MESON Chess Problem Database
Problem Display
PID: 165100 (2B1bbN1/2pppR1p/2N1k2P/2P4P/1p6/1K2nQ2/8/8 w - - 0 1)
Kelly, Vincent
The Observer, 1927
(First published on Sun Jun 12 1927)
#2
9 + 9
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Bxf7
- 2.Qe4#
- 1...Bxh6
- 2.Rxe7#
- 1...Bg7
- 2.Rxe7#
- 1...Sd1
- 2.Qf5#
- 1...Sf1
- 2.Qf5#
- 1...Sc2
- 2.Qf5#
- 1...Sg2
- 2.Qf5#
- 1...Sc4
- 2.Qf5#
- 1...Sg4
- 2.Qf5#
- 1...Sd5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Bxf7
- Tries
- 1.Ka2?
- 1...Bxf7
- 2.Qe4#
- 1...Bxh6
- 2.Rxe7#
- 1...Sf5
- 2.Qb3#
- 2.Qxf5#
- 1...Bg7
- 2.Rxe7#
- 1...Sd1
- 2.Qb3#
- 2.Qf5#
- 1...Sf1
- 2.Qb3#
- 2.Qf5#
- 1...Sc2
- 2.Qb3#
- 2.Qf5#
- 1...Sg2
- 2.Qb3#
- 2.Qf5#
- 1...Sc4
- 2.Qf5#
- 1...Sg4
- 2.Qb3#
- 2.Qf5#
- 1...Sd5
- 2.Qf5#
- 1...b3+!
- 1...Bxf7
- 1.Ka4?
- 1...Bxf7
- 2.Qe4#
- 1...Bxh6
- 2.Rxe7#
- 1...Sf5
- 2.Qb3#
- 2.Qxf5#
- 1...Bg7
- 2.Rxe7#
- 1...Sd1
- 2.Qb3#
- 2.Qf5#
- 1...Sf1
- 2.Qb3#
- 2.Qf5#
- 1...Sc2
- 2.Qb3#
- 2.Qf5#
- 1...Sg2
- 2.Qb3#
- 2.Qf5#
- 1...Sc4
- 2.Qf5#
- 1...Sg4
- 2.Qb3#
- 2.Qf5#
- 1...Sd5
- 2.Qf5#
- 1...b3!
- 1...Bxf7
- 1.Sxb4?
- 1...Ke5
- 2.Qxe3#
- 1...Bxf7
- 2.Qe4#
- 1...Bxh6
- 2.Rxe7#
- 1...Sf5
- 2.Qd5#
- 2.Qxf5#
- 1...Bg7
- 2.Rxe7#
- 1...Sd1
- 2.Qd5#
- 2.Qf5#
- 1...Sf1
- 2.Qd5#
- 2.Qf5#
- 1...Sc2
- 2.Qd5#
- 2.Qf5#
- 1...Sg2
- 2.Qd5#
- 2.Qf5#
- 1...Sc4
- 2.Qd5#
- 2.Qf5#
- 1...Sg4
- 2.Qd5#
- 2.Qf5#
- 1...Sd5
- 2.Qxd5#
- 2.Qf5#
- 1...c6!
- 1...Ke5
- 1.Scxe7?
- threat
- 2.Qf6#
- 1...Ke5
- 2.Qxe3#
- 1...Bxe7
- 2.Rxe7#
- 1...Sf5
- 2.Qd5#
- 2.Qxf5#
- 1...Sg4
- 2.Qd5#
- 2.Qf5#
- 1...Sd5
- 2.Qxd5#
- 2.Qf5#
- 1...Bg7!
- threat
- 1.Rf5?
- threat
- 2.Sd4#
- 2.Sd8#
- 2.Re5#
- 2.Qe4#
- 1...Bg7
- 2.Sd8#
- 1...Sc2
- 2.Sd8#
- 2.Re5#
- 2.Qe4#
- 2.Qd5#
- 1...Sc4
- 2.Sd4#
- 2.Sd8#
- 2.Qd5#
- 1...Sg4
- 2.Sd4#
- 2.Sd8#
- 2.Qd5#
- 1...Sxf5!
- threat
- 1.Rxf8?
- threat
- 2.Qe4#
- 1...Sc4
- 2.Qf5#
- 1...Sg4
- 2.Qf5#
- 1...Bg6!
- threat
- 1.Qxe3+?
- 1...Kd5
- 2.Sxb4#
- 1...Kxf7!
- 1...Kd5
- 1.Ka2?
- Keys
- 1.Sf6!
- 1...Kxf7
- 2.Sd8#
- 1...Bxf7
- 2.Bxd7#
- 1...Bxh6
- 2.Rxe7#
- 1...exf6
- 2.Rxf6#
- 1...Bg7
- 2.Rxe7#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sf5
- 2.Qd5#
- 1...Kxf7
- 1.Sf6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(h);SBLOCK,XR(G)::QAR2(B)
- B(i);N_GUARD,XP(F)::R1(G),XP(f)
- B(i);N_GUARD::R1(G),XP(f)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- B(h);SBLOCK,XR(G)::QAR2(B)
- B(i);N_GUARD,XP(F)::R1(G),XP(f)
- B(i);N_GUARD::R1(G),XP(f)
- S(a);N_GUARD::QAB1(B)
- Refutation
- P(b);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- B(h);SBLOCK,XR(G)::QAR2(B)
- B(i);N_GUARD,XP(F)::R1(G),XP(f)
- B(i);N_GUARD::R1(G),XP(f)
- S(a);N_GUARD::QAB1(B)
- Refutation
- P(b);
- Try
- S(E);XP(b)
- Vars
- K(c);N_SPINP(e),P-FLIGHT::QAR2(B),XS(a)
- B(h);SBLOCK,XR(G)::QAR2(B)
- B(i);N_GUARD,XP(F)::R1(G),XP(f)
- B(i);N_GUARD::R1(G),XP(f)
- Refutation
- P(d);
- Try
- S(E);XP(f)
- Threat
- QAR1(B)
- Vars
- K(c);N_SPINP(e),P-FLIGHT::QAR2(B),XS(a)
- B(i);OGATE,XS(E)::R1(G),XB(i)
- Refutation
- B(i);
- Try
- R(G);
- Threat
- DUALS(4)
- Vars
- B(i);::S(E)
- Refutation
- S(a);XR(G)
- Try
- R(G);XB(i)
- Threat
- QAR2(B)
- Vars
- S(a);N_GUARD::QAB1(B)
- Refutation
- B(h);
- Try
- Q(B);CHECK,XS(a)
- Vars
- K(c);N_SPINP(e),S_FLIGHT::S(E),XP(b)
- Refutation
- K(c);N_SPINP(e),S_FLIGHT,XR(G)
- Try
- Actual
- S(I);
- Vars
- K(c);N_SPINP(e),S_FLIGHT,XR(G)::S(E)
- B(h);N_GUARD,SBLOCK,XR(G)::B(H),XP(e)
- B(i);N_GUARD,XP(F)::R1(G),XP(f)
- P(f);OGATE,XS(I)::R1(G),XP(f)
- B(i);N_GUARD::R1(G),XP(f)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
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