MESON Chess Problem Database

Problem Display
PID: 247621 (4Q3/1N1p2RK/3PB3/4k3/4P3/4p3/4P3/8 w - - 0 1)

Colle, B

British Chess Magazine, 1932

4Q3/1N1p2RK/3PB3/4k3/4P3/4p3/4P3/8

#2

8 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bh3+?
      • 1...Kf4
        • 2.Rg4#
      • 1...Kf6
        • 2.Rg6#
        • 2.Qe7#
        • 2.e5#
      • 1...Kd4!
    • 1.Bf5+?
      • 1...Kf4
        • 2.Rg4#
      • 1...Kf6
        • 2.Rg6#
        • 2.Qe7#
      • 1...Kd4!
    • 1.Bxd7+?
      • 1...Kf4
        • 2.Rg4#
      • 1...Kf6
        • 2.Rg6#
        • 2.Qe6#
        • 2.Qe7#
        • 2.e5#
      • 1...Kd4!
    • 1.Rg4?
      • 1...Kd4
        • 2.Qh8#
      • 1...dxe6
        • 2.Qh8#
      • 1...Kf6!
    • 1.Qh5+?
      • 1...Kxe4
        • 2.Rg4#
      • 1...Kf4
        • 2.Rg4#
        • 2.Qf5#
      • 1...Kxe6
        • 2.Qf5#
      • 1...Kf6
        • 2.Rg6#
        • 2.Qf5#
      • 1...Kd4!
  • Keys
    • 1.Qh8!
      • 1...Kd4
        • 2.Rg4#
      • 1...Kxe4
        • 2.Rg4#
      • 1...Kf4
        • 2.Rg4#
      • 1...Kxe6
        • 2.Re7#
      • 1...Kf6
        • 2.Rg6#
      • 1...dxe6
        • 2.Rg4#

This anticipates 188439(1945)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(b);S_FLIGHT::R1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(b);S_FLIGHT::R1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK,XP(c)
      • Vars
        • K(b);S_FLIGHT::R1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(b);S_FLIGHT::QAB(H)
        • P(c);P_SPINP(c),SBLOCK,XB(D)::QAB(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(B)::R(F)
        • K(b);P-FLIGHT,XB(D)::QAB1(H)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(b);S_FLIGHT::QAB(H)+R(F)
      • K(b);P-FLIGHT,XP(B)::R(F)
      • K(b);S_FLIGHT::R1(F)
      • K(b);P-FLIGHT,XB(D)::R1(F)
      • K(b);S_FLIGHT::QAB(H)+R(F),DCHECK
      • P(c);SBLOCK,XB(D)::QAB(H)+R(F)
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