MESON Chess Problem Database

Problem Display
PID: 121105 (3Q4/2P1P3/8/8/3P4/3K4/2NnN3/3k4 w - - 0 1)

Niemeijer, Meindert

Inspanning en Ontspanning, 1969

3Q4/2P1P3/8/8/3P4/3K4/2NnN3/3k4

#2

7 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb8?
      • 1...Sb1
        • 2.Qxb1#
      • 1...Sf1
        • 2.Qb1#
      • 1...Sf3
        • 2.Qb1#
      • 1...Sc4
        • 2.Qb1#
      • 1...Se4
        • 2.Qb1#
      • 1...Sb3!
    • 1.Qf8?
      • 1...Sb1
        • 2.Qf1#
      • 1...Sf1
        • 2.Qxf1#
      • 1...Sb3
        • 2.Qf1#
      • 1...Sc4
        • 2.Qf1#
      • 1...Se4
        • 2.Qf1#
      • 1...Sf3!
  • Keys
    • 1.Qa8!
      • 1...Sb1
        • 2.Qh1#
      • 1...Sf1
        • 2.Qa1#
      • 1...Sb3
        • 2.Qh1#
      • 1...Sf3
        • 2.Qa1#
      • 1...Sc4
        • 2.Qh1#
        • 2.Qa1#
      • 1...Se4
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);
      • Vars
        • S(b);N_GUARD::QAR2(G),XS(b)
        • S(b);N_GUARD::QAR2(G)
      • Refutation
        • S(b);
    • Try
      • Q(G);
      • Vars
        • S(b);N_GUARD::QAR2(G)
        • S(b);N_GUARD::QAR2(G),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(G);
    • Vars
      • S(b);N_GUARD::QAR(G)
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