MESON Chess Problem Database

Problem Display
PID: 176153 (8/8/8/8/Q7/P5K1/3kN3/4N3 w - - 0 1)

Mottet, Philipp

Schach-Echo, 1953

8/8/8/8/Q7/P5K1/3kN3/4N3

#2

5 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sc1?
      • 1...Kxc1
        • 2.Qc2#
      • 1...Kc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kxe1!
    • 1.Sg1?
      • 1...Kc1
        • 2.Qc2#
      • 1...Kc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kxe1!
    • 1.Qd1+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxd1!
    • 1.Qc2+?
      • 1...Ke3
        • 2.Sg2#
        • 2.Qd3#
      • 1...Kxe1!
  • Keys
    • 1.Sc3!
      • 1...Kc1
        • 2.Qc2#
      • 1...Kxe1
        • 2.Qd1#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Qf4#

Anticipated by 4734(1889), 5043(1898), 201345(1922), 79523(1940), 16695(1942)

This anticipates 110513(1955), 176168(1959), 79229(1990), 7995(1995), 103493(1996), 163136(2013)

FEATURES

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