MESON Chess Problem Database

Problem Display
PID: 349 (B4R2/4R1KQ/2NPP1Np/2P3pp/4k3/2p4r/qp1pp3/6B1 w - - 0 1)

Schiffmann, Israel Abraham

1st Prize, The Observer, 1928

B4R2/4R1KQ/2NPP1Np/2P3pp/4k3/2p4r/qp1pp3/6B1

#2

11 + 10

887 Mate in Two Moves 1931
4872 Themes-64 1957
1397 Faszinierendes Schachproblem 1963
3098 FIDE Album (1914-1944) (I) 1971
23 Die Schwalbe 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sge5#
    • 1...Kd5
      • 2.Sa5#
    • 1...Qb1
      • 2.Sb4#
      • 2.Sce5#
    • 1...Qd5
      • 2.Sge5#
    • 1...Qxe6
      • 2.Sb4#
    • 1...Rf3
      • 2.Sf4#
  • Tries
    • 1.Sb4+?
      • 1...Qd5
        • 2.Bxd5#
      • 1...Qxa8!
    • 1.Sa5+?
      • 1...Kd3
        • 2.Sf4#
        • 2.Sh4#
        • 2.Se5#
        • 2.Sh8#
      • 1...Qd5!
    • 1.Sa7+?
      • 1...Kd3
        • 2.Se5#
      • 1...Qd5!
    • 1.Rf4+?
      • 1...Kd3
        • 2.Sb4#
        • 2.Sh4#
        • 2.Sge5#
        • 2.Sf8#
        • 2.Sh8#
      • 1...Kd5
        • 2.Sb4#
        • 2.Sa5#
        • 2.Sa7#
      • 1...gxf4!
  • Keys
    • 1.Ree8!
      • threat
        • 2.Sge7#
      • 1...Kd3
        • 2.Sge5#
      • 1...Kd5
        • 2.Sa5#
      • 1...Qxe6
        • 2.Sb4#
      • 1...Qd5
        • 2.Sge5#
      • 1...Rf3
        • 2.Sf4#

There are these versions: 102060, 139871

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(g);S_FLIGHT::QAB(I)+S(F),DCHECK
    • K(g);S_FLIGHT::B(J)+S(C)
    • Q(a);SBLOCK::QAB(I)+S(F)
    • Q(a);N_GUARD,P_SPINQ(a),XP(E)::B(J)+S(C)
    • R(f);SBLOCK::QAB(I)+S(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(J),XQ(a)
      • Refutation
        • Q(a);XB(J)
    • Try
      • S(C);CHECK
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • S(C);CHECK
      • Vars
        • K(g);S_FLIGHT::QAB(I)+S(F),DCHECK
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(K);CHECK
      • Refutation
        • P(h);XR(K)
  • Actual
    • R(G);
    • Threat
      • QAB(I)+S(F)
    • Vars
      • K(g);S_FLIGHT::QAB(I)+S(F),DCHECK
      • K(g);S_FLIGHT::B(J)+S(C)
      • Q(a);N_GUARD,P_SPINQ(a),XP(E)::B(J)+S(C)
      • Q(a);SBLOCK::QAB(I)+S(F)
      • R(f);SBLOCK::QAB(I)+S(F)
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