MESON Chess Problem Database
Problem Display
PID: 52074 (4Kn2/8/3R1Pp1/1N2kPB1/1p2P3/1n5Q/3qR1N1/1B1bb3 w - - 0 1)
Keller, Michael
1st Prize, Phenix, 1990
#2
11 + 8
| 4655 | Michael Keller Ein Meister der Schachkomposition | 1994 |
| 4827 | FIDE Album (1989-1991) | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Rd5#
- 1...Qc3
- 2.Bf4#
- 2.Rd5#
- 1...Qe3
- 2.Rd5#
- 1...Qf4
- 2.Bxf4#
- 2.Rd5#
- 1...Qa2
- 2.Bf4#
- 2.Rd5#
- 1...Qb2
- 2.Bf4#
- 2.Rd5#
- 1...Qc2
- 2.Bf4#
- 2.Rd5#
- 1...Qxe2
- 2.Bf4#
- 2.Rd5#
- 1...Qd3
- 2.Bf4#
- 1...Qd4
- 2.Bf4#
- 1...Qd5
- 2.Bf4#
- 2.Rxd5#
- 1...Sd4
- 2.Rd5#
- 1...Se6
- 2.Rxe6#
- 1...Sd7
- 2.Re6#
- 1...Sh7
- 2.Re6#
- 1...gxf5
- 2.Qxf5#
- 1...Qc1
- Tries
- 1.Sxe1?
- threat
- 2.Sf3#
- 1...Qxe1
- 2.Rd5#
- 1...Qxg5
- 2.Sd3#
- 1...Qxe2
- 2.Rd5#
- 2.Qg3#
- 1...Qc3
- 2.Rd5#
- 1...Qe3
- 2.Rd5#
- 1...Qf4
- 2.Sd3#
- 2.Rd5#
- 1...Qd3
- 2.Sxd3#
- 1...Sd4
- 2.Rd5#
- 1...Bxe2!
- threat
- 1.Se3?
- threat
- 2.Sc4#
- 2.Sg4#
- 1...Qxe3
- 2.Rd5#
- 1...Qxe2
- 2.Rd5#
- 1...gxf5
- 2.Sc4#
- 2.Qxf5#
- 1...Qc2
- 2.Sg4#
- 1...Qd3
- 2.Sg4#
- 1...Qc1
- 2.Sg4#
- 2.Rd5#
- 1...Qc3
- 2.Sg4#
- 2.Rd5#
- 1...Qd4
- 2.Sg4#
- 1...Qd5
- 2.Sg4#
- 2.Rxd5#
- 1...Sa5
- 2.Sg4#
- 1...Bxe2!
- threat
- 1.Bd3?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Bf4#
- 1...gxf5
- 2.Qxf5#
- 1...Qxg5!
- threat
- 1.Rexd2?
- threat
- 2.Bf4#
- 2.R2d5#
- 2.R6d5#
- 1...Bxd2
- 2.Rd5#
- 1...Sxd2
- 2.Bf4#
- 2.Rd5#
- 1...gxf5
- 2.Bf4#
- 2.R2d5#
- 2.Qxf5#
- 1...Bg3
- 2.R2d5#
- 2.R6d5#
- 2.Qxg3#
- 1...Sd4
- 2.Bf4#
- 2.Rd5#
- 1...Se6
- 2.R2d5#
- 2.R6d5#
- 2.Rxe6#
- 1...Bc2!
- threat
- 1.Re3?
- threat
- 2.Bf4#
- 1...Qxe3
- 2.Rd5#
- 1...Qxg2
- 2.Rd5#
- 1...Qf2
- 2.Rd5#
- 1...Bg3
- 2.Qxg3#
- 1...Se6
- 2.Rxe6#
- 1...Qxd6!
- threat
- 1.Qh2+?
- 1...Qf4
- 2.Bxf4#
- 2.Rd5#
- 2.Qxf4#
- 1...Bg3!
- 1...Qf4
- 1.Qc3+?
- 1...Qxc3
- 2.Bf4#
- 2.Rd5#
- 1...Qd4
- 2.Bf4#
- 2.Rd5#
- 1...Sd4
- 2.Rd5#
- 2.Qc5#
- 1...bxc3!
- 1...Qxc3
- 1.Qd3?
