MESON Chess Problem Database

Problem Display
PID: 245919 (8/6P1/2pp4/4p3/KNk5/4Q3/8/8 w - - 0 1)

Kopyl, Valery Volodimirovich

Pat a Mat, 2007

8/6P1/2pp4/4p3/KNk5/4Q3/8/8

#2

4 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qd3#
  • Tries
    • 1.Sa2?
      • 1...Kd5
        • 2.g8Q#
        • 2.g8B#
      • 1...c5
        • 2.Qe4#
      • 1...d5
        • 2.Qc3#
      • 1...e4!
    • 1.Sd5?
      • threat
        • 2.Sb6#
      • 1...Kxd5
        • 2.g8Q#
        • 2.g8B#
      • 1...cxd5!
    • 1.Sxc6?
      • 1...e4
        • 2.Qd4#
      • 1...d5
        • 2.Sa5#
        • 2.Sxe5#
      • 1...Kd5!
  • Keys
    • 1.Sc2!
      • 1...Kd5
        • 2.g8Q#
        • 2.g8B#
      • 1...e4
        • 2.Qd4#
      • 1...c5
        • 2.Qb3#
      • 1...d5
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::P=Q
        • P(c);SBLOCK::QAR2(A)
        • P(d);SBLOCK::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(a);S_FLIGHT,XS(C)::P=Q
      • Refutation
        • P(c);XS(C)
    • Try
      • S(C);XP(c)
      • Vars
        • P(b);N_GUARD::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::P=Q
      • P(b);N_GUARD::QAR1(A)
      • P(c);SBLOCK::QAB1(A)
      • P(d);SBLOCK::S(C)
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