MESON Chess Problem Database

Problem Display
PID: 6477 (8/1n1Pp3/b3PkNP/R3N1p1/r2Q2P1/p5K1/B4B2/3r1R2 w - - 0 1)

Schiffmann, Israel Abraham

3rd Prize, Dutch East Indies Chess Association, 1929

8/1n1Pp3/b3PkNP/R3N1p1/r2Q2P1/p5K1/B4B2/3r1R2

#2

12 + 8

35 L'Italia Scacchistica 1930
1397 Faszinierendes Schachproblem 1963
5862 An ABC of Chess Problems 1970
56 The Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3+
      • 2.Be3#
  • Tries
    • 1.Sd3+?
      • 1...Kxg6
        • 2.Qg7#
      • 1...Rxd4!
    • 1.d8Q?
      • threat
        • 2.Qxe7#
        • 2.Qf8#
        • 2.Qh8#
      • 1...Rd3+
        • 2.Be3#
      • 1...Rc4
        • 2.Qxe7#
      • 1...Bc4
        • 2.Qxe7#
      • 1...Sd6
        • 2.Qxe7#
        • 2.Qh8#
      • 1...Sxd8!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Sh7#
      • 1...Rd3+
        • 2.Be3#
      • 1...Rc4
        • 2.Be1#
      • 1...Bd3
        • 2.Sc4#
      • 1...Bc4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,N_GUARD,S_CUTB(e)::R(A)+B(C)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT,XS(J)::QAR1(E)
      • Refutation
        • R(c);XQ(E)
    • Try
      • P(L);P_PINP(h)
      • Threat
        • DUALS(3)
      • Vars
        • R(a);CHECK,N_GUARD,S_CUTB(e)::R(A)+B(C)
        • R(c);::QAB1(L),XP(h)
        • B(e);::QAB1(L),XP(h)
      • Refutation
        • S(g);N_SPINP(h),XQ(L)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • R(a);CHECK,N_GUARD,S_CUTB(e)::R(A)+B(C)
      • R(c);S_CUTB(e)::R(A)+B(C)
      • B(e);S_CUTR(a)::QAB(E)+S(H)
      • B(e);S_CUTR(c)::QAB(E)+S(H)
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