MESON Chess Problem Database

Problem Display
PID: 11789 (8/p2R2P1/NpP5/1k1NB2R/1P3P2/8/1K6/7B w - - 0 1)

Myllyniemi, Matti Arvo

Deutsche Schachzeitung, 1972

8/p2R2P1/NpP5/1k1NB2R/1P3P2/8/1K6/7B

#2

11 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Sc3#
    • 1...Kxa6
      • 2.Sc7#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Sdc7#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6!
    • 1.Sc3+?
      • 1...Kc4
        • 2.Rd4#
        • 2.g8Q#
        • 2.g8B#
      • 1...Kxa6!
    • 1.Sdc7+?
      • 1...Kc4
        • 2.Rd4#
        • 2.g8Q#
        • 2.g8B#
      • 1...Ka4!
    • 1.Bg2?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Bf1#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6!
    • 1.Bf3?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Be2#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6!
    • 1.Bc3?
      • 1...Kc4
        • 2.Se3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sf6#
      • 1...Ka4!
    • 1.Bd4?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sxb6#
        • 2.Sf6#
      • 1...Kc4!
    • 1.Bd6?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sf6#
      • 1...Kc4!
    • 1.Bf6?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Se3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6!
    • 1.Bc7?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Se3#
      • 1...Kxc6
        • 2.Sxb6#
        • 2.Sf6#
      • 1...Kxa6!
    • 1.Rh6?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kc4!
    • 1.Rd6?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kc4!
    • 1.Rxa7?
      • 1...Ka4
        • 2.Sc3#
        • 2.Sac7#
      • 1...Kxc6
        • 2.Sc3#
      • 1...Kc4!
    • 1.Rb7?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sc3#
      • 1...Kc4!
    • 1.Re7?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sc3#
        • 2.Sdc7#
      • 1...Kc4!
    • 1.Rf7?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sc3#
        • 2.Sdc7#
      • 1...Kc4!
    • 1.Rd8?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sc3#
        • 2.Sdc7#
      • 1...Kc4!
    • 1.g8Q?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Sc3#
        • 2.Sdc7#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6!
    • 1.g8B?
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Sc3#
        • 2.Sdc7#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6!
  • Keys
    • 1.Bb8!
      • 1...Ka4
        • 2.Sc3#
      • 1...Kc4
        • 2.Se3#
      • 1...Kxa6
        • 2.Sc7#
      • 1...Kxc6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(E)
    • K(a);S_FLIGHT,XS(H)::S(E)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • S(E)
      • Vars
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(H)
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT::B(A)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT::B(A)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • B(F);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
        • K(a);S_FLIGHT,XP(I)::B(A)+S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
        • K(a);S_FLIGHT,XP(I)::B(A)+S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • B(F);
      • Vars
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT,XS(H)
    • Try
      • R(G);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(J);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(J);XP(c)
      • Vars
        • K(a);S_FLIGHT,XP(I)::B(A)+S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(J);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::S(E)
        • K(a);N_SPINP(b),S_FLIGHT,XS(H)::S(E)
        • K(a);N_SPINP(b),S_FLIGHT,XP(I)::B(A)+S(E)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • R(J);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(J);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(J);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(K);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • P(K);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT,XS(H)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
  • Actual
    • B(F);
    • Vars
      • K(a);S_FLIGHT::S(E)
      • K(a);S_FLIGHT,XS(H)::S(E)
      • K(a);S_FLIGHT,XP(I)::B(A)+S(E)
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