MESON Chess Problem Database
Problem Display
PID: 152991 (8/8/k2P4/8/1PK5/4BB2/n7/n4Q2 w - - 0 1)
Harley, Brian
The Observer, 1935
(First published on Sun Sep 1 1935)
#2
6 + 3
| 15290 | Harley Scrapbook | 2014 |
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- Tries
- 1.Kd4+?
- 1...Kb6
- 2.Ke5#
- 1...Ka7!
- 1...Kb6
- 1.Bg1?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Bf2?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Bd4?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Bc5?
- threat
- 2.Kd4#
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- threat
- 1.Bh1?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Bg2?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Be4?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Bd5?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Bc6?
- threat
- 2.Kd5#
- 1...Sxb4
- 2.Kxb4#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- threat
- 1.Ba8?
- threat
- 2.Kd5#
- 1...Sxb4
- 2.Kxb4#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- threat
- 1.Qe2?
- threat
- 2.Qxa2#
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- threat
- 1.Qg2?
- threat
- 2.Bb7#
- 2.Qxa2#
- 1...Sc1
- 2.Bb7#
- 1...Sc2
- 2.Bb7#
- 1...Sb3
- 2.Bb7#
- 1...Sc3
- 2.Bb7#
- 1...Sxb4!
- threat
- 1.d7?
- 1...Sxb4
- 2.Kxb4#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- 1...Sc1!
- 1...Sxb4
- 1.Kd4+?
- Keys
- 1.Qd3!
- threat
- 2.Qa3#
- 1...Sc2
- 2.Kb3#
- 1...Sb3
- 2.Kxb3#
- 1...Sc3
- 2.Kxc3#
- threat
- 1.Qd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- Tries
- Try
- K(E);CHECK,P-FLIGHT
- Vars
- K(c);P-FLIGHT::B(B)+K(E)
- Refutation
- K(c);P-FLIGHT
- Try
- B(B);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(B);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(B);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(B);
- Threat
- QAB(A)+K(E)
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(C);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(C);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(C);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(C);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(C);
- Threat
- QAB(A)+K(E)
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- B(C);
- Threat
- QAB(A)+K(E)
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- Q(A);
- Threat
- QAR(A),XS(b)
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(b);::B(C)
- S(a);::B(C)
- Refutation
- S(b);XP(D)
- Try
- P(F);
- Vars
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
- Refutation
- S(b);
- Try
- Actual
- Q(A);
- Threat
- QAR(A)
- Vars
- S(a);::QAB(A)+K(E)
- S(a);::QAB(A)+K(E),XS(a)
- S(b);::QAB(A)+K(E),XS(b)
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