MESON Chess Problem Database

Problem Display
PID: 230972 (8/8/8/4pkNK/5P2/8/7Q/8 w - - 0 1)

Chernikh, Vassily

Kudesnik, 2006

8/8/8/4pkNK/5P2/8/7Q/8

#2

4 + 2

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qxe5#
      • 1...Kxf4
        • 2.Qf2#
      • 1...Kf6
        • 2.Qxe5#
      • 1...e4
        • 2.Qe5#
      • 1...exf4!
    • 1.Qe2?
      • threat
        • 2.Qxe5#
      • 1...Kxf4
        • 2.Qf3#
        • 2.Qf2#
      • 1...Kf6
        • 2.Qxe5#
      • 1...exf4
        • 2.Qe6#
      • 1...e4!
    • 1.Qh3+?
      • 1...Kxf4
        • 2.Qf3#
      • 1...Kf6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qf7#
      • 1...Kxf4
        • 2.Qf2#
      • 1...Kf6
        • 2.Qf7#
      • 1...exf4
        • 2.Qe6#

Anticipated by 181773(1905)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
        • P(a);::QAR1(A)
      • Refutation
        • P(a);XP(B)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(A),XP(a)
        • P(a);OGATE,SBLOCK,XP(B)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(B)::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
      • K(b);P-FLIGHT::QAR1(A)
      • P(a);SBLOCK,XP(B)::QAB1(A)
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