MESON Chess Problem Database

Problem Display
PID: 203329 (8/3N1K2/2ppP2Q/2Pk4/BR3p1b/3PnrnN/8/3b4 w - - 0 1)

Rietveld, Johannes Jacob

Comm., L'Alfiere di Re, 1924

8/3N1K2/2ppP2Q/2Pk4/BR3p1b/3PnrnN/8/3b4

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Bb3#
    • 1...Se4
      • 2.dxe4#
  • Keys
    • 1.Qxf4!
      • threat
        • 2.Rd4#
      • 1...Rxf4+
        • 2.Sxf4#
      • 1...dxc5
        • 2.Sb6#
      • 1...Bf6
        • 2.Qxd6#
      • 1...Sc2
        • 2.Bb3#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sef5
        • 2.Qc4#
      • 1...Se2
        • 2.Qxf3#
      • 1...Se4
        • 2.dxe4#
      • 1...Sgf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,S_CUTB(a)::B(C)
    • S(d);OGATE::P(A),XS(d)
  • Actual
    • Q(G);P_SPINQ(G),XP(e)
    • Threat
      • R1(D)
    • Vars
      • R(c);CHECK,XQ(G)::S(B),XR(c)
      • P(i);SBLOCK,XP(E)::S(H)
      • B(f);N_PINQ(G)::QAR1(G),XP(i)
      • S(b);N_GUARD,S_CUTB(a)::B(C)
      • S(b);OGATE::P(A),XS(b)
      • S(b);N_PINQ(G)::QAB1(G)
      • S(d);N_GUARD,S_CUTB(a)::QAB(G),XR(c)
      • S(d);OGATE::P(A),XS(d)
      • S(d);N_PINQ(G)::QAB1(G)
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