MESON Chess Problem Database
Problem Display
PID: 153780 (k1b5/ppP5/1R6/8/p3Q3/K7/8/8 w - - 0 1)
Harley, Brian
The Observer, 1949
(First published on Sun Jan 9 1949)
#2
4 + 5
| 15290 | Harley Scrapbook | 2015 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...axb6
- 2.Qxa4#
- 1...a5
- 2.Ra6#
- 1...a6
- 2.Rxa6#
- 1...Bh3
- Tries
- 1.Kb2?
- 1...axb6
- 2.Qxa4#
- 1...a5
- 2.Ra6#
- 1...a6
- 2.Rxa6#
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...a3+!
- 1...axb6
- 1.Rb5?
- 1...a5
- 2.Rxa5#
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...a6!
- 1...a5
- 1.Qh1?
- 1...a5
- 2.Ra6#
- 1...a6
- 2.Rxa6#
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...axb6!
- 1...a5
- 1.Qg2?
- 1...a5
- 2.Ra6#
- 1...a6
- 2.Rxa6#
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...axb6!
- 1...a5
- 1.Qf3?
- 1...a5
- 2.Ra6#
- 1...a6
- 2.Rxa6#
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...axb6!
- 1...a5
- 1.Qd5?
- 1...a5
- 2.Ra6#
- 2.Qxa5#
- 1...a6
- 2.Rxa6#
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...axb6!
- 1...a5
- 1.Kb2?
- Keys
- 1.Qc6!
- 1...axb6
- 2.Qxa4#
- 1...bxc6
- 2.Rb8#
- 1...a5
- 2.Ra6#
- 1...a6
- 2.Rxa6#
- 1...Bh3
- 2.Qxb7#
- 1...Bg4
- 2.Qxb7#
- 1...Bf5
- 2.Qxb7#
- 1...Be6
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...axb6
- 1.Qc6!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(e);N_GUARD::QAB1(B),XP(c)
- P(b);OGATEB,XR(C)::QAR(B),XP(a)
- P(b);OGATEB::R(C)
- P(b);OGATEB::R(C),XP(b)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- P(b);OGATEB,XR(C)::QAR(B),XP(a)
- P(b);OGATEB::R(C)
- P(b);OGATEB::R(C),XP(b)
- B(e);N_GUARD::QAB1(B),XP(c)
- Refutation
- P(a);CHECK
- Try
- R(C);
- Vars
- P(b);OGATEB::R(C),XP(b)
- B(e);N_GUARD::QAB1(B),XP(c)
- Refutation
- P(b);
- Try
- Q(B);
- Vars
- P(b);OGATEB::R(C)
- P(b);OGATEB::R(C),XP(b)
- B(e);N_GUARD::QAB1(B),XP(c)
- Refutation
- P(b);XR(C)
- Try
- Q(B);
- Vars
- P(b);OGATEB::R(C)
- P(b);OGATEB::R(C),XP(b)
- B(e);N_GUARD::QAB1(B),XP(c)
- Refutation
- P(b);XR(C)
- Try
- Q(B);
- Vars
- P(b);OGATEB::R(C)
- P(b);OGATEB::R(C),XP(b)
- B(e);N_GUARD::QAB1(B),XP(c)
- Refutation
- P(b);XR(C)
- Try
- Q(B);
- Vars
- P(b);OGATEB::R(C),XP(b)
- B(e);N_GUARD::QAB1(B),XP(c)
- Refutation
- P(b);XR(C)
- Try
- Actual
- Q(B);
- Vars
- P(b);OGATEB,XR(C)::QAR(B),XP(a)
- P(c);N_SPINP(c),OGATE,XQ(B)::R1(C)
- P(b);OGATEB::R(C)
- P(b);OGATEB::R(C),XP(b)
- B(e);N_GUARD::QAB1(B),XP(c)
Developed and maintained by Brian Stephenson.
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