MESON Chess Problem Database

Problem Display
PID: 142078 (5N2/3p4/3B4/8/B1p1k3/2p5/2N5/3Q3K w - - 0 1)

Larose, Franck

Phenix, 1989

5N2/3p4/3B4/8/B1p1k3/2p5/2N5/3Q3K

#2

6 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qe2+?
      • 1...Kd5
        • 2.Qe5#
      • 1...Kf5!
    • 1.Qg4+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kd3!
    • 1.Qd2?
      • 1...Kf3
        • 2.Qg2#
      • 1...Kf5
        • 2.Qf4#
      • 1...cxd2!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kf3!
  • Keys
    • 1.Qg1!
      • 1...Kd3
        • 2.Qe3#
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qg6#

Anticipated by 24210(1927), 231090(1927), 33184(1938), 16378(1940), 30942(1943), 47022(1955), 73436(1961), 12363(1978), 46971(1989)

This anticipates 84992(1992), 120638(1995), 79159(2005)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::QAR1(A)
      • K(c);S_FLIGHT::QAB1(A)
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