MESON Chess Problem Database

Problem Display
PID: 157075 (bK1B4/3p2p1/2k5/8/3PP3/3P4/4Q3/7B w - - 0 1)

Ackerman, Ernest

Source?, 1973

bK1B4/3p2p1/2k5/8/3PP3/3P4/4Q3/7B

#2

7 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Qh5?
      • threat
        • 2.Qc5#
        • 2.Qd5#
      • 1...Kd6
        • 2.Qg6#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qe8#
      • 1...g5!
    • 1.Qc2+?
      • 1...Kb5
        • 2.Qc4#
      • 1...Kd6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qd5#
        • 2.Qa6#
      • 1...Kb5
        • 2.Qc4#
      • 1...Kd6
        • 2.e5#
      • 1...d5
        • 2.Qxd5#
      • 1...Bb7
        • 2.Qd5#
      • 1...d6
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • P(b);::QAB1(B),XP(b)
        • P(b);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::P(E)
      • P(b);::QAB1(B),XP(b)
      • B(d);::QAB1(B)
      • P(b);SBLOCK::QAB(B)
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