Meson Chess Problem Database

Alvey, George Clarence Vincent

2nd Prize, BCPJ (August), 1919

8 + 10

56	The Problemist	1929
56	The Problemist	2003
5293	A selection of chess problems by G. C. Alvey	2004
15148	Sadier Collection	2015

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 12
Sets
- Q(b);N_GUARD,P_PINB(B)::S(H),XP(g)
- Q(b);N_GUARD::S(H),XP(g)
- Q(b);N_GUARD,N_SPINR(e)::S(H),XP(g)
- R(e);OGATE::R(D),XR(e)
- R(e);S_CUTQ(b)::S(H),XP(g)
- P(c);SBLOCK::B(B)+R(C),DCHECK
- P(h);XP(F)::S(H),XP(h)
Tries
- Try
  - R(D);CHECK,XR(e)
  - Vars
    - Q(b);P_SPINQ(b)::S(H),XP(g)
    - Q(b);XR(D)::S(H),XP(g)
    - P(g);P_SPINP(g)::R(D),XP(g)
  - Refutation
    - S(a);P_PINQ(G),P_SPINS(a)
- Try
  - Q(G);CHECK,XR(e)
  - Vars
    - Q(b);P_SPINQ(b)::S(H),XP(g)
    - Q(b);P_SPINQ(b),XQ(G)::S(H),XP(g)
    - B(j);P_SPINB(j)::S(H),XP(g)
    - P(g);P_SPINP(g)::QAR2(G),XP(g)
  - Refutation
    - S(a);CHECK,P_SPINS(a)
- Try
  - Q(G);CHECK
  - Vars
    - S(a);CHECK,P_SPINS(a)::B(B)+R(C)
  - Refutation
    - P(i);XQ(G)
Actual
- Q(G);
- Threat
  - QAB(G)+S(H),DCHECK,XP(g)
- Vars
  - S(a);CHECK,N_GUARD::QAB(G)+S(H)
  - S(a);CHECK,N_GUARD,N_SPINR(e),S_CUTQ(b)::QAB(G)+S(H)
  - S(a);CHECK,SBLOCK::B(B)+R(C)
  - P(h);OGATEB,XB(E)::QAR(G)
  - P(c);SBLOCK::B(B)+R(C),DCHECK
  - P(g);N_SPINR(e)::QAB(G)+S(H),DCHECK

MESON Chess Problem Database