MESON Chess Problem Database

Problem Display
PID: 152398 (bNN4K/1k1B4/3B1Rp1/2p2pP1/2p5/8/1q6/1Qb5 w - - 0 1)

Todd, William R

2nd HM., Good Companions (November), 1915

bNN4K/1k1B4/3B1Rp1/2p2pP1/2p5/8/1q6/1Qb5

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qb6
      • 2.Qxb6#
    • 1...Bd2
      • 2.Qh1#
    • 1...Be3
      • 2.Qxb2#
    • 1...Bf4
      • 2.Qxb2#
    • 1...Bxg5
      • 2.Qxb2#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Bxf5?
      • threat
        • 2.Qe4#
      • 1...Qxb1
        • 2.Rf7#
      • 1...Qb5
        • 2.Rf7#
        • 2.Qxb5#
      • 1...Qb6
        • 2.Rf7#
        • 2.Qxb6#
      • 1...gxf5!
  • Keys
    • 1.Be6!
      • 1...Qxb1
        • 2.Rf7#
      • 1...Bxg5
        • 2.Qxb2#
      • 1...Qb3
        • 2.Rf7#
      • 1...Qb4
        • 2.Rf7#
      • 1...Qb5
        • 2.Rf7#
        • 2.Qxb5#
      • 1...Qb6
        • 2.Rf7#
        • 2.Qxb6#
      • 1...Bd2
        • 2.Qh1#
      • 1...Be3
        • 2.Qxb2#
      • 1...Bf4
        • 2.Qxb2#
      • 1...c3
        • 2.Rf7#
      • 1...f4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_PINR(D),OGATE::QAR2(A),XQ(b)
    • Q(b);N_PINR(D),OGATE::QAR1(A),XQ(b)
    • B(a);OGATE::QAB(A)
    • B(a);N_GUARD::QAR(A),XQ(b)
    • B(a);N_GUARD,XP(B)::QAR(A),XQ(b)
    • P(e);N_GUARD::QAB(A)
  • Tries
    • Try
      • B(E);XP(e)
      • Threat
        • QAB(A)
      • Vars
        • Q(b);N_PINR(D),N_SPINQ(b),XQ(A)::R(D)
      • Refutation
        • P(f);XB(E)
  • Actual
    • B(E);
    • Vars
      • Q(b);N_PINR(D),N_SPINQ(b),XQ(A)::R(D)
      • B(a);N_GUARD,XP(B)::QAR(A),XQ(b)
      • Q(b);N_PINR(D)::R(D)
      • B(a);OGATE::QAB(A)
      • B(a);N_GUARD::QAR(A),XQ(b)
      • P(c);N_PINR(D)::R(D)
      • P(e);N_GUARD::QAB(A)
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