MESON Chess Problem Database

Problem Display
PID: 66610 (5RBq/2R2N2/3p4/K1Nk3r/1p4r1/3ppP2/1b4n1/3Q4 w - - 0 1)

Neumann, Itzhak

1st HM., Arbejder Magasinet, 1938

5RBq/2R2N2/3p4/K1Nk3r/1p4r1/3ppP2/1b4n1/3Q4

#2

8 + 10

5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qxd3#
    • 1...Kd4
      • 2.Qxd3#
    • 1...Bd4
      • 2.Qb3#
  • Tries
    • 1.Qb3+?
      • 1...Kd4
        • 2.Qxd3#
      • 1...Rc4!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Sf4#
      • 1...Kd4+
        • 2.Sde5#
      • 1...Ke6+
        • 2.Sg5#
      • 1...Qd4
        • 2.Sg5#
      • 1...Rd4
        • 2.Sxh8#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Bd4
        • 2.Qb3#
      • 1...Sf4
        • 2.Sxf4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(g);N_SPINP(c),P_PINS(D),S_FLIGHT::QAB1(A),XP(c)
    • K(g);P-FLIGHT,P_PINS(D)::QAR1(A),XP(c)
    • B(a);N_SPINP(c),SBLOCK,S_CUTR(f)::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK,N_PINP(c)
      • Vars
        • K(g);P-FLIGHT,P_PINS(D)::QAR1(A),XP(c)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • S(D);XP(c)
    • Threat
      • QAR(A)+S(D),DCHECK
    • Vars
      • K(g);CHECK,P-FLIGHT::QAR(A)+S(D)
      • K(g);CHECK,S_FLIGHT::B(H)+S(F),DCHECK
      • Q(j);N_GUARD,SBLOCK::B(H)+S(F)
      • R(f);N_GUARD,SBLOCK::B(H)+S(F),XQ(j)
      • R(f);::QAR(A)+S(D),DCHECK,XR(f)
      • B(a);SBLOCK,S_CUTR(f)::QAB(A)
      • S(b);::QAR(A)+S(D),DCHECK,XS(b)
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