MESON Chess Problem Database

Problem Display
PID: 198650 (k1N4K/1bP5/8/8/8/8/r7/6Q1 w - - 0 1)

Massmann, Wilhelm Karl Heinrich

Essener Anzeiger, 1921

k1N4K/1bP5/8/8/8/8/r7/6Q1

#2

4 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Qa7#
    • 1...Rc2
      • 2.Qa7#
    • 1...Rd2
      • 2.Qa7#
    • 1...Re2
      • 2.Qa7#
    • 1...Rg2
      • 2.Qa7#
    • 1...Ra7
      • 2.Sb6#
      • 2.Qxa7#
    • 1...Ba6
      • 2.Qa7#
  • Keys
    • 1.Qa7+!
      • 1...Rxa7
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::QAR1(A)
    • B(b);S_CUTR(a)::QAR1(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • R(a);SBLOCK,XQ(A)::S(C)
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