MESON Chess Problem Database

Problem Display
PID: 105561 (4B3/3N4/1p6/1k2P3/1P1p4/3N4/1K6/7Q w - - 0 1)

Nielsen, Vilhelm

La Strategie, 1878

4B3/3N4/1p6/1k2P3/1P1p4/3N4/1K6/7Q

#2

7 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.S7c5#
      • 2.Sxb6#
  • Tries
    • 1.Sf6+?
      • 1...Ka6
        • 2.Qa8#
      • 1...Kc4!
    • 1.Sf8+?
      • 1...Ka6
        • 2.Qa8#
      • 1...Kc4!
    • 1.Qf3?
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
      • 1...Kc4
        • 2.Sxb6#
      • 1...Ka6!
    • 1.Qe4?
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
      • 1...Kc4
        • 2.Sxb6#
      • 1...Ka6!
    • 1.Qd5+?
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
      • 1...Ka6!
    • 1.Qc6+?
      • 1...Ka6
        • 2.Qxb6#
      • 1...Kxc6!
    • 1.Qb7?
      • threat
        • 2.Sxb6#
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
        • 2.Qa6#
      • 1...Kc4!
    • 1.Qc1?
      • threat
        • 2.S7c5#
        • 2.Sb8#
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
      • 1...Ka6!
    • 1.Qh6?
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
      • 1...Ka6
        • 2.Qxb6#
      • 1...Kc4!
    • 1.e6?
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
      • 1...Kc4
        • 2.S7e5#
      • 1...Ka6!
  • Keys
    • 1.Qh7!
      • 1...Ka4
        • 2.S7c5#
        • 2.Sxb6#
      • 1...Kc4
        • 2.Sxb6#
      • 1...Ka6
        • 2.Sb8#
      • 1...Kc6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::S(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::S(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • B(G)+S(F),XP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(E);
      • Vars
        • K(b);S_FLIGHT::S(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::S(F),XP(c)
      • K(b);S_FLIGHT::S(F)
      • K(b);S_FLIGHT::B(G)+S(F)
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