MESON Chess Problem Database

Problem Display
PID: 70767 (5R1K/B2NN2b/3R4/4p3/4k3/8/2n1P2b/4r3 w - - 0 1)

Kisis, Imants J

4/5 Prize, Shakhmaty v SSSR, 1977

5R1K/B2NN2b/3R4/4p3/4k3/8/2n1P2b/4r3

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Sf6#
    • 1...Se3
      • 2.Sc5#
  • Tries
    • 1.Rf3?
      • threat
        • 2.Sc5#
        • 2.Sf6#
      • 1...Bg1
        • 2.Sf6#
      • 1...Rxe2!
    • 1.Rf4+?
      • 1...Bxf4
        • 2.Sf6#
      • 1...exf4
        • 2.Re6#
      • 1...Kxf4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc3#
      • 1...Bf5
        • 2.S7f6#
      • 1...Sd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(c);SBLOCK::S(D)
    • S(b);SBLOCK::S(D)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::S(D)
      • Refutation
        • R(a);XP(A)
    • Try
      • R(F);CHECK
      • Vars
        • B(c);SBLOCK,XR(F)::S(D)
        • P(e);SBLOCK,S_CUTB(c),XR(F)::R(B)
      • Refutation
        • K(d);P-FLIGHT,XR(F)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • B(f);SBLOCK::S(D)
      • S(b);SBLOCK::S(D)
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