MESON Chess Problem Database
Problem Display
PID: 15215 (5bNn/3Bpp1n/2R5/1r1kp3/5P2/Q1pp1P2/N1q3pK/5bB1 w - - 0 1)
Keller, Michael
1st HM., Die Schwalbe, 1981
#2
9 + 13
| 3752 | FIDE Album (1980-1982) | 1988 |
| 273 | Mat Plus | 1994 |
| 4655 | Michael Keller Ein Meister der Schachkomposition | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxc3#
- 1...Qd1
- 2.Sxc3#
- 1...Qa4
- 2.Sxc3#
- 1...Qe2
- 2.Sxc3#
- 1...Rb1
- 2.Qc5#
- 1...Rb2
- 2.Qc5#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 2.Qxa5#
- 1...Rc5
- 2.Qxc5#
- 1...Rb6
- 2.Qc5#
- 1...Rb7
- 2.Qc5#
- 1...Rb8
- 2.Qc5#
- 1...Bh6
- 2.Sxe7#
- 1...Bg7
- 2.Sxe7#
- 1...Qb1
- Tries
- 1.Rc5+?
- 1...Rxc5
- 2.Qxc5#
- 1...Kd6!
- 1...Rxc5
- 1.Qb4?
- threat
- 2.Qc4#
- 2.Qe4#
- 2.Qxb5#
- 1...Qxa2
- 2.Qe4#
- 2.Qxb5#
- 1...Rxb4
- 2.Sxb4#
- 1...exf4
- 2.Qd4#
- 2.Qe4#
- 2.Qxb5#
- 1...Qb1
- 2.Sxc3#
- 2.Qc4#
- 2.Qe4#
- 1...Qb3
- 2.Qe4#
- 1...Qa4
- 2.Sxc3#
- 1...Qb2
- 2.Qc4#
- 2.Qe4#
- 1...Qe2
- 2.Sxc3#
- 2.Qc4#
- 2.Qxb5#
- 1...Qf2
- 2.Sxc3#
- 2.Qc4#
- 2.Qe4#
- 1...Ra5
- 2.Qxa5#
- 2.Qc4#
- 2.Qe4#
- 1...Rc5
- 2.Qxc5#
- 2.Qe4#
- 1...Rb6
- 2.Qc5#
- 2.Qc4#
- 2.Qe4#
- 1...Rb7
- 2.Qc5#
- 2.Qc4#
- 2.Qe4#
- 1...Rb8
- 2.Qc5#
- 2.Qc4#
- 2.Qe4#
- 1...Sg5
- 2.Qc4#
- 2.Qxb5#
- 1...Sf6
- 2.Qc4#
- 2.Qxb5#
- 1...e4
- 2.Qc4#
- 2.Qd4#
- 2.Qxe4#
- 2.Qxb5#
- 2.fxe4#
- 1...e6
- 2.Qc4#
- 2.Qe4#
- 1...f5
- 2.Qc4#
- 2.Qxb5#
- 1...d2!
- threat
- 1.Qxc3?
- threat
- 2.Qxe5#
- 1...Qxc3
- 2.Sxc3#
- 1...exf4
- 2.Qd4#
- 1...Qb2
- 2.Qc4#
- 1...Qe2
- 2.Qc4#
- 1...Rc5
- 2.Sb4#
- 1...Bg7
- 2.Sxe7#
- 1...e4
- 2.Qd4#
- 2.Qe5#
- 1...f6
- 2.Be6#
- 1...Sg6!
- threat
- 1.Qa4?
