MESON Chess Problem Database

Problem Display
PID: 133486 (8/8/3B1Q2/8/8/8/3p3N/4kB1K w - - 0 1)

Markovtsy, Vassyl Yuriovich

5th Prize, Cyrulik MT, 1997

8/8/3B1Q2/8/8/8/3p3N/4kB1K

#2

5 + 2

133 The Problemist Supplement 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d1B
      • 2.Bb4#
  • Tries
    • 1.Kg1?
      • 1...d1Q
        • 2.Qf2#
      • 1...d1S
        • 2.Sf3#
      • 1...d1B
        • 2.Bb4#
        • 2.Qc3#
        • 2.Qf2#
      • 1...d1R
        • 2.Sf3#
        • 2.Qf2#
      • 1...Kd1!
    • 1.Kg2?
      • 1...d1Q
        • 2.Qf2#
      • 1...d1S
        • 2.Sf3#
      • 1...d1B
        • 2.Bb4#
        • 2.Qc3#
        • 2.Qf2#
      • 1...d1R
        • 2.Sf3#
        • 2.Qf2#
      • 1...Kd1!
    • 1.Qc3?
      • 1...Kf2
        • 2.Bg3#
        • 2.Qxd2#
        • 2.Qg3#
      • 1...Kd1!
    • 1.Qe5+?
      • 1...Kf2
        • 2.Bc5#
        • 2.Qg3#
        • 2.Qe2#
      • 1...Kd1!
    • 1.Qe7+?
      • 1...Kf2
        • 2.Qe2#
      • 1...Kd1!
    • 1.Qf3?
      • threat
        • 2.Bg3#
        • 2.Qe2#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Bb4#
      • 1...d1R
        • 2.Qe2#
        • 2.Qe3#
      • 1...d1Q!
    • 1.Qe6+?
      • 1...Kf2
        • 2.Qe2#
      • 1...Kd1!
  • Keys
    • 1.Qb2!
      • 1...Kd1
        • 2.Qb1#
      • 1...Kf2
        • 2.Qxd2#
      • 1...d1Q
        • 2.Bg3#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Bg3#
        • 2.Bb4#
      • 1...d1R
        • 2.Bg3#
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATEB,SBLOCK::B(D)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAB1(E)
        • P(b);SBLOCK::S(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(b);SBLOCK::QAB1(E)
        • P(b);SBLOCK::S(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);P_PINP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(E)
        • P(b);OGATEB::B(D)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);P-FLIGHT::QAR2(E)
      • K(a);P_SPINP(b),S_FLIGHT::QAR2(E),XP(b)
      • P(b);SBLOCK::B(D)
      • P(b);OGATE::QAR1(E)
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