Meson Chess Problem Database

Jonsson, Gustav

Die Schwalbe, 1960

8 + 9

6490	yacpdb	2009

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
Sets
- S(d);N_GUARD::B(A),XS(d)
- S(d);N_GUARD::B(A)
- S(g);OGATE::QAB(D)
- S(g);N_SPINP(b),OGATE::QAB(D)
Tries
- Try
  - B(A);CHECK
  - Vars
    - S(d);P_SPINS(d)::S(G)
  - Refutation
    - S(d);XB(A)
- Try
  - B(A);CHECK,XP(b)
  - Vars
    - K(e);S_FLIGHT::B(A)
    - S(g);OGATE,P_SPINS(g),XB(A)::QAB(D)
    - S(g);OGATE,P_SPINS(g)::QAB(D)
  - Refutation
    - P(f);P_SPINP(f)
- Try
  - R(B);N_PINP(b)
  - Threat
    - S(G)
  - Vars
    - S(g);OGATE,SBLOCK,XR(B)::QAB(D)
  - Refutation
    - K(e);P_SPINP(b),S_FLIGHT,XR(B)
- Try
  - R(B);CHECK,XP(f)
  - Vars
    - K(e);N_SPINP(b),OGATE,S_FLIGHT::R1(B)
  - Refutation
    - K(e);N_SPINP(b),P-FLIGHT,XR(B)
- Try
  - R(E);
  - Threat
    - DUALS(2)
  - Vars
    - R(a);XR(B)::S(G)
    - S(g);N_SPINP(b),OGATE::QAB(D)
    - S(g);::S(G)
  - Refutation
    - P(c);XR(E)
- Try
  - R(E);CHECK,XS(d)
  - Refutation
    - K(e);N_SPINP(b),S_FLIGHT
- Try
  - Q(D);N_PINP(b)
  - Threat
    - DUALS(2)
  - Vars
    - P(c);XR(E)::S(G)
    - P(c);::S(G)
  - Refutation
    - P(f);
Actual
- B(A);
- Threat
  - S(G)
- Vars
  - K(e);S_FLIGHT::R(B)+B(A),DCHECK,XP(b)
  - S(g);N_SPINP(b),OGATE,SBLOCK::QAB(D)
  - P(f);N_SPINP(b),OGATEB,SBLOCK::QAR(D),XS(g)

MESON Chess Problem Database