MESON Chess Problem Database
Problem Display
PID: 201059 (3Q2K1/1Npp4/r4P2/b7/PPk5/3R4/2NPP3/8 w - - 0 1)
Young, Brian WM
The Observer, 1949
(First published on Sun Sep 11 1949)
#2
10 + 5
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rb6
- 2.Sxa5#
- 1...Rc6
- 2.Sxa5#
- 1...Rd6
- 2.Sxa5#
- 1...Re6
- 2.Sxa5#
- 1...Rxf6
- 2.Sxa5#
- 1...Bxb4
- 2.Se3#
- 1...c6
- 2.Sd6#
- 1...d5
- 2.Rc3#
- 2.Qxd5#
- 1...Rb6
- Tries
- 1.Qxc7+?
- 1...Rc6
- 2.Sxa5#
- 2.Sd6#
- 2.Qf4#
- 1...Bxc7!
- 1...Rc6
- 1.Qe7?
- threat
- 2.Sa3#
- 2.Se3#
- 2.Qc5#
- 2.Qe4#
- 1...Bxb4
- 2.Se3#
- 2.Qxb4#
- 2.Qe4#
- 1...Rc6
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Qe4#
- 1...Rd6
- 2.Sxa5#
- 1...Re6
- 2.Sa3#
- 2.Sxa5#
- 2.Qc5#
- 1...Bb6
- 2.Sa3#
- 1...c5
- 2.Qxc5#
- 2.Qe4#
- 1...d5
- 2.Sa3#
- 2.Se3#
- 2.Rc3#
- 2.Qc5#
- 1...d6
- 2.Qe4#
- 1...Ra8+!
- threat
- 1.Qxd7?
- threat
- 2.Rc3#
- 2.Qg4#
- 2.Qb5#
- 2.Qd4#
- 2.Qd5#
- 1...Rxf6
- 2.Sxa5#
- 2.Rc3#
- 2.Qb5#
- 2.Qd4#
- 2.Qd5#
- 1...Bxb4
- 2.Se3#
- 2.Qg4#
- 2.Qb5#
- 2.Qd4#
- 2.Qd5#
- 1...Rb6
- 2.Sxa5#
- 2.Rc3#
- 2.Qg4#
- 2.Qd4#
- 2.Qd5#
- 1...Rc6
- 2.Sxa5#
- 2.Rc3#
- 2.Qg4#
- 2.Qxc6#
- 2.Qd4#
- 2.Qd5#
- 1...Rd6
- 2.Sxa5#
- 2.Qb5#
- 1...Re6
- 2.Sxa5#
- 2.Rc3#
- 2.Qb5#
- 2.Qxe6#
- 2.Qd4#
- 2.Qd5#
- 1...Bb6
- 2.Rc3#
- 2.Qb5#
- 2.Qe6#
- 2.Qd5#
- 2.Qf7#
- 1...c5
- 2.Rc3#
- 2.Qg4#
- 2.Qb5#
- 2.Qd5#
- 1...c6
- 2.Sd6#
- 2.Rc3#
- 2.Qg4#
- 2.Qe6#
- 2.Qd4#
- 2.Qf7#
- 1...Ra8+!
- threat
- 1.Qf8?
- threat
- 2.Sa3#
- 2.Se3#
- 2.Qc5#
- 1...Bxb4
- 2.Se3#
- 2.Qxb4#
- 1...Rc6
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 1...Rd6
- 2.Sxa5#
- 1...Re6
- 2.Sa3#
- 2.Sxa5#
- 2.Qc5#
- 1...Ra8
- 2.Sa3#
- 2.Se3#
- 1...Bb6
- 2.Sa3#
- 1...c5
- 2.Qxc5#
- 1...d6!
- threat
- 1.Qxc7+?
- Keys
- 1.Qc8!
- 1...Rxf6
- 2.Sxa5#
- 1...Bxb4
- 2.Se3#
- 1...Ra7
- 2.Sd6#
- 1...Rb6
- 2.Sxa5#
- 1...Rc6
- 2.Sxa5#
- 1...Rd6
- 2.Sxa5#
- 2.Sxd6#
- 1...Re6
- 2.Sxa5#
- 1...Ra8
- 2.Sd6#
- 1...Bb6
- 2.Sd6#
- 1...c5
- 2.Qxc5#
- 1...c6
- 2.Sd6#
- 1...d5
- 2.Rc3#
- 1...d6
- 2.Qg4#
- 1...Rxf6
- 1.Qc8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 1
- Sets
- R(c);N_GUARD::S(H),XB(b)
- R(c);N_GUARD,XP(G)::S(H),XB(b)
- B(b);SBLOCK,XP(F)::S(A)
- P(d);N_GUARD,S_CUTR(c)::S(H)
- Tries
- Try
- Q(I);CHECK,XP(d)
- Refutation
- B(b);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- R(c);N_GUARD::S(H),XB(b)
- B(b);::S(A)
- P(e);::QAR2(I)
- Refutation
- R(c);CHECK
- Try
- Q(I);XP(e)
- Threat
- DUALS(5)
- Refutation
- R(c);CHECK
- Try
- Q(I);
- Threat
- DUALS(3)
- Vars
- R(c);N_GUARD::S(H),XB(b)
- B(b);::S(A)
- P(d);::QAR1(I),XP(d)
- Refutation
- P(e);
- Try
- Actual
- Q(I);P_PINP(d)
- Vars
- R(c);N_GUARD,XP(G)::S(H),XB(b)
- B(b);SBLOCK,XP(F)::S(A)
- R(c);N_GUARD::S(H)
- R(c);N_GUARD::S(H),XB(b)
- R(c);N_GUARD,N_SPINP(d)::S(H),XB(b)
- R(c);N_GUARD,P_PINQ(I)::S(H)
- B(b);S_CUTR(c)::S(H)
- P(d);OGATE::QAR1(I),XP(d)
- P(d);S_CUTR(c)::S(H)
- P(e);SBLOCK::R1(D)
- P(e);OGATE::QAR(I)
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