MESON Chess Problem Database

Problem Display
PID: 35980 (5N2/4pR1p/3P4/4kNP1/1K1R3r/1P3b1q/B5nr/Q1B5 w - - 0 1)

Neumann, Itzhak

4th HM., BCF 004. Ty., 1930-1931

5N2/4pR1p/3P4/4kNP1/1K1R3r/1P3b1q/B5nr/Q1B5

#2

11 + 8

5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4+
      • 2.Qxd4#
    • 1...Be4
      • 2.Rd3#
    • 1...e6
      • 2.Sd7#
  • Tries
    • 1.Rc4+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Kd5!
    • 1.Re4+?
      • 1...Kxe4
        • 2.Qd4#
      • 1...Kd5!
  • Keys
    • 1.Bb1!
      • threat
        • 2.Rxe7#
      • 1...Rxd4+
        • 2.Qxd4#
      • 1...Qxf5
        • 2.Rxf5#
      • 1...exd6
        • 2.Re7#
      • 1...Re4
        • 2.Qa5#
      • 1...Rh6
        • 2.Rd1#
      • 1...Be4
        • 2.Rd3#
      • 1...Bd5
        • 2.Re4#
      • 1...Sf4
        • 2.Rd2#
      • 1...e6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,OGATE,P_SPINR(e),XR(F)::QAB1(A),XR(e)
    • B(c);N_PINR(F),SBLOCK::QAB(A)+R(F)
    • P(g);SBLOCK::S(K)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(A),XR(e)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(f);P-FLIGHT,XR(F)::QAR1(A)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • B(C);
    • Threat
      • R(J),XP(g)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XR(F)::QAB1(A),XR(e)
      • Q(d);OGATE,XS(G)::R1(J),XQ(d)
      • P(g);XP(I)::R(J)
      • R(e);S_CUTB(c)::QAR(A)
      • R(e);N_PINR(F)::QAB(A)+R(F)
      • B(c);N_PINR(F),SBLOCK::QAB(A)+R(F)
      • B(c);SBLOCK::QAB(A)+R(F),DCHECK
      • S(a);N_PINR(F),SBLOCK::QAB(A)+R(F)
      • P(g);SBLOCK::S(K)
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