MESON Chess Problem Database
Problem Display
PID: 152994 (1Q1N4/3pp2N/3r4/r2kpB1R/pR1P4/B1P5/8/3K4 w - - 0 1)
Harley, Brian
The Observer, 1935
(First published on Sun Nov 3 1935)
#2
10 + 7
| 15290 | Harley Scrapbook | 2014 |
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Rb5
- 2.Qxb5#
- 1...Raa6
- 2.Qb5#
- 1...Ra7
- 2.Qb5#
- 1...Ra8
- 2.Qb5#
- 1...Rda6
- 2.Qxe5#
- 1...Rb6
- 2.Qxe5#
- 1...Rc6
- 2.Qxe5#
- 1...Rf6
- 2.Qxe5#
- 1...Rg6
- 2.Qxe5#
- 1...Rh6
- 2.Qxe5#
- 1...e4
- 2.Be6#
- 1...e6
- 2.Sf6#
- 1...Rb5
- Tries
- 1.Sg5?
- threat
- 2.Be4#
- 1...e4
- 2.Bxe4#
- 1...exd4!
- threat
- 1.Sf6+?
- 1...Rxf6
- 2.Qxe5#
- 1...exf6!
- 1...Rxf6
- 1.Bh3?
- threat
- 2.Bg2#
- 2.Rxe5#
- 1...Re6
- 2.Bg2#
- 1...Rf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Rg6
- 2.Rxe5#
- 2.Qxe5#
- 1...Ke4!
- threat
- 1.Bg4?
- threat
- 2.Bf3#
- 2.Rxe5#
- 1...Re6
- 2.Bf3#
- 1...Rf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Ke4!
- threat
- 1.Rb5+?
- 1...Rxb5
- 2.Qxb5#
- 1...Kc4!
- 1...Rxb5
- 1.Rh4?
- threat
- 2.Be4#
- 2.c4#
- 1...Rc5
- 2.Be4#
- 1...Rc6
- 2.Be4#
- 2.Qxe5#
- 1...e4
- 2.Bxe4#
- 1...exd4!
- threat
- 1.Qxd6+?
- 1...exd6
- 2.Sf6#
- 1...Kxd6!
- 1...exd6
- 1.Qc7?
- threat
- 2.Qxa5#
- 2.Qc4#
- 1...exd4
- 2.Qxa5#
- 1...Rc5
- 2.Qxc5#
- 1...Rb5
- 2.Rxb5#
- 2.Qc4#
- 1...Raa6
- 2.Rb5#
- 2.Qc4#
- 2.Qc5#
- 1...Ra7
- 2.Rb5#
- 2.Qc4#
- 2.Qc5#
- 1...Ra8
- 2.Rb5#
- 2.Qc4#
- 2.Qc5#
- 1...Rda6
- 2.Qxe5#
- 1...Rb6
- 2.Qxe5#
- 1...Rc6
- 2.Qxe5#
- 1...Rf6
- 2.Qxe5#
- 1...Rg6
- 2.Qxe5#
- 1...Rh6
- 2.Qxe5#
- 1...Re6!
- threat
- 1.Sg5?
- Keys
- 1.dxe5!
- 1...Kc5+
- 2.Rd4#
- 1...Kxe5+
- 2.Bd3#
- 1...Rc5
- 2.Be4#
- 1...Rb5
- 2.Qxb5#
- 1...Raa6
- 2.Qb5#
- 1...Ra7
- 2.Qb5#
- 1...Ra8
- 2.Qb5#
- 1...Rda6
- 2.Rd4#
- 1...Rb6
- 2.Rd4#
- 1...Rc6
- 2.Rd4#
- 1...Re6
- 2.Rd4#
- 1...Rf6
- 2.Rd4#
- 1...Rg6
- 2.Rd4#
- 1...Rh6
- 2.Rd4#
- 1...e6
- 2.Qxd6#
- 1...Kc5+
- 1.dxe5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 7
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- R(b);N_GUARD::QAR2(I),XR(b)
- R(b);N_GUARD::QAR2(I)
- R(e);OGATE::QAR1(I),XP(d)
- P(d);SBLOCK::R(G)+B(F),DCHECK
- P(g);N_GUARD,S_CUTR(e)::S(H)
- Tries
- Try
- S(H);
- Threat
- B(F)
- Vars
- P(d);::B(F),XP(d)
- Refutation
- P(d);XP(E)
- Try
- S(H);CHECK
- Vars
- R(e);OGATE,XS(H)::QAR1(I),XP(d)
- Refutation
- P(g);XS(H)
- Try
- B(F);P_PINP(d)
- Threat
- DUALS(2)
- Vars
- R(e);::B(F)
- Refutation
- K(c);N_SPINP(d),P_PINP(E),S_FLIGHT
- Try
- B(F);P_PINP(d)
- Threat
- DUALS(2)
- Vars
- R(e);::B(F)
- Refutation
- K(c);N_SPINP(d),P_PINP(E),S_FLIGHT
- Try
- R(D);CHECK
- Vars
- R(b);OGATE,XR(D)::QAR2(I),XR(b)
- Refutation
- K(c);P_PINP(E),S_FLIGHT
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- R(b);::B(F)
- P(d);::B(F),XP(d)
- Refutation
- P(d);XP(E)
- Try
- Q(I);CHECK,XR(e)
- Vars
- P(g);SBLOCK,XQ(I)::S(H)
- Refutation
- K(c);P-FLIGHT,XQ(I)
- Try
- Q(I);
- Threat
- DUALS(2)
- Vars
- P(d);XP(E)::QAR(I),XR(b)
- R(b);N_GUARD::QAR1(I),XR(b)
- R(e);OGATE::QAR1(I),XP(d)
- Refutation
- R(e);
- Try
- Actual
- P(E);XP(d)
- Vars
- K(c);CHECK,P-FLIGHT::B(B)+R(D)
- K(c);CHECK,OGATEB,P-FLIGHT,P_SPINR(e),XP(E)::R(G)+B(F)
- R(b);SBLOCK::B(F)
- R(b);N_GUARD::QAR2(I),XR(b)
- R(b);N_GUARD::QAR2(I)
- R(e);::R1(D)
- P(g);N_GUARD::QAR1(I),XR(e)
Developed and maintained by Brian Stephenson.
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