MESON Chess Problem Database
Problem Display
PID: 11850 (q1b5/4p2r/pQ6/R3NpBp/2pNkP2/2Ppp3/3PR1n1/2b4K w - - 0 1)
Keller, Michael
1st Prize, Schach-Echo, 1972/I
#2
10 + 13
| 328 | Schweizerische Schachzeitung | 1972 |
| 3753 | FIDE Album (1971-1973) | 1978 |
| 4655 | Michael Keller Ein Meister der Schachkomposition | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Qc6
- 2.Qxc6#
- 1...Qa7
- 2.Qc6#
- 1...Qb8
- 2.Qc6#
- 1...Se1
- 2.Rxe3#
- 1...Sxf4
- 2.Rxe3#
- 1...Sh4
- 2.Rxe3#
- 1...dxe2
- 2.Qb1#
- 1...Qc6
- Tries
- 1.Kxg2?
- threat
- 2.Rxe3#
- 1...dxe2
- 2.Qb1#
- 1...Bxd2!
- threat
- 1.Sc2?
- threat
- 2.Qd4#
- 1...Qa7
- 2.Qc6#
- 1...Qd5!
- threat
- 1.Sb3?
- threat
- 2.Qd4#
- 1...Qa7
- 2.Qc6#
- 1...Qd5!
- threat
- 1.Sdf3?
- threat
- 2.Qd4#
- 1...Qa7
- 2.Qc6#
- 1...Qd5!
- threat
- 1.Sxf5?
- threat
- 2.Sg3#
- 1...Kxf5
- 2.Qg6#
- 1...Bxf5
- 2.Qd4#
- 1...h4!
- threat
- 1.Se6?
- threat
- 2.Qd4#
- 1...Qa7
- 2.Qc6#
- 1...Qd5!
- threat
- 1.Sef3?
- threat
- 2.Re5#
- 1...dxe2
- 2.Qb1#
- 1...Qb8
- 2.Qc6#
- 1...e5
- 2.Rxe5#
- 1...Qd5!
- threat
- 1.Sxc4?
- threat
- 2.Re5#
- 1...dxe2
- 2.Qb1#
- 1...Qb8
- 2.Qc6#
- 1...e5
- 2.Sd6#
- 2.Rxe5#
- 1...Qd5!
- threat
- 1.Sg4?
- threat
- 2.Sf2#
- 2.Re5#
- 1...dxe2
- 2.Qb1#
- 1...fxg4
- 2.Re5#
- 1...Qd5
- 2.Sf2#
- 1...Qb8
- 2.Sf2#
- 2.Qc6#
- 1...e5
- 2.Sf2#
- 2.Sf6#
- 2.Rxe5#
- 1...hxg4+!
- threat
- 1.Sec6?
- threat
- 2.Re5#
- 1...dxe2
- 2.Qb1#
- 1...e5
- 2.Rxe5#
- 1...Qb8!
- threat
- 1.Sg6?
- threat
- 2.Re5#
- 1...dxe2
- 2.Qb1#
- 1...Qb8
- 2.Qc6#
- 1...e5
- 2.Rxe5#
- 1...Qd5!
- threat
- 1.Sd7?
- threat
- 2.Re5#
- 2.Qe6#
- 1...Bxd7
- 2.Re5#
- 1...Sxf4
- 2.Rxe3#
- 2.Re5#
- 1...dxe2
- 2.Qb1#
- 1...Qc6
- 2.Re5#
- 2.Qxc6#
- 1...Qb8
- 2.Qc6#
- 1...Rh6
- 2.Re5#
- 1...e5
- 2.Sf6#
- 2.Rxe5#
- 1...e6
- 2.Sf6#
- 2.Re5#
- 2.Qxe6#
- 1...Qd5!
- threat
- 1.Sf7?
- threat
- 2.Re5#
- 1...dxe2
- 2.Qb1#
- 1...Qb8
- 2.Qc6#
- 1...e5
- 2.Sd6#
- 2.Rxe5#
- 1...Qd5!
- threat
- 1.Kxg2?
- Keys
- 1.Sxd3!
- threat
- 2.Sf2#
- 1...Kxd3
- 2.Qb1#
- 1...cxd3
- 2.Re5#
- threat
- 1.Sxd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(l);N_GUARD::QAB(J),XQ(l)
- Q(l);N_GUARD::QAB(J)
- S(b);N_GUARD::R1(C),XP(d)
- S(b);N_GUARD,XP(F)::R1(C),XP(d)
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- Tries
- Try
- K(A);S_FLIGHT,XS(b)
- Threat
- R1(C),XP(d)
- Vars
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- Refutation
- B(a);XP(B)
- Try
- S(E);
- Threat
- QAR1(J)
- Vars
- Q(l);N_GUARD::QAB(J)
- Refutation
- Q(l);
- Try
- S(E);
- Threat
- QAR1(J)
- Vars
- Q(l);N_GUARD::QAB(J)
- Refutation
- Q(l);
- Try
- S(E);
- Threat
- QAR1(J)
- Vars
- Q(l);N_GUARD::QAB(J)
- Refutation
- Q(l);
- Try
- S(E);XP(g)
- Threat
- S(E)
- Vars
- K(f);N_SPINP(d),OGATEB,S_FLIGHT,XS(E)::QAB1(J)
- B(m);SBLOCK,XS(E)::QAR1(J)
- Refutation
- P(h);
- Try
- S(E);
- Threat
- QAR1(J)
- Vars
- Q(l);N_GUARD::QAB(J)
- Refutation
- Q(l);
- Try
- S(H);
- Threat
- R1(G)
- Vars
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- Q(l);N_GUARD::QAB(J)
- P(j);::R1(G),XP(j)
- Refutation
- Q(l);
- Try
- S(H);XP(e)
- Threat
- R1(G)
- Vars
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- Q(l);N_GUARD::QAB(J)
- Refutation
- Q(l);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- P(g);XS(H)::R1(G)
- Q(l);::S(H)
- Refutation
- P(h);CHECK,XS(H)
- Try
- S(H);
- Threat
- R1(G)
- Vars
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- P(j);::R1(G),XP(j)
- Refutation
- Q(l);
- Try
- S(H);
- Threat
- R1(G)
- Vars
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- Q(l);N_GUARD::QAB(J)
- P(j);::R1(G),XP(j)
- Refutation
- Q(l);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- B(m);XS(H)::R1(G)
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- Q(l);N_GUARD::QAB(J)
- R(k);::R1(G)
- Refutation
- Q(l);
- Try
- S(H);
- Threat
- R1(G)
- Vars
- P(c);N_SPINP(d),OGATEB,XR(C)::QAB(J)
- Q(l);N_GUARD::QAB(J)
- Refutation
- Q(l);
- Try
- Actual
- S(H);XP(c)
- Threat
- S(H)
- Vars
- K(f);N_SPINP(d),OGATEB,S_FLIGHT,XS(H)::QAB(J)
- P(e);SBLOCK,XS(H)::R1(G)
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