MESON Chess Problem Database

Problem Display
PID: 193481 (8/8/4K2B/1B6/3k4/8/R5P1/8 w - - 0 1)

Gundersen, Gunnar

Australasian (The), 1915

8/8/4K2B/1B6/3k4/8/R5P1/8

#2

5 + 1

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Ra4#
  • Tries
    • 1.Bd2?
      • 1...Ke4
        • 2.Ra4#
      • 1...Kc5!
    • 1.Ra3?
      • 1...Ke4
        • 2.Ra4#
      • 1...Kc5!
  • Keys
    • 1.Rb2!
      • 1...Kc3
        • 2.Bg7#
      • 1...Ke4
        • 2.Rb4#
      • 1...Kc5
        • 2.Be3#

Anticipated by 1953(1859), 4775(1891), 234958(1894), 120937(1898), 57017(1900), 31183(1902), 175166(1902), 181896(1905), 50715(1907), 184830(1908), 189845(1912), 178324(1915)

This anticipates 75889(1920), 206553(1925), 206593(1925), 231389(1927), 76533(1933), 76553(1936), 101951(1939), 19270(1943), 76843(1947), 51132(1950), 184308(1950), 51583(1965), 213018(1967), 121122(1980), 240454(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::R(A)
  • Tries
    • Try
      • B(E);
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(a);S_FLIGHT::B(E)
      • K(a);P-FLIGHT::R(A)
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