MESON Chess Problem Database

Problem Display
PID: 177453 (8/3p3B/2p2q2/1p3Np1/1Bkp1p1R/P2R2p1/4P1Q1/5K2 w - - 0 1)

Prins, Hendrik

Pedagogusok Lapja, 1980

8/3p3B/2p2q2/1p3Np1/1Bkp1p1R/P2R2p1/4P1Q1/5K2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7
      • 2.Sd6#
    • 1...Qd8
      • 2.Sd6#
    • 1...Qh8
      • 2.Sd6#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qf7
      • 2.Sd6#
    • 1...f3
      • 2.Se3#
    • 1...d6
      • 2.Qxc6#
  • Tries
    • 1.Bg8+?
      • 1...Qe6
        • 2.Sd6#
      • 1...Qf7
        • 2.Sd6#
      • 1...d5!
    • 1.Rxf4?
      • threat
        • 2.Se3#
        • 2.Rc3#
      • 1...Qxf5
        • 2.Rc3#
      • 1...Qe5
        • 2.Rc3#
      • 1...Qe7
        • 2.Rc3#
        • 2.Rfxd4#
      • 1...Qe6
        • 2.Rc3#
        • 2.Rfxd4#
      • 1...gxf4!
  • Keys
    • 1.e4!
      • threat
        • 2.Qc2#
      • 1...Kxd3
        • 2.Qe2#
      • 1...dxe4 ep
        • 2.Sxe3#
      • 1...fxe4 ep
        • 2.Rc3#

This is a version of 177452

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(h);N_GUARD::S(H)
    • Q(h);N_GUARD::S(H),XQ(h)
    • P(d);N_GUARD,P_SPINP(c)::S(H)
    • P(i);N_GUARD,S_CUTQ(h)::QAR2(C),XP(g)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • Q(h);P_SPINQ(h)::S(H)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • R(G);P_PINP(c),XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);P_PINR(G),XS(H)::R1(E)
        • Q(h);::R1(E)
      • Refutation
        • P(f);N_SPINP(c),XR(G)
  • Actual
    • P(B);
    • Threat
      • QAR2(C)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB1(C)
      • P(c);EP,N_GUARD,P_SPINP(d),XP(B)::S(H),XP(c)
      • P(d);EP,P_PINS(H),P_SPINP(c),XP(B)::R1(E)
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