MESON Chess Problem Database

Problem Display
PID: 48033 (2K3Qb/4P2r/4Nk2/8/8/5NB1/8/8 w - - 0 1)

Loyd, Sam

La Strategie, 1867

2K3Qb/4P2r/4Nk2/8/8/5NB1/8/8

#2

6 + 3

5206 Sam Loyd and His Chess Problems 1913
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Seg5?
      • 1...Kf5
        • 2.Qe6#
      • 1...Kxe7
        • 2.Qd8#
      • 1...Rg7
        • 2.Qe6#
      • 1...Bg7
        • 2.Qe6#
        • 2.Qf7#
      • 1...Rh1
        • 2.Qf7#
      • 1...Rh2
        • 2.Qf7#
      • 1...Rh3
        • 2.Qf7#
      • 1...Rh4
        • 2.Qf7#
      • 1...Rh5
        • 2.Qf7#
      • 1...Rh6
        • 2.Qf7#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Rxe7!
    • 1.Sd8?
      • threat
        • 2.Qg5#
      • 1...Kf5
        • 2.Qe6#
      • 1...Rg7
        • 2.Qe6#
      • 1...Bg7
        • 2.Qe6#
        • 2.Qf7#
      • 1...Rh5
        • 2.Qf7#
      • 1...Kxe7!
    • 1.e8S+?
      • 1...Ke7
        • 2.Bd6#
      • 1...Kf5!
  • Keys
    • 1.Sf4!
      • 1...Kf5
        • 2.Qe6#
        • 2.Qg6#
      • 1...Kxe7
        • 2.Sd5#
      • 1...Rxe7
        • 2.Qg6#
      • 1...Rh1
        • 2.Qf8#
      • 1...Rh2
        • 2.Qf8#
      • 1...Rh3
        • 2.Qf8#
      • 1...Rh4
        • 2.Qf8#
      • 1...Rh5
        • 2.Qf8#
      • 1...Rh6
        • 2.Qf8#
      • 1...Rf7
        • 2.Qg5#
      • 1...Rg7
        • 2.Qe6#
      • 1...Bg7
        • 2.Qe6#

Anticipated by 2490(1857)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAB1(F)
        • K(a);OGATEB,S_FLIGHT,XP(D)::QAB1(F)
        • R(b);SBLOCK::QAR1(F)
        • R(b);N_GUARD::QAR1(F)
        • R(b);N_GUARD::QAR1(F),XR(b)
      • Refutation
        • R(b);XP(D)
    • Try
      • S(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(a);P-FLIGHT::QAB1(F)
        • R(b);SBLOCK::QAR1(F)
        • R(b);N_GUARD::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • P(D);CHECK
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT,XP(D)::S(C)
      • R(b);SBLOCK,XP(D)::QAR1(F)
      • R(b);N_GUARD::QAR2(F)
      • R(b);SBLOCK::QAB1(F)
      • R(b);SBLOCK::QAR1(F)
      • B(c);SBLOCK::QAR1(F)
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