MESON Chess Problem Database

Problem Display
PID: 11236 (Rn6/Nk6/1P2K3/1Q6/8/8/8/8 w - - 0 1)

Mott-Smith, Geoffrey

The Chess Review, 1937

Rn6/Nk6/1P2K3/1Q6/8/8/8/8

#2

5 + 2

3295 Einfuhrung in die Welt des Schachproblem 1984
3713 Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Qc6#
  • Tries
    • 1.Qc6+?
      • 1...Ka6
        • 2.Sb5#
        • 2.Sc8#
      • 1...Sxc6!
  • Keys
    • 1.Sc8!
      • 1...Kxa8
        • 2.b7#
      • 1...Kxc8
        • 2.Qd7#
      • 1...Sc6
        • 2.Qa6#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#

This anticipates 178747(1954)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);XQ(A)
  • Actual
    • S(D);
    • Vars
      • K(a);OGATE,S_FLIGHT,XR(E)::P(B)
      • K(a);P_SPINS(b),S_FLIGHT,XS(D)::QAB1(A)
      • S(b);N_GUARD,SBLOCK::QAB1(A)
      • S(b);N_GUARD::QAB(A)
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