MESON Chess Problem Database

Problem Display
PID: 36255 (2BkNK2/N2p4/3n4/8/8/4p3/4QB2/4b3 w - - 0 1)

Marin y Llovet, Valentin

Good Companions (August), 1921

2BkNK2/N2p4/3n4/8/8/4p3/4QB2/4b3

#2

6 + 5

3132 The Good Companion Two-Mover 1922
23 Die Schwalbe 2001
5459 Sachmatija 2002
145 StrateGems 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Bh4#
    • 1...Bb4
      • 2.Bh4#
    • 1...Ba5
      • 2.Bh4#
    • 1...exf2
      • 2.Qe7#
  • Tries
    • 1.Qa6?
      • threat
        • 2.Qb6#
      • 1...Sxc8
        • 2.Qxc8#
      • 1...Ba5
        • 2.Bh4#
        • 2.Qxa5#
      • 1...Sc4
        • 2.Qf6#
      • 1...Sb5
        • 2.Qf6#
      • 1...Sxe8!
  • Keys
    • 1.Qd2!
      • 1...Bxd2
        • 2.Bh4#
      • 1...Bxf2
        • 2.Qa5#
      • 1...Sxc8
        • 2.Sc6#
      • 1...Sxe8
        • 2.Qxd7#
      • 1...exd2
        • 2.Bb6#
      • 1...exf2
        • 2.Qg5#
      • 1...Sc4
        • 2.Qxd7#
      • 1...Se4
        • 2.Qxd7#
      • 1...Sb5
        • 2.Qxd7#
      • 1...Sf5
        • 2.Qxd7#
      • 1...Sb7
        • 2.Qxd7#
      • 1...Sf7
        • 2.Qxd7#
      • 1...e2
        • 2.Bb6#
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::B(B)
    • P(b);OGATE,XB(B)::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(c);OGATE,XB(D)::QAR1(A),XS(c)
        • S(c);OGATE::QAB(A)
      • Refutation
        • S(c);XS(E)
  • Actual
    • Q(A);
    • Vars
      • B(a);N_GUARD,XQ(A)::B(B)
      • B(a);N_GUARD,XB(B)::QAB(A)
      • S(c);P_SPINP(d),SBLOCK,XB(D)::S(C)
      • S(c);OGATE,P_SPINP(d),XS(E)::QAR1(A),XP(d)
      • P(b);OGATE,XQ(A)::B(B)
      • P(b);OGATE,XB(B)::QAB(A)
      • S(c);OGATE,P_SPINP(d)::QAR1(A),XP(d)
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