MESON Chess Problem Database

Problem Display
PID: 162001 (8/3N4/1p2p3/1P5p/2PNkpbK/3q1p2/p1Q2P2/B2B4 w - - 0 1)

Baird, Edith Elina Helen (Mrs WJ)

The Observer, 1923

(First published on Sun Nov 4 1923)

8/3N4/1p2p3/1P5p/2PNkpbK/3q1p2/p1Q2P2/B2B4

#2

9 + 9

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Bxc2#
    • 1...Bh3
      • 2.Bxf3#
    • 1...Bf5
      • 2.Bxf3#
    • 1...e5
      • 2.Sf6#
  • Tries
    • 1.Kg5?
      • 1...Qxc2
        • 2.Bxc2#
      • 1...Bh3
        • 2.Bxf3#
      • 1...Bf5
        • 2.Bxf3#
      • 1...e5
        • 2.Sf6#
      • 1...h4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Qxd3#
      • 1...Qxc2
        • 2.Bxc2#
      • 1...Bxf5
        • 2.Sf6#
      • 1...exf5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XQ(C)::B(B),XQ(b)
    • B(f);N_GUARD::B(B),XP(c)
    • P(i);SBLOCK::S(I)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XQ(C)::B(B),XQ(b)
        • B(f);N_GUARD::B(B),XP(c)
        • P(i);SBLOCK::S(I)
      • Refutation
        • P(g);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT,XS(F)::QAB(C),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XQ(C)::B(B),XQ(b)
      • B(f);SBLOCK,XS(F)::S(I)
      • P(i);SBLOCK,XS(F)::S(I)
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