MESON Chess Problem Database

Problem Display
PID: 45410 (4r3/Q4nb1/3P2nR/B2Nkp2/1pB2RbP/4NPp1/6P1/4K3 w - - 0 1)

Lender, Baruch

1st Prize, Israel Ring Ty., 1966

4r3/Q4nb1/3P2nR/B2Nkp2/1pB2RbP/4NPp1/6P1/4K3

#2

12 + 9

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Sxh4
      • 2.Qd4#
    • 1...Se7
      • 2.Qd4#
    • 1...Sf8
      • 2.Qd4#
    • 1...Sgh8
      • 2.Qd4#
  • Tries
    • 1.Sxb4?
      • threat
        • 2.Qd4#
      • 1...Kxf4
        • 2.Sd3#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Sxf4
        • 2.Sc6#
      • 1...Kf6!
    • 1.Re4+?
      • 1...Kxd6
        • 2.Qc7#
      • 1...fxe4!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Sb6#
        • 2.Sf6#
      • 1...Kxd6!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qd4#
      • 1...Kxf4
        • 2.Sxg6#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kf6
        • 2.Sxg4#
      • 1...Sxf4
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(f);XP(G)::QAB1(L)
    • S(f);::QAB1(L)
  • Tries
    • Try
      • S(I);XP(b)
      • Threat
        • QAB1(L)
      • Vars
        • K(d);P_PINS(C),S_FLIGHT,XR(F)::S(I)
        • K(d);OGATEB,P_PINS(C),P_SPINS(f),S_FLIGHT,XP(J)::QAB1(L)
        • S(f);SBLOCK,XR(F)::S(I)
      • Refutation
        • K(d);P_PINS(C),P_SPINP(e),P_SPINS(f),S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P_SPINS(f),S_FLIGHT,XP(J)::QAB1(L)
      • Refutation
        • P(e);XR(F)
    • Try
      • Q(L);CHECK
      • Refutation
        • K(d);P_PINS(C),P_SPINS(f),S_FLIGHT,XP(J)
  • Actual
    • S(I);
    • Threat
      • QAB1(L)
    • Vars
      • K(d);S_FLIGHT,XR(F)::S(I),XS(f)
      • K(d);OGATEB,P_SPINS(f),S_FLIGHT,XP(J)::QAB1(L)
      • K(d);P_SPINP(e),P_SPINS(f),S_FLIGHT::S(C),XB(c)
      • S(f);SBLOCK,XR(F)::S(I)
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