MESON Chess Problem Database

Problem Display
PID: 222937 (7b/5pk1/7N/7R/5P2/B7/8/KQ6 w - - 0 1)

Nemo, Ottmar (Weiss, Ottmar)

La Strategie, 1885

7b/5pk1/7N/7R/5P2/B7/8/KQ6

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bf8+?
      • 1...Kf6
        • 2.Qf5#
        • 2.Qb6#
      • 1...Kxf8+!
    • 1.Rg5+?
      • 1...Kf6
        • 2.Qf5#
        • 2.Qb6#
      • 1...Kxh6+!
    • 1.Qh7+?
      • 1...Kf6
        • 2.Qxf7#
      • 1...Kxh7+!
  • Keys
    • 1.f5!
      • 1...Kh7+
        • 2.f6#
      • 1...Kf6
        • 2.Qb2#
      • 1...f6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • K(b);CHECK,S_FLIGHT,XB(C)
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);CHECK,S_FLIGHT,XS(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B),XP(a)
      • Refutation
        • K(b);CHECK,P-FLIGHT,XQ(B)
  • Actual
    • P(D);
    • Vars
      • K(b);CHECK,P-FLIGHT::QAB(B)+P(D)
      • K(b);S_FLIGHT::QAB(B)
      • P(a);OGATEB,SBLOCK::QAR(B)
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