MESON Chess Problem Database

Problem Display
PID: 12419 (8/8/8/8/1N6/1b6/1R1n4/k1K5 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1979

8/8/8/8/1N6/1b6/1R1n4/k1K5

#2

3 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Ra2#
    • 1...Ba2
      • 2.Sc2#
      • 2.Rxa2#
    • 1...Bc2
      • 2.Sxc2#
      • 2.Ra2#
    • 1...Ba4
      • 2.Ra2#
    • 1...Bc4
      • 2.Sc2#
    • 1...Bd5
      • 2.Sc2#
    • 1...Be6
      • 2.Sc2#
    • 1...Bf7
      • 2.Sc2#
    • 1...Bg8
      • 2.Sc2#
    • 1...Sb1
      • 2.Rxb1#
    • 1...Sf1
      • 2.Rb1#
    • 1...Sf3
      • 2.Rb1#
    • 1...Sc4
      • 2.Rb1#
    • 1...Se4
      • 2.Rb1#
  • Tries
    • 1.Rxb3?
      • threat
        • 2.Ra3#
      • 1...Sb1
        • 2.Rxb1#
      • 1...Sc4
        • 2.Rb1#
      • 1...Sxb3+!
  • Keys
    • 1.Ra2+!
      • 1...Bxa2
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • B(c);N_GUARD::R1(B)
    • B(c);N_GUARD::S(C)
    • S(b);N_GUARD::R1(B),XS(b)
    • S(b);N_GUARD::R1(B)
  • Tries
    • Try
      • R(B);XB(c)
      • Threat
        • R(B)
      • Vars
        • S(b);N_GUARD::R1(B),XS(b)
        • S(b);N_GUARD::R1(B)
      • Refutation
        • S(b);CHECK,XR(B)
  • Actual
    • R(B);CHECK
    • Vars
      • B(c);SBLOCK,XR(B)::S(C)
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