MESON Chess Problem Database

Problem Display
PID: 21158 (8/8/8/7Q/7K/4B3/2Rp1p2/4k3 w - - 0 1)

Opdenoordt, Joseph J

4th Prize=, Good Companions (February Meredith Ty.), 1917

8/8/8/7Q/7K/4B3/2Rp1p2/4k3

#2

4 + 3

2012 Miniature Chess Problems from Many Countries 1981
3295 Einfuhrung in die Welt des Schachproblem 1984
3310 2345 Chess Problems 1997
133 The Problemist Supplement 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d1S
      • 2.Qe2#
    • 1...d1R
      • 2.Qe2#
  • Tries
    • 1.Rxd2?
      • threat
        • 2.Rd1#
        • 2.Qd1#
        • 2.Qe2#
      • 1...f1Q
        • 2.Rd1#
        • 2.Qd1#
      • 1...f1B
        • 2.Rd1#
        • 2.Qd1#
      • 1...Kf1!
  • Keys
    • 1.Qf3!
      • 1...Kf1
        • 2.Qxf2#
      • 1...d1Q
        • 2.Qxf2#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Qxf2#
      • 1...d1R
        • 2.Qe2#
        • 2.Qxf2#
      • 1...f1Q
        • 2.Bxd2#
      • 1...f1S
        • 2.Bf2#
      • 1...f1B
        • 2.Bxd2#
        • 2.Bf2#
      • 1...f1R
        • 2.Bxd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(b);::QAR1(D)
  • Tries
    • Try
      • R(A);XP(b)
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c)::QAR1(D),XP(c)
      • P(b);SBLOCK::QAB1(D),XP(c)
      • P(b);::QAR1(D)
      • P(c);::B(B),XP(b)
      • P(c);SBLOCK::B(B)
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Developed and maintained by Brian Stephenson.
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