MESON Chess Problem Database

Problem Display
PID: 189961 (8/8/2p3Q1/K2kp3/N2p4/8/4B3/8 w - - 0 1)

Larsen, Karl Adolf Koefoed

Skakbladet, 1913

8/8/2p3Q1/K2kp3/N2p4/8/4B3/8

#2

4 + 4

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sb6#
  • Tries
    • 1.Bd3?
      • 1...c5
        • 2.Sb6#
      • 1...e4!
    • 1.Bf3+?
      • 1...Kc4
        • 2.Qc2#
      • 1...e4!
    • 1.Qf7+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kd6!
  • Keys
    • 1.Bg4!
      • 1...Kc4
        • 2.Be6#
      • 1...d3
        • 2.Qxd3#
      • 1...e4
        • 2.Qe6#
      • 1...c5
        • 2.Sb6#

Anticipated by 17135(1902)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::S(B)
  • Tries
    • Try
      • B(A);
      • Vars
        • P(d);SBLOCK::S(B)
      • Refutation
        • P(c);
    • Try
      • B(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(D)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(A);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • P(a);OGATEB::QAR2(D),XP(a)
      • P(c);::QAB1(D)
      • P(d);SBLOCK::S(B)
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