MESON Chess Problem Database

Problem Display
PID: 238044 (8/8/6p1/7k/5Qp1/8/2B5/6K1 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Mat, 1984

8/8/6p1/7k/5Qp1/8/2B5/6K1

#2

3 + 3

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Bd1#
    • 1...g5
      • 2.Qh2#
  • Tries
    • 1.Kf1?
      • 1...g5
        • 2.Qh2#
      • 1...g3
        • 2.Bd1#
      • 1...Kh4!
    • 1.Kh1?
      • 1...g5
        • 2.Qh2#
      • 1...g3
        • 2.Bd1#
      • 1...Kh4!
    • 1.Kf2?
      • 1...Kh4
        • 2.Qh6#
      • 1...g5
        • 2.Qh2#
      • 1...g3+!
    • 1.Bd1?
      • 1...Kh4
        • 2.Qxg4#
      • 1...g5!
    • 1.Bd3?
      • 1...g5
        • 2.Qh2#
      • 1...g3
        • 2.Be2#
      • 1...Kh4!
    • 1.Be4?
      • 1...g5
        • 2.Qh2#
      • 1...g3
        • 2.Bf3#
      • 1...Kh4!
    • 1.Qxg4+?
      • 1...Kh6
        • 2.Qxg6#
      • 1...Kxg4!
    • 1.Qf6?
      • 1...Kh6
        • 2.Qxg6#
      • 1...g5
        • 2.Qh8#
      • 1...g3!
  • Keys
    • 1.Kg2!
      • 1...Kh4
        • 2.Qh6#
      • 1...g5
        • 2.Qh2#
      • 1...g3
        • 2.Bd1#

Anticipated by 156896(1887)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::B(B)
    • P(c);SBLOCK::QAR(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR(C)
        • P(a);OGATEB::B(B)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR(C)
        • P(a);OGATEB::B(B)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR2(C)
        • P(c);SBLOCK::QAR(C)
      • Refutation
        • P(a);CHECK
    • Try
      • B(B);P_PINP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(a)
      • Refutation
        • P(c);
    • Try
      • B(B);
      • Vars
        • P(c);SBLOCK::QAR(C)
        • P(a);OGATEB::B(B)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • B(B);
      • Vars
        • P(c);SBLOCK::QAR(C)
        • P(a);OGATEB::B(B)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • Q(C);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(C),XP(c)
        • P(c);SBLOCK::QAR(C)
      • Refutation
        • P(a);
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(C)
      • P(c);SBLOCK::QAR(C)
      • P(a);OGATEB::B(B)
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