MESON Chess Problem Database

Problem Display
PID: 66821 (3Rr3/b2q3B/8/Qb1r4/1R2p1p1/1P1k1P2/p1pP1B2/n1n1K2N w - - 0 1)

Neumann, Itzhak

4th HM., Brisbane Sports and Radio, 1933

3Rr3/b2q3B/8/Qb1r4/1R2p1p1/1P1k1P2/p1pP1B2/n1n1K2N

#2

10 + 12

5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qxb5#
    • 1...Qe6
      • 2.Qxb5#
    • 1...Qe7
      • 2.Qxb5#
    • 1...Qf7
      • 2.Qxb5#
    • 1...Qg7
      • 2.Qxb5#
    • 1...Qxh7
      • 2.Qxb5#
    • 1...Rxd8
      • 2.Bxe4#
    • 1...Rf8
      • 2.Bxe4#
    • 1...Rg8
      • 2.Bxe4#
    • 1...Rh8
      • 2.Bxe4#
    • 1...Bxf2+
      • 2.Sxf2#
  • Tries
    • 1.Bxa7?
      • threat
        • 2.Sf2#
      • 1...Qxa7
        • 2.Qxb5#
      • 1...g3!
    • 1.Rd4+?
      • 1...Rxd4
        • 2.Qc3#
      • 1...Bxd4!
  • Keys
    • 1.Rxe4!
      • threat
        • 2.Qc3#
      • 1...Rxe4+
        • 2.Bxe4#
      • 1...Bxf2+
        • 2.Sxf2#
      • 1...Qc6
        • 2.Re6#
      • 1...Qc8
        • 2.Re6#
      • 1...Qc7
        • 2.Re7#
      • 1...Qg7
        • 2.Qxb5#
      • 1...Rc5
        • 2.Re5#
      • 1...Bd4
        • 2.Re3#
      • 1...Se2
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • Q(k);N_GUARD,N_SPINP(f),P_SPINR(i)::QAB(H),XB(h)
    • Q(k);N_GUARD,P_SPINR(i)::QAB(H),XB(h)
    • Q(k);N_GUARD,N_SPINP(f),P_SPINR(i),XB(I)::QAB(H),XB(h)
    • R(l);N_GUARD,XR(J)::B(I),XP(f)
    • R(l);N_GUARD::B(I),XP(f)
    • B(j);CHECK,XB(D)::S(B),XB(j)
  • Tries
    • Try
      • B(D);XB(j)
      • Threat
        • S(B)
      • Vars
        • Q(k);N_GUARD,P_SPINR(i),XB(D)::QAB(H),XB(h)
      • Refutation
        • P(g);
    • Try
      • R(G);CHECK
      • Vars
        • R(i);XR(G)::QAR1(H)
      • Refutation
        • B(j);XR(G)
  • Actual
    • R(G);P_SPINR(G),XP(f)
    • Threat
      • QAR1(H)
    • Vars
      • R(l);CHECK,OGATE,P_SPINR(l),XR(G)::B(I),XR(l)
      • B(j);CHECK,XB(D)::S(B),XB(j)
      • Q(k);N_GUARD,P_SPINR(i)::B(I)+R(G)
      • Q(k);N_GUARD,P_SPINR(i)::QAB(H),XB(h)
      • R(i);P_SPINQ(k)::B(I)+R(G)
      • B(j);SBLOCK::B(I)+R(G),DCHECK
      • S(b);N_PINR(G)::B(I)+R(G),DCHECK
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