MESON Chess Problem Database

Problem Display
PID: 186036 (1Qn4q/7p/3pp2N/4kNP1/2p5/p7/3P2Bb/K1B5 w - - 0 1)

Marshall, Burney Means

British Chess Magazine, 1918

1Qn4q/7p/3pp2N/4kNP1/2p5/p7/3P2Bb/K1B5

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4+
      • 2.d4#
    • 1...Sb6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qxd6#
    • 1...Se7
      • 2.Qxd6#
    • 1...c3
      • 2.d4#
  • Tries
    • 1.Qb2+?
      • 1...Kf4
        • 2.d3#
        • 2.d4#
      • 1...c3
        • 2.d4#
      • 1...axb2+!
    • 1.Qb5+?
      • 1...Kf4+
        • 2.d4#
      • 1...d5!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qe3#
      • 1...Kf4+
        • 2.d4#
      • 1...cxb3
        • 2.d4#
      • 1...Bg1
        • 2.Qg3#
      • 1...Bf4
        • 2.Qc3#
      • 1...c3
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(d);CHECK,S_FLIGHT::B(B)+P(C)
    • S(h);N_GUARD::QAB1(H),XP(e)
    • P(c);N_GUARD::P(C)
  • Tries
    • Try
      • Q(H);CHECK,N_PINP(e)
      • Vars
        • P(c);P_SPINP(c)::P(C)
      • Refutation
        • P(b);CHECK,XQ(H)
    • Try
      • Q(H);CHECK,N_PINP(e)
      • Vars
        • K(d);CHECK,S_FLIGHT::B(B)+P(C)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • Q(H);N_PINP(e)
    • Threat
      • QAR2(H)
    • Vars
      • K(d);CHECK,S_FLIGHT::B(B)+P(C)
      • P(c);N_GUARD,XQ(H)::P(C)
      • B(a);N_GUARD::QAB(H)
      • B(a);SBLOCK::QAB(H)
      • P(c);N_GUARD::P(C)
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