MESON Chess Problem Database
Problem Display
PID: 196510 (4n3/pQ2N3/B3p3/3r3N/3Bk2K/4P3/2b1P3/7n w - - 0 1)
Dale, John
The Observer, 1943
(First published on Sun Aug 22 1943)
#2
8 + 7
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bb1
- 2.Qxb1#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Ba4
- 2.Bd3#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e5
- 2.Qxd5#
- 1...Bb1
- Tries
- 1.Kh3?
- 1...Bb1
- 2.Qxb1#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Ba4
- 2.Bd3#
- 1...Sg3
- 2.Sxg3#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e5
- 2.Qxd5#
- 1...Sf2+!
- 1...Bb1
- 1.Kg4?
- 1...Sf6+
- 2.Sxf6#
- 1...Bb1
- 2.Qxb1#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 2.exd3#
- 1...Ba4
- 2.Bd3#
- 1...Sg3
- 2.Sxg3#
- 1...Sd6
- 2.Sf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e5
- 2.Qxd5#
- 1...Sf2+!
- 1...Sf6+
- 1.Qc6?
- threat
- 2.Qxc2#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Ba4
- 2.Bd3#
- 1...Sf2
- 2.Sg3#
- 1...Bb1!
- threat
- 1.Qa8?
- 1...Sd6
- 2.Sf6#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Ba4
- 2.Bd3#
- 1...Sf2
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sg7
- 2.Sf6#
- 1...e5
- 2.Qxd5#
- 1...Bb1!
- 1...Sd6
- 1.Qc7?
- threat
- 2.Qf4#
- 2.Qxc2#
- 1...Rxd4
- 2.Qf4#
- 1...Sxc7
- 2.Sf6#
- 1...Sd6
- 2.Sf6#
- 2.Qxc2#
- 1...Rc5
- 2.Qf4#
- 1...Re5
- 2.Qxe5#
- 2.Qxc2#
- 1...Rf5
- 2.Qxc2#
- 1...Rd6
- 2.Qxc2#
- 1...Bb1
- 2.Qf4#
- 1...Bd1
- 2.Bd3#
- 2.Qf4#
- 1...Bb3
- 2.Bd3#
- 2.Qf4#
- 1...Bd3
- 2.Bxd3#
- 2.Qf4#
- 1...Ba4
- 2.Bd3#
- 2.Qf4#
- 1...Sf2
- 2.Sg3#
- 2.Qf4#
- 1...e5
- 2.Qxc2#
- 1...Rxh5+!
- threat
- 1.Kh3?
- Keys
- 1.Sc8!
- 1...Kf5
- 2.Qh7#
- 1...Sf2
- 2.Sg3#
- 1...Bb1
- 2.Qxb1#
- 1...Bd1
- 2.Bd3#
- 1...Bb3
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Ba4
- 2.Bd3#
- 1...Sg3
- 2.Sxg3#
- 1...Sd6
- 2.Sxd6#
- 1...Sf6
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...e5
- 2.Qh7#
- 1...Kf5
- 1.Sc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(b);OGATEB::QAB(G),XB(b)
- B(b);N_GUARD::B(F)
- B(b);N_GUARD::B(F),XB(b)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(e);N_GUARD::QAB1(G),XR(d)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- B(b);OGATEB::QAB(G),XB(b)
- B(b);N_GUARD::B(F)
- B(b);N_GUARD::B(F),XB(b)
- S(a);N_GUARD::S(E),XS(a)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(e);N_GUARD::QAB1(G),XR(d)
- Refutation
- S(a);CHECK
- Try
- K(D);P-FLIGHT
- Vars
- S(g);CHECK,N_GUARD::S(E),XS(g)
- B(b);OGATEB::QAB(G),XB(b)
- B(b);N_GUARD,P_PINP(A)::B(F)
- B(b);N_GUARD::B(F)
- S(a);N_GUARD::S(E),XS(a)
- S(g);N_GUARD::S(E)
- P(e);N_GUARD::QAB1(G),XR(d)
- Refutation
- S(a);CHECK
- Try
- Q(G);
- Threat
- QAB(G),XB(b)
- Vars
- B(b);N_GUARD::B(F)
- B(b);N_GUARD::B(F),XB(b)
- S(a);N_GUARD::S(E)
- Refutation
- B(b);
- Try
- Q(G);
- Vars
- S(g);N_GUARD::S(E)
- B(b);N_GUARD::B(F)
- B(b);N_GUARD::B(F),XB(b)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(g);N_GUARD::S(E),XS(g)
- P(e);N_GUARD::QAB1(G),XR(d)
- Refutation
- B(b);
- Try
- Q(G);N_PINR(d)
- Threat
- DUALS(2)
- Vars
- R(d);XB(C)::QAR1(G)
- S(g);N_GUARD,XQ(G)::S(E)
- R(d);::QAR1(G)
- R(d);::QAB(G),XB(b)
- B(b);::QAR1(G)
- P(e);::QAB(G),XB(b)
- Refutation
- R(d);CHECK,XS(E)
- Try
- Actual
- S(H);
- Vars
- K(c);N_SPINR(d),S_FLIGHT::QAB(G)
- S(a);N_GUARD::S(E)
- B(b);OGATEB::QAB(G),XB(b)
- B(b);N_GUARD::B(F)
- B(b);N_GUARD::B(F),XB(b)
- S(a);N_GUARD::S(E),XS(a)
- S(g);N_GUARD::S(H),XS(g)
- S(g);N_GUARD::S(H)
- P(e);::QAB(G)
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