MESON Chess Problem Database

Problem Display
PID: 248120 (3R2b1/2KQ2P1/p1P1N2r/r3kpB1/3Np3/b5P1/2qp4/8 w - - 0 1)

Fjellstrom, Zakarias

Commendable Mention, White MT (A), 1952-1953

3R2b1/2KQ2P1/p1P1N2r/r3kpB1/3Np3/b5P1/2qp4/8

#2

9 + 10

14867 BCPS Library 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6+
      • 2.Sxc6#
    • 1...Ra4
      • 2.Qd5#
    • 1...Rc5
      • 2.Qd6#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Rf6
      • 2.Bf4#
    • 1...Rh8
      • 2.gxh8Q#
      • 2.gxh8B#
    • 1...Bc1
      • 2.Qd6#
    • 1...Bb2
      • 2.Qd6#
    • 1...Bc5
      • 2.Qd5#
    • 1...Bd6+
      • 2.Qxd6#
    • 1...f4
      • 2.gxf4#
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qxf5#
      • 1...Rxc6+
        • 2.Sxc6#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Re6
        • 2.Qd5#
      • 1...Rf6
        • 2.Bf4#
      • 1...Be6
        • 2.Qd6#
      • 1...Bh7
        • 2.Qd5#
      • 1...e3
        • 2.Sf3#
      • 1...f4
        • 2.Qf5#
        • 2.gxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • Q(a);CHECK,XP(D)::S(B),XQ(a)
    • R(e);N_GUARD::QAR1(G)
    • R(e);S_CUTB(c)::QAB1(G)
    • R(e);N_GUARD::QAR1(G),XR(e)
    • R(i);SBLOCK::B(C)
    • R(i);OGATE::PXR(i)=Q
    • B(c);N_GUARD::QAB1(G)
    • B(c);N_PINP(D),S_CUTR(e)::QAR1(G)
    • B(c);CHECK,N_GUARD::QAB1(G),XB(c)
    • P(g);OGATE::P(A),XP(g)
  • Actual
    • S(E);N_SPINP(D)
    • Threat
      • QAR1(G),XP(g)
    • Vars
      • R(i);CHECK,XP(D)::S(B),XR(i)
      • R(i);N_GUARD::QAB1(G),XR(i)
      • B(j);N_GUARD::QAR1(G),XB(j)
      • R(i);S_CUTB(j)::QAR1(G)
      • R(i);SBLOCK::B(C)
      • B(j);S_CUTR(i)::QAB1(G)
      • B(j);N_GUARD::QAR1(G)
      • P(d);N_GUARD::S(B)
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