MESON Chess Problem Database

Problem Display
PID: 171249 (K5R1/4bN2/R4pn1/5k2/4rN2/5BB1/8/8 w - - 0 1)

Archakov, Vladimir Mikhailovich

Lobsenko, Viacheslav

Die Schwalbe, 1972

K5R1/4bN2/R4pn1/5k2/4rN2/5BB1/8/8

#2

7 + 5

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf4
      • 2.Bg4#
    • 1...Sh4
      • 2.Bg4#
    • 1...Se5
      • 2.Sh6#
    • 1...Sf8
      • 2.Bg4#
    • 1...Sh8
      • 2.Bg4#
  • Tries
    • 1.Sh6+?
      • 1...Kg5
        • 2.Rxg6#
      • 1...Ke5!
    • 1.Bxe4+?
      • 1...Kg4
        • 2.Rxg6#
      • 1...Kxe4!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Sg7#
      • 1...Bf8
        • 2.Rxf6#
      • 1...Sf4
        • 2.Bg4#
      • 1...Sh4
        • 2.Sh6#
      • 1...Se5
        • 2.Sh6#
      • 1...Sf8
        • 2.Sh6#
      • 1...Sh8
        • 2.Sh6#

Anticipated by 24316(1950)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(d);XS(C)::B(A)
    • S(d);::B(A)
    • S(d);SBLOCK::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(d)::R1(G),XS(d)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(A);CHECK,XR(a)
      • Vars
        • K(b);P_SPINS(d),S_FLIGHT::R(G),XS(d)
      • Refutation
        • K(b);S_FLIGHT,XB(A)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • B(e);N_GUARD::R1(D),XP(c)
      • S(d);S_CUTR(a)::B(A)
      • S(d);::S(E)
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