MESON Chess Problem Database

Problem Display
PID: 78418 (2BB4/8/7p/5P1N/K5k1/6Nn/8/4b2Q w - - 0 1)

Shire, David J

Australian Chess, 2007

2BB4/8/7p/5P1N/K5k1/6Nn/8/4b2Q

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qd1#
    • 1...Bf2
      • 2.Qd1#
    • 1...Bc3
      • 2.Qd1#
    • 1...Bxg3
      • 2.Qd1#
    • 1...Bb4
      • 2.Qd1#
    • 1...Ba5
      • 2.Qd1#
  • Tries
    • 1.Bb7?
      • threat
        • 2.Bf3#
        • 2.Qf3#
      • 1...Bxg3
        • 2.Qf3#
      • 1...Sg1
        • 2.Qh4#
      • 1...Sf2
        • 2.Bf3#
        • 2.Qh4#
      • 1...Sf4
        • 2.Bf3#
        • 2.Qh4#
      • 1...Sg5!
    • 1.f6+?
      • 1...Kh4
        • 2.f7#
      • 1...Kg5!
  • Keys
    • 1.Se4!
      • 1...Kxh5
        • 2.Qf3#
      • 1...Sg1
        • 2.f6#
      • 1...Bd2
        • 2.Qd1#
      • 1...Bf2
        • 2.Qd1#
      • 1...Bc3
        • 2.Qd1#
      • 1...Bg3
        • 2.Qd1#
      • 1...Bb4
        • 2.Qd1#
      • 1...Bh4
        • 2.Qd1#
      • 1...Ba5
        • 2.Qd1#
      • 1...Sf2
        • 2.f6#
      • 1...Sf4
        • 2.Shf6#
      • 1...Sg5
        • 2.Sef6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE::QAB(A)
    • B(a);OGATE,XS(B)::QAB(A)
  • Tries
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XS(B)::QAB1(A)
        • S(b);OGATE::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • P(D);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::B(G)+P(D)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT,XS(E)::QAB(A)
      • S(b);::B(F)+P(D)
      • B(a);OGATE::QAB(A)
      • S(b);SBLOCK::S(E)
      • S(b);SBLOCK::S(B)
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