MESON Chess Problem Database

Problem Display
PID: 101551 (1B6/1B5K/4p3/5kPR/5b2/3Ppb2/1Q6/3N4 w - - 0 1)

McGregor, John NO

Good Companions, 1919

1B6/1B5K/4p3/5kPR/5b2/3Ppb2/1Q6/3N4

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Be4#
      • 2.Qf6#
    • 1...Bh2
      • 2.Sxe3#
    • 1...Bg3
      • 2.Sxe3#
    • 1...Bxg5
      • 2.Sxe3#
    • 1...e5
      • 2.Bc8#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qf6#
      • 1...Bxg5
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#
      • 1...e5
        • 2.Bc8#
      • 1...exf2!
    • 1.Bxf3?
      • threat
        • 2.Qf6#
      • 1...Bxg5
        • 2.Sxe3#
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#
      • 1...e5!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qxf4#
      • 1...Kg4
        • 2.Qh3#
      • 1...Bxh2
        • 2.Sxe3#
      • 1...Bxg5
        • 2.Qf4#
      • 1...Bxb8
        • 2.Sxe3#
      • 1...e5
        • 2.Bc8#
      • 1...Bg3
        • 2.Sxe3#
      • 1...Be5
        • 2.Sxe3#
      • 1...Bd6
        • 2.Sxe3#
      • 1...Bc7
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::S(A),XP(a)
    • B(c);N_GUARD,P_SPINB(c),XP(D)::S(A),XP(a)
    • P(e);OGATEB::B(F)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(B)
      • Vars
        • B(c);N_GUARD,P_SPINB(c),XP(D)::QAR1(B)
        • B(c);N_GUARD::QAR1(B),XB(c)
        • P(e);OGATEB::B(F)
      • Refutation
        • P(a);XS(A)
    • Try
      • B(F);XB(b)
      • Threat
        • QAR1(B)
      • Vars
        • B(c);N_GUARD::QAR1(B),XB(c)
      • Refutation
        • P(e);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XB(c)
    • Vars
      • K(d);S_FLIGHT::QAB1(B)
      • B(c);N_GUARD,XQ(B)::S(A),XP(a)
      • B(c);P_SPINB(c),XP(D)::QAR1(B)
      • B(c);N_GUARD,XB(H)::S(A),XP(a)
      • P(e);OGATEB::B(F)
      • B(c);N_GUARD::S(A),XP(a)
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