Meson Chess Problem Database

van Dijk, Johannes

Acedemie de Viareggio, 1909

8 + 9

6490	yacpdb	2019

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
Sets
- K(b);S_FLIGHT::QAB(D)+R(G)
- P(f);CHECK,SBLOCK::QAB(D)+R(G)
Tries
- Try
  - R(G);CHECK
  - Vars
    - K(b);P-FLIGHT::B(B)+R(G)
    - K(b);P-FLIGHT,XP(H)::B(B)+R(G),DCHECK
  - Refutation
    - K(b);S_FLIGHT
- Try
  - Q(D);
  - Threat
    - DUALS(5)
  - Vars
    - P(f);CHECK,XP(H)::B(A)+R(G)
    - K(b);S_FLIGHT::B(A)+R(G)
    - P(a);::B(A)+R(G),XP(a)
  - Refutation
    - P(f);CHECK
- Try
  - Q(D);CHECK
  - Vars
    - K(b);S_FLIGHT::B(A)+R(G)
  - Refutation
    - P(c);XQ(D)
- Try
  - Q(D);
  - Threat
    - DUALS(6)
  - Vars
    - K(b);S_FLIGHT::B(A)+R(G)
    - S(g);XP(H)::B(A)+R(G),DCHECK
    - P(a);SBLOCK::B(A)+R(G),DCHECK
  - Refutation
    - P(f);XQ(D)
- Try
  - Q(D);CHECK
  - Vars
    - K(b);S_FLIGHT::B(A)+R(G)
    - P(f);CHECK,P_SPINP(f)::B(A)+R(G)
  - Refutation
    - S(h);XQ(D)
Actual
- Q(D);
- Threat
  - B(A)+R(G),XP(f)
- Vars
  - P(f);CHECK,XP(H)::B(A)+R(G)
  - P(f);CHECK,SBLOCK::B(A)+R(G)
  - K(b);S_FLIGHT::B(A)+R(G)
  - S(g);SBLOCK,XP(H)::B(A)+R(G),DCHECK
  - P(a);::QAB1(D),XP(a)

MESON Chess Problem Database