MESON Chess Problem Database

Problem Display
PID: 171425 (8/7p/4p3/4kB2/4N3/3K4/3Q4/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakh-M (Borovich), 1998

8/7p/4p3/4kB2/4N3/3K4/3Q4/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qg5#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Qa5#
      • 1...exf5
        • 2.Qd6#
      • 1...Kxf5!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kxf4!
    • 1.Qh2+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kxf5!
  • Keys
    • 1.Qh6!
      • 1...Kd5
        • 2.Qxe6#
      • 1...Kxf5
        • 2.Qg5#
      • 1...exf5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XB(D)::QAR1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • P(b);SBLOCK,XB(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAB1(A),XP(b)
      • K(a);OGATEB,P-FLIGHT,XB(D)::QAR1(A)
      • P(b);OGATE,SBLOCK,XB(D)::QAB1(A)
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