MESON Chess Problem Database

Problem Display
PID: 201694 (4N3/8/2N2Q2/3k4/P5K1/8/8/8 w - - 0 1)

Schottmuller, Fritz

Deutsches Wochenschach, 1922

4N3/8/2N2Q2/3k4/P5K1/8/8/8

#2

5 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qd4#
      • 2.Qf3#
  • Tries
    • 1.Sa5?
      • 1...Kc5
        • 2.Qd6#
      • 1...Ke4!
    • 1.Qc3?
      • 1...Ke4
        • 2.Sf6#
        • 2.Qd4#
        • 2.Qf3#
      • 1...Ke6!
    • 1.Qe5+?
      • 1...Kxc6
        • 2.Qb5#
      • 1...Kc4!
    • 1.Qf5+?
      • 1...Kxc6
        • 2.Qb5#
      • 1...Kc4!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Kc4!
  • Keys
    • 1.Qf1!
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kxc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qf5#

This anticipates 223479(1926), 45874(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);S_FLIGHT,XS(C)::QAB1(D)
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