Meson Chess Problem Database

Mansfield, Comins

7th HM., American Chess Problemist, 1951-1952

9 + 5

55	The Observer	1952
3550	Complete Mansfield/II	1997

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 11
Sets
- Q(a);N_GUARD::QAB1(B),XP(d)
- Q(a);N_GUARD,P_PINP(E)::QAB1(B),XP(d)
- R(b);S_CUTQ(a)::QAB1(B),XP(d)
- R(c);N_GUARD::QAR(B)
- R(c);N_GUARD,XR(F)::QAR(B)
Tries
- Try
  - B(H);
  - Threat
    - DUALS(2)
  - Vars
    - Q(a);N_SPINP(d),XQ(B)::S(G)
    - R(b);N_SPINP(d),XQ(B)::S(G)
    - Q(a);N_GUARD,P_PINP(E)::QAB1(B),XP(d)
  - Refutation
    - R(c);XB(H)
- Try
  - B(H);
  - Threat
    - S(G)
  - Vars
    - Q(a);N_GUARD,P_PINP(E)::QAB1(B),XP(d)
  - Refutation
    - R(b);XP(A)
- Try
  - B(H);
  - Threat
    - S(G)
  - Vars
    - R(b);N_GUARD,XP(A)::QAR(B)
  - Refutation
    - Q(a);P_PINP(E)
- Try
  - R(F);XP(d)
  - Threat
    - DUALS(2)
  - Vars
    - Q(a);XQ(B)::R1(F)
    - R(b);XP(A)::QAB(B)+R(F),DCHECK
    - R(b);XQ(B)::R1(F)
    - R(c);XQ(B)::R1(F)
    - Q(a);P_PINP(E)::QAB(B)+R(F),DCHECK
  - Refutation
    - R(c);CHECK
- Try
  - Q(B);CHECK,N_PINP(d)
  - Vars
    - R(c);N_GUARD,P_SPINR(c)::QAR(B),XR(c)
  - Refutation
    - Q(a);P_SPINQ(a)
- Try
  - Q(B);N_PINP(d)
  - Threat
    - DUALS(4)
  - Refutation
    - R(b);CHECK,XQ(B)
Actual
- B(H);
- Threat
  - S(G)
- Vars
  - Q(a);N_GUARD,XB(H)::QAB1(B),XP(d)
  - R(b);N_GUARD,XB(H)::QAR(B)
  - R(b);N_GUARD,XP(A)::QAR(B)
  - R(c);N_GUARD,XB(H)::QAR(B)
  - Q(a);N_GUARD,P_PINP(E)::QAB1(B),XP(d)
  - R(c);N_GUARD::R(F)

MESON Chess Problem Database