Meson Chess Problem Database

Hartong, Jan

2nd HM., Western Morning News and Mercury, 1921/I

(First published on Sat Feb 26 1921)

11 + 9

15239	Valois Notebooks	2020

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
Sets
- R(c);N_PINS(G)::S(G)
- R(c);S_CUTB(h)::S(A)
- R(i);CHECK,OGATE,XP(I)::R(K)+B(H),XR(i)
- B(a);N_PINS(G)::S(G)
- B(a);CHECK,OGATE,XS(G)::R(K)+B(H),XB(a)
- B(h);N_GUARD::S(A),XB(h)
- B(h);N_GUARD,N_PINP(I)::S(A)
- B(h);N_GUARD::S(A)
Tries
- Try
  - K(J);N_SPINP(I),N_SPINS(G),P-FLIGHT,XB(h)
  - Threat
    - DUALS(3)
  - Vars
    - B(a);XS(A)::S(G)
    - B(a);OGATE,XS(G)::R(K)+B(H),XB(a)
    - R(c);::S(G)
    - B(a);::S(G)
    - S(b);::S(G)
  - Refutation
    - R(c);CHECK
- Try
  - K(J);N_SPINP(I),N_SPINS(G),S_FLIGHT
  - Threat
    - S(G)
  - Vars
    - B(a);OGATE,XS(G)::R(K)+B(H),XB(a)
  - Refutation
    - B(h);
- Try
  - Q(B);
  - Threat
    - DUALS(2)
  - Vars
    - R(i);CHECK,OGATE,XP(I)::R(K)+B(H),XR(i)
    - B(a);CHECK,OGATE,XS(G)::R(K)+B(H),XB(a)
    - R(c);XB(C)::QAB(B)
    - R(c);::QAR1(B),XP(e)
    - B(a);N_PINS(G)::QAR1(B),XP(e)
    - B(h);::QAR1(B),XP(e)
    - B(h);::QAB(B)
  - Refutation
    - S(b);
Actual
- Q(B);
- Threat
  - QAR1(B),XP(e)
- Vars
  - R(i);CHECK,OGATE,XP(I)::R(K)+B(H),XR(i)
  - B(a);CHECK,OGATE,XS(G)::R(K)+B(H),XB(a)
  - R(c);N_GUARD,XB(C)::QAR2(B),XB(a)
  - B(a);N_PINS(G),XQ(B)::S(G)
  - R(c);N_PINS(G)::S(G)
  - R(c);S_CUTB(h)::S(A)
  - B(a);OGATE::QAB1(B)
  - B(h);N_GUARD::S(A),XB(h)
  - B(h);S_CUTR(c)::QAR2(B),XB(a)
  - B(h);N_GUARD,N_PINP(I)::S(A)
  - S(b);S_CUTR(c)::QAR2(B),XB(a)
  - P(e);N_PINS(G)::S(G)

MESON Chess Problem Database