MESON Chess Problem Database

Problem Display
PID: 79738 (8/8/5K1N/5p2/5k1P/1Q5p/3p1N1b/3B1nn1 w - - 0 1)

Willmott, Arthur

Problem Observer, 2008

8/8/5K1N/5p2/5k1P/1Q5p/3p1N1b/3B1nn1

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qb8#
    • 1...Sf3
      • 2.Qxf3#
  • Tries
    • 1.Sxh3+?
      • 1...Sxh3
        • 2.Qf3#
      • 1...Ke4!
    • 1.Sxf5?
      • threat
        • 2.Qa4#
        • 2.Qc4#
        • 2.Qb4#
        • 2.Qb8#
      • 1...Se3
        • 2.Qxe3#
        • 2.Qb8#
      • 1...Sg3
        • 2.Qe3#
        • 2.Qb8#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Se2!
    • 1.Qc3?
      • threat
        • 2.Qe5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Se2!
  • Keys
    • 1.Qd3!
      • 1...Se3
        • 2.Qd6#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Se2
        • 2.Sxh3#
      • 1...Bg3
        • 2.Qd4#
      • 1...Sg3
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::QAB(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
  • Tries
    • Try
      • S(B);CHECK,XP(e)
      • Vars
        • S(b);XS(B)::QAR1(C)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(F);XP(g)
      • Threat
        • DUALS(4)
      • Vars
        • S(b);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(b);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(C);
    • Vars
      • S(a);SBLOCK::QAB(C)
      • S(b);N_GUARD::QAR1(C),XS(b)
      • S(b);N_GUARD::S(B),XP(e)
      • B(d);SBLOCK::QAR2(C)
      • S(a);N_GUARD,SBLOCK::QAB(C),XP(c)
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Developed and maintained by Brian Stephenson.
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