MESON Chess Problem Database

Problem Display
PID: 77504 (kr5R/N1p5/K7/8/8/8/8/8 w - - 0 1)

Cyrulik, Stepan Pavlovich

Problemist Pribuzhya, 1992

kr5R/N1p5/K7/8/8/8/8/8

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.Rxc8#
    • 1...Rd8
      • 2.Rxd8#
    • 1...Re8
      • 2.Rxe8#
    • 1...Rf8
      • 2.Rxf8#
    • 1...Rg8
      • 2.Rxg8#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sxc7#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rd8
        • 2.Rxd8#
      • 1...Re8
        • 2.Rxe8#
      • 1...Rf8
        • 2.Rxf8#
      • 1...Rg8
        • 2.Rxg8#
      • 1...c5
        • 2.Sc7#
      • 1...c6
        • 2.Sc7#
      • 1...Rxh8!
    • 1.Sc6?
      • threat
        • 2.Rxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rd8
        • 2.Rxd8#
      • 1...Re8
        • 2.Rxe8#
      • 1...Rf8
        • 2.Rxf8#
      • 1...Rg8
        • 2.Rxg8#
      • 1...Rxh8!
  • Keys
    • 1.Sc8!
      • 1...Rb6+
        • 2.Sxb6#
      • 1...Rxc8
        • 2.Rxc8#
      • 1...Rb1
        • 2.Sb6#
      • 1...Rb2
        • 2.Sb6#
      • 1...Rb3
        • 2.Sb6#
      • 1...Rb4
        • 2.Sb6#
      • 1...Rb5
        • 2.Sb6#
      • 1...Rb7
        • 2.Sb6#
      • 1...c5
        • 2.Sb6#
      • 1...c6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • R(c);OGATEB::R(C),XR(c)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B),XP(a)
      • Vars
        • R(c);OGATEB::R(C),XR(c)
        • P(a);::S(B)
      • Refutation
        • R(c);N_SPINR(c),XR(C)
    • Try
      • S(B);
      • Threat
        • R1(C),XR(c)
      • Vars
        • R(c);OGATEB::R(C),XR(c)
      • Refutation
        • R(c);N_SPINR(c),XR(C)
  • Actual
    • S(B);N_PINR(c)
    • Vars
      • R(c);CHECK::R(C)+S(B),DCHECK,XR(c)
      • R(c);OGATE,P_SPINR(c),XS(B)::R(C),XR(c)
      • R(c);::R(C)+S(B),DCHECK
      • P(a);N_GUARD::S(B)
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