Meson Chess Problem Database

Loshinski, Lev Ilich

1st HM., Western Morning News and Mercury, 1930

8 + 9

35	L'Italia Scacchistica	1930
5314	Grossmeister Shakhmatnoi Kompozitsii	1980

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 2
Sets
- R(b);N_SPINR(c)::S(E)
- S(d);SBLOCK::S(E)
- P(i);N_GUARD::QAR2(G)
Tries
- Try
  - B(A);XR(b)
  - Threat
    - DUALS(3)
  - Refutation
    - S(e);XB(A)
- Try
  - B(B);CHECK,XR(c)
  - Refutation
    - K(g);P-FLIGHT,P_SPINR(b),P_SPINS(d)
- Try
  - R(F);CHECK,XR(b)
  - Vars
    - K(g);N_SPINR(c),P-FLIGHT::QAR1(G)
  - Refutation
    - K(g);N_SPINR(c),P-FLIGHT,P_SPINS(d)
- Try
  - R(F);CHECK,N_PINR(c)
  - Vars
    - K(g);P-FLIGHT::QAR1(G)
  - Refutation
    - R(c);XQ(G)
- Try
  - Q(G);CHECK,XR(c)
  - Vars
    - K(g);P-FLIGHT,P_SPINR(b),P_SPINS(d)::QAR1(G)
    - R(b);P_SPINR(b),XQ(G)::S(E)
  - Refutation
    - K(g);S_FLIGHT,XR(F)
- Try
  - Q(G);CHECK
  - Refutation
    - S(e);P_SPINS(e)
- Try
  - Q(G);
  - Threat
    - QAR1(G)
  - Vars
    - K(g);N_SPINR(c),P-FLIGHT,P_SPINR(b),P_SPINS(d)::QAR2(G)
    - R(b);XP(C)::QAB1(G),XP(h)
    - R(b);SBLOCK,XR(F)::S(E)
  - Refutation
    - K(g);N_SPINR(c),S_FLIGHT,XR(F)
Actual
- K(H);P_SPINR(F),S_FLIGHT
- Threat
  - QAR(G)
- Vars
  - R(b);CHECK,OGATE,XR(F)::QAB1(G),XR(b)
  - K(g);N_SPINR(c),P-FLIGHT,P_SPINR(b),P_SPINS(d)::QAR(G)
  - R(b);N_PINR(F),XP(C)::QAB(G)+R(F)
  - S(d);SBLOCK::S(E)
  - S(d);::QAB(G)+R(F),XR(b)
  - S(e);N_PINR(F),SBLOCK::QAB(G)+R(F),DCHECK
  - S(e);::QAB(G)+R(F)

MESON Chess Problem Database