MESON Chess Problem Database

Problem Display
PID: 4912 (2n5/2N1B1b1/6B1/N7/1P1k4/8/5PnQ/K7 w - - 0 1)

Jonsson, Hermann Leonard

1st Prize, Sporten, 1893

2n5/2N1B1b1/6B1/N7/1P1k4/8/5PnQ/K7

#2

8 + 4

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Bxf6#
    • 1...Bh6
      • 2.Bf6#
    • 1...Bf8
      • 2.Bf6#
    • 1...Bh8
      • 2.Qxh8#
  • Tries
    • 1.Kb2?
      • threat
        • 2.Bc5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Bf8
        • 2.Bf6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sxe7!
    • 1.Qf4+?
      • 1...Kc3
        • 2.Sb5#
        • 2.Sd5#
      • 1...Sxf4!
    • 1.Qd6+?
      • 1...Kc3
        • 2.Sb5#
        • 2.Qd3#
      • 1...Sxd6!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qxg7#
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke5
        • 2.Sc6#
      • 1...Bxh6
        • 2.Bf6#
      • 1...Be5
        • 2.Qd2#
      • 1...Bf6
        • 2.Bxf6#
      • 1...Bf8
        • 2.Bf6#
      • 1...Bh8
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::B(H),XB(c)
    • B(c);N_GUARD::B(H)
    • B(c);OGATEB::QAB(C),XB(c)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • B(H)
      • Vars
        • S(a);N_GUARD::QAR2(C),XS(a)
        • B(c);N_GUARD::B(H)
        • S(d);N_GUARD::QAR2(C),XS(d)
      • Refutation
        • S(d);XB(H)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(d);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C),XB(c)
    • Vars
      • K(b);S_FLIGHT::S(G)
      • K(b);S_FLIGHT::S(E)
      • B(c);N_GUARD,XQ(C)::B(H)
      • B(c);SBLOCK::QAR2(C)
      • B(c);N_GUARD::B(H),XB(c)
      • B(c);N_GUARD::B(H)
      • B(c);OGATEB::QAB(C),XB(c)
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