MESON Chess Problem Database

Problem Display
PID: 11699 (8/6pk/7p/3B4/4K3/2BQ4/8/8 w - - 0 1)

ellinghoven, bernd

Deutsche Schachzeitung, 1971

8/6pk/7p/3B4/4K3/2BQ4/8/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000
5454 Near Snap 2008
15148 Sadier Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Ke3#
      • 2.Kf3#
  • Tries
    • 1.Qf3?
      • 1...Kg6
        • 2.Qf5#
      • 1...h5
        • 2.Qxh5#
      • 1...g6
        • 2.Qf7#
      • 1...g5
        • 2.Qf5#
        • 2.Qf7#
      • 1...Kh8!
    • 1.Qg3?
      • threat
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...g6
        • 2.Qc7#
      • 1...g5!
    • 1.Qd4?
      • threat
        • 2.Qxg7#
      • 1...Kh8
        • 2.Qxg7#
      • 1...g6
        • 2.Qa7#
        • 2.Qg7#
        • 2.Qh8#
      • 1...g5
        • 2.Qg7#
      • 1...Kg6!
  • Keys
    • 1.Qh3!
      • 1...Kg6
        • 2.Qf5#
      • 1...Kh8
        • 2.Qxh6#
      • 1...h5
        • 2.Qxh5#
      • 1...g6
        • 2.Qd7#
      • 1...g5
        • 2.Qf5#

Anticipated by 80033(1961)

This anticipates 30238(1983), 99076(1990), 159218(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(b);OGATEB::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b)::QAB1(B),XP(b)
        • P(b);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b)::QAB1(B),XP(b)
        • P(b);::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(B);P_PINP(a)
    • Vars
      • K(c);N_SPINP(a),S_FLIGHT::QAB1(B)
      • K(c);P-FLIGHT::QAR2(B),XP(a)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(b);OGATEB,SBLOCK::QAR(B)
      • P(b);N_GUARD::QAB(B)
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