- threat
- 2.Qxb5#
- 2.Qc4#
- 2.Qe4#
- 1...Qxa4
- 2.Sxc3#
- 1...Qxa2
- 2.Qxb5#
- 2.Qe4#
- 1...exf4
- 2.Qxb5#
- 2.Qd4#
- 2.Qe4#
- 1...Qb1
- 2.Sxc3#
- 2.Qc4#
- 2.Qe4#
- 1...Qb3
- 2.Qe4#
- 1...Qb2
- 2.Qc4#
- 2.Qe4#
- 1...Qe2
- 2.Sxc3#
- 2.Qxb5#
- 2.Qc4#
- 1...Qf2
- 2.Sxc3#
- 2.Qc4#
- 2.Qe4#
- 1...Rb1
- 2.Qc4#
- 2.Qe4#
- 1...Rb2
- 2.Qc4#
- 2.Qe4#
- 1...Rb3
- 2.Qc4#
- 2.Qe4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 2.Qc4#
- 2.Qe4#
- 2.Qxa5#
- 1...Rc5
- 2.Qe4#
- 1...Rb6
- 2.Qc4#
- 2.Qe4#
- 1...Rb7
- 2.Qc4#
- 2.Qe4#
- 1...Rb8
- 2.Qc4#
- 2.Qe4#
- 1...Sg5
- 2.Qxb5#
- 2.Qc4#
- 1...Sf6
- 2.Qxb5#
- 2.Qc4#
- 1...e4
- 2.Qxb5#
- 2.Qc4#
- 2.Qd4#
- 2.Qxe4#
- 2.fxe4#
- 1...e6
- 2.Qc4#
- 2.Qe4#
- 1...f5
- 2.Qxb5#
- 2.Qc4#
- 1...d2!
- threat
- 1.Rc5+?
- Keys
- 1.Qxe7!
- threat
- 2.Qxe5#
- 1...Bxe7
- 2.Sxe7#
- 1...exf4
- 2.Qe4#
- 1...Rc5
- 2.Rxc5#
- 1...Qe2
- 2.Sxc3#
- 1...Bg7
- 2.Qd6#
- 1...Sg6
- 2.Qxf7#
- 1...e4
- 2.Qxe4#
- 2.Qe5#
- 2.fxe4#
- 1...f6
- 2.Qe6#
- threat
- 1.Qxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 11
- Sets
- Q(b);N_GUARD::S(B),XP(d)
- R(f);N_GUARD::QAR1(D)
- R(f);N_GUARD::S(B),XR(f)
- R(f);N_GUARD::QAR1(D),XR(f)
- B(l);N_GUARD::S(I),XP(i)
- Tries
- Try
- R(G);CHECK
- Vars
- R(f);OGATE,XR(G)::QAR1(D),XR(f)
- Refutation
- K(g);P-FLIGHT
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- R(f);XQ(D)::S(B),XR(f)
- Q(b);::QAB1(D)
- Q(b);N_GUARD::S(B),XP(d)
- Refutation
- P(e);
- Try
- Q(D);XP(d)
- Threat
- QAR1(D),XP(h)
- Vars
- Q(b);XQ(D)::S(B),XQ(b)
- P(h);N_GUARD,XP(F)::QAR1(D)
- Q(b);N_GUARD::QAB1(D)
- R(f);N_GUARD::S(B)
- B(l);N_GUARD::S(I),XP(i)
- P(j);N_GUARD::B(H)
- Refutation
- S(m);
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- Q(b);N_GUARD,XQ(D)::S(B),XP(d)
- Q(b);::QAB1(D)
- R(f);N_GUARD::S(B),XR(f)
- R(f);::QAB1(D)
- Refutation
- P(e);
- Try
- Actual
- Q(D);XP(i)
- Threat
- QAR1(D),XP(h)
- Vars
- B(l);XQ(D)::S(I),XB(l)
- P(h);OGATE,XP(F)::QAB1(D)
- R(f);N_GUARD::R1(G),XR(f)
- Q(b);N_GUARD::S(B),XP(d)
- B(l);N_GUARD::QAR1(D)
- S(m);N_GUARD::QAB(D),XP(j)
- P(j);N_GUARD::QAB1(D)
Developed and maintained by Brian Stephenson.
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