MESON Chess Problem Database

Problem Display
PID: 218475 (6rk/6pp/6q1/6N1/7Q/8/8/6K1 w - - 0 1)

Anonymous

Philadelphia Times, 1882

(First published on Sun Dec 24 1882)

6rk/6pp/6q1/6N1/7Q/8/8/6K1

#2

3 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sf7#
    • 1...Qd3
      • 2.Sf7#
    • 1...Qe4
      • 2.Sf7#
    • 1...Qf7
      • 2.Sxf7#
      • 2.Qxh7#
    • 1...Qe8
      • 2.Qxh7#
    • 1...Qa6
      • 2.Sf7#
      • 2.Qxh7#
    • 1...Qc6
      • 2.Sf7#
      • 2.Qxh7#
    • 1...Qd6
      • 2.Sf7#
      • 2.Qxh7#
    • 1...Qe6
      • 2.Qxh7#
    • 1...Qf6
      • 2.Qxh7#
    • 1...Qh6
      • 2.Sf7#
  • Keys
    • 1.Qxh7+!
      • 1...Qxh7
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_PINS(C)::S(C)
    • Q(a);N_GUARD,N_PINS(C)::QAR1(B),XP(c)
    • Q(a);N_PINS(C),N_SPINP(c)::S(C)
  • Actual
    • Q(B);CHECK,XP(c)
    • Vars
      • Q(a);N_PINS(C),SBLOCK,XQ(B)::S(C)
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