MESON Chess Problem Database

Problem Display
PID: 21337 (q2Q1r2/2b5/3nP3/1p2R1BB/3P2P1/1R1P1kN1/3P3K/2N5 w - - 0 1)

Weenink, Henri Gerard Maria

Good Companions (January black Knight), 1918

q2Q1r2/2b5/3nP3/1p2R1BB/3P2P1/1R1P1kN1/3P3K/2N5

#2

13 + 6

3132 The Good Companion Two-Mover 1922
16055 HGM Weenink (Euwe/Niemeijer/Rueb/Trotsenburg) 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Qf6#
    • 1...Sc8
      • 2.Qxf8#
  • Tries
    • 1.Re1?
      • threat
        • 2.Rf1#
      • 1...Kf2
        • 2.Rf1#
      • 1...Se4!
    • 1.Qxf8+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Qxf8!
  • Keys
    • 1.Sh1!
      • threat
        • 2.Re3#
      • 1...Qe4
        • 2.dxe4#
      • 1...Sc4
        • 2.dxc4#
      • 1...Se4
        • 2.dxe4#
      • 1...Sf5
        • 2.gxf5#
      • 1...Sb7
        • 2.Qd5#
      • 1...Sf7
        • 2.Qf6#
      • 1...Sc8
        • 2.Qxf8#
      • 1...Se8
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD,S_CUTR(f)::QAR(M)
    • S(c);N_GUARD,S_CUTQ(e)::QAR(M),XR(f)
  • Tries
    • Try
      • R(I);
      • Threat
        • R(I)
      • Vars
        • K(a);P-FLIGHT::R1(I)
      • Refutation
        • S(c);P_PINS(F)
    • Try
      • Q(M);CHECK,XR(f)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR2(M),XS(c)
        • S(c);N_GUARD,P_SPINS(c)::QAR(M),XS(c)
      • Refutation
        • Q(e);XQ(M)
  • Actual
    • S(F);
    • Threat
      • R1(I)
    • Vars
      • Q(e);OGATE::R(D)+P(E),XQ(e)
      • S(c);OGATE,P_PINR(I)::R(D)+P(E),XS(c)
      • S(c);OGATE,P_PINR(I)::B(K)+P(H),XS(c)
      • S(c);OGATE,P_PINR(I)::QAB(M)
      • S(c);N_GUARD,P_PINR(I),S_CUTR(f)::QAR(M)
      • S(c);N_GUARD,P_PINR(I),S_CUTQ(e)::QAR(M),XR(f)
      • S(c);N_GUARD,P_PINR(I),S_CUTR(f)::QAB(M),XQ(e)
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