MESON Chess Problem Database

Problem Display
PID: 110505 (8/8/8/8/KQ6/b2N4/2k2N2/8 w - - 0 1)

Myllyniemi, Matti Arvo

Borsodi Vegyesz, 1965-1966

8/8/8/8/KQ6/b2N4/2k2N2/8

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Se1#
    • 1...Bb2
      • 2.Qxb2#
  • Tries
    • 1.Ka5?
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bc1
        • 2.Se1#
      • 1...Bxb4+!
    • 1.Kb5?
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bc1
        • 2.Se1#
      • 1...Bxb4!
    • 1.Qxa3?
      • threat
        • 2.Qc1#
        • 2.Qb2#
      • 1...Kb1
        • 2.Qb2#
      • 1...Kd2!
  • Keys
    • 1.Qe1!
      • 1...Bc1
        • 2.Qxc1#
      • 1...Bb2
        • 2.Sb4#
      • 1...Bb4
        • 2.Qc1#
      • 1...Bc5
        • 2.Qc1#
      • 1...Bd6
        • 2.Qc1#
      • 1...Be7
        • 2.Qc1#
      • 1...Bf8
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::S(B)
    • B(b);N_GUARD::QAR1(D),XB(b)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • B(b);N_GUARD::QAR1(D),XB(b)
        • B(b);SBLOCK::S(B)
      • Refutation
        • B(b);CHECK,XQ(D)
    • Try
      • K(C);S_FLIGHT
      • Vars
        • B(b);N_GUARD::QAR1(D),XB(b)
        • B(b);SBLOCK::S(B)
      • Refutation
        • B(b);XQ(D)
    • Try
      • Q(D);XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • B(b);N_GUARD::QAR1(D),XB(b)
      • B(b);N_GUARD,SBLOCK::S(B)
      • B(b);N_GUARD::QAR1(D)
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