MESON Chess Problem Database
Problem Display
PID: 197448 (6Q1/5p2/2p2B2/1nK1PkNb/2Np1p2/3P1p1P/5P2/8 w - - 0 1)
Sher, H
The Observer, 1944
(First published on Sun Jan 30 1944)
#2
9 + 8
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bg4
- 2.Qh7#
- 1...Bg6
- 2.Qc8#
- 1...Sa3
- 2.Sd6#
- 1...Sc3
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Bg4
- Tries
- 1.Kb4?
- 1...Bg4
- 2.Qh7#
- 1...Bg6
- 2.Qc8#
- 1...Sa3
- 2.Sd6#
- 1...Sc3
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...c5+!
- 1...Bg4
- 1.Kb6?
- 1...Bg4
- 2.Qh7#
- 1...Bg6
- 2.Qc8#
- 1...Sa3
- 2.Sd6#
- 1...Sc3
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...c5!
- 1...Bg4
- 1.Kxc6?
- 1...Bg4
- 2.Qh7#
- 1...Bg6
- 2.Qc8#
- 1...Sa3
- 2.Sd6#
- 1...Sc3
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sc7
- 2.Sd6#
- 1...Sa7+!
- 1...Bg4
- 1.Sxf3?
- 1...Ke6
- 2.Qc8#
- 1...Sc3
- 2.Sxd4#
- 1...Bg4
- 2.Qxg4#
- 1...Bg6
- 2.Qc8#
- 1...Sa3
- 2.Sxd4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Bxf3!
- 1...Ke6
- 1.Sxf7?
- threat
- 2.Sh6#
- 1...Bxf7
- 2.Qg4#
- 1...Ke6!
- threat
- 1.Qxf7?
- 1...Sc3
- 2.Sd6#
- 1...Bg4
- 2.Be7#
- 2.Bd8#
- 2.Qh7#
- 1...Bg6
- 2.Qe6#
- 2.Qd7#
- 1...Sa3
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Bxf7!
- 1...Sc3
- 1.Qg7?
- 1...Sc3
- 2.Sd6#
- 1...Bg4
- 2.Qh7#
- 1...Sa3
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Bg6!
- 1...Sc3
- 1.Kb4?
- Keys
- 1.Se6!
- 1...Kxe6
- 2.Qc8#
- 1...fxe6
- 2.Qg5#
- 1...Sc3
- 2.Sxd4#
- 1...Bg4
- 2.Qxg4#
- 1...Bg6
- 2.Sg7#
- 1...Sa3
- 2.Sxd4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Kxe6
- 1.Se6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(f);N_GUARD::QAB(I)
- B(f);SBLOCK::QAB(I)
- S(d);N_GUARD::S(D)
- S(d);N_GUARD::S(D),XS(d)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- B(f);N_GUARD::QAB(I)
- B(f);SBLOCK::QAB(I)
- S(d);N_GUARD::S(D)
- S(d);N_GUARD::S(D),XS(d)
- Refutation
- P(g);CHECK
- Try
- K(E);S_FLIGHT
- Vars
- B(f);N_GUARD::QAB(I)
- B(f);SBLOCK::QAB(I)
- S(d);N_GUARD::S(D)
- S(d);N_GUARD::S(D),XS(d)
- Refutation
- P(g);
- Try
- K(E);P-FLIGHT,XP(g)
- Vars
- B(f);N_GUARD::QAB(I)
- B(f);SBLOCK::QAB(I)
- S(d);N_GUARD::S(D)
- S(d);N_GUARD::S(D),XS(d)
- Refutation
- S(d);CHECK
- Try
- S(G);XP(a)
- Vars
- K(e);P_SPINP(h),S_FLIGHT::QAB(I)
- S(d);N_GUARD::S(G),XP(b)
- B(f);N_GUARD::QAB1(I),XB(f)
- B(f);SBLOCK::QAB(I)
- Refutation
- B(f);XS(G)
- Try
- S(G);XP(h)
- Threat
- S(G)
- Vars
- B(f);N_GUARD,XS(G)::QAB1(I)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(I);XP(h)
- Vars
- S(d);N_GUARD::S(D)
- S(d);N_GUARD::S(D),XS(d)
- Refutation
- B(f);XQ(I)
- Try
- Q(I);
- Vars
- S(d);N_GUARD::S(D)
- B(f);N_GUARD::QAB(I)
- S(d);N_GUARD::S(D),XS(d)
- Refutation
- B(f);
- Try
- Actual
- S(G);
- Vars
- K(e);OGATEB,P_SPINP(h),S_FLIGHT,XS(G)::QAB(I)
- P(h);SBLOCK,XS(G)::QAR1(I)
- S(d);N_GUARD::S(G),XP(b)
- B(f);N_GUARD::QAB1(I),XB(f)
- B(f);SBLOCK::S(G)
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