Meson Chess Problem Database

Petite, Efren

Rochade Europa, 1998

10 + 5

15148	Sadier Collection	2021
5454	Near Snap	2022

This anticipates 168407(2003)

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- K(c);OGATEB,P-FLIGHT,XP(F)::QAR(D)
- K(c);OGATEB,P-FLIGHT,XP(I)::QAR1(D)
Tries
- Try
  - K(B);P-FLIGHT,XP(a)
  - Vars
    - K(c);OGATEB,P-FLIGHT,XP(I)::QAR1(D)
    - P(e);SBLOCK,XP(I)::QAB(D)
  - Refutation
    - P(d);CHECK,XP(F)
- Try
  - S(G);
  - Vars
    - K(c);OGATEB,P-FLIGHT,XP(I)::QAR1(D)
  - Refutation
    - P(d);XP(F)
- Try
  - S(G);
  - Vars
    - K(c);OGATEB,P-FLIGHT,XP(F)::QAR(D)
  - Refutation
    - P(e);XP(I)
- Try
  - R(C);
  - Vars
    - K(c);OGATEB,P-FLIGHT,XP(I)::QAR1(D)
    - P(d);SBLOCK,XP(F)::R(C)+S(G)
    - P(e);SBLOCK,XP(I)::R(C)+S(G)
  - Refutation
    - K(c);P-FLIGHT,XP(F)
- Try
  - Q(D);CHECK
  - Refutation
    - K(c);S_FLIGHT,XQ(D)
- Try
  - Q(D);CHECK
  - Vars
    - K(c);OGATE,P-FLIGHT,XP(F)::QAR1(D),XP(b)
  - Refutation
    - K(c);P-FLIGHT,XP(I)
- Try
  - P(I);XP(e)
  - Threat
    - QAR2(D)
  - Vars
    - K(c);P-FLIGHT::QAR1(D)
  - Refutation
    - P(d);XP(F)
- Try
  - P(I);
  - Threat
    - P=Q
  - Vars
    - K(c);P-FLIGHT::P=Q
  - Refutation
    - P(d);XP(F)
Actual
- Q(D);
- Vars
  - K(c);P-FLIGHT,XP(F)::QAR1(D)
  - K(c);OGATEB,P-FLIGHT,XP(I)::QAR1(D)
  - P(d);SBLOCK,XP(F)::QAR(D)+S(G)
  - P(e);SBLOCK,XP(I)::QAR(D)+S(G)

MESON Chess Problem Database