MESON Chess Problem Database

Problem Display
PID: 161685 (3rk1K1/3p4/4P3/R7/7B/8/8/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakhmatnie Zadachi Tabri, 1987

3rk1K1/3p4/4P3/R7/7B/8/8/8

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Rxa8#
  • Tries
    • 1.Rd5?
      • 1...dxe6
        • 2.Rxd8#
      • 1...Rb8
        • 2.exd7#
      • 1...Ra8
        • 2.exd7#
      • 1...Rc8
        • 2.exd7#
      • 1...d6!
    • 1.Ra8?
      • threat
        • 2.Rxd8#
      • 1...Rb8
        • 2.Rxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rxa8!
  • Keys
    • 1.Ra7!
      • 1...dxe6
        • 2.Re7#
      • 1...Rb8
        • 2.exd7#
      • 1...Ra8
        • 2.Rxa8#
        • 2.exd7#
      • 1...Rc8
        • 2.exd7#
      • 1...d5
        • 2.Re7#
      • 1...d6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATEB::R(B),XR(b)
  • Tries
    • Try
      • R(B);
      • Vars
        • P(a);OGATE,XP(C)::R1(B),XR(b)
        • R(b);N_GUARD::P(C),XP(a)
      • Refutation
        • P(a);
    • Try
      • R(B);P_PINR(b)
      • Threat
        • R1(B),XR(b)
      • Vars
        • R(b);OGATEB::R(B),XR(b)
      • Refutation
        • R(b);N_SPINR(b),XR(B)
  • Actual
    • R(B);
    • Vars
      • P(a);OGATE,XP(C)::R1(B)
      • R(b);N_GUARD::P(C),XP(a)
      • P(a);OGATE::R1(B)
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