),XS(e)
- S(e);N_GUARD::P(B)
- P(g);OGATEB::QAB(A),XB(i)
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).