MESON Chess Problem Database

Problem Display
PID: 206903 (8/kPK5/2B5/pq6/8/N7/1P6/3r4 w - - 0 1)

Dollinger, Joseph

110 ganz neu zusammengestellte Schachendspiele, 1806

8/kPK5/2B5/pq6/8/N7/1P6/3r4

#2

5 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.b8Q#
      • 2.b8B#
  • Tries
    • 1.b8Q+?
      • 1...Ka6
        • 2.Bxb5#
        • 2.Qa8#
      • 1...Qxb8+!
    • 1.b8B+?
      • 1...Ka6
        • 2.Bxb5#
      • 1...Qxb8+!
  • Keys
    • 1.Sxb5+!
      • 1...Ka6
        • 2.b8S#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD,SBLOCK::P=Q
  • Tries
    • Try
      • P(D);CHECK
      • Refutation
        • Q(c);CHECK,XQ(D)
    • Try
      • P(D);CHECK
      • Vars
        • K(d);P-FLIGHT::B(C),XQ(c)
      • Refutation
        • Q(c);CHECK,XB(D)
  • Actual
    • S(B);CHECK,XQ(c)
    • Vars
      • K(d);P-FLIGHT::P=S
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