MESON Chess Problem Database

Problem Display
PID: 21324 (7K/8/5Q2/B7/8/2n2P1B/6Rp/b4k2 w - - 0 1)

Sparke, Arthur M

1st Prize, Good Companions (February Meredith Ty.), 1918

7K/8/5Q2/B7/8/2n2P1B/6Rp/b4k2

#2

6 + 4

15 British Chess Magazine 1918
3132 The Good Companion Two-Mover 1922
5501 Chess Cameos 1936
3310 2345 Chess Problems 1997
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qxa1#
    • 1...Se4
      • 2.Qxa1#
    • 1...Sb5
      • 2.Qxa1#
    • 1...Sd5
      • 2.Qxa1#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qf2#
      • 1...h1S
        • 2.Qg1#
      • 1...Sb1
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rxh2#
      • 1...Sd1
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rxh2#
      • 1...Sa2
        • 2.Rxa2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rxh2#
      • 1...Se2
        • 2.Rg1#
        • 2.Rxh2#
        • 2.Rg3#
        • 2.Rg4#
        • 2.Rg5#
        • 2.Rg6#
        • 2.Rg7#
        • 2.Rg8#
      • 1...Sa4
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rxh2#
        • 2.Qxa1#
      • 1...Se4
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rxh2#
        • 2.Qxa1#
      • 1...Sb5
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rxh2#
        • 2.Qxa1#
      • 1...Sd5
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rxh2#
        • 2.Qxa1#
      • 1...Ke1!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qf2#
      • 1...Sb1+
        • 2.Rb2#
      • 1...Sd1+
        • 2.Rb2#
      • 1...Sa2+
        • 2.Rb2#
      • 1...Se2+
        • 2.Rg7#
      • 1...Sa4+
        • 2.Rb2#
      • 1...Se4+
        • 2.Rb2#
      • 1...Sb5+
        • 2.Rb2#
      • 1...Sd5+
        • 2.Rb2#
      • 1...Ke1
        • 2.Qb1#
      • 1...h1S
        • 2.Qg1#

This anticipates 16913(1944)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(d);OGATE,P_PINQ(E)::QAR(E),XB(a)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(c);N_GUARD::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT,P_SPINS(d)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • S(d);CHECK::B(C)+R(A)
      • S(d);CHECK,SBLOCK::B(C)+R(A)
      • K(b);P-FLIGHT,P_SPINS(d)::QAR(E)
      • P(c);N_GUARD::QAR1(E)
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