MESON Chess Problem Database

Problem Display
PID: 141426 (8/3N1Q2/Pp2n3/1Npk4/6p1/K5P1/4P3/8 w - - 0 1)

von Gottschall, Hermann

Source?, 1891

8/3N1Q2/Pp2n3/1Npk4/6p1/K5P1/4P3/8

#2

7 + 5

5454 Near Snap 2011
14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxe6#
  • Tries
    • 1.Ka4?
      • 1...Kc4
        • 2.Sxb6#
        • 2.Qxe6#
      • 1...Ke4
        • 2.Qxe6#
      • 1...Kc6
        • 2.Qxe6#
      • 1...c4!
    • 1.Qf3+?
      • 1...Kc4
        • 2.Qb3#
        • 2.Qd3#
      • 1...gxf3!
    • 1.Qf5+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kc6!
  • Keys
    • 1.Qe8!
      • 1...Kc4
        • 2.Sxb6#
      • 1...Ke4
        • 2.Qxe6#
      • 1...Kc6
        • 2.Sf6#
      • 1...c4
        • 2.Qa8#
      • 1...Sd4
        • 2.Sxb6#
      • 1...Sf4
        • 2.Sxb6#
      • 1...Sg5
        • 2.Sxb6#
      • 1...Sc7
        • 2.Sxb6#
      • 1...Sg7
        • 2.Sxb6#
      • 1...Sd8
        • 2.Sxb6#
      • 1...Sf8
        • 2.Sxb6#

This anticipates 69443(1898)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(e),S_FLIGHT::QAR2(G),XS(e)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);N_SPINS(e),S_FLIGHT::QAR2(G),XS(e)
      • Refutation
        • P(b);
    • Try
      • Q(G);CHECK,N_PINS(e)
      • Refutation
        • P(a);XQ(G)
    • Try
      • Q(G);CHECK,N_PINS(e)
      • Vars
        • K(c);S_FLIGHT::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(G);N_PINS(e)
    • Vars
      • K(c);S_FLIGHT::S(F),XP(d)
      • K(c);P_SPINS(e),S_FLIGHT::QAR2(G),XS(e)
      • K(c);S_FLIGHT::QAB(G)+S(F)
      • P(b);SBLOCK::QAB(G)
      • S(e);::S(F),XP(d)
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