MESON Chess Problem Database

Problem Display
PID: 178121 (2K5/8/8/3kN1p1/4N1P1/8/PQ4P1/8 w - - 0 1)

Stabenov, Albert

Der Reichsbote, 1900

2K5/8/8/3kN1p1/4N1P1/8/PQ4P1/8

#2

7 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qd4#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Kxd4!
    • 1.Qb4?
      • 1...Ke6
        • 2.Qd6#
      • 1...Kxe5!
  • Keys
    • 1.Sc6!
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qd4#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qb3#

Anticipated by 165386(1891), 143280(1893)

This anticipates 95240(1911)

FEATURES

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