MESON Chess Problem Database

Problem Display
PID: 2393 (1b6/8/4KB2/8/6N1/Q3RPk1/6p1/6N1 w - - 0 1)

Healey, Frank

English Mechanic and World of Science, 1875

(First published on Fri Mar 19 1875)

1b6/8/4KB2/8/6N1/Q3RPk1/6p1/6N1

#2

7 + 3

1693 English Chess Problems 1876
3644 200 Chess Problems (Healey) 1908
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Se2#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Ba7
      • 2.Qd6#
  • Tries
    • 1.Kf5?
      • threat
        • 2.f4#
      • 1...Ba7
        • 2.Qd6#
      • 1...Bf4!
    • 1.Bh4+?
      • 1...Kf4
        • 2.Se2#
        • 2.Sh3#
        • 2.Re4#
        • 2.Qb4#
        • 2.Qf8#
        • 2.Qa4#
      • 1...Kxh4!
    • 1.Qc5?
      • 1...Kf4
        • 2.Se2#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Ba7
        • 2.Qd6#
        • 2.Qe5#
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Bf4!
    • 1.Qc3?
      • 1...Kf4
        • 2.Se2#
      • 1...Bf4
        • 2.Qe1#
      • 1...Be5
        • 2.Qxe5#
      • 1...Ba7
        • 2.Qe5#
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Bd6!
    • 1.Qa5?
      • 1...Kf4
        • 2.Se2#
      • 1...Bf4
        • 2.Qe1#
      • 1...Be5
        • 2.Qxe5#
      • 1...Ba7
        • 2.Qc7#
        • 2.Qe5#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Bd6!
    • 1.f4+?
      • 1...Kxf4
        • 2.Qb4#
        • 2.Qa4#
      • 1...Kxg4!
  • Keys
    • 1.Qe7!
      • 1...Kf4
        • 2.Se2#
      • 1...Bf4
        • 2.Bh4#
      • 1...Be5
        • 2.Bxe5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Ba7
        • 2.Be5#
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::S(A)
    • B(c);N_GUARD::QAB(B),XB(c)
    • B(c);N_GUARD::QAB(B)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • R(C)+P(D)
      • Vars
        • B(c);N_GUARD::QAB(B)
      • Refutation
        • B(c);
    • Try
      • B(G);CHECK
      • Refutation
        • K(b);S_FLIGHT,XB(G)
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::S(A)
        • B(c);N_GUARD::QAB(B),XB(c)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::S(A)
        • B(c);SBLOCK::QAB(B)
        • B(c);N_GUARD::QAB(B),XB(c)
      • Refutation
        • B(c);
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::S(A)
        • B(c);SBLOCK::QAB(B)
        • B(c);N_GUARD::QAB(B),XB(c)
      • Refutation
        • B(c);
    • Try
      • P(D);CHECK
      • Refutation
        • K(b);P-FLIGHT,XS(E)
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::S(A)
      • B(c);SBLOCK::B(G)
      • B(c);N_GUARD::B(G),XB(c)
      • B(c);N_GUARD::QAB(B),XB(c)
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