MESON Chess Problem Database

Problem Display
PID: 161527 (2B5/8/8/8/7B/3q4/8/Q3Nk1K w - - 0 1)

Antipov, Viacheslav Pavlovich

Sa ogneupory, 1987

2B5/8/8/8/7B/3q4/8/Q3Nk1K

#2

5 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Bxa6#
      • 2.Qxa6#
  • Tries
    • 1.Sc2+?
      • 1...Qd1
        • 2.Ba6#
        • 2.Qxd1#
      • 1...Ke2!
    • 1.Sg2+?
      • 1...Qb1
        • 2.Ba6#
      • 1...Qd1
        • 2.Ba6#
        • 2.Qxd1#
      • 1...Ke2!
    • 1.Sf3+?
      • 1...Qb1
        • 2.Ba6#
      • 1...Qd1
        • 2.Ba6#
        • 2.Qxd1#
      • 1...Ke2!
    • 1.Ba6?
      • threat
        • 2.Bxd3#
      • 1...Qxa6
        • 2.Qxa6#
      • 1...Qe2
        • 2.Sc2#
        • 2.Sg2#
        • 2.Sf3#
        • 2.Qf6#
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qb5
        • 2.Bxb5#
      • 1...Ke2!
    • 1.Qf6+?
      • 1...Qf5
        • 2.Ba6#
      • 1...Qf3+
        • 2.Qxf3#
      • 1...Ke2!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qxd3#
      • 1...Ke2
        • 2.Qxd3#
      • 1...Qxa6
        • 2.Bxa6#
      • 1...Qe2
        • 2.Bh3#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::B(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::B(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(E);P_PINQ(b)
      • Threat
        • B(E),XQ(b)
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XB(E)::QAB(A),XQ(b)
        • Q(b);OGATEB::B(E),XQ(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::B(E)
        • Q(b);CHECK,N_GUARD,P_SPINQ(b)::QAR2(A),XQ(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);P_PINQ(b)
    • Threat
      • QAB(A),XQ(b)
    • Vars
      • K(a);S_FLIGHT::QAB1(A),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XQ(A)::B(E),XQ(b)
      • Q(b);::B(E)
      • Q(b);OGATEB::QAB(A),XQ(b)
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