MESON Chess Problem Database

Problem Display
PID: 232271 (7N/K3B3/6p1/4kbN1/7p/p3P3/q1B3Q1/8 w - - 0 1)

Bland, WR

English Mechanic and World of Science, 1880

(First published on Fri Jul 9 1880)

7N/K3B3/6p1/4kbN1/7p/p3P3/q1B3Q1/8

#2

7 + 6

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Shf7#
    • 1...Qd5
      • 2.Qh2#
    • 1...Qf7
      • 2.Shxf7#
    • 1...Qa1
      • 2.Shf7#
    • 1...Qb2
      • 2.Shf7#
    • 1...Qxc2
      • 2.Shf7#
    • 1...Bh3
      • 2.Sxg6#
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bg4
      • 2.Sxg6#
      • 2.Qe4#
    • 1...Be6
      • 2.Sxg6#
      • 2.Qe4#
    • 1...Bd7
      • 2.Sxg6#
      • 2.Qe4#
    • 1...Bc8
      • 2.Sxg6#
      • 2.Qe4#
  • Tries
    • 1.Bb3?
      • threat
        • 2.Sgf7#
        • 2.Shf7#
        • 2.Qd5#
      • 1...Qxg2
        • 2.Shf7#
      • 1...Bb1
        • 2.Qd5#
      • 1...Bc2
        • 2.Qd5#
      • 1...Bd3
        • 2.Qd5#
      • 1...Bh3
        • 2.Qe4#
        • 2.Qd5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bg4
        • 2.Qe4#
        • 2.Qd5#
      • 1...Be6
        • 2.Qe4#
      • 1...Bd7
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bc8
        • 2.Qe4#
        • 2.Qd5#
      • 1...Qd2
        • 2.Sgf7#
        • 2.Shf7#
      • 1...Qxb3!
  • Keys
    • 1.Be4!
      • 1...Qxg2
        • 2.Shf7#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Qb1
        • 2.Shf7#
        • 2.Qh2#
      • 1...Qb3
        • 2.Qh2#
      • 1...Qc4
        • 2.Qh2#
      • 1...Qd5
        • 2.Qh2#
      • 1...Qe6
        • 2.Qh2#
      • 1...Qf7
        • 2.Shxf7#
        • 2.Qh2#
      • 1...Qg8
        • 2.Qh2#
      • 1...Qa1
        • 2.Shf7#
        • 2.Qh2#
      • 1...Qb2
        • 2.Shf7#
      • 1...Qc2
        • 2.Shf7#
      • 1...Qd2
        • 2.Shf7#
      • 1...Qe2
        • 2.Shf7#
      • 1...Qf2
        • 2.Shf7#
      • 1...Bh3
        • 2.Sxg6#
      • 1...Bg4
        • 2.Sxg6#
      • 1...Be6
        • 2.Sxg6#
      • 1...Bd7
        • 2.Sxg6#
      • 1...Bc8
        • 2.Sxg6#
      • 1...h3
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::S(G)
    • Q(a);SBLOCK::QAB(B)
    • Q(a);N_GUARD,P_PINB(F)::S(G),XQ(a)
    • Q(a);N_GUARD,XB(A)::S(G)
    • B(e);N_GUARD::QAR1(B),XB(e)
  • Tries
    • Try
      • B(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);XQ(B)::S(G)
        • B(e);::QAR1(B)
        • B(e);N_GUARD::QAR1(B),XB(e)
        • B(e);N_GUARD::QAR1(B)
      • Refutation
        • Q(a);XB(A)
  • Actual
    • B(A);
    • Vars
      • Q(a);N_GUARD,XQ(B)::S(G)
      • B(e);OGATE,XB(A)::QAR1(B),XB(e)
      • Q(a);N_GUARD::QAB(B)
      • Q(a);N_GUARD::S(G)
      • Q(a);N_GUARD,P_PINP(C)::S(G)
      • B(e);N_GUARD::S(G),XP(f)
      • P(c);N_GUARD::QAB(B)
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