MESON Chess Problem Database
Problem Display
PID: 185720 (2R1K3/3p1p2/1p2k3/1N5N/3PB3/8/8/8 w - - 0 1)
Gurr, John
The Observer, 1931
(First published on Sun Jun 14 1931)
#2
6 + 4
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...d5
- Tries
- 1.Bb1?
- 1...Kd5
- 2.Sf4#
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 1...f5!
- 1...Kd5
- 1.Bc2?
- 1...Kd5
- 2.Sf4#
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 1...f5!
- 1...Kd5
- 1.Bd3?
- 1...Kd5
- 2.Sf4#
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 1...f5!
- 1...Kd5
- 1.Bf5+?
- 1...Kd5
- 2.Sf4#
- 2.Sf6#
- 1...Kxf5!
- 1...Kd5
- 1.Bg6?
- 1...Kd5
- 2.Sf4#
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f5
- 2.Bf7#
- 1...f6
- 2.Sf4#
- 1...fxg6!
- 1...Kd5
- 1.Rc1?
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...f5!
- 1...d5
- 1.Rc2?
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...f5!
- 1...d5
- 1.Rc3?
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...f5!
- 1...d5
- 1.Rc4?
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...f5!
- 1...d5
- 1.Rc5?
- threat
- 2.Bf5#
- 2.Re5#
- 1...f5
- 2.Bd5#
- 2.Bxf5#
- 2.Re5#
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 2.Bf5#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 2.Bf5#
- 1...bxc5!
- threat
- 1.Rc6+?
- 1...d6
- 2.Sc7#
- 2.Rxd6#
- 1...dxc6!
- 1...d6
- 1.Rc7?
- 1...d5
- 2.Rc6#
- 2.Re7#
- 1...d6
- 2.Re7#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...f5!
- 1...d5
- 1.Rb8?
- 1...d5
- 2.Rxb6#
- 1...d6
- 2.Sc7#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...f5!
- 1...d5
- 1.Rd8?
- 1...d5
- 2.Sc7#
- 2.Rd6#
- 1...d6
- 2.Sc7#
- 2.Rxd6#
- 1...f6
- 2.Sf4#
- 2.Sg7#
- 1...f5!
- 1...d5
- 1.Bb1?
- Keys
- 1.Bh7!
- 1...Kd5
- 2.Sf4#
- 1...d5
- 2.Rc6#
- 1...d6
- 2.Sc7#
- 1...f5
- 2.Bg8#
- 1...f6
- 2.Sf4#
- 1...Kd5
- 1.Bh7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- P(c);N_GUARD::R(E)
- P(c);SBLOCK::S(C)
- Tries
- Try
- B(B);
- Vars
- K(b);S_FLIGHT::S(D)
- P(c);N_GUARD,SBLOCK::R(E)
- P(c);SBLOCK::S(C)
- P(d);SBLOCK::S(D)
- Refutation
- P(d);
- Try
- B(B);
- Vars
- K(b);S_FLIGHT::S(D)
- P(c);N_GUARD,SBLOCK::R(E)
- P(c);SBLOCK::S(C)
- P(d);SBLOCK::S(D)
- Refutation
- P(d);
- Try
- B(B);
- Vars
- K(b);S_FLIGHT::S(D)
- P(c);N_GUARD,SBLOCK::R(E)
- P(c);SBLOCK::S(C)
- P(d);SBLOCK::S(D)
- Refutation
- P(d);
- Try
- B(B);CHECK
- Refutation
- K(b);S_FLIGHT,XB(B)
- Try
- B(B);
- Vars
- K(b);S_FLIGHT::S(D)
- P(c);N_GUARD,SBLOCK::R(E)
- P(c);SBLOCK::S(C)
- P(d);SBLOCK::B(B)
- P(d);SBLOCK::S(D)
- Refutation
- P(d);XB(B)
- Try
- R(E);
- Vars
- P(c);N_GUARD::R(E)
- P(c);SBLOCK::S(C)
- Refutation
- P(d);
- Try
- R(E);
- Vars
- P(c);N_GUARD::R(E)
- P(c);SBLOCK::S(C)
- Refutation
- P(d);
- Try
- R(E);
- Vars
- P(c);N_GUARD::R(E)
- P(c);SBLOCK::S(C)
- Refutation
- P(d);
- Try
- R(E);
- Vars
- P(c);N_GUARD::R(E)
- P(c);SBLOCK::S(C)
- Refutation
- P(d);
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- P(c);N_GUARD::R(E)
- Refutation
- P(a);XR(E)
- Try
- R(E);CHECK
- Refutation
- P(c);XR(E)
- Try
- R(E);
- Vars
- P(c);OGATE::R1(E)
- Refutation
- P(d);
- Try
- R(E);
- Vars
- P(c);N_GUARD::R(E),XP(a)
- P(c);SBLOCK::S(C)
- Refutation
- P(d);
- Try
- R(E);
- Refutation
- P(d);
- Try
- Actual
- B(B);
- Vars
- K(b);S_FLIGHT::S(D)
- P(c);N_GUARD,SBLOCK::R(E)
- P(c);SBLOCK::S(C)
- P(d);OGATEB,SBLOCK::B(B)
- P(d);SBLOCK::S(D)
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