MESON Chess Problem Database

Problem Display
PID: 6377 (4nBr1/5Nr1/1p5b/qp1p4/3kp2Q/2R1RP2/BP1K1P2/8 w - - 0 1)

Schiffmann, Israel Abraham

1st Prize, Brisbane Sports Referee, 1929/I

4nBr1/5Nr1/1p5b/qp1p4/3kp2Q/2R1RP2/BP1K1P2/8

#2

10 + 10

881 The Australasian Chess Review 1929
1397 Faszinierendes Schachproblem 1963
5862 An ABC of Chess Problems 1970
3098 FIDE Album (1914-1944) (I) 1971
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3+
      • 2.bxc3#
    • 1...Qa4
      • 2.Rd3#
    • 1...Qa6
      • 2.Rd3#
    • 1...Qa7
      • 2.Rd3#
    • 1...Qa8
      • 2.Rd3#
    • 1...Rg5
      • 2.Rd3#
    • 1...Bxe3+
      • 2.fxe3#
    • 1...Sd6
      • 2.Qf6#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sc7
      • 2.Qf6#
    • 1...b4
      • 2.Rd3#
  • Tries
    • 1.Bxg7+?
      • 1...Bxg7
        • 2.Rd3#
      • 1...Sf6
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Sxg7
        • 2.Qf6#
      • 1...Rxg7!
    • 1.Qf4?
      • threat
        • 2.Rd3#
        • 2.Qe5#
      • 1...Qxc3+
        • 2.bxc3#
      • 1...Rxf7
        • 2.Rd3#
      • 1...Rg5
        • 2.Rd3#
      • 1...Bxf4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxd5#
      • 1...Qxc3+
        • 2.bxc3#
      • 1...Bxe3+
        • 2.fxe3#
      • 1...Qxa2
        • 2.Qxb6#
      • 1...Qa8
        • 2.Qxb6#
      • 1...Rg5
        • 2.Rxe4#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sc7
        • 2.Qf6#
      • 1...b4
        • 2.Rc4#

This anticipates 18948(1959)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(c);CHECK,OGATE,P_PINR(F),XR(E)::P(B),XQ(c)
    • Q(c);N_PINR(E),P_PINR(F)::R1(E)
    • R(h);OGATE::R1(F)
    • B(g);CHECK,OGATE,XR(F)::P(D),XB(g)
    • S(i);N_GUARD::QAB(H)
    • S(i);N_GUARD::QAB(H),XS(i)
    • P(d);N_PINR(E),P_PINR(F)::R1(E)
  • Tries
    • Try
      • B(J);CHECK,XR(h)
      • Vars
        • B(g);OGATE,XB(J)::R1(F)
        • S(i);N_GUARD,XB(J)::QAB(H)
      • Refutation
        • R(j);XB(J)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATE,XR(E)::P(B),XQ(c)
        • R(h);XS(I)::R1(F)
        • R(h);::R1(F)
      • Refutation
        • B(g);N_SPINP(b),XQ(H)
  • Actual
    • Q(H);N_PINP(b),P_PINP(e)
    • Threat
      • QAR1(H),XP(e)
    • Vars
      • Q(c);CHECK,OGATE,P_PINR(F),XR(E)::P(B),XQ(c)
      • B(g);CHECK,OGATE,XR(F)::P(D),XB(g)
      • Q(c);N_GUARD,N_PINR(E),P_PINP(B),P_PINR(F),XB(A)::QAB(H),XP(f)
      • Q(c);N_GUARD,N_PINR(E),P_PINR(F)::QAB(H),XP(f)
      • R(h);OGATE::R1(F),XP(b)
      • S(i);N_GUARD,N_SPINP(e)::QAB(H)
      • S(i);N_GUARD::QAB(H),XS(i)
      • S(i);N_GUARD::QAB(H)
      • P(d);N_PINR(E),P_PINR(F)::R1(E)
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