Meson Chess Problem Database

Andersson, Sven Tore

To Mat, 1961

9 + 10

15601	Albrecht-Leiss-Degener Collection	2024

Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 8
Sets
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- S(b);N_GUARD::QAR2(E)
- S(b);N_GUARD::QAR2(E),XS(b)
- P(g);CHECK,SBLOCK::R(G)+P(F)
Tries
- Try
  - K(B);P-FLIGHT,XS(a)
  - Threat
    - S(C)
  - Vars
    - S(b);N_GUARD::QAR2(E)
    - P(g);SBLOCK::R(G)+P(F)
  - Refutation
    - B(i);
- Try
  - S(C);CHECK
  - Vars
    - K(f);P_SPINS(a),S_FLIGHT::QAB1(E)
  - Refutation
    - P(e);XS(C)
- Try
  - B(A);XS(a)
  - Threat
    - S(C)
  - Vars
    - P(g);CHECK::R(G)+P(F)
    - S(b);N_GUARD::QAR2(E)
  - Refutation
    - B(i);
- Try
  - R(I);CHECK
  - Refutation
    - P(h);XR(I)
- Try
  - Q(E);CHECK
  - Vars
    - K(f);P_SPINS(a),S_CUTP(g),S_CUTS(b),S_FLIGHT::QAB1(E)
  - Refutation
    - P(d);XQ(E)
- Try
  - Q(E);CHECK
  - Vars
    - S(b);N_GUARD,P_SPINS(b)::QAR2(E)
  - Refutation
    - P(g);CHECK,P_SPINP(g)
Actual
- Q(E);
- Threat
  - QAB1(E)
- Vars
  - K(f);P_SPINS(a),S_CUTP(g),S_CUTS(b),S_FLIGHT::QAB1(E)
  - S(a);XQ(E)::S(C),XS(a)
  - B(i);N_GUARD::QAB1(E)
  - B(i);N_GUARD::QAB1(E),XB(i)
  - S(a);::QAR(E),XP(e)
  - P(g);N_GUARD,P_PINQ(E),SBLOCK::S(H)

MESON Chess Problem Database