MESON Chess Problem Database

Problem Display
PID: 16959 (4b3/3PKp2/8/3Nk3/1P1pPp2/8/4Q3/8 w - - 0 1)

Ojanen, Antti Gottfried

Suomen Shakki, 1944

4b3/3PKp2/8/3Nk3/1P1pPp2/8/4Q3/8

#2

6 + 5

3310 2345 Chess Problems 1997
136 Problem Observer 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qh5+?
      • 1...f5
        • 2.Qxf5#
      • 1...Kxe4!
    • 1.d8Q?
      • threat
        • 2.Qc7#
        • 2.Qd6#
        • 2.Qb8#
      • 1...Bd7
        • 2.Qc7#
        • 2.Qb8#
      • 1...d3!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sg4#
        • 2.Qb5#
        • 2.Qh5#
      • 1...Bxd7
        • 2.Sxd7#
      • 1...d3
        • 2.Qb2#
      • 1...f3
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAR1(A),XP(d)
      • Refutation
        • K(c);P-FLIGHT,XP(C)
    • Try
      • P(E);
      • Threat
        • DUALS(3)
      • Refutation
        • P(a);
  • Actual
    • S(D);
    • Threat
      • DUALS(3)
    • Vars
      • B(e);XP(E)::S(D),XB(e)
      • P(a);OGATEB::QAB(A)
      • P(b);OGATEB::QAB(A)
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