MESON Chess Problem Database
Problem Display
PID: 98223 (6Q1/1p1p1p1n/B7/N1rk1P1b/1p2NB2/2PP4/8/1K6 w - - 0 1)
Lincoln, Robert A
US Problem Bulletin, 1992
#2
9 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rc4
- 2.Bxc4#
- 1...Rxa5
- 2.Bxb7#
- 1...Bd1
- 2.Qxf7#
- 1...Be2
- 2.Qxf7#
- 1...Bf3
- 2.Qxf7#
- 1...Bg4
- 2.Qxf7#
- 1...Sg5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- 1...Rc4
- Tries
- 1.Qg1?
- threat
- 2.Qd4#
- 2.Qxc5#
- 1...Rxa5
- 2.Bxb7#
- 1...bxc3
- 2.Qxc5#
- 1...Rc4
- 2.Bxc4#
- 1...Rb5
- 2.Qd4#
- 2.c4#
- 1...Rc6
- 2.Qd4#
- 1...Rc7
- 2.Qd4#
- 1...Rc8
- 2.Qd4#
- 1...b6
- 2.Qd4#
- 1...d6
- 2.Qd4#
- 1...Rxc3!
- threat
- 1.Qb8?
- threat
- 2.Qe5#
- 2.Qd6#
- 1...Rxa5
- 2.Bxb7#
- 2.Qd6#
- 2.Qxb7#
- 1...Rc6
- 2.Qe5#
- 1...d6
- 2.Qxd6#
- 1...f6
- 2.Qd6#
- 1...Rc7!
- threat
- 1.Qe8?
- threat
- 2.Qxd7#
- 2.Qe5#
- 1...Rxa5
- 2.Bxb7#
- 2.Qxd7#
- 1...Rc6
- 2.Qe5#
- 1...Rc7
- 2.Qe5#
- 1...Sf6
- 2.Sxf6#
- 2.Qe5#
- 1...Sf8
- 2.Sf6#
- 2.Qe5#
- 1...f6
- 2.Qxd7#
- 1...d6!
- threat
- 1.Qf8?
- threat
- 2.Qxc5#
- 2.Qd6#
- 1...Rxc3
- 2.Qd6#
- 1...Rxa5
- 2.Bxb7#
- 2.Qd6#
- 1...Sxf8
- 2.Sf6#
- 1...Rc4
- 2.Bxc4#
- 2.Qd6#
- 1...Rb5
- 2.Qd6#
- 1...Rc7
- 2.Qd6#
- 1...Rc8
- 2.Qd6#
- 1...b6
- 2.Qd6#
- 1...d6
- 2.Qxd6#
- 1...Rc6!
- threat
- 1.Qh8?
- threat
- 2.Qd4#
- 2.Qe5#
- 1...Rxc3
- 2.Qe5#
- 1...Rxa5
- 2.Bxb7#
- 1...bxc3
- 2.Qe5#
- 1...Rc4
- 2.Bxc4#
- 2.Qe5#
- 1...Sf6
- 2.Sxf6#
- 1...d6
- 2.Qd4#
- 1...f6!
- threat
- 1.Qg1?
- Keys
- 1.Qg7!
- threat
- 2.Qd4#
- 2.Qe5#
- 1...Rxc3
- 2.Qe5#
- 1...Rxa5
- 2.Bxb7#
- 1...bxc3
- 2.Qe5#
- 1...Rc4
- 2.Bxc4#
- 2.Qe5#
- 1...Sf6
- 2.Sxf6#
- 1...d6
- 2.Qd4#
- 1...f6
- 2.Qxd7#
- threat
- 1.Qg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 7
- Sets
- R(b);N_GUARD::B(H),XR(b)
- R(b);N_GUARD,XS(F)::B(H),XP(e)
- B(d);N_GUARD::QAB(I),XP(g)
- S(h);N_GUARD::S(D)
- S(h);N_GUARD::S(D),XS(h)
- Tries
- Try
- Q(I);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- R(b);N_GUARD,XS(F)::B(H),XP(e)
- P(a);XP(B)::QAR1(I),XR(b)
- R(b);N_GUARD::B(H),XR(b)
- R(b);::QAR1(I)
- P(e);::QAR1(I)
- P(f);::QAR1(I)
- Refutation
- R(b);XP(B)
- Try
- Q(I);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- R(b);::QAR1(I)
- P(f);::QAR1(I),XP(f)
- P(g);::QAR1(I)
- Refutation
- R(b);
- Try
- Q(I);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- R(b);::QAR1(I)
- P(g);::QAR2(I),XP(f)
- Refutation
- P(f);
- Try
- Q(I);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- R(b);XP(B)::QAR1(I)
- S(h);N_GUARD,XQ(I)::S(D)
- R(b);::QAR1(I)
- P(e);::QAR1(I)
- P(f);::QAR1(I),XP(f)
- Refutation
- R(b);
- Try
- Q(I);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- R(b);XP(B)::QAR1(I)
- R(b);N_GUARD,XS(F)::B(H),XP(e)
- P(a);XP(B)::QAR1(I)
- S(h);N_GUARD::S(D),XS(h)
- P(f);::QAR1(I)
- Refutation
- P(g);
- Try
- Actual
- Q(I);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- R(b);XP(B)::QAR1(I)
- R(b);N_GUARD,XS(F)::B(H),XP(e)
- P(a);XP(B)::QAR1(I)
- S(h);N_GUARD::S(D),XS(h)
- P(f);::QAR1(I)
- P(g);OGATE::QAR2(I),XP(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).