MESON Chess Problem Database

Problem Display
PID: 62412 (B7/4K1p1/8/2p1k3/2p2p1N/1nq2p2/Q4P2/4N3 w - - 0 1)

Gold, Samuel

The Chess Monthly (Hoffer), 1879

B7/4K1p1/8/2p1k3/2p2p1N/1nq2p2/Q4P2/4N3

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sexf3#
    • 1...Qb2
      • 2.Sexf3#
    • 1...Qd2
      • 2.Sexf3#
    • 1...Qb4
      • 2.Sexf3#
    • 1...Qd4
      • 2.Sexf3#
    • 1...Qa5
      • 2.Sexf3#
    • 1...Qc1
      • 2.Sexf3#
    • 1...Qc2
      • 2.Sexf3#
  • Tries
    • 1.Qe2+?
      • 1...Kd4
        • 2.Sf5#
        • 2.Qe4#
      • 1...Qe3
        • 2.Sexf3#
      • 1...fxe2!
    • 1.Qa6?
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Qd6#
      • 1...Qd2
        • 2.Sexf3#
      • 1...Qd4
        • 2.Sexf3#
        • 2.Qe6#
      • 1...Qd3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Sexf3#
      • 1...Kd4
        • 2.Shxf3#
      • 1...Sd2
        • 2.Qxc3#
      • 1...Sd4
        • 2.Qb8#

FEATURES

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