MESON Chess Problem Database
Problem Display
PID: 389 (1N1b4/p7/P7/kp1b4/p2Q4/p2N3p/P4P1B/6K1 w - - 0 1)
Warton, Joseph John
Warton, Thomas Joseph
The Observer, 1940
(First published on Sun Nov 17 1940)
#2
8 + 8
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bh1
- 2.Qxd8#
- 1...Bxa2
- 2.Qxd8#
- 1...Bg2
- 2.Qxd8#
- 1...Bb3
- 2.Qxd8#
- 1...Bf3
- 2.Qxd8#
- 1...Bc4
- 2.Qxd8#
- 1...Be4
- 2.Qxd8#
- 1...Bc6
- 2.Qxd8#
- 1...Be6
- 2.Qxd8#
- 1...Bb7
- 2.Qxd8#
- 1...Bf7
- 2.Qxd8#
- 1...Ba8
- 2.Qxd8#
- 1...Bg8
- 2.Qxd8#
- 1...Bh4
- 2.Bc7#
- 1...Bg5
- 2.Bc7#
- 1...Bb6
- 2.Qb4#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- 1...b4
- 2.Qc5#
- 2.Qxb4#
- 1...Bh1
- Tries
- 1.Kf1?
- 1...Bxa2
- 2.Qxd8#
- 1...b4
- 2.Qc5#
- 2.Qxb4#
- 1...Bh1
- 2.Qxd8#
- 1...Bb3
- 2.Qxd8#
- 1...Bf3
- 2.Qxd8#
- 1...Bc4
- 2.Qxd8#
- 1...Be4
- 2.Qxd8#
- 1...Bc6
- 2.Qxd8#
- 1...Be6
- 2.Qxd8#
- 1...Bb7
- 2.Qxd8#
- 1...Bf7
- 2.Qxd8#
- 1...Ba8
- 2.Qxd8#
- 1...Bg8
- 2.Qxd8#
- 1...Bh4
- 2.Bc7#
- 1...Bg5
- 2.Bc7#
- 1...Bb6
- 2.Qb4#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- 1...Bg2+!
- 1...Bxa2
- 1.Sc6+?
- 1...Kxa6
- 2.Qxa7#
- 1...Bxc6!
- 1...Kxa6
- 1.Bg3?
- 1...Bxa2
- 2.Qxd8#
- 1...b4
- 2.Qc5#
- 2.Qxb4#
- 1...Bh1
- 2.Qxd8#
- 1...Bg2
- 2.Qxd8#
- 1...Bb3
- 2.Qxd8#
- 1...Bf3
- 2.Qxd8#
- 1...Bc4
- 2.Qxd8#
- 1...Be4
- 2.Qxd8#
- 1...Bc6
- 2.Qxd8#
- 1...Be6
- 2.Qxd8#
- 1...Bb7
- 2.Qxd8#
- 1...Bf7
- 2.Qxd8#
- 1...Ba8
- 2.Qxd8#
- 1...Bg8
- 2.Qxd8#
- 1...Bh4
- 2.Bc7#
- 1...Bg5
- 2.Bc7#
- 1...Bb6
- 2.Qb4#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- 1...h2+!
- 1...Bxa2
- 1.Bf4?
- 1...Bxa2
- 2.Qxd8#
- 1...b4
- 2.Qc5#
- 2.Qxb4#
- 1...Bh1
- 2.Qxd8#
- 1...Bg2
- 2.Qxd8#
- 1...Bb3
- 2.Qxd8#
- 1...Bf3
- 2.Qxd8#
- 1...Bc4
- 2.Qxd8#
- 1...Be4
- 2.Qxd8#
- 1...Bc6
- 2.Qxd8#
- 1...Be6
- 2.Qxd8#
- 1...Bb7
- 2.Qxd8#
- 1...Bf7
- 2.Qxd8#
- 1...Ba8
- 2.Qxd8#
- 1...Bg8
- 2.Qxd8#
- 1...Bh4
- 2.Bc7#
- 1...Bg5
- 2.Bc7#
- 1...Bb6
- 2.Qb4#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- 1...h2+!
- 1...Bxa2
- 1.Be5?
- 1...Bxa2
- 2.Qxd8#
- 1...b4
- 2.Qc5#
- 2.Qxb4#
- 1...Bh1
- 2.Qxd8#
- 1...Bg2
- 2.Qxd8#
- 1...Bb3
- 2.Qxd8#
- 1...Bf3
- 2.Qxd8#
- 1...Bc4
- 2.Qxd8#
- 1...Be4
- 2.Qxd8#
- 1...Bc6
- 2.Qxd8#
- 1...Be6
- 2.Qxd8#
- 1...Bb7
- 2.Qxd8#
- 1...Bf7
- 2.Qxd8#
- 1...Ba8
- 2.Qxd8#
- 1...Bg8
- 2.Qxd8#
- 1...Bh4
- 2.Bc7#
- 1...Bg5
- 2.Bc7#
- 1...Bb6
- 2.Qb4#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- 1...h2+!
- 1...Bxa2
- 1.Bd6?
