MESON Chess Problem Database

Problem Display
PID: 255593 (2N5/Pk6/2N1B3/P1K5/8/8/8/8 w - - 0 1)

Oleinik, Aleksandr Petrovich

Magadan-60 JT (Kudesnik), 1999

(First published on Wed Mar 10 1999)

2N5/Pk6/2N1B3/P1K5/8/8/8/8

#2

6 + 1

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.a8Q#
  • Tries
    • 1.Sb4?
      • 1...Ka8
        • 2.Bd5#
      • 1...Kc7!
    • 1.Sd4?
      • 1...Ka6
        • 2.a8Q#
      • 1...Ka8
        • 2.Bd5#
      • 1...Kc7!
    • 1.Se5?
      • 1...Ka6
        • 2.a8Q#
      • 1...Ka8
        • 2.Bd5#
      • 1...Kc7!
    • 1.S6e7?
      • 1...Ka6
        • 2.a8Q#
      • 1...Ka8
        • 2.Bd5#
      • 1...Kc7!
    • 1.Sb8?
      • 1...Ka8
        • 2.Bd5#
      • 1...Kc7!
    • 1.Sd8+?
      • 1...Ka6
        • 2.a8Q#
        • 2.a8R#
      • 1...Ka8
        • 2.Bd5#
      • 1...Kc7!
    • 1.Sb6?
      • 1...Ka6
        • 2.Bc8#
        • 2.a8Q#
      • 1...Kc7!
    • 1.Sd6+?
      • 1...Ka6
        • 2.Bc4#
        • 2.Bc8#
        • 2.a8Q#
        • 2.a8R#
      • 1...Kc7
        • 2.a8S#
      • 1...Ka8!
    • 1.a8Q+?
      • 1...Kc7
        • 2.Qa7#
        • 2.Qb8#
      • 1...Kxa8!
    • 1.a8R?
      • threat
        • 2.Ra7#
      • 1...Kc7
        • 2.Ra7#
      • 1...Kxa8!
  • Keys
    • 1.a6+!
      • 1...Kxa6
        • 2.a8Q#
      • 1...Kc7
        • 2.a8S#
      • 1...Ka8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::P=Q
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::P=Q
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::P=Q
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::P=Q
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::P=Q
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(F);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::P=S
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(E)
    • Try
      • P(E);
      • Threat
        • R1(E)
      • Vars
        • K(a);P-FLIGHT::R(E)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
  • Actual
    • P(A);CHECK
    • Vars
      • K(a);N_GUARD,S_FLIGHT,XP(A)::P=Q
      • K(a);N_GUARD,P-FLIGHT::P=S
      • K(a);N_GUARD,S_FLIGHT::S(F)
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