MESON Chess Problem Database

Problem Display
PID: 213811 (8/8/2K5/2QN4/3Pk2N/2R1Prb1/b6q/8 w - - 0 1)

Nanning, Frederik Willem

Suomen Shakki, 1957

8/8/2K5/2QN4/3Pk2N/2R1Prb1/b6q/8

#2

7 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Rxe3#
    • 1...Rf4
      • 2.Qe7#
    • 1...Rf6+
      • 2.Sxf6#
    • 1...Bxd5+
      • 2.Qxd5#
    • 1...Bf4
      • 2.Sf6#
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qe5#
        • 2.Qf5#
      • 1...Bd5+
        • 2.Qxd5#
      • 1...Qxh4
        • 2.Qe5#
      • 1...Rxe3
        • 2.Qe5#
      • 1...Rxf4
        • 2.Qe5#
      • 1...Bxf4
        • 2.Qf5#
      • 1...Bxh4
        • 2.Qe5#
      • 1...Qh3
        • 2.Qe5#
      • 1...Be6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATE,XP(B)::R1(A),XR(c)
    • R(c);S_CUTB(d)::QAR(E)
    • R(c);CHECK,N_GUARD::S(F),XR(c)
    • B(a);CHECK,OGATE,XS(F)::QAB1(E),XB(a)
    • B(d);S_CUTR(c)::S(F)
  • Actual
    • S(F);
    • Threat
      • DUALS(2)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(E),XB(a)
      • Q(b);XS(D)::QAR1(E)
      • R(c);XP(B)::QAR1(E)
      • R(c);XS(F)::QAR1(E)
      • B(d);XS(F)::QAB1(E)
      • B(d);XS(D)::QAR1(E)
      • Q(b);::QAR1(E)
      • B(a);::QAR1(E)
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