MESON Chess Problem Database

Problem Display
PID: 86480 (3K4/8/1n1kP3/8/2P5/3N4/8/7Q w - - 0 1)

Melnichenko, Aleksandr

Shmatov, Vladimir Afanasievich

Vratnica-64, 2006

3K4/8/1n1kP3/8/2P5/3N4/8/7Q

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sd7
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
  • Tries
    • 1.Qg2?
      • 1...Kxe6
        • 2.Qg6#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa4
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sa8
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#
      • 1...Sxc4!
    • 1.Qe4?
      • threat
        • 2.c5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa4
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...Sxc4!
    • 1.Qb7?
      • threat
        • 2.Qxb6#
      • 1...Sxc4
        • 2.Qd7#
      • 1...Sa4
        • 2.Qd5#
        • 2.Qd7#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qd7#
      • 1...Sd7
        • 2.Qd5#
        • 2.Qxd7#
      • 1...Sa8
        • 2.Qd5#
        • 2.Qd7#
      • 1...Sc8
        • 2.Qd5#
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Qh2+?
      • 1...Kc6
        • 2.Qc7#
      • 1...Kxe6!
  • Keys
    • 1.Qh7!
      • 1...Kc6
        • 2.Qc7#
      • 1...Kxe6
        • 2.Qg6#
      • 1...Sxc4
        • 2.Qd7#
      • 1...Sa4
        • 2.Qd7#
      • 1...Sd5
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sa8
        • 2.Qd7#
      • 1...Sc8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(D)::QAR2(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
        • S(a);N_GUARD::QAR1(A)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(A);
      • Threat
        • P(C)
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
        • S(a);N_GUARD::QAR1(A)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XS(a)
      • Vars
        • S(a);N_GUARD,XP(C)::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XP(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XP(D)
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);OGATEB,P-FLIGHT,XP(D)::QAR2(A)
      • S(a);N_GUARD,XP(C)::QAR1(A)
      • S(a);N_GUARD::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
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