MESON Chess Problem Database

Problem Display
PID: 158194 (b7/3Qp3/8/2bNP3/Rp1pkPP1/1P2p3/2P1NpP1/2nK1B1n w - - 0 1)

Bakker, Peter Arie

Schakend Nederland, 1971

b7/3Qp3/8/2bNP3/Rp1pkPP1/1P2p3/2P1NpP1/2nK1B1n

#2

12 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qf5#
    • 1...Sg3
      • 2.Sxg3#
    • 1...d3
      • 2.Sdc3#
    • 1...e6
      • 2.Sf6#
  • Tries
    • 1.Sxb4?
      • threat
        • 2.Qf5#
      • 1...Bxb4
        • 2.Qxd4#
      • 1...e6
        • 2.Qh7#
      • 1...Sg3!
    • 1.Sc7?
      • threat
        • 2.Qf5#
      • 1...e6
        • 2.Qh7#
      • 1...Sg3!
    • 1.Sxe7?
      • threat
        • 2.Qf5#
      • 1...Bxe7
        • 2.Qxd4#
      • 1...Sg3!
  • Keys
    • 1.c4!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Qf5#
      • 1...bxc4 ep
        • 2.Sexc3#
      • 1...dxc4 ep
        • 2.Sdxc3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...e6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(j);SBLOCK,XS(J)::QAB1(L)
    • S(b);N_GUARD::S(D),XS(b)
    • P(f);N_GUARD,P_SPINP(e)::S(J)
    • P(i);N_GUARD::S(J)
  • Tries
    • Try
      • S(J);XP(e)
      • Threat
        • QAB1(L)
      • Vars
        • B(h);N_GUARD,XS(J)::QAR1(L),XP(f)
        • P(i);OGATE::QAB(L)
      • Refutation
        • S(b);
    • Try
      • S(J);
      • Threat
        • QAB1(L)
      • Vars
        • P(i);OGATE::QAB(L)
      • Refutation
        • S(b);
    • Try
      • S(J);XP(i)
      • Threat
        • QAB1(L)
      • Vars
        • B(h);N_GUARD,XS(J)::QAR1(L),XP(f)
      • Refutation
        • S(b);
  • Actual
    • P(C);
    • Threat
      • QAB1(L)
    • Vars
      • K(g);S_FLIGHT::QAB(L)
      • P(e);EP,N_GUARD,P_SPINP(f),XP(C)::S(D),XP(e)
      • P(f);EP,N_GUARD,P_SPINP(e),XP(C)::S(J),XP(f)
      • S(b);N_GUARD::S(D),XS(b)
      • P(i);OGATE::QAB(L)
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