MESON Chess Problem Database
Problem Display
PID: 503 (n7/KQ1N4/3p4/3pp1b1/3kr1R1/3P4/nP3Pb1/2N3B1 w - - 0 1)
Morse, Christopher Jeremy
The Observer, 1957
(First published on Sun Nov 17 1957)
#2
9 + 9
| 17397 | Ling Notebooks | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Rf4
- 2.f3#
- 1...Rxg4
- 2.f4#
- 1...Be3
- 2.fxe3#
- 1...Bf6
- 2.f3#
- 1...Be7
- 2.f3#
- 1...Bd8
- 2.f3#
- 1...Sc3
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 1...Sb6
- 2.Qxb6#
- 1...Sc7
- 2.Qb6#
- 1...Rf4
- Tries
- 1.Rxe4+?
- 1...Bxe4
- 2.f4#
- 1...dxe4!
- 1...Bxe4
- 1.Rxe4+?
- Keys
- 1.Sf6!
- threat
- 2.Qxd5#
- 1...Kc5
- 2.Sb3#
- 1...Rxg4
- 2.f4#
- 1...Bxf6
- 2.f3#
- 1...Rf4
- 2.f3#
- 1...Sc3
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 1...Sb6
- 2.Qxb6#
- 1...Sc7
- 2.Qb6#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(d);S_CUTB(g)::B(B)+P(D)
- R(d);N_GUARD,N_SPINR(d),XR(F)::B(B)+P(D)
- B(g);OGATE::P(D),XB(g)
- B(g);N_GUARD::B(B)+P(D)
- S(a);N_GUARD::QAR2(H)
- S(a);N_GUARD::QAR2(H),XS(a)
- S(i);N_GUARD::QAB(H),XS(i)
- S(i);N_GUARD::QAB(H)
- Tries
- Try
- R(F);CHECK,XR(d)
- Vars
- B(b);XR(F)::B(B)+P(D)
- Refutation
- P(e);XR(F)
- Try
- Actual
- S(I);
- Threat
- QAR1(H),XP(e)
- Vars
- K(c);N_SPINR(d),S_FLIGHT::S(A)
- R(d);N_GUARD,N_SPINR(d),XR(F)::B(B)+P(D)
- B(g);N_GUARD,XS(I)::B(B)+P(D)
- R(d);S_CUTB(g)::B(B)+P(D)
- S(a);N_GUARD::QAR2(H)
- S(a);N_GUARD::QAR2(H),XS(a)
- S(i);N_GUARD::QAB(H),XS(i)
- S(i);N_GUARD::QAB(H)
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