MESON Chess Problem Database

Problem Display
PID: 11627 (BB3R2/8/8/7p/6p1/5q1p/6kP/1KQ4b w - - 0 1)

Haring, Jacobus

Main-Post, 1970

BB3R2/8/8/7p/6p1/5q1p/6kP/1KQ4b

#2

6 + 6

6455 The Chessboard Adventures of Norman Macleod 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4+
      • 2.Bxe4#
    • 1...Qd5
      • 2.Bxd5#
      • 2.Qf1#
    • 1...Qc6
      • 2.Bxc6#
      • 2.Qf1#
    • 1...Qb7+
      • 2.Bxb7#
    • 1...Qxa8
      • 2.Qf1#
  • Tries
    • 1.Bxf3+?
      • 1...Kf2
        • 2.Bg3#
        • 2.Ba7#
      • 1...gxf3!
    • 1.Bg3?
      • 1...Qe4+
        • 2.Bxe4#
      • 1...Qb7+
        • 2.Bxb7#
      • 1...Qxa8
        • 2.Rf2#
        • 2.Qf1#
      • 1...Qd5
        • 2.Bxd5#
        • 2.Rf2#
        • 2.Qf1#
      • 1...Qc6
        • 2.Bxc6#
        • 2.Rf2#
        • 2.Qf1#
      • 1...h4!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Qg1#
      • 1...Qe4+
        • 2.Qc2#
      • 1...Qb7+
        • 2.Qb2#
      • 1...Kxh2
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(c);CHECK,OGATEB::B(D),XQ(c)
    • Q(c);N_SPINQ(c),XB(D)::QAB1(B)
  • Tries
    • Try
      • B(D);CHECK,XQ(c)
      • Refutation
        • P(e);XB(D)
    • Try
      • B(E);
      • Vars
        • Q(c);CHECK,OGATEB::B(D),XQ(c)
      • Refutation
        • P(f);
  • Actual
    • B(E);
    • Threat
      • QAR1(B)
    • Vars
      • Q(c);CHECK::QAR(B)
      • K(b);N_SPINQ(c),P-FLIGHT,XP(C)::QAB1(B)
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