MESON Chess Problem Database

Problem Display
PID: 183076 (k7/pp1N4/3R4/K7/4B1n1/8/8/8 w - - 0 1)

Akimov, Nikolai Nikolaevich

Kudesnik, 2017

k7/pp1N4/3R4/K7/4B1n1/8/8/8

#2

4 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...a6
      • 2.Rxa6#
  • Tries
    • 1.Rb6?
      • threat
        • 2.Bxb7#
      • 1...a6
        • 2.Rxa6#
      • 1...axb6+!
    • 1.Re6?
      • threat
        • 2.Re8#
      • 1...a6
        • 2.Rxa6#
      • 1...Sf6!
    • 1.Rf6?
      • threat
        • 2.Rf8#
      • 1...a6
        • 2.Rxa6#
      • 1...Sxf6!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rc8#
      • 1...b6+
        • 2.Rxb6#
      • 1...bxc6
        • 2.Bxc6#
      • 1...a6
        • 2.Rxa6#

Anticipated by 46400(2003)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::R(C),XP(b)
  • Tries
    • Try
      • R(C);
      • Threat
        • B(A),XP(c)
      • Vars
        • P(b);OGATEB::R(C),XP(b)
      • Refutation
        • P(b);CHECK,XR(C)
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • P(b);OGATEB::R(C),XP(b)
      • Refutation
        • S(a);
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • P(b);OGATEB::R(C),XP(b)
      • Refutation
        • S(a);XR(C)
  • Actual
    • R(C);N_PINP(c)
    • Threat
      • R(C)
    • Vars
      • P(c);CHECK,OGATEB::B(A)+R(C),XP(c)
      • P(c);OGATE,P_SPINP(c),XR(C)::B(A),XP(c)
      • P(b);OGATEB::R(C),XP(b)
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