MESON Chess Problem Database

Problem Display
PID: 66762 (8/8/8/8/6K1/8/4p2Q/1N3k2 w - - 0 1)

Hoffmann, Martin Wolfgang

Tagblatt der Stadt Zurich, 1971

8/8/8/8/6K1/8/4p2Q/1N3k2

#2

3 + 2

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qg1#
    • 1...e1S
      • 2.Sd2#
    • 1...e1R
      • 2.Sd2#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Qh1#
        • 2.Qf2#
      • 1...Ke1
        • 2.Qg1#
        • 2.Qh1#
        • 2.Qxe2#
      • 1...e1Q
        • 2.Qh1#
        • 2.Qg2#
      • 1...e1B
        • 2.Qh1#
        • 2.Qg2#
      • 1...e1S+!
    • 1.Qg2+?
      • 1...Ke1
        • 2.Qg1#
      • 1...Kxg2!
  • Keys
    • 1.Kh3!
      • 1...Ke1
        • 2.Qg1#
      • 1...e1Q
        • 2.Qg2#
      • 1...e1S
        • 2.Sd2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Sd2#
        • 2.Qg2#

This anticipates 76038(2003)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(B)
    • P(b);SBLOCK::S(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • K(C);S_FLIGHT
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • P(b);SBLOCK::QAB1(B)
      • P(b);SBLOCK::S(A)
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