MESON Chess Problem Database
Problem Display
PID: 184930 (8/8/4K3/2Q5/p3B3/1kr4R/pb6/n7 w - - 0 1)
MacKay, Donald
The Observer, 1929
(First published on Sun May 12 1929)
#2
4 + 6
| 5454 | Near Snap | 2018 |
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rd3
- 2.Bd5#
- 1...Rf3
- 2.Bd5#
- 1...Rg3
- 2.Bd5#
- 1...Rxh3
- 2.Bd5#
- 1...Bc1
- 2.Qxc3#
- 1...Ba3
- 2.Qxc3#
- 1...Sc2
- 2.Bd5#
- 1...a3
- 2.Qb5#
- 1...Rd3
- Tries
- 1.Kf5?
- 1...Rxh3
- 2.Bd5#
- 1...Bc1
- 2.Qxc3#
- 1...Ba3
- 2.Qxc3#
- 1...a3
- 2.Qb5#
- 1...Rd3
- 2.Bd5#
- 1...Re3
- 2.Bd5#
- 1...Rg3
- 2.Bd5#
- 1...Sc2
- 2.Bd5#
- 1...Rf3+!
- 1...Rxh3
- 1.Kd6?
- 1...Rd3+
- 2.Bd5#
- 1...Rxh3
- 2.Bd5#
- 1...Bc1
- 2.Qxc3#
- 1...a3
- 2.Qb5#
- 1...Re3
- 2.Bd5#
- 1...Rf3
- 2.Bd5#
- 1...Rg3
- 2.Bd5#
- 1...Sc2
- 2.Bd5#
- 1...Ba3!
- 1...Rd3+
- 1.Kf7?
- 1...Rxh3
- 2.Bd5#
- 1...Bc1
- 2.Qxc3#
- 1...Ba3
- 2.Qxc3#
- 1...a3
- 2.Qb5#
- 1...Rd3
- 2.Bd5#
- 1...Re3
- 2.Bd5#
- 1...Rg3
- 2.Bd5#
- 1...Sc2
- 2.Bd5#
- 1...Rf3+!
- 1...Rxh3
- 1.Re3?
- 1...Bc1
- 2.Qxc3#
- 1...Ba3
- 2.Qxc3#
- 1...a3
- 2.Qb5#
- 1...Rd3
- 2.Bd5#
- 1...Sc2
- 2.Bd5#
- 1...Rxe3!
- 1...Bc1
- 1.Rf3?
- 1...Rxf3
- 2.Bd5#
- 1...Bc1
- 2.Qxc3#
- 1...Ba3
- 2.Qxc3#
- 1...a3
- 2.Qb5#
- 1...Rd3
- 2.Bd5#
- 1...Sc2
- 2.Bd5#
- 1...Re3!
- 1...Rxf3
- 1.Rg3?
- 1...Rxg3
- 2.Bd5#
- 1...Bc1
- 2.Qxc3#
- 1...Ba3
- 2.Qxc3#
- 1...a3
- 2.Qb5#
- 1...Rd3
- 2.Bd5#
- 1...Rf3
- 2.Bd5#
- 1...Sc2
- 2.Bd5#
- 1...Re3!
- 1...Rxg3
- 1.Qb6+?
- 1...Kc4
- 2.Bd5#
- 1...Ka3!
- 1...Kc4
- 1.Kf5?
- Keys
- 1.Kd7!
- 1...Rd3+
- 2.Bd5#
- 1...Rxh3
- 2.Bd5#
- 1...Bc1
- 2.Qxc3#
- 1...Ba3
- 2.Qxc3#
- 1...a3
- 2.Qb5#
- 1...Re3
- 2.Bd5#
- 1...Rf3
- 2.Bd5#
- 1...Rg3
- 2.Bd5#
- 1...Sc2
- 2.Bd5#
- 1...Rd3+
- 1.Kd7!
This anticipates 16741(1942)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(e);::B(B)
- R(e);N_SPINR(e),XR(A)::B(B)
- B(c);N_GUARD::QAR1(C),XR(e)
- B(c);N_GUARD,SBLOCK::QAR1(C),XR(e)
- S(a);SBLOCK::B(B)
- P(f);SBLOCK::QAR2(C)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- R(e);N_SPINR(e),XR(A)::B(B)
- B(c);N_GUARD::QAR1(C),XR(e)
- B(c);N_GUARD,SBLOCK::QAR1(C),XR(e)
- P(f);SBLOCK::QAR2(C)
- R(e);::B(B)
- S(a);SBLOCK::B(B)
- Refutation
- R(e);CHECK
- Try
- K(D);P-FLIGHT
- Vars
- R(e);CHECK::B(B)
- R(e);N_SPINR(e),XR(A)::B(B)
- B(c);N_GUARD::QAR1(C),XR(e)
- P(f);SBLOCK::QAR2(C)
- R(e);::B(B)
- S(a);SBLOCK::B(B)
- Refutation
- B(c);P_PINQ(C)
- Try
- K(D);S_FLIGHT
- Vars
- R(e);N_SPINR(e),XR(A)::B(B)
- B(c);N_GUARD::QAR1(C),XR(e)
- B(c);N_GUARD,SBLOCK::QAR1(C),XR(e)
- P(f);SBLOCK::QAR2(C)
- R(e);::B(B)
- S(a);SBLOCK::B(B)
- Refutation
- R(e);CHECK
- Try
- R(A);
- Vars
- B(c);N_GUARD::QAR1(C),XR(e)
- B(c);N_GUARD,SBLOCK::QAR1(C),XR(e)
- P(f);SBLOCK::QAR2(C)
- R(e);::B(B)
- S(a);SBLOCK::B(B)
- Refutation
- R(e);N_SPINR(e),P_PINB(B),XR(A)
- Try
- R(A);
- Vars
- R(e);N_SPINR(e),XR(A)::B(B)
- B(c);N_GUARD::QAR1(C),XR(e)
- B(c);N_GUARD,SBLOCK::QAR1(C),XR(e)
- P(f);SBLOCK::QAR2(C)
- R(e);::B(B)
- S(a);SBLOCK::B(B)
- Refutation
- R(e);P_PINB(B)
- Try
- R(A);
- Vars
- R(e);N_SPINR(e),XR(A)::B(B)
- B(c);N_GUARD::QAR1(C),XR(e)
- B(c);N_GUARD,SBLOCK::QAR1(C),XR(e)
- P(f);SBLOCK::QAR2(C)
- R(e);::B(B)
- S(a);SBLOCK::B(B)
- Refutation
- R(e);P_PINB(B)
- Try
- Q(C);CHECK
- Vars
- K(d);N_SPINR(e),S_FLIGHT::B(B)
- Refutation
- K(d);P-FLIGHT
- Try
- Actual
- K(D);S_FLIGHT
- Vars
- R(e);CHECK::B(B)
- R(e);N_SPINR(e),XR(A)::B(B)
- B(c);N_GUARD::QAR1(C),XR(e)
- B(c);N_GUARD,SBLOCK::QAR1(C),XR(e)
- P(f);SBLOCK::QAR2(C)
- R(e);::B(B)
- S(a);SBLOCK::B(B)
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