MESON Chess Problem Database

Problem Display
PID: 148582 (2N3K1/7B/4pk2/1Q4p1/4pq2/p3N3/8/8 w - - 0 1)

Maximov, Nikolai J

British Chess Magazine, 1901

2N3K1/7B/4pk2/1Q4p1/4pq2/p3N3/8/8

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Sg4#
    • 1...Qe5
      • 2.Sg4#
    • 1...Qd6
      • 2.Sg4#
    • 1...Qc7
      • 2.Sg4#
    • 1...Qb8
      • 2.Sg4#
    • 1...Qf1
      • 2.Sg4#
    • 1...Qf2
      • 2.Sg4#
    • 1...Qg4
      • 2.Sxg4#
    • 1...e5
      • 2.Qa6#
      • 2.Qc6#
      • 2.Qb6#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qg7#
      • 1...Qc7
        • 2.Sg4#
      • 1...e5
        • 2.Sd5#
        • 2.Qc6#
        • 2.Qd6#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Ke5!
    • 1.Qb2+?
      • 1...Qe5
        • 2.Sg4#
      • 1...e5
        • 2.Qb6#
      • 1...axb2!
    • 1.Qe5+?
      • 1...Qxe5
        • 2.Sg4#
      • 1...Kxe5!
    • 1.Qb7?
      • threat
        • 2.Qg7#
      • 1...Qc7
        • 2.Sg4#
      • 1...e5
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qb6#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Ke5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Sg4#
      • 1...Ke5
        • 2.Qa1#
      • 1...g4
        • 2.Qxf4#
      • 1...e5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::S(A)
    • Q(c);N_GUARD,P_PINS(D)::S(A)
    • Q(c);N_GUARD::S(A),XQ(c)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(c);N_GUARD::S(A)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::S(A)
        • P(e);OGATEB,P_SPINP(e),SBLOCK::QAR(B)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • Q(c);XQ(B)::S(A)
      • Refutation
        • K(f);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(c);N_GUARD::S(A)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • Q(B);P_PINQ(c)
    • Threat
      • S(A)
    • Vars
      • K(f);N_SPINQ(c),S_FLIGHT::QAB(B)
      • P(d);N_GUARD::QAR2(B),XQ(c)
      • P(e);OGATEB,SBLOCK::QAR(B)
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