MESON Chess Problem Database

Problem Display
PID: 146689 (5Q2/2ppRKR1/2b2B2/3p4/2NN1kP1/2n5/5PqP/6r1 w - - 0 1)

Petite, Efren

Australian Chess Problem Magazine, 1993

5Q2/2ppRKR1/2b2B2/3p4/2NN1kP1/2n5/5PqP/6r1

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Be5#
  • Tries
    • 1.Ke8?
      • threat
        • 2.Bh4#
      • 1...Qxg4
        • 2.Bg5#
      • 1...Qe4
        • 2.Be5#
      • 1...Se4
        • 2.Be5#
      • 1...d6+!
    • 1.Se3?
      • threat
        • 2.Bg5#
      • 1...Se4
        • 2.Be5#
      • 1...Qxg4!
    • 1.Re3?
      • threat
        • 2.Be5#
      • 1...d6
        • 2.Se6#
      • 1...Qe4!
    • 1.f3?
      • threat
        • 2.Be5#
        • 2.Bg5#
      • 1...Qxh2
        • 2.Be5#
      • 1...Qxg4
        • 2.Be5#
      • 1...dxc4
        • 2.Bg5#
      • 1...Qe2
        • 2.Bg5#
      • 1...Re1
        • 2.Bg5#
      • 1...Se4
        • 2.Be5#
      • 1...d6
        • 2.Bg5#
      • 1...Qxf3!
  • Keys
    • 1.Kg8!
      • threat
        • 2.Bh4#
      • 1...Qxg4
        • 2.Bg5#
      • 1...Qe4
        • 2.Be5#
      • 1...Se4
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::B(F)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAR(J)+B(F)
      • Vars
        • Q(b);SBLOCK,XP(E)::QAR(J)+B(F),DCHECK
        • Q(b);P_PINR(G),SBLOCK::QAR(J)+B(F),DCHECK
        • S(c);SBLOCK::QAR(J)+B(F),DCHECK
      • Refutation
        • P(h);CHECK
    • Try
      • S(C);
      • Threat
        • B(F)
      • Vars
        • S(c);SBLOCK::B(F)
      • Refutation
        • Q(b);XP(E)
    • Try
      • R(G);
      • Threat
        • B(F)
      • Vars
        • P(h);N_GUARD::S(D)
      • Refutation
        • Q(b);
    • Try
      • P(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XP(B)::B(F)
        • Q(b);XP(E)::B(F)
        • P(e);XS(C)::B(F)
        • Q(b);::B(F)
        • R(a);::B(F)
        • S(c);::B(F)
        • P(h);::B(F)
      • Refutation
        • Q(b);XP(A)
  • Actual
    • K(H);S_FLIGHT
    • Threat
      • QAR(J)+B(F)
    • Vars
      • Q(b);P_PINR(I),SBLOCK,XP(E)::QAR(J)+B(F),DCHECK
      • Q(b);SBLOCK::QAR(J)+B(F),DCHECK
      • S(c);SBLOCK::QAR(J)+B(F),DCHECK
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