Meson Chess Problem Database

Knott, Hubert Edward

Western Daily Mercury, 1917

(First published on Fri Feb 9 1917)

6 + 10

15239	Valois Notebooks	2019

Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 6
Sets
- R(a);OGATE,XS(C)::B(B),XR(a)
- R(b);N_GUARD::B(B)
- R(b);CHECK,N_GUARD::B(B),XR(b)
- B(d);S_CUTR(b)::B(B)
- B(j);S_CUTR(b)::B(B)
- B(j);N_GUARD::QAR1(A),XB(j)
- S(f);S_CUTR(b)::B(B)
- P(c);S_CUTR(b)::B(B)
- P(g);OGATE,XB(E)::QAR1(A),XP(g)
- P(h);OGATEB::QAB(A)
Tries
- Try
  - S(C);CHECK
  - Vars
    - B(j);XS(C)::B(B)
  - Refutation
    - R(b);XS(C)
- Try
  - S(C);CHECK
  - Vars
    - S(f);XS(C)::QAR1(A)
  - Refutation
    - B(j);XS(C)
- Try
  - Q(A);CHECK
  - Vars
    - R(b);P_SPINR(b)::B(B)
    - B(j);N_GUARD,P_SPINB(j)::QAR1(A),XB(j)
  - Refutation
    - R(a);P_SPINR(a)
- Try
  - Q(A);CHECK
  - Vars
    - P(h);OGATEB,P_SPINP(h)::QAB(A)
  - Refutation
    - B(j);P_SPINB(j)
- Try
  - Q(A);
  - Threat
    - DUALS(2)
  - Vars
    - R(b);CHECK,N_GUARD::B(B),XR(b)
    - P(g);XB(E)::QAR1(A)
    - B(j);::QAB(A),XP(h)
  - Refutation
    - P(h);XQ(A)
Actual
- Q(A);P_PINP(h)
- Threat
  - QAB(A),XP(h)
- Vars
  - R(b);CHECK,N_GUARD::B(B),XR(b)
  - R(a);OGATE,XS(C)::B(B),XR(a)
  - P(g);OGATEB,XB(E)::QAR(A)
  - B(d);S_CUTR(b)::B(B)
  - S(f);S_CUTR(b)::B(B)
  - S(f);S_CUTB(j)::QAR(A)
  - S(f);N_GUARD,S_CUTB(j)::S(C)

MESON Chess Problem Database