MESON Chess Problem Database

Problem Display
PID: 88248 (6b1/2R5/3pk3/4p3/6K1/8/8/7Q w - - 0 1)

de Blasio, Francis JC

American Chess Problemist, 1950

6b1/2R5/3pk3/4p3/6K1/8/8/7Q

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qh6#
    • 1...d5
      • 2.Qh6#
  • Tries
    • 1.Qf3?
      • 1...e4
        • 2.Qf5#
      • 1...Bf7
        • 2.Qxf7#
      • 1...Bh7
        • 2.Qf7#
      • 1...d5!
    • 1.Qh5?
      • 1...Kf6
        • 2.Qf5#
        • 2.Qh6#
      • 1...Bf7
        • 2.Qxf7#
      • 1...Bh7
        • 2.Qf7#
      • 1...e4
        • 2.Qf5#
      • 1...d5
        • 2.Qg6#
        • 2.Qh6#
      • 1...Kd5!
  • Keys
    • 1.Qf1!
      • 1...Kd5
        • 2.Qc4#
      • 1...e4
        • 2.Qf5#
      • 1...Bf7
        • 2.Qxf7#
      • 1...Bh7
        • 2.Qf7#
      • 1...d5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
    • P(b);SBLOCK::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(a);::QAB1(A)
        • B(d);N_GUARD::QAB1(A),XB(d)
        • B(d);N_GUARD::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • B(d);N_GUARD::QAB1(A),XB(d)
        • B(d);N_GUARD::QAB1(A)
        • P(a);::QAB1(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::QAB1(A)
      • P(a);::QAB1(A)
      • B(d);N_GUARD::QAB1(A),XB(d)
      • B(d);N_GUARD::QAB1(A)
      • P(b);OGATEB,SBLOCK::QAR(A)
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