MESON Chess Problem Database

Problem Display
PID: 172329 (8/1K2pp2/4p3/4k3/2Q5/6R1/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

8/1K2pp2/4p3/4k3/2Q5/6R1/8/8

#2

3 + 4

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd4#
    • 1...Kf6
      • 2.Qf4#
  • Tries
    • 1.Rg5+?
      • 1...Kd6
        • 2.Qd3#
        • 2.Qd4#
        • 2.Qc6#
        • 2.Qc7#
      • 1...Kf6
        • 2.Qf4#
      • 1...f5!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6
        • 2.Qf4#
      • 1...Kxe4!
  • Keys
    • 1.Rg4!
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf6
        • 2.Qf4#
      • 1...f5
        • 2.Qd4#
      • 1...f6
        • 2.Qc5#

Anticipated by 84506(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
  • Actual
    • R(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::QAR2(B)
      • P(d);SBLOCK::QAB1(B)
      • P(d);SBLOCK::QAR2(B)
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