MESON Chess Problem Database

Problem Display
PID: 86515 (rn6/kPQ5/3P4/3K4/8/8/8/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

The Problemist, 1968

rn6/kPQ5/3P4/3K4/8/8/8/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.b8Q#
      • 2.b8B#
    • 1...Sc6
      • 2.b8S#
    • 1...Sd7
      • 2.b8S#
  • Tries
    • 1.Ke4?
      • 1...Sa6
        • 2.b8Q#
        • 2.b8B#
      • 1...Sc6
        • 2.b8S#
      • 1...Sd7
        • 2.b8S#
      • 1...Ka6!
    • 1.Ke6?
      • 1...Sa6
        • 2.b8Q#
        • 2.b8B#
      • 1...Sc6
        • 2.b8S#
      • 1...Sd7
        • 2.b8S#
      • 1...Ka6!
    • 1.Qc5+?
      • 1...Ka6
        • 2.bxa8Q#
      • 1...Kxb7!
    • 1.Qc6?
      • threat
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...Sa6
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...Sd7
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...Sxc6!
    • 1.d7?
      • 1...Sxd7
        • 2.b8S#
      • 1...Sa6
        • 2.b8Q#
        • 2.b8B#
      • 1...Sc6
        • 2.b8S#
      • 1...Ka6!
    • 1.bxa8S+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxa8!
  • Keys
    • 1.Kc4!
      • 1...Ka6
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...Sa6
        • 2.b8Q#
        • 2.b8B#
      • 1...Sc6
        • 2.b8S#
      • 1...Sd7
        • 2.b8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,SBLOCK::P=Q
    • S(c);OGATE::P=S
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(c);OGATE,SBLOCK::P=Q
        • S(c);OGATE::P=S
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(c);OGATE,SBLOCK::P=Q
        • S(c);OGATE::P=S
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::PXR(b)=Q
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • Q(D);
      • Threat
        • PXR(b)=Q
      • Vars
        • S(c);::PXR(b)=Q
      • Refutation
        • S(c);XQ(D)
    • Try
      • P(B);
      • Vars
        • S(c);OGATE,XP(B)::P=S
        • S(c);OGATE,SBLOCK::P=Q
        • S(c);OGATE::P=S
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);CHECK,XR(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • K(a);P-FLIGHT::PXR(b)=Q
      • S(c);OGATE,SBLOCK::P=Q
      • S(c);OGATE::P=S
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