MESON Chess Problem Database

Problem Display
PID: 152225 (8/8/8/B4R2/2K5/8/3pkpN1/Q7 w - - 0 1)

Albert, Bernard

Good Companions (May), 1914

8/8/8/B4R2/2K5/8/3pkpN1/Q7

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...f1Q
      • 2.Qxf1#
    • 1...f1S
      • 2.Qxf1#
    • 1...f1B
      • 2.Qxf1#
    • 1...f1R
      • 2.Qxf1#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Rxf2#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Rf2#
        • 2.Qxf1#
      • 1...f1B
        • 2.Rf2#
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...d1S!
  • Keys
    • 1.Qd4!
      • 1...Kd1
        • 2.Qxd2#
      • 1...Kf1
        • 2.Qxf2#
      • 1...d1Q
        • 2.Rxf2#
        • 2.Qxf2#
      • 1...d1S
        • 2.Qd3#
      • 1...d1B
        • 2.Rxf2#
        • 2.Qxf2#
        • 2.Qd3#
      • 1...d1R
        • 2.Rxf2#
        • 2.Qxf2#
      • 1...f1Q
        • 2.Qxd2#
      • 1...f1S
        • 2.Qg4#
      • 1...f1B
        • 2.Qxd2#
        • 2.Qg4#
      • 1...f1R
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);::QAB1(A),XQ(c)
    • P(c);::QAB1(A),XS(c)
    • P(c);::QAB1(A),XB(c)
    • P(c);::QAB1(A),XR(c)
  • Tries
    • Try
      • B(D);
      • Threat
        • R1(E),XP(c)
      • Vars
        • P(c);::QAB1(A),XQ(c)
        • P(c);::QAB1(A),XR(c)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
      • K(b);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
      • P(a);::QAB1(A)
      • P(c);::QAR1(A),XP(a)
      • P(c);::QAB(A)
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Developed and maintained by Brian Stephenson.
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