- threat
- 2.Bb4#
- 1...b4
- 2.Qc5#
- 2.Qxb4#
- 1...Be7
- 2.Bc7#
- 1...h2+!
- threat
- 1.Qc3+?
- 1...b4
- 2.Qxb4#
- 2.Qc5#
- 1...Kb6!
- 1...b4
- 1.Qxd5?
- threat
- 2.Qxd8#
- 1...Kb6
- 2.Qxd8#
- 1...Bh4
- 2.Bc7#
- 1...Bg5
- 2.Bc7#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- 1...Bb6!
- threat
- 1.f3?
- 1...Bxa2
- 2.Qxd8#
- 1...Bxf3
- 2.Qxd8#
- 1...b4
- 2.Qc5#
- 2.Qxb4#
- 1...Bb3
- 2.Qxd8#
- 1...Bc4
- 2.Qxd8#
- 1...Be4
- 2.Qxd8#
- 1...Bc6
- 2.Qxd8#
- 1...Be6
- 2.Qxd8#
- 1...Bb7
- 2.Qxd8#
- 1...Bf7
- 2.Qxd8#
- 1...Ba8
- 2.Qxd8#
- 1...Bg8
- 2.Qxd8#
- 1...Bh4
- 2.Bc7#
- 1...Bg5
- 2.Bc7#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- 1...Bb6!
- 1...Bxa2
- 1.Kf1?
- Keys
- 1.Qh4!
- threat
- 2.Qxd8#
- 1...Kb6
- 2.Qxd8#
- 1...Bxh4
- 2.Bc7#
- 1...b4
- 2.Qxb4#
- 1...Bg5
- 2.Bc7#
- 1...Bb6
- 2.Qb4#
- 1...Bf6
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Be7
- 2.Bc7#
- threat
- 1.Qh4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- B(f);OGATE::QAB(F),XB(h)
- B(f);OGATE,XP(B)::QAB(F),XB(h)
- B(h);N_GUARD::B(D)
- B(h);SBLOCK::QAB1(F)
- B(h);N_GUARD::B(D),XB(h)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- B(f);OGATE,XP(B)::QAB(F),XB(h)
- B(f);OGATE::QAB(F),XB(h)
- B(f);OGATE,P_PINS(E)::QAB(F),XB(h)
- B(h);N_GUARD::B(D)
- B(h);SBLOCK::QAB1(F)
- B(h);N_GUARD::B(D),XB(h)
- Refutation
- B(f);CHECK
- Try
- S(H);CHECK
- Vars
- K(d);P-FLIGHT,XP(G)::QAR1(F),XP(g)
- Refutation
- B(f);XS(H)
- Try
- B(D);
- Vars
- B(f);OGATE,XP(B)::QAB(F),XB(h)
- B(f);OGATE::QAB(F),XB(h)
- B(h);N_GUARD::B(D)
- B(h);SBLOCK::QAB1(F)
- B(h);N_GUARD::B(D),XB(h)
- Refutation
- P(b);CHECK
- Try
- B(D);
- Vars
- B(f);OGATE,XP(B)::QAB(F),XB(h)
- B(f);OGATE::QAB(F),XB(h)
- B(h);N_GUARD::B(D)
- B(h);SBLOCK::QAB1(F)
- B(h);N_GUARD::B(D),XB(h)
- Refutation
- P(b);CHECK
- Try
- B(D);
- Vars
- B(f);OGATE,XP(B)::QAB(F),XB(h)
- B(f);OGATE::QAB(F),XB(h)
- B(h);N_GUARD::B(D)
- B(h);SBLOCK::QAB1(F)
- B(h);N_GUARD::B(D),XB(h)
- Refutation
- P(b);CHECK
- Try
- B(D);
- Threat
- B(D)
- Vars
- B(h);N_GUARD::B(D)
- Refutation
- P(b);CHECK
- Try
- Q(F);CHECK
- Refutation
- K(d);S_FLIGHT
- Try
- Q(F);P_PINP(e),XB(f)
- Threat
- QAB(F),XB(h)
- Vars
- K(d);N_SPINP(e),S_FLIGHT::QAB(F),XB(h)
- B(h);N_GUARD,SBLOCK::B(D)
- B(h);N_GUARD::B(D)
- B(h);N_GUARD::B(D),XB(h)
- Refutation
- B(h);P_PINP(C)
- Try
- P(C);
- Vars
- B(f);OGATE,XP(B)::QAB(F),XB(h)
- B(f);OGATE,XP(C)::QAB(F),XB(h)
- B(f);OGATE::QAB(F),XB(h)
- B(h);N_GUARD::B(D)
- B(h);N_GUARD::B(D),XB(h)
- Refutation
- B(h);P_PINQ(F)
- Try
- Actual
- Q(F);
- Threat
- QAB(F),XB(h)
- Vars
- K(d);S_FLIGHT::QAB(F),XB(h)
- B(h);N_GUARD,SBLOCK,XQ(F)::B(D)
- P(e);::QAB1(F),XP(e)
- B(h);N_GUARD::B(D)
- B(h);P_PINP(C),SBLOCK::QAB1(F)
- B(h);N_GUARD::B(D),XB(h)
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