MESON Chess Problem Database

Problem Display
PID: 131908 (8/3Bp3/R3N3/3k1p2/2r1NB2/1Pp5/2K5/8 w - - 0 1)

Husik, Karel

Ruch, 1947

8/3Bp3/R3N3/3k1p2/2r1NB2/1Pp5/2K5/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sxc3#
    • 1...Rb4
      • 2.Sxc3#
    • 1...Rd4
      • 2.Sxc3#
    • 1...Rxe4
      • 2.Ra5#
  • Tries
    • 1.Ra5+?
      • 1...Rc5
        • 2.Sxc3#
      • 1...Kxe4!
    • 1.Rd6+?
      • 1...exd6
        • 2.Sf6#
      • 1...Kxe4!
    • 1.bxc4+?
      • 1...Kxe4
        • 2.Bc6#
      • 1...Kxc4!
  • Keys
    • 1.Ra4!
      • 1...Kxe4
        • 2.Bc6#
      • 1...Rxa4
        • 2.Sxc3#
      • 1...Rxe4
        • 2.Ra5#
      • 1...fxe4
        • 2.bxc4#
      • 1...Rb4
        • 2.Sxc3#
      • 1...Rd4
        • 2.Sxc3#
        • 2.Rxd4#
      • 1...Rc5
        • 2.Rd4#
      • 1...Rc6
        • 2.Rd4#
      • 1...Rc7
        • 2.Sxc7#
        • 2.Rd4#
      • 1...Rc8
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::S(C),XP(a)
    • R(b);N_GUARD,SBLOCK,XS(C)::R(E)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • R(b);P_SPINR(b)::S(C),XP(a)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • R(E);CHECK
      • Vars
        • P(e);XR(E)::S(C)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • P(B);CHECK,XR(b)
      • Vars
        • K(c);S_FLIGHT,XS(C)::B(G)
      • Refutation
        • K(c);S_FLIGHT,XP(B)
  • Actual
    • R(E);
    • Vars
      • K(c);P_SPINR(b),S_FLIGHT,XS(C)::B(G)
      • R(b);N_GUARD,XR(E)::S(C),XP(a)
      • R(b);N_GUARD,SBLOCK,XS(C)::R(E)
      • P(d);SBLOCK,XS(C)::P(B),XR(b)
      • R(b);N_GUARD::S(C),XP(a)
      • R(b);OGATE::R1(E)
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