MESON Chess Problem Database

Problem Display
PID: 66603 (8/1n2B2K/1N6/Rr2kPQ1/1p1rB1p1/2np1P2/2N1q1p1/4R3 w - - 0 1)

Neumann, Itzhak

3rd Prize, American Chess Bulletin, 1957

8/1n2B2K/1N6/Rr2kPQ1/1p1rB1p1/2np1P2/2N1q1p1/4R3

#2

10 + 10

5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.f4#
    • 1...Qxc2
      • 2.f4#
    • 1...Qxe4
      • 2.f4#
    • 1...Rc4
      • 2.Sxc4#
      • 2.Sd7#
    • 1...Rdd5
      • 2.Sc4#
    • 1...Rd6
      • 2.Sc4#
    • 1...Rd7
      • 2.Sc4#
      • 2.Sxd7#
    • 1...Rd8
      • 2.Sc4#
    • 1...Rbd5
      • 2.Sd7#
    • 1...Sxe4
      • 2.f4#
    • 1...Sd5
      • 2.Sd7#
    • 1...Sd6
      • 2.Sd7#
      • 2.Bf6#
    • 1...g3
      • 2.Qxg3#
  • Tries
    • 1.Bd6+?
      • 1...Rxd6
        • 2.Sc4#
      • 1...Sxd6
        • 2.Sd7#
      • 1...Kxd6!
  • Keys
    • 1.Bd5!
      • threat
        • 2.f6#
      • 1...Rdxd5
        • 2.Sc4#
      • 1...Rbxd5
        • 2.Sd7#
      • 1...Sxd5
        • 2.Sd7#
      • 1...Qe4
        • 2.f4#
      • 1...Rf4
        • 2.Qf6#
      • 1...Se4
        • 2.f4#
      • 1...Sd6
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);::P(C)
    • Q(a);XS(B)::P(C)
    • Q(a);P_PINP(F),P_SPINQ(a),XB(D)::P(C)
    • R(f);N_GUARD,N_SPINR(h)::S(H)
    • R(f);N_GUARD::S(H)
    • R(h);S_CUTR(f)::S(H)
    • S(c);SBLOCK,XB(D)::P(C)
    • S(c);N_SPINR(h),S_CUTR(f)::S(H)
    • P(g);OGATE::QAB(G),XP(g)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • R(f);XB(I)::S(H)
        • S(j);SBLOCK,XB(I)::S(H)
      • Refutation
        • K(i);N_SPINR(h),S_FLIGHT,XB(I)
  • Actual
    • B(D);N_PINR(h),P_PINQ(a)
    • Threat
      • QAR(G)+P(F)
    • Vars
      • R(f);N_GUARD,SBLOCK,XB(D)::S(H)
      • R(h);P_SPINR(h),XB(D)::S(H)
      • S(c);SBLOCK,XB(D)::S(H)
      • Q(a);P_PINP(F),S_CUTR(f)::P(C)
      • R(f);SBLOCK::QAB1(G)
      • S(c);N_SPINQ(a),S_CUTR(f)::P(C)
      • S(j);SBLOCK::B(I)
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