MESON Chess Problem Database

Problem Display
PID: 275195 (3N3b/prp5/2R5/3kp3/1p1n3R/6B1/NKPQ2q1/5b1B w - - 0 1)

Lyness, Robert Cranston

British Chess Magazine, 1935

3N3b/prp5/2R5/3kp3/1p1n3R/6B1/NKPQ2q1/5b1B

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Bxe4#
    • 1...Bb5
      • 2.Sxb4#
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Bxg2+?
      • 1...e4
        • 2.Bxe4#
      • 1...Bxg2!
  • Keys
    • 1.Qxb4!
      • threat
        • 2.Sc3#
      • 1...Rxb4+
        • 2.Sxb4#
      • 1...Se2
        • 2.c4#
      • 1...Sb5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(b);OGATE::B(A),XQ(b)
    • B(a);S_CUTR(h)::S(B),XP(c)
    • P(c);N_GUARD::S(B)
  • Tries
    • Try
      • B(A);CHECK,XQ(b)
      • Vars
        • P(f);P_SPINP(f)::B(A),XP(f)
      • Refutation
        • B(a);XB(A)
  • Actual
    • Q(E);N_PINS(d),P_SPINP(D),P_SPINQ(E),XP(c)
    • Threat
      • S(B)
    • Vars
      • R(h);CHECK,XQ(E)::S(B),XR(h)
      • S(d);N_PINP(D)::P(D)
      • S(d);N_PINQ(E)::QAR1(E)
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