MESON Chess Problem Database
Problem Display
PID: 227296 (1n1Q3B/4Np1K/7b/5N2/r2pkp1R/q7/bPP1PP2/4n3 w - - 0 1)
Keller, Michael
Deutsche Schachzeitung, 1977
#2
10 + 10
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxb2
- 2.Sg3#
- 2.Sd6#
- 1...Qb4
- 2.Sg3#
- 1...Qc5
- 2.Sg3#
- 1...Qd6
- 2.Sg3#
- 2.Sxd6#
- 1...Qxe7
- 2.Sg3#
- 1...Qb3
- 2.Sd6#
- 1...Qc3
- 2.Sd6#
- 1...Qd3
- 2.Sd6#
- 1...Qe3
- 2.Sd6#
- 1...Qf3
- 2.Sd6#
- 1...Qg3
- 2.Sxg3#
- 2.Sd6#
- 1...Qh3
- 2.Sd6#
- 1...Rb4
- 2.Sd6#
- 1...Rc4
- 2.Qd5#
- 1...Ra5
- 2.Qxd4#
- 1...Ra6
- 2.Qxd4#
- 1...Ra7
- 2.Qxd4#
- 1...Ra8
- 2.Qxd4#
- 1...Bb1
- 2.Qd5#
- 1...Bb3
- 2.Sg3#
- 1...Bc4
- 2.Qxd4#
- 1...Bd5
- 2.Qxd5#
- 1...Sd3
- 2.Sg3#
- 2.f3#
- 1...Sf3
- 2.Sg3#
- 1...d3
- 2.Sg3#
- 1...Qxb2
- Tries
- 1.b4?
- threat
- 2.Sd6#
- 2.Qxd4#
- 1...Qxb4
- 2.Sg3#
- 1...Rxb4
- 2.Sd6#
- 1...Sxc2
- 2.Sd6#
- 1...f6
- 2.Qxd4#
- 1...Qb2
- 2.Sg3#
- 2.Sd6#
- 1...Qc3
- 2.Sd6#
- 1...Qd3
- 2.Sd6#
- 1...Qe3
- 2.Sd6#
- 1...Ra6
- 2.Qxd4#
- 1...Bd5
- 2.Sd6#
- 2.Qxd5#
- 1...Sf3
- 2.Sg3#
- 2.Sd6#
- 1...Sc6
- 2.Sd6#
- 1...Sd7
- 2.Sd6#
- 1...d3
- 2.Sg3#
- 2.Sd6#
- 2.Qd4#
- 1...Bg7!
- threat
- 1.c4?
- threat
- 2.Qxd4#
- 2.Qd5#
- 1...Qxb2
- 2.Sg3#
- 2.Sd6#
- 2.Qd5#
- 1...Qxe7
- 2.Sg3#
- 2.Qd5#
- 1...Rxc4
- 2.Qd5#
- 1...Bxc4
- 2.Qxd4#
- 1...dxc4 ep
- 2.Sg3#
- 1...Bg7
- 2.Qd5#
- 1...Ra5
- 2.Qxd4#
- 1...Qc5
- 2.Sg3#
- 1...Qd6
- 2.Sg3#
- 2.Sxd6#
- 1...Qc3
- 2.Sd6#
- 2.Qd5#
- 1...Qd3
- 2.Sd6#
- 2.Qd5#
- 1...Qe3
- 2.Sd6#
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sf3
- 2.Sg3#
- 2.Qd5#
- 1...Sc6
- 2.Qd5#
- 1...d3
- 2.Sg3#
- 2.Qd4#
- 2.Qd5#
- 1...Sd7!
- threat
- 1.b4?
- Keys
- 1.b3!
- threat
- 2.Sg3#
- 2.Qd5#
- 1...Qxe7
- 2.Sg3#
- 1...Qxb3
- 2.Sd6#
- 1...Bxb3
- 2.Sg3#
- 1...Bg7
- 2.Qd5#
- 1...f6
- 2.Qd5#
- 1...Ra5
- 2.Sg3#
- 2.Qxd4#
- 1...Qc5
- 2.Sg3#
- 1...Qd6
- 2.Sg3#
- 2.Sxd6#
- 1...Sd7
- 2.Sg3#
- threat
- 1.b3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 17
- Sets
- Q(c);N_GUARD::S(F)
- Q(c);N_GUARD,XS(G)::S(F)
- R(d);S_CUTQ(c)::S(F)
- R(d);S_CUTB(b)::QAB1(I)
- R(d);N_GUARD::QAR1(I),XP(e)
- B(b);N_GUARD::QAB1(I)
- B(b);S_CUTQ(c)::S(F)
- B(b);S_CUTR(d)::QAR1(I),XP(e)
- B(b);N_GUARD::QAB1(I),XB(b)
- S(a);S_CUTQ(c)::S(F)
- P(e);S_CUTQ(c)::S(F)
- Tries
- Try
- P(A);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD,XP(A)::S(F)
- R(d);XP(A)::S(F)
- S(a);XP(B)::S(F)
- P(i);::QAR1(I),XP(e)
- Q(c);::S(F)
- R(d);::QAR1(I),XP(e)
- S(j);::S(F)
- Refutation
- B(h);
- Try
- P(B);
- Threat
- DUALS(2)
- Vars
- R(d);XP(B)::QAB1(I)
- B(b);XP(B)::QAR1(I),XP(e)
- P(e);EP,S_CUTQ(c),XP(B)::S(F)
- B(h);::QAB1(I)
- R(d);::QAR1(I),XP(e)
- Q(c);N_GUARD::S(F)
- S(a);::QAB1(I)
- S(j);::QAB1(I)
- Refutation
- S(j);
- Try
- Actual
- P(A);
- Threat
- DUALS(2)
- Vars
- Q(c);XS(G)::S(F)
- Q(c);N_GUARD,XP(A)::S(F)
- B(b);XP(A)::S(F)
- B(h);::QAB1(I)
- P(i);::QAB1(I)
- Q(c);::S(F)
- S(j);::S(F)
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