Meson Chess Problem Database

Bottacchi, Antonio

1st Prize, Il Problema, 1932

8 + 5

6479	Problemschach (Sidler)	1968
3098	FIDE Album (1914-1944) (I)	1971
3979	Systematic Terminology	1984
14744	Nuova Antologia dei Problemisti Italiani	1992
102	Probleemblad	2001
5637	Prague Series Solving Ty.	2002-2003
5405	Chess Solving Yearbook 2003	2004
4901	Best Problems	2008
136	Problem Observer	2015

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
Sets
- Q(a);N_GUARD::R1(F),XP(d)
- B(b);N_GUARD::QAB1(B)
- B(b);N_GUARD::QAB1(B),XB(b)
- P(e);OGATEB,XR(F)::B(H)
- P(e);OGATEB::B(H)
Tries
- Try
  - R(E);CHECK
  - Vars
    - P(d);XR(E)::QAR2(B)
  - Refutation
    - Q(a);XR(E)
- Try
  - R(F);CHECK
  - Vars
    - P(e);P_SPINP(e)::B(H)
  - Refutation
    - K(c);P_SPINP(d),S_FLIGHT
- Try
  - Q(B);CHECK
  - Vars
    - Q(a);XQ(B)::R1(F),XP(d)
    - B(b);N_GUARD,P_SPINB(b)::QAB1(B),XB(b)
  - Refutation
    - K(c);P_SPINP(d),S_FLIGHT,XR(E)
- Try
  - Q(B);CHECK
  - Vars
    - K(c);S_FLIGHT::B(H)+R(F)
    - P(d);XQ(B)::R1(F)
  - Refutation
    - Q(a);XQ(B)
Actual
- R(E);
- Threat
  - QAR2(B)
- Vars
  - Q(a);N_GUARD,XS(D)::R(E),XB(b)
  - P(e);OGATEB,XR(F)::B(H)
  - Q(a);N_GUARD::R1(E),XP(d)
  - Q(a);N_GUARD::R1(F),XP(d)
  - B(b);N_GUARD::QAB1(B)

MESON Chess Problem Database