MESON Chess Problem Database

Problem Display
PID: 144388 (5N2/2p3K1/3k4/2pp4/7B/2n1NB2/8/5Q2 w - - 0 1)

Osborne, PL

British Chess Magazine, 1898

5N2/2p3K1/3k4/2pp4/7B/2n1NB2/8/5Q2

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qa6#
    • 1...d4
      • 2.Sc4#
  • Tries
    • 1.Sf5+?
      • 1...Kc6
        • 2.Qa6#
      • 1...Ke5!
    • 1.Bg3+?
      • 1...Kc6
        • 2.Qa6#
      • 1...Ke7!
    • 1.Qa6+?
      • 1...Ke5
        • 2.Qf6#
      • 1...c6!
  • Keys
    • 1.Qc4!
      • 1...Ke5
        • 2.Bg3#
      • 1...Kc6
        • 2.Qa6#
      • 1...dxc4
        • 2.Sxc4#
      • 1...Se4
        • 2.Qxd5#
      • 1...Sb1
        • 2.Qxd5#
      • 1...Sd1
        • 2.Qxd5#
      • 1...Sa2
        • 2.Qxd5#
      • 1...Se2
        • 2.Qxd5#
      • 1...Sa4
        • 2.Qxd5#
      • 1...Sb5
        • 2.Qxd5#
      • 1...d4
        • 2.Qe6#
      • 1...c6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT,P_SPINP(c)::QAR2(A)
    • P(c);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(c)::QAR2(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(c)::QAR2(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • Q(A);
    • Vars
      • K(d);S_FLIGHT::B(D)
      • K(d);P-FLIGHT,P_SPINP(b)::QAR2(A)
      • P(c);XQ(A)::S(B),XP(c)
      • S(a);N_GUARD::QAR1(A),XP(c)
      • P(c);OGATE::QAR1(A)
      • P(e);SBLOCK::QAB(A)
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