MESON Chess Problem Database

Problem Display
PID: 187541 (8/1Bp5/2R1R3/bN1k2K1/8/2pn4/8/8 w - - 0 1)

Salmio, Seppo

Suomen Shakki, 1982

8/1Bp5/2R1R3/bN1k2K1/8/2pn4/8/8

#2

5 + 5

5454 Near Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Kf5?
      • threat
        • 2.Rxc7#
      • 1...Sb4
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sc5!
    • 1.Kf6?
      • threat
        • 2.Rxc7#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sb4
        • 2.Re5#
      • 1...Sc5!
    • 1.Sxc3+?
      • 1...Kd4
        • 2.Re4#
      • 1...Bxc3!
  • Keys
    • 1.Re4!
      • threat
        • 2.Rxc7#
      • 1...Kxe4
        • 2.Re6#
      • 1...Sb4
        • 2.Sxc3#
      • 1...Sc5
        • 2.Rd6#
      • 1...Se5
        • 2.Rd4#

Anticipated by 9434(1903)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • B(E)+R(C),XP(e)
      • Vars
        • S(b);N_GUARD::R1(D)
        • S(b);N_GUARD::R1(D),XS(b)
      • Refutation
        • S(b);
    • Try
      • K(B);S_FLIGHT
      • Threat
        • B(E)+R(C),XP(e)
      • Vars
        • S(b);N_GUARD::R1(D),XS(b)
        • S(b);N_GUARD::R1(D)
      • Refutation
        • S(b);
    • Try
      • S(A);CHECK,XP(a)
      • Vars
        • K(d);P-FLIGHT::R1(D)
      • Refutation
        • B(c);XS(A)
  • Actual
    • R(D);
    • Threat
      • B(E)+R(C),XP(e)
    • Vars
      • K(d);S_FLIGHT,XR(D)::B(E)+R(C),DCHECK
      • S(b);S_CUTB(c)::S(A),XP(a)
      • S(b);SBLOCK::B(E)+R(C),DCHECK
      • S(b);SBLOCK::R1(D)
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