Meson Chess Problem Database

Ansell, George Kirkpatrick

Bolton Football Field, 1893

(First published on Sat Feb 4 1893)

11 + 9

15239	Valois Notebooks	2025

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
Sets
- B(a);XP(C)::QAB(A)+K(B),XB(a)
- B(a);OGATE::QAB(A)
- S(d);::QAB(A)+K(B),XS(d)
- S(d);XP(G)::S(J),XS(d)
- P(e);CHECK,XP(D)::QAB(A)+K(B),XP(e)
- P(h);SBLOCK,XP(H)::R(I)
Tries
- Try
  - S(E);CHECK
  - Vars
    - K(f);P-FLIGHT,S_CUTB(a)::B(K)
  - Refutation
    - B(a);XS(E)
- Try
  - B(K);
  - Threat
    - S(E),XP(g)
  - Vars
    - P(e);CHECK,XP(D)::QAB(A)+K(B),XP(e)
    - B(a);XP(C)::QAB(A)+K(B),XB(a)
    - B(a);OGATE::QAB(A)
  - Refutation
    - P(i);XR(I)
- Try
  - P(C);CHECK
  - Vars
    - K(f);N_GUARD,P-FLIGHT::R(I)
  - Refutation
    - P(e);CHECK,XP(C)
- Try
  - P(D);XS(d)
  - Threat
    - DUALS(2)
  - Vars
    - B(a);XP(C)::QAB(A)+K(B),XB(a)
    - P(i);::QAB(A)+K(B)
    - P(e);::QAB(A)+K(B),XP(e)
  - Refutation
    - P(i);XR(I)
- Try
  - P(D);XP(e)
  - Threat
    - DUALS(2)
  - Vars
    - S(d);XP(G)::S(J),XS(d)
    - P(i);XR(I)::QAB(A)+K(B)
  - Refutation
    - P(i);
- Try
  - P(H);XP(h)
  - Threat
    - R1(I)
  - Vars
    - P(e);CHECK,XP(D)::QAB(A)+K(B),XP(e)
    - B(a);XP(C)::QAB(A)+K(B),XB(a)
    - B(a);OGATE::QAB(A)
    - P(i);N_GUARD,SBLOCK::S(J)
  - Refutation
    - P(i);XR(I)
Actual
- B(K);
- Vars
  - P(e);CHECK,XP(D)::QAB(A)+K(B),XP(e)
  - B(a);XP(C)::QAB(A)+K(B),XB(a)
  - S(d);XB(K)::QAB(A)+K(B),XS(d)
  - S(d);XP(G)::S(J),XS(d)
  - P(h);SBLOCK,XP(H)::R(I)
  - P(i);N_GUARD,XR(I)::S(J)
  - B(a);OGATE::QAB(A)
  - S(d);::QAB(A)+K(B),XP(b)
  - P(i);N_GUARD::S(J)

MESON Chess Problem Database