MESON Chess Problem Database

Problem Display
PID: 180493 (4N2k/5K2/6P1/7N/3b4/1R6/8/8 w - - 0 1)

Lider, Valentin Viktorovich

Shakhmatnaya Moskva, 1969

4N2k/5K2/6P1/7N/3b4/1R6/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Shf6?
      • threat
        • 2.Rh3#
        • 2.g7#
      • 1...Bf2
        • 2.g7#
      • 1...Bc3
        • 2.g7#
      • 1...Be3
        • 2.g7#
      • 1...Bxf6!
    • 1.Sef6?
      • threat
        • 2.Rb8#
        • 2.g7#
      • 1...Bc5
        • 2.g7#
      • 1...Be5
        • 2.g7#
      • 1...Bb6
        • 2.g7#
      • 1...Ba7
        • 2.g7#
      • 1...Bxf6!
    • 1.Rb8?
      • threat
        • 2.Sd6#
        • 2.Sef6#
        • 2.Sc7#
        • 2.Seg7#
      • 1...Bc5
        • 2.Sd6#
      • 1...Be5
        • 2.Sd6#
        • 2.Sc7#
      • 1...Bb6
        • 2.Sc7#
      • 1...Bf6
        • 2.Sexf6#
      • 1...Bg7
        • 2.Sexg7#
      • 1...Ba7!
  • Keys
    • 1.Rh3!
      • threat
        • 2.Sg3#
        • 2.Sf4#
        • 2.Shf6#
        • 2.Shg7#
      • 1...Bf2
        • 2.Sg3#
      • 1...Be3
        • 2.Sf4#
      • 1...Bf6
        • 2.Shxf6#
      • 1...Bg7
        • 2.Shxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::P(C)
      • Refutation
        • B(a);XS(B)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::P(C)
      • Refutation
        • B(a);XS(E)
    • Try
      • R(A);
      • Threat
        • DUALS(4)
      • Vars
        • B(a);::R(A)+S(E)
        • B(a);::R(A)+S(E),XB(a)
      • Refutation
        • B(a);
  • Actual
    • R(A);
    • Threat
      • DUALS(4)
    • Vars
      • B(a);::R(A)+S(B)
      • B(a);::R(A)+S(B),XB(a)
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