MESON Chess Problem Database

Problem Display
PID: 274623 (6Q1/3p4/Np1k1pNK/1Pr1rP2/3P4/8/2R1R3/8 w - - 0 1)

Niemeijer, Meindert

Mat, 1973

6Q1/3p4/Np1k1pNK/1Pr1rP2/3P4/8/2R1R3/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rcd5
      • 2.Qb8#
    • 1...Red5
      • 2.Qf8#
  • Tries
    • 1.Rcd2?
      • threat
        • 2.dxc5#
        • 2.dxe5#
      • 1...Rxe2
        • 2.dxc5#
      • 1...Rxf5
        • 2.dxc5#
      • 1...Re6
        • 2.dxc5#
      • 1...Rc1
        • 2.dxe5#
      • 1...Rc2
        • 2.dxe5#
      • 1...Rc3
        • 2.dxe5#
      • 1...Rc4
        • 2.dxe5#
      • 1...Rcd5
        • 2.Qb8#
      • 1...Rc6
        • 2.dxe5#
      • 1...Rc7
        • 2.dxe5#
      • 1...Rc8
        • 2.dxe5#
      • 1...Re3
        • 2.dxc5#
      • 1...Re4
        • 2.dxc5#
      • 1...Red5
        • 2.Qf8#
      • 1...Re7
        • 2.dxc5#
      • 1...Re8
        • 2.dxc5#
      • 1...Rxb5!
  • Keys
    • 1.Red2!
      • threat
        • 2.dxc5#
        • 2.dxe5#
      • 1...Rxc2
        • 2.dxe5#
      • 1...Rxb5
        • 2.dxe5#
      • 1...Rxf5
        • 2.dxc5#
      • 1...Re6
        • 2.dxc5#
      • 1...Rc3
        • 2.dxe5#
      • 1...Rc4
        • 2.dxe5#
      • 1...Rcd5
        • 2.Qb8#
      • 1...Rc6
        • 2.dxe5#
      • 1...Rc7
        • 2.dxe5#
      • 1...Rc8
        • 2.dxe5#
      • 1...Re1
        • 2.dxc5#
      • 1...Re2
        • 2.dxc5#
      • 1...Re3
        • 2.dxc5#
      • 1...Re4
        • 2.dxc5#
      • 1...Red5
        • 2.Qf8#
      • 1...Re7
        • 2.dxc5#
      • 1...Re8
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,SBLOCK::QAB(I)
    • R(b);N_GUARD,SBLOCK::QAB(I)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XR(B)::R(A)+P(C)DCHECK,XR(a)
        • R(b);XP(E)::R(A)+P(C)DCHECK,XR(a)
        • R(b);::R(A)+P(C)DCHECK,XR(a)
        • R(a);::R(A)+P(C)DCHECK,XR(b)
        • R(a);N_GUARD,SBLOCK::QAB(I)
        • R(b);N_GUARD,SBLOCK::QAB(I)
      • Refutation
        • R(a);XP(D)
  • Actual
    • R(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);XR(A)::R(B)+P(C)DCHECK,XR(b)
      • R(a);XP(D)::R(B)+P(C)DCHECK,XR(b)
      • R(b);XP(E)::R(B)+P(C)DCHECK,XR(a)
      • R(b);::R(B)+P(C)DCHECK,XR(a)
      • R(a);::R(B)+P(C)DCHECK,XR(b)
      • R(a);N_GUARD,SBLOCK::QAB(I)
      • R(b);N_GUARD,SBLOCK::QAB(I)
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