MESON Chess Problem Database
Problem Display
PID: 69987 (1q6/3Bp1np/R7/1N1kPp2/5Rp1/6Q1/1bpNp2K/1r1b2B1 w - - 0 1)
Keller, Michael
Papack, Daniel
Sp. HM., Die Schwalbe, 1990
#2
9 + 12
| 4655 | Michael Keller Ein Meister der Schachkomposition | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Kxe5
- 2.Rxf5#
- 1...Qxe5
- 2.Qb3#
- 1...Bxe5
- 2.Qg2#
- 1...Kxe5
- Tries
- 1.Sc3+?
- 1...Kxe5
- 2.Sc4#
- 2.Bd4#
- 2.Re4#
- 2.Rxf5#
- 2.Qe3#
- 1...Bxc3!
- 1...Kxe5
- 1.Sc7+?
- 1...Kxe5
- 2.Sc4#
- 2.Re4#
- 2.Rxf5#
- 2.Qe3#
- 1...Qxc7!
- 1...Kxe5
- 1.Bd4?
- threat
- 2.Qg2#
- 2.Qb3#
- 1...Qxe5
- 2.Qb3#
- 1...Qxb5
- 2.Qg2#
- 1...c1Q
- 2.Qg2#
- 1...c1S
- 2.Qg2#
- 1...c1B
- 2.Qg2#
- 1...c1R
- 2.Qg2#
- 1...e1Q
- 2.Qb3#
- 1...e1S
- 2.Qb3#
- 1...e1B
- 2.Qb3#
- 1...e1R
- 2.Qb3#
- 1...Qc7
- 2.Sxc7#
- 2.Qg2#
- 1...Qc8
- 2.Qg2#
- 1...Ba1
- 2.Qg2#
- 1...Bc1
- 2.Sc3#
- 2.Qg2#
- 1...Ba3
- 2.Sc3#
- 2.Qg2#
- 1...Bc3
- 2.Sxc3#
- 2.Qg2#
- 1...Bxd4!
- threat
- 1.Be6+?
- 1...Kxe5
- 2.Rxf5#
- 1...Sxe6!
- 1...Kxe5
- 1.Rd4+?
- 1...Kc5
- 2.Sb3#
- 1...Bxd4!
- 1...Kc5
- 1.Rxf5?
- threat
- 2.Qg2#
- 2.Qb3#
- 1...Qxe5
- 2.Sc7#
- 1...Qxb5
- 2.Qg2#
- 1...Bxe5
- 2.Sc3#
- 1...Sxf5
- 2.Be6#
- 1...c1Q
- 2.Qg2#
- 1...c1S
- 2.Qg2#
- 1...c1B
- 2.Qg2#
- 1...c1R
- 2.Qg2#
- 1...e1Q
- 2.Qb3#
- 1...e1S
- 2.Qb3#
- 1...e1B
- 2.Qb3#
- 1...e1R
- 2.Qb3#
- 1...Qc7
- 2.Sxc7#
- 2.Qg2#
- 1...Qc8
- 2.Qg2#
- 1...Ba1
- 2.Qg2#
- 1...Bc1
- 2.Sc3#
- 2.Qg2#
- 2.Qd3#
- 1...Ba3
- 2.Sc3#
- 2.Qg2#
- 2.Qd3#
- 1...Bc3
- 2.Sxc3#
- 2.Qg2#
- 1...Bd4!
- threat
- 1.Qd3+?
- 1...Bd4
- 2.Qxd4#
- 1...Kxe5!
- 1...Bd4
- 1.Qf3+?
- 1...Kxe5
- 2.Sc4#
- 1...gxf3!
- 1...Kxe5
- 1.Sc3+?
- Keys
- 1.Ra5!
- threat
- 2.Sc3#
- 2.Sc7#
- 1...Kxe5
- 2.Rxf5#
- 1...Qxe5
- 2.Qb3#
- 1...Qxb5
- 2.Rxb5#
- 1...Bxe5
- 2.Qg2#
- 1...Qc7
- 2.Sc3#
- 2.Sxc7#
- 1...Bc3
- 2.Sxc3#
- 2.Sc7#
- threat
- 1.Ra5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(g);OGATEB,P-FLIGHT,XP(G)::QAB(D)+R(E),DCHECK,XP(h)
- Q(l);SBLOCK,XP(G)::QAB(D)
- B(c);SBLOCK,XP(G)::QAB(D)
- Tries
- Try
- S(F);CHECK
- Refutation
- B(c);XS(F)
- Try
- S(F);CHECK
- Refutation
- Q(l);XS(F)
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- Q(l);XP(G)::QAB(D)
- Q(l);XS(F)::QAB(D)
- P(d);::QAB(D)
- P(e);::QAB(D)
- Q(l);::QAB(D)
- B(c);::QAB(D)
- Refutation
- B(c);XB(A)
- Try
- B(I);CHECK
- Vars
- K(g);P-FLIGHT,XP(G)::QAB(D)+R(E),DCHECK,XP(h)
- Refutation
- S(j);XB(I)
- Try
- R(E);CHECK
- Vars
- K(g);P-FLIGHT::S(B)
- Refutation
- B(c);XR(E)
- Try
- R(E);XP(h)
- Threat
- DUALS(2)
- Vars
- Q(l);N_GUARD,P_PINQ(D),P_SPINQ(l),XP(G)::S(F)
- Q(l);XS(F)::QAB(D)
- B(c);N_GUARD,P_PINQ(D),P_SPINB(c),XP(G)::S(F)
- S(j);N_GUARD,XR(E)::B(I)
- P(d);::QAB(D)
- P(e);::QAB(D)
- Q(l);::QAB(D)
- B(c);::QAB(D)
- Refutation
- B(c);
- Try
- Q(D);CHECK
- Vars
- B(c);N_GUARD,P_SPINB(c)::QAR1(D),XB(c)
- Refutation
- K(g);P-FLIGHT,XP(G)
- Try
- Q(D);CHECK
- Vars
- K(g);P-FLIGHT,XP(G)::S(B)
- Refutation
- P(f);XQ(D)
- Try
- Actual
- R(H);
- Threat
- DUALS(2)
- Vars
- K(g);OGATEB,P-FLIGHT,XP(G)::QAB(D)+R(E),DCHECK,XP(h)
- Q(l);SBLOCK,XP(G)::QAB(D)
- Q(l);OGATE,P_SPINQ(l),XS(F)::R(H),XQ(l)
- B(c);SBLOCK,XP(G)::QAB(D)
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).