MESON Chess Problem Database

Problem Display
PID: 6217 (3n4/2n1p3/2r1P1QR/2p1k1N1/2K2N1q/3P1R2/4pr1B/1B6 w - - 0 1)

Schiffmann, Israel Abraham

2/3 Prize, Belgrade Chess Club, 1928

3n4/2n1p3/2r1P1QR/2p1k1N1/2K2N1q/3P1R2/4pr1B/1B6

#2

10 + 9

1397 Faszinierendes Schachproblem 1963
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4+
      • 2.Bxf4#
    • 1...Rd6
      • 2.Re3#
      • 2.Qe4#
    • 1...Sxe6
      • 2.Sf7#
    • 1...Sb7
      • 2.Sf7#
    • 1...Sf7
      • 2.Sxf7#
  • Tries
    • 1.Rh5?
      • threat
        • 2.Sf7#
      • 1...Qxf4+
        • 2.Se4#
        • 2.Bxf4#
      • 1...Kd6
        • 2.Se4#
      • 1...Qxg5
        • 2.Sg2#
      • 1...Sf7
        • 2.Sxf7#
      • 1...Qxh5!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Se4#
      • 1...Kxf5!
    • 1.Qf6+?
      • 1...Kd6
        • 2.Se4#
      • 1...exf6!
    • 1.Qg7+?
      • 1...Kd6
        • 2.Se4#
      • 1...Kf5!
    • 1.d4+?
      • 1...Kd6
        • 2.Se4#
      • 1...cxd4+!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Sf7#
      • 1...Qxf4+
        • 2.Se4#
      • 1...Kf5
        • 2.d4#
      • 1...Kd6
        • 2.Se4#
      • 1...Qxg5
        • 2.Sg2#
      • 1...Qxh5
        • 2.Sg6#
      • 1...Sf7
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::B(B),XQ(c)
    • S(i);N_GUARD,XP(H)::S(G)
    • S(i);N_GUARD::S(G)
    • S(i);N_GUARD::S(G),XS(i)
  • Tries
    • Try
      • R(J);
      • Threat
        • R(J)+S(G),DCHECK
      • Vars
        • K(e);S_FLIGHT::S(G)
        • Q(c);N_PINS(F),P_SPINQ(c),XS(G)::B(B)+S(F)
        • S(i);::R(J)+S(G),DCHECK,XS(i)
      • Refutation
        • Q(c);N_PINS(F),XR(J)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);S_FLIGHT::S(G)
      • Refutation
        • K(e);P-FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);S_FLIGHT::S(G)
      • Refutation
        • P(h);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);S_FLIGHT::S(G)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • P(C);CHECK,N_SPINS(F)
      • Vars
        • K(e);S_FLIGHT::S(G)
      • Refutation
        • P(d);CHECK,XP(C)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)+S(G),DCHECK
    • Vars
      • Q(c);CHECK,N_GUARD,P_SPINQ(c),XS(F)::QAR(I)+S(G)
      • K(e);P-FLIGHT::B(A)+P(C)
      • K(e);S_FLIGHT::S(G)
      • Q(c);N_PINS(F),P_SPINQ(c),XS(G)::B(B)+S(F)
      • Q(c);N_PINS(F),XQ(I)::B(B)+S(F),DCHECK
      • S(i);::QAR(I)+S(G),DCHECK,XS(i)
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