MESON Chess Problem Database

Problem Display
PID: 223164 (1K6/5B2/8/2Qpk1B1/4b3/8/4P3/8 w - - 0 1)

Strohmeier, WA

Philadelphia Times, 1886

1K6/5B2/8/2Qpk1B1/4b3/8/4P3/8

#2

5 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxd5#
    • 1...Bc2
      • 2.Qxd5#
    • 1...Bd3
      • 2.Qxd5#
    • 1...Bf5
      • 2.Qxd5#
    • 1...Bg6
      • 2.Qxd5#
    • 1...Bh7
      • 2.Qxd5#
  • Tries
    • 1.Qe3?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qf4#
      • 1...Kd6!
    • 1.Qc7+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd4!
  • Keys
    • 1.Qc1!
      • 1...Kd4
        • 2.Bf6#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd6
        • 2.Qc7#
      • 1...Bb1
        • 2.Qf4#
      • 1...Bh1
        • 2.Qf4#
      • 1...Bc2
        • 2.Qf4#
      • 1...Bg2
        • 2.Qf4#
      • 1...Bd3
        • 2.Qf4#
      • 1...Bf3
        • 2.Qf4#
      • 1...Bg6
        • 2.Qf4#
      • 1...Bh7
        • 2.Qf4#
      • 1...Bf5
        • 2.Qf4#
      • 1...d4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 6
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR1(B),XP(b)
    • B(a);N_GUARD,SBLOCK::QAR1(B),XP(b)
  • Tries
    • Try
      • Q(B);N_PINP(b),P_PINB(a)
      • Vars
        • K(c);N_SPINB(a),P-FLIGHT::QAR1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(c);N_SPINB(a),S_FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(b)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(B);N_PINP(b)
    • Vars
      • K(c);S_FLIGHT::B(C)
      • K(c);P-FLIGHT::QAR1(B)
      • K(c);S_FLIGHT::QAB1(B)
      • B(a);::QAB1(B)
      • P(b);SBLOCK::QAB1(B)
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