MESON Chess Problem Database

Problem Display
PID: 170483 (8/5Q2/1R6/3NN3/3k4/8/8/4K3 w - - 0 1)

Sutter, Alfred Ernst

Basler Nachrichten, 1958

8/5Q2/1R6/3NN3/3k4/8/8/4K3

#2

5 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rb5?
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxe5!
    • 1.Rd6?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Kc5!
    • 1.Qe6?
      • 1...Ke4
        • 2.Rb4#
      • 1...Kc5!
    • 1.Qf4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kxd5!
  • Keys
    • 1.Sc3!
      • 1...Kxc3
        • 2.Qc4#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kc5
        • 2.Qf2#
      • 1...Kxe5
        • 2.Qf6#

Anticipated by 24204(1884), 165386(1891)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Threat
        • QAR2(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
        • K(a);S_FLIGHT,XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT,XS(B)::QAR1(E)
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAB(E)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
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