MESON Chess Problem Database

Problem Display
PID: 216216 (7Q/R7/1K3P2/2pp4/2k5/8/N7/4N3 w - - 0 1)

Kauders, Dr Albert

Sammlung Leichterer Schachaufgaben 2 (Dufresne), 1882

7Q/R7/1K3P2/2pp4/2k5/8/N7/4N3

#2

6 + 3

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qg8#
  • Tries
    • 1.Ra3?
      • 1...d4
        • 2.Qg8#
      • 1...Kd4!
    • 1.Re7?
      • 1...Kd4
        • 2.Qh4#
      • 1...d4
        • 2.Qg8#
      • 1...Kb3!
    • 1.Qh2?
      • 1...Kb3
        • 2.Qc2#
      • 1...Kd4
        • 2.Qf4#
      • 1...d4!
    • 1.Qh3?
      • threat
        • 2.Ra4#
        • 2.Qc3#
        • 2.Qd3#
      • 1...d4
        • 2.Qe6#
      • 1...Kd4!
    • 1.Qh7?
      • threat
        • 2.Qd3#
      • 1...Kb3
        • 2.Qc2#
      • 1...d4
        • 2.Qg8#
        • 2.Qf7#
      • 1...Kd4!
    • 1.Qe8?
      • threat
        • 2.Qa4#
      • 1...Kb3
        • 2.Qb5#
      • 1...d4
        • 2.Qf7#
        • 2.Qe6#
        • 2.Qg8#
      • 1...Kd4!
    • 1.f7?
      • threat
        • 2.Qc3#
      • 1...Kb3
        • 2.Qc3#
      • 1...d4!
  • Keys
    • 1.Qb8!
      • 1...Kb3
        • 2.Kxc5#
      • 1...Kd4
        • 2.Qf4#
      • 1...d4
        • 2.Qg8#

This anticipates 56682(1923)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAB(F)
  • Tries
    • Try
      • R(E);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);P-FLIGHT::QAR(F)
        • P(c);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(D);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • P(c);
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAR(F)+K(C),XP(b)
      • K(a);P-FLIGHT::QAR2(F)
      • P(c);OGATEB,SBLOCK::QAB(F)
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