MESON Chess Problem Database

Problem Display
PID: 246652 (8/2K5/8/8/Q1PkNN2/8/5R2/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Magadanskaya Pravda, 1998

8/2K5/8/8/Q1PkNN2/8/5R2/8

#2

6 + 1

15148 Sadier Collection 2021
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3?
      • 1...Ke3
        • 2.Qa7#
      • 1...Kc5
        • 2.Se6#
      • 1...Ke5
        • 2.Qa1#
      • 1...Kc3!
    • 1.Qd1+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kxe4!
    • 1.Qc2?
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke5!
    • 1.Qc6?
      • 1...Ke5
        • 2.Qd5#
      • 1...Ke3!
    • 1.Qd7+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kxe4!
    • 1.Qe8?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Ke3!
    • 1.Qa8?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Ke5
        • 2.Qd5#
      • 1...Ke3!
  • Keys
    • 1.Sd6!
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke3
        • 2.Qa7#
      • 1...Kc5
        • 2.Se6#
      • 1...Ke5
        • 2.Qa1#

Anticipated by 158052(1986)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAB(B)
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
        • K(a);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
        • K(a);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::S(D)
      • K(a);S_FLIGHT::QAB(B)
      • K(a);S_FLIGHT::S(E)
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