MESON Chess Problem Database

Problem Display
PID: 159293 (3k4/1Kn2P2/3PP1n1/8/5b2/8/8/3Q4 w - - 0 1)

Abdullayev, Elmar

Sp. Comm., ChessStar, 2015

3k4/1Kn2P2/3PP1n1/8/5b2/8/8/3Q4

#2

5 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd6
      • 2.Qxd6#
    • 1...Se7
      • 2.dxc7#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qxc7#
      • 1...Sxe6
        • 2.Qc8#
      • 1...Sb5
        • 2.Qc8#
      • 1...Sd5
        • 2.Qc8#
      • 1...Sa6
        • 2.Qc8#
      • 1...Sa8
        • 2.Qc8#
      • 1...Se8
        • 2.Qc8#
      • 1...Bxd6!
    • 1.e7+?
      • 1...Sxe7
        • 2.dxc7#
      • 1...Kd7!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qd7#
      • 1...Sxe6
        • 2.Qe8#
      • 1...Se5
        • 2.e7#
      • 1...Sf8
        • 2.e7#
      • 1...Sb5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE,P_SPINB(a),XP(B)::QAR2(A),XB(a)
    • S(b);SBLOCK::QAR(A)+P(B)DCHECK,XS(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XS(c)
      • Vars
        • S(c);OGATE,XP(C)::QAR1(A)
        • S(c);OGATE::QAR1(A)
      • Refutation
        • B(a);XP(B)
    • Try
      • P(C);CHECK
      • Vars
        • S(b);SBLOCK,XP(C)::QAR(A)+P(B)DCHECK,XS(c)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(c);N_GUARD,XP(C)::QAR1(A)
      • S(b);N_GUARD::P(C)
      • S(c);N_GUARD::QAR(A)
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