MESON Chess Problem Database
Problem Display
PID: 162125 (N1KQ4/pp1Bp2p/np2R1nR/1p1k3P/8/1NPPb3/4P3/8 w - - 0 1)
Kemp, Charles Edward
The Observer, 1924
(First published on Sun Feb 24 1924)
#2
11 + 10
| 15044 | Kemp Archive | 2013 |
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.e4#
- 1...Bg1
- 2.e4#
- 1...Bd2
- 2.e4#
- 1...Bf2
- 2.e4#
- 1...Bd4
- 2.e4#
- 1...Bf4
- 2.e4#
- 1...Bc5
- 2.e4#
- 1...Bg5
- 2.e4#
- 1...Bxh6
- 2.e4#
- 1...Sb4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sb8
- 2.Sc7#
- 1...Sf4
- 2.Bxb5#
- 2.Bc6#
- 2.Be8#
- 1...Sh4
- 2.Bxb5#
- 2.Bc6#
- 2.Be8#
- 1...Se5
- 2.Bc6#
- 1...Sf8
- 2.Bc6#
- 1...Sh8
- 2.Bxb5#
- 2.Bc6#
- 2.Be8#
- 1...b4
- 2.c4#
- 1...Bc1
- Tries
- 1.Kxb7?
- threat
- 2.Bc8#
- 1...Bf4
- 2.e4#
- 1...Bc5
- 2.e4#
- 1...Sb8
- 2.Sc7#
- 1...Se5
- 2.Bc6#
- 1...Sf8
- 2.Bc6#
- 1...Sc5+!
- threat
- 1.Sxb6+?
- 1...Bxb6
- 2.e4#
- 1...axb6!
- 1...Bxb6
- 1.Re5+?
- 1...Kd6
- 2.Qxe7#
- 1...Sxe5
- 2.Bc6#
- 1...Kxe5!
- 1...Kd6
- 1.Rhxg6?
- threat
- 2.Bxb5#
- 2.Bc6#
- 2.Be8#
- 1...Bf4
- 2.Bc6#
- 2.e4#
- 1...Bc5
- 2.Bc6#
- 2.Rg5#
- 2.e4#
- 1...Sc5
- 2.Sc7#
- 2.Bc6#
- 1...Sb8
- 2.Sc7#
- 2.Bc6#
- 1...b4
- 2.Ba4#
- 2.Bb5#
- 2.Bc6#
- 2.Be8#
- 2.c4#
- 1...hxg6!
- threat
- 1.Qxe7?
- threat
- 2.Rd6#
- 2.Qd6#
- 1...Bf4
- 2.e4#
- 1...Bc5
- 2.e4#
- 1...Sxe7+!
- threat
- 1.Qh8?
- 1...Bxh6
- 2.Qd4#
- 2.e4#
- 1...Sh4
- 2.Re5#
- 2.Qe5#
- 1...Bc1
- 2.Qd4#
- 2.e4#
- 1...Bg1
- 2.e4#
- 1...Bd2
- 2.Qd4#
- 2.e4#
- 1...Bf2
- 2.e4#
- 1...Bd4
- 2.Qxd4#
- 2.e4#
- 1...Bf4
- 2.Qd4#
- 2.e4#
- 1...Bc5
- 2.e4#
- 1...Bg5
- 2.Qd4#
- 2.e4#
- 1...Sb4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sb8
- 2.Sc7#
- 1...Sf4
- 2.Re5#
- 2.Qe5#
- 1...Se5
- 2.Rxe5#
- 2.Qxe5#
- 1...Sf8
- 2.Re5#
- 2.Qe5#
- 1...b4
- 2.c4#
- 1...Sxh8!
- 1...Bxh6
- 1.hxg6?
- 1...Bxh6
- 2.e4#
- 1...Bc1
- 2.e4#
- 1...Bg1
- 2.Rh5#
- 2.e4#
- 1...Bd2
- 2.e4#
- 1...Bf2
- 2.Rh5#
- 2.e4#
- 1...Bd4
- 2.e4#
- 1...Bf4
- 2.e4#
- 1...Bc5
- 2.Rh5#
- 2.e4#
- 1...Bg5
- 2.e4#
- 1...Sb4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sb8
- 2.Sc7#
- 1...b4
- 2.c4#
- 1...hxg6!
- 1...Bxh6
- 1.Kxb7?
- Keys
- 1.Qg8!
- 1...Bxh6
- 2.e4#
- 1...Sh4
- 2.Rxe7#
- 1...Bc1
- 2.e4#
- 1...Bg1
- 2.e4#
- 1...Bd2
- 2.e4#
- 1...Bf2
- 2.e4#
- 1...Bd4
- 2.e4#
- 1...Bf4
- 2.e4#
- 1...Bc5
- 2.e4#
- 1...Bg5
- 2.e4#
- 1...Sb4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sb8
- 2.Sc7#
- 1...Sf4
- 2.Qg5#
- 1...Se5
- 2.Rd6#
- 1...Sf8
- 2.Qg2#
- 1...Sh8
- 2.Qg2#
- 1...b4
- 2.c4#
- 1...Bxh6
- 1.Qg8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- B(a);OGATE::P(A)
- B(a);OGATE,XR(G)::P(A)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);::QAR(K)+B(H),DCHECK
- P(b);N_GUARD::P(C)
- Tries
- Try
- K(J);S_FLIGHT,XP(h)
- Threat
- QAR(K)+B(H)
- Vars
- B(a);OGATE::P(A)
- S(d);N_GUARD::S(I)
- S(f);::QAR(K)+B(H),DCHECK
- Refutation
- S(d);CHECK
- Try
- S(I);CHECK,XP(e)
- Vars
- B(a);OGATE,XS(I)::P(A)
- Refutation
- P(g);XS(I)
- Try
- R(F);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINS(f)::QAB1(K),XP(i)
- S(f);SBLOCK,XR(F)::QAR(K)+B(H),DCHECK
- Refutation
- K(c);P-FLIGHT,XR(F)
- Try
- R(G);XS(f)
- Threat
- DUALS(3)
- Refutation
- P(j);XR(G)
- Try
- Q(K);XP(i)
- Threat
- DUALS(2)
- Vars
- B(a);OGATE::P(A)
- Refutation
- S(f);CHECK,XQ(K)
- Try
- Q(K);
- Vars
- B(a);OGATE::P(A)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- P(b);N_GUARD::P(C)
- Refutation
- S(f);XQ(K)
- Try
- P(E);XS(f)
- Vars
- B(a);OGATE,XR(G)::P(A)
- B(a);OGATE::P(A)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- P(b);N_GUARD::P(C)
- Refutation
- P(j);XP(E)
- Try
- Actual
- Q(K);
- Vars
- B(a);OGATE,XR(G)::P(A)
- S(f);::QAB(K)+R(F),XP(i)
- B(a);OGATE::P(A)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);OGATE::QAR(K)
- S(f);SBLOCK::QAB(K)+R(F),DCHECK
- S(f);OGATE::QAB(K)
- P(b);N_GUARD::P(C)
Developed and maintained by Brian Stephenson.
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