MESON Chess Problem Database

Problem Display
PID: 60909 (Q7/1K2p3/4p2N/P6n/7k/4p1R1/4B3/4B3 w - - 0 1)

Dyachuk, Vasyl Vasilovich

2nd HM., Chervoni Girnik, 1998

Q7/1K2p3/4p2N/P6n/7k/4p1R1/4B3/4B3

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Sf5#
  • Tries
    • 1.Sf7?
      • 1...Sxg3
        • 2.Qh8#
      • 1...Sf4
        • 2.Rxe3#
      • 1...Sf6
        • 2.Rxe3#
      • 1...Sg7
        • 2.Rxe3#
      • 1...e5!
    • 1.Qb8?
      • 1...Sxg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sg7
        • 2.Qf4#
      • 1...e5
        • 2.Sf5#
      • 1...Sf6!
    • 1.Qe8?
      • threat
        • 2.Qxh5#
      • 1...Sxg3
        • 2.Qh5#
      • 1...Sf4
        • 2.Qxe7#
      • 1...Sg7
        • 2.Qa4#
        • 2.Qxe7#
      • 1...Sf6!
    • 1.Qg8?
      • threat
        • 2.Qg4#
        • 2.Qg5#
      • 1...Sxg3
        • 2.Qxg3#
        • 2.Qg4#
      • 1...Sf6
        • 2.Rxe3#
        • 2.Qg5#
      • 1...Sg7!
  • Keys
    • 1.Qh8!
      • 1...Sxg3
        • 2.Sf7#
      • 1...Sf4
        • 2.Sf5#
      • 1...Sf6
        • 2.Sf5#
      • 1...Sg7
        • 2.Sf5#
      • 1...e5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::S(E)
  • Tries
    • Try
      • S(E);
      • Vars
        • S(c);OGATEB,P_SPINS(c),XR(C)::QAR(G)
        • S(c);N_GUARD::B(A)+R(C),XP(a)
      • Refutation
        • P(d);
    • Try
      • Q(G);
      • Vars
        • S(c);OGATE,P_SPINS(c),XR(C)::QAB1(G),XS(c)
        • S(c);N_GUARD::QAR2(G),XS(c)
        • S(c);N_GUARD::QAR2(G)
        • P(d);N_GUARD::S(E)
      • Refutation
        • S(c);
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XS(c)
      • Vars
        • S(c);P_SPINS(c),XR(C)::QAR1(G)
        • S(c);N_GUARD::QAB(G),XP(e)
      • Refutation
        • S(c);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Refutation
        • S(c);
  • Actual
    • Q(G);
    • Vars
      • S(c);P_SPINS(c),XR(C)::QAR(G)+S(E)
      • S(c);::QAR(G)+S(E),DCHECK
      • P(d);N_GUARD::S(E)
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