MESON Chess Problem Database

Problem Display
PID: 177757 (3Q4/8/BBk5/8/1K6/8/8/8 w - - 0 1)

Peretyaka, Viktor Yakovlevich

Sahs (Latvia), 1988

3Q4/8/BBk5/8/1K6/8/8/8

#2

4 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qf6+?
      • 1...Kd5
        • 2.Bb7#
      • 1...Kd7!
    • 1.Qd5+?
      • 1...Kxb6
        • 2.Qb7#
      • 1...Kxd5!
    • 1.Qd7+?
      • 1...Kxb6
        • 2.Qb7#
      • 1...Kxd7!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe6#
      • 1...Kd5
        • 2.Bb7#
      • 1...Kxb6
        • 2.Qb7#

This anticipates 152919(2005)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT,XB(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XB(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • K(a);S_FLIGHT::B(B)
      • K(a);P-FLIGHT,XB(C)::QAR1(D)
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