Meson Chess Problem Database

Macleod, Norman Alasdair

Shire, David J

Match: Great Britain - Israel, 1988

8 + 9

6490	yacpdb	2009

Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 2
- REMOVED MATES = 6
Sets
- R(b);N_GUARD::QAR1(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- R(f);SBLOCK::QAR2(A)
- B(a);SBLOCK::QAB(A)
- S(h);N_GUARD::S(H)
- S(h);N_GUARD::S(H),XS(h)
- P(i);SBLOCK::QAR2(A)
Tries
- Try
  - S(D);P_PINS(h)
  - Threat
    - DUALS(2)
  - Vars
    - R(b);XS(D)::S(H)
    - R(f);XS(D)::S(H)
    - R(f);::S(H)
    - P(i);N_SPINS(h)::QAR2(A),XP(d)
  - Refutation
    - P(e);CHECK,XS(D)
- Try
  - S(D);P_PINS(h)
  - Threat
    - S(H)
  - Vars
    - R(b);SBLOCK::QAB(A)
    - B(a);N_GUARD::QAB1(A),XB(a)
    - R(f);N_SPINS(h),SBLOCK::QAR2(A),XP(d)
    - P(i);N_SPINS(h),SBLOCK::QAR2(A),XP(d)
    - P(i);::S(H),XP(i)
  - Refutation
    - R(f);
- Try
  - S(H);
  - Threat
    - QAR2(A)
  - Vars
    - R(b);N_GUARD::QAR1(A)
    - R(f);N_GUARD::QAB1(A)
  - Refutation
    - P(i);XS(D)
- Try
  - B(G);XS(h)
  - Threat
    - S(H)
  - Vars
    - R(b);N_GUARD::QAR1(A),XR(b)
    - B(a);SBLOCK::QAB(A)
    - R(f);SBLOCK::QAR2(A)
    - P(i);::S(H),XP(i)
  - Refutation
    - R(f);CHECK,XB(G)
- Try
  - Q(A);CHECK
  - Vars
    - K(c);S_FLIGHT::S(H)
  - Refutation
    - B(a);XQ(A)
- Try
  - P(B);CHECK
  - Vars
    - P(d);OGATE,XP(B)::QAB1(A),XP(d)
  - Refutation
    - K(c);P-FLIGHT
Actual
- S(D);P_PINS(h)
- Threat
  - S(H)
- Vars
  - B(a);SBLOCK::QAR2(A),XP(d)
  - R(b);SBLOCK::QAR2(A)
  - R(f);N_GUARD,N_SPINS(h)::QAB1(A),XR(f)
  - R(f);N_GUARD::QAB1(A)
  - P(i);N_GUARD,N_SPINS(h),S_CUTR(f)::R(E)
  - P(i);::S(H),XP(i)

MESON Chess Problem Database