MESON Chess Problem Database

Problem Display
PID: 15501 (1B6/7K/8/3N4/4k3/Q7/5n2/5B2 w - - 0 1)

Saunders, Denis M

The Problemist, 1984

1B6/7K/8/3N4/4k3/Q7/5n2/5B2

#2

5 + 2

3936 The Wizard of Oz 1999
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd3#
    • 1...Sh1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qd3#
    • 1...Sg4
      • 2.Qd3#
  • Tries
    • 1.Se7?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sh1
        • 2.Qd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sg4
        • 2.Qd3#
      • 1...Kd4!
    • 1.Bg2+?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5!
    • 1.Qb4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kf5!
    • 1.Qb3?
      • 1...Kd4
        • 2.Qc4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sh1
        • 2.Qd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sg4
        • 2.Qd3#
      • 1...Kf5!
    • 1.Qc3?
      • 1...Kxd5
        • 2.Qc4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sh1
        • 2.Qd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sg4
        • 2.Qd3#
      • 1...Kf5!
    • 1.Qa4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kf5!
  • Keys
    • 1.Qa6!
      • 1...Kf3
        • 2.Qe2#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Qg6#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sh1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sg4
        • 2.Qd3#

Anticipated by 107962(1904)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • S(C);
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
        • K(b);S_FLIGHT,XS(C)::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT,XS(C)::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
        • K(b);S_FLIGHT,XS(C)::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);S_FLIGHT,XS(C)::QAB1(B)
      • S(a);N_GUARD::QAB1(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
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