MESON Chess Problem Database

Problem Display
PID: 74086 (4BB2/8/8/N1P5/1k6/nN6/7K/Qb6 w - - 0 1)

Ghirelli, Bruno

4th Comm., Vida Rotaria-Brasil, 1955

4BB2/8/8/N1P5/1k6/nN6/7K/Qb6

#2

7 + 3

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qe1#
    • 1...Bc2
      • 2.Qe1#
    • 1...Bd3
      • 2.Qe1#
    • 1...Be4
      • 2.Qe1#
    • 1...Bf5
      • 2.Qe1#
    • 1...Bg6
      • 2.Qe1#
    • 1...Bh7
      • 2.Qe1#
  • Tries
    • 1.Bg7?
      • threat
        • 2.Bc3#
        • 2.Qc3#
      • 1...Sc2
        • 2.Bc3#
        • 2.Qa4#
      • 1...Sc4
        • 2.Bc3#
        • 2.Qa4#
      • 1...Sb5!
    • 1.c6+?
      • 1...Ka4
        • 2.c7#
      • 1...Kb5!
  • Keys
    • 1.Sd4!
      • 1...Kxa5
        • 2.Qxa3#
      • 1...Sc2
        • 2.c6#
      • 1...Ba2
        • 2.Qe1#
      • 1...Bc2
        • 2.Qe1#
      • 1...Bd3
        • 2.Qe1#
      • 1...Be4
        • 2.Qe1#
      • 1...Bf5
        • 2.Qe1#
      • 1...Bg6
        • 2.Qe1#
      • 1...Bh7
        • 2.Qe1#
      • 1...Sc4
        • 2.Sac6#
      • 1...Sb5
        • 2.Sdc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE::QAB(A)
  • Tries
    • Try
      • B(G);
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);
    • Try
      • P(E);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::B(F)+P(E)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT,XS(D)::QAR2(A),XS(b)
      • S(b);::B(G)+P(E)
      • B(a);OGATE::QAB(A)
      • S(b);SBLOCK::S(D)
      • S(b);SBLOCK::S(C)
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