MESON Chess Problem Database
Problem Display
PID: 187996 (1Q3N2/8/2k4n/2p3p1/2PbK2p/7p/5P1P/2n4B w - - 0 1)
Montgomerie, John
The Observer, 1936
(First published on Sun Jul 5 1936)
#2
7 + 8
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ba1
- 2.Ke3#
- 1...Bb2
- 2.Ke3#
- 1...Bxf2
- 2.Ke5#
- 1...Bc3
- 2.Ke3#
- 1...Be3
- 2.Kxe3#
- 2.Ke5#
- 1...Be5
- 2.Ke3#
- 2.Kxe5#
- 1...Bf6
- 2.Ke3#
- 1...Bg7
- 2.Ke3#
- 1...Bh8
- 2.Ke3#
- 1...Sa2
- 2.Kd3#
- 1...Se2
- 2.Kd3#
- 1...Sb3
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Sg4
- 2.Kf5#
- 1...Sf5
- 2.Kxf5#
- 1...Sf7
- 2.Kf5#
- 1...Sg8
- 2.Kf5#
- 1...g4
- 2.Kf4#
- 1...Ba1
- Tries
- 1.Bf3?
- 1...Bxf2
- 2.Ke5#
- 1...Ba1
- 2.Ke3#
- 1...Bb2
- 2.Ke3#
- 1...Bc3
- 2.Ke3#
- 1...Be3
- 2.Kxe3#
- 2.Ke5#
- 1...Be5
- 2.Ke3#
- 2.Kxe5#
- 1...Bf6
- 2.Ke3#
- 1...Bg7
- 2.Ke3#
- 1...Bh8
- 2.Ke3#
- 1...Sa2
- 2.Kd3#
- 1...Se2
- 2.Kd3#
- 1...Sb3
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Sg4
- 2.Kf5#
- 1...Sf5
- 2.Kxf5#
- 1...Sf7
- 2.Kf5#
- 1...Sg8
- 2.Kf5#
- 1...g4!
- 1...Bxf2
- 1.Qb5+?
- 1...Kd6
- 2.Qd7#
- 1...Kc7!
- 1...Kd6
- 1.Qb7+?
- 1...Kd6
- 2.Qd7#
- 1...Kxb7!
- 1...Kd6
- 1.Qc8+?
- 1...Kd6
- 2.Qd7#
- 1...Kb6!
- 1...Kd6
- 1.Qd8?
- 1...Bxf2
- 2.Ke5#
- 1...Ba1
- 2.Ke3#
- 1...Bb2
- 2.Ke3#
- 1...Bc3
- 2.Ke3#
- 1...Be3
- 2.Kxe3#
- 2.Ke5#
- 1...Be5
- 2.Ke3#
- 2.Kxe5#
- 1...Bf6
- 2.Ke3#
- 1...Bg7
- 2.Ke3#
- 1...Bh8
- 2.Ke3#
- 1...Sa2
- 2.Kd3#
- 1...Se2
- 2.Kd3#
- 1...Sb3
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Sg4
- 2.Kf5#
- 1...Sf5
- 2.Kxf5#
- 1...Sf7
- 2.Kf5#
- 1...Sg8
- 2.Kf5#
- 1...g4
- 2.Kf4#
- 1...Kb7!
- 1...Bxf2
- 1.f4?
- 1...gxf4
- 2.Kxf4#
- 1...Ba1
- 2.Ke3#
- 1...Bg1
- 2.Ke5#
- 1...Bb2
- 2.Ke3#
- 1...Bf2
- 2.Ke5#
- 1...Bc3
- 2.Ke3#
- 1...Be3
- 2.Kxe3#
- 2.Ke5#
- 1...Be5
- 2.Ke3#
- 2.Kxe5#
- 1...Bf6
- 2.Ke3#
- 1...Bg7
- 2.Ke3#
- 1...Bh8
- 2.Ke3#
- 1...Sa2
- 2.Kd3#
- 1...Se2
- 2.Kd3#
- 1...Sb3
- 2.Kd3#
- 1...Sd3
- 2.Kxd3#
- 1...Sg4
- 2.Kf5#
- 1...Sf5
- 2.Kxf5#
- 1...Sf7
- 2.Kf5#
- 1...Sg8
- 2.Kf5#
- 1...g4!
- 1...gxf4
- 1.Bf3?
- Keys
- 1.Kf3!
- 1...g4+
- 2.Kf4#
- 1...Bxf2
- 2.Kxf2#
- 1...Ba1
- 2.Ke3#
- 1...Bb2
- 2.Ke3#
- 1...Bc3
- 2.Ke3#
- 1...Be3
- 2.Kxe3#
- 1...Be5
- 2.Ke3#
- 1...Bf6
- 2.Ke3#
- 1...Bg7
- 2.Ke3#
- 1...Bh8
- 2.Ke3#
- 1...Sa2
- 2.Ke2#
- 1...Se2
- 2.Kxe2#
- 1...Sb3
- 2.Ke2#
- 1...Sd3
- 2.Ke2#
- 1...Sg4
- 2.Kxg4#
- 1...Sf5
- 2.Kg4#
- 1...Sf7
- 2.Kg4#
- 1...Sg8
- 2.Kg4#
- 1...g4+
- 1.Kf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(c);::B(A)+K(E)
- B(c);XP(B)::B(A)+K(E)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- S(h);::B(A)+K(E)
- S(h);::B(A)+K(E),XS(h)
- P(f);::B(A)+K(E)
- Tries
- Try
- B(A);
- Vars
- B(c);XP(B)::B(A)+K(E)
- B(c);::B(A)+K(E)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- S(h);::B(A)+K(E)
- S(h);::B(A)+K(E),XS(h)
- Refutation
- P(f);
- Try
- Q(F);CHECK
- Vars
- K(g);OGATE,P-FLIGHT::QAR1(F)
- Refutation
- K(g);P-FLIGHT
- Try
- Q(F);CHECK
- Vars
- K(g);P-FLIGHT::QAR1(F)
- Refutation
- K(g);S_FLIGHT,XQ(F)
- Try
- Q(F);CHECK
- Vars
- K(g);P-FLIGHT::QAR1(F)
- Refutation
- K(g);P-FLIGHT
- Try
- Q(F);
- Vars
- B(c);XP(B)::B(A)+K(E)
- B(c);::B(A)+K(E)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- S(h);::B(A)+K(E)
- S(h);::B(A)+K(E),XS(h)
- P(f);::B(A)+K(E)
- Refutation
- K(g);S_FLIGHT
- Try
- P(B);
- Vars
- P(f);XP(B)::B(A)+K(E),XP(f)
- B(c);::B(A)+K(E)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- S(h);::B(A)+K(E)
- S(h);::B(A)+K(E),XS(h)
- Refutation
- P(f);
- Try
- Actual
- K(E);S_FLIGHT
- Vars
- P(f);CHECK::B(A)+K(E)
- B(c);XP(B)::B(A)+K(E),XB(c)
- B(c);::B(A)+K(E)
- B(c);::B(A)+K(E),XB(c)
- S(a);::B(A)+K(E)
- S(a);::B(A)+K(E),XS(a)
- S(h);::B(A)+K(E),XS(h)
- S(h);::B(A)+K(E)
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