Meson Chess Problem Database

Alekseev, Yuri Mikhailovich

Problemist Ukraini, 2011

12 + 11

15148	Sadier Collection	2021

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
Sets
- R(b);N_GUARD::QAB(B),XR(b)
- R(b);N_GUARD::S(A),XR(b)
- R(c);N_GUARD::S(I),XR(c)
- R(c);N_GUARD::QAB(B),XR(c)
- P(f);N_GUARD,XS(I)::B(F)
Tries
- Try
  - R(J);CHECK,XP(f)
  - Vars
    - P(i);P_SPINP(i)::R1(J),XP(i)
  - Refutation
    - P(i);XR(J)
- Try
  - Q(B);
  - Threat
    - QAR1(B)
  - Vars
    - S(j);N_GUARD::QAB1(B),XP(h)
    - R(b);N_GUARD::S(A),XR(b)
    - P(h);::QAR1(B),XP(h)
  - Refutation
    - S(k);
- Try
  - Q(B);
  - Threat
    - QAR1(B)
  - Vars
    - R(c);N_GUARD::S(I),XR(c)
    - S(k);N_GUARD::QAB1(B),XP(i)
    - P(i);::QAR1(B),XP(i)
  - Refutation
    - S(j);
- Try
  - P(C);XR(b)
  - Threat
    - DUALS(2)
  - Vars
    - P(h);::S(A)
  - Refutation
    - R(c);XB(F)
- Try
  - P(C);
  - Threat
    - S(A)
  - Vars
    - R(b);OGATE,XP(C)::QAB(B),XR(b)
  - Refutation
    - R(c);XB(F)
- Try
  - P(D);
  - Threat
    - S(I)
  - Vars
    - R(c);OGATE,XP(D)::QAB(B),XR(c)
    - P(f);N_GUARD,XS(I)::B(F)
  - Refutation
    - R(b);XB(F)
- Try
  - P(E);XR(c)
  - Threat
    - DUALS(3)
  - Vars
    - P(i);::S(I)
  - Refutation
    - R(b);XB(F)
Actual
- Q(B);XP(a)
- Threat
  - QAR(B)+B(F),DCHECK
- Vars
  - R(b);N_GUARD,P_SPINR(b),XB(F)::S(A)
  - R(c);N_GUARD,P_SPINR(c),XB(F)::S(I)

MESON Chess Problem Database