- threat
- 2.Rd5#
- 1...Qxg5
- 2.Qd5#
- 1...Qxd3
- 2.Bf4#
- 1...gxf5!
- threat
- 1.Qe3?
- threat
- 2.Bf4#
- 1...Qxe3
- 2.Rd5#
- 1...Qxd6
- 2.Qf4#
- 1...Se6
- 2.Rxe6#
- 1...Bg3!
- threat
- 1.Qg3+?
- 1...Qf4
- 2.Bxf4#
- 2.Rd5#
- 2.Qxf4#
- 1...Bxg3!
- 1...Qf4
- 1.fxg6?
- threat
- 2.Qf5#
- 1...Qf4
- 2.Bxf4#
- 2.Rd5#
- 1...Sd4
- 2.Rd5#
- 1...Qxg5!
- threat
- 1.Sxe1?
- Keys
- 1.Qh8!
- threat
- 2.f7#
- 1...Qxg5
- 2.Rd5#
- 1...Qxd6
- 2.Bf4#
- 1...Se6
- 2.Rxe6#
- 1...Sd7
- 2.Re6#
- 1...Sh7
- 2.Re6#
- threat
- 1.Qh8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(c);N_GUARD::R1(I)
- Q(c);N_GUARD::B(H)
- S(d);S_CUTQ(c)::R1(I)
- S(h);N_GUARD::R1(I),XS(h)
- S(h);N_GUARD::R1(I)
- P(g);OGATE,XP(G)::QAR1(D),XP(g)
- Tries
- Try
- S(C);XB(b)
- Threat
- S(C)
- Vars
- Q(c);N_GUARD,XS(C)::R1(I)
- Q(c);N_GUARD,XB(H)::S(C)
- Q(c);N_GUARD::R1(I)
- Q(c);N_GUARD::S(C),XQ(c)
- S(d);S_CUTQ(c)::R1(I)
- Refutation
- B(a);XR(B)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD,XS(C)::R1(I)
- Q(c);N_GUARD,XR(B)::R1(I)
- Q(c);::S(C)
- S(d);::S(C)
- Refutation
- B(a);XR(B)
- Try
- B(A);
- Threat
- R1(I)
- Vars
- Q(c);N_GUARD,XB(A)::B(H)
- P(g);OGATE,XP(G)::QAR1(D),XP(g)
- Refutation
- Q(c);XB(H)
- Try
- R(B);XQ(c)
- Threat
- DUALS(3)
- Vars
- B(b);XR(B)::R1(I)
- Refutation
- B(a);
- Try
- R(B);
- Threat
- B(H)
- Vars
- Q(c);N_GUARD,XR(B)::R1(I)
- Q(c);N_GUARD,XS(C)::R1(I)
- Q(c);N_GUARD::R1(I)
- B(b);N_GUARD::QAB(D),XB(b)
- S(h);N_GUARD::R1(I),XS(h)
- Refutation
- Q(c);XR(I)
- Try
- Q(D);CHECK
- Refutation
- B(b);P_SPINB(b)
- Try
- Q(D);CHECK
- Refutation
- P(e);XQ(D)
- Try
- Q(D);
- Threat
- R1(I)
- Vars
- Q(c);N_GUARD,XB(H)::QAR1(D)
- Q(c);N_GUARD,XQ(D)::B(H)
- Refutation
- P(g);XP(G)
- Try
- Q(D);
- Threat
- B(H)
- Vars
- Q(c);N_GUARD,XQ(D)::R1(I)
- Q(c);N_GUARD,XR(I)::QAB1(D)
- S(h);N_GUARD::R1(I),XS(h)
- Refutation
- B(b);
- Try
- Q(D);CHECK
- Refutation
- B(b);XQ(D)
- Try
- P(G);XP(g)
- Threat
- QAR1(D)
- Vars
- S(d);S_CUTQ(c)::R1(I)
- Refutation
- Q(c);XB(H)
- Try
- Actual
- Q(D);
- Threat
- QAB(D)+P(J)
- Vars
- Q(c);N_GUARD,XB(H)::R1(I)
- Q(c);N_GUARD,XR(I)::B(H)
- S(h);N_GUARD::R1(I),XS(h)
- S(h);N_GUARD::R1(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).