MESON Chess Problem Database

Problem Display
PID: 201747 (2BQ4/3P1k2/8/7K/8/8/8/8 w - - 0 1)

ten Cate, Pieter

Stern, 1971

2BQ4/3P1k2/8/7K/8/8/8/8

#2

4 + 1

5454 Near Snap 2020
15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe7+?
      • 1...Kg8
        • 2.d8Q#
        • 2.d8R#
      • 1...Kxe7!
  • Keys
    • 1.Qc7!
      • threat
        • 2.d8Q#
      • 1...Ke6
        • 2.d8Q#
      • 1...Kf6
        • 2.d8Q#
        • 2.d8B#
      • 1...Ke7
        • 2.d8Q#
      • 1...Kg7
        • 2.d8Q#
      • 1...Kf8
        • 2.d8Q#
        • 2.d8R#
      • 1...Kg8
        • 2.d8Q#
        • 2.d8R#

Anticipated by 9312(1874), 170467(1944), 2150(1948)

This anticipates 858(1982)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::P=Q
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • P=Q
    • Vars
      • K(a);S_FLIGHT::P=Q
      • K(a);P-FLIGHT::P=Q
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