MESON Chess Problem Database

Problem Display
PID: 200237 (1K6/3P1NRn/1pp2p2/1rk1pQ2/2p1P3/P1p2Nr1/3PP2B/8 w - - 0 1)

Albarda, Johannes

Het Parool, 1975

1K6/3P1NRn/1pp2p2/1rk1pQ2/2p1P3/P1p2Nr1/3PP2B/8

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Bxg1#
    • 1...Rh3
      • 2.Bg1#
  • Tries
    • 1.S3xe5?
      • threat
        • 2.Sf3#
      • 1...Kd4
        • 2.Sxc6#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Rf3
        • 2.Sxf3#
      • 1...Rg5
        • 2.Qf2#
      • 1...Rd3!
    • 1.Qxf6?
      • threat
        • 2.Qxe5#
        • 2.Qe7#
        • 2.Qd6#
      • 1...Rxf3
        • 2.Qxe5#
        • 2.Qd6#
      • 1...Rb1
        • 2.Qxe5#
      • 1...Rb2
        • 2.Qxe5#
      • 1...Rb3
        • 2.Qxe5#
      • 1...Rb4
        • 2.Qxe5#
      • 1...Ra5
        • 2.Qxe5#
      • 1...Rg5
        • 2.Qe7#
        • 2.Qd6#
      • 1...Rg6
        • 2.Qxe5#
      • 1...Sxf6!
  • Keys
    • 1.S7xe5!
      • threat
        • 2.Sf7#
      • 1...Kd6
        • 2.Sxc4#
      • 1...Rxf3
        • 2.Sxf3#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Rg5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::B(C),XR(b)
    • R(b);N_GUARD::B(C)
  • Tries
    • Try
      • S(E);XP(f)
      • Threat
        • QAR(G)+S(E)
      • Vars
        • K(e);S_FLIGHT::S(E),XP(h)
        • P(i);OGATE,P_SPINP(i),XS(E)::QAR2(G),XP(i)
        • R(b);::QAR(G)+S(E),XR(b)
        • R(b);N_GUARD::QAB(G)
      • Refutation
        • R(b);
    • Try
      • Q(G);N_PINP(f),XP(i)
      • Threat
        • DUALS(3)
      • Vars
        • R(d);::QAR2(G),XP(f)
        • R(b);::QAR2(G),XP(f)
      • Refutation
        • S(j);XQ(G)
  • Actual
    • S(I);XP(f)
    • Threat
      • QAR(G)+S(I)
    • Vars
      • K(e);S_FLIGHT::S(I),XP(c)
      • R(b);XS(E)::QAR(G)+S(I),XR(b)
      • P(i);OGATE,P_SPINP(i),XS(I)::QAR2(G),XP(i)
      • R(b);::QAR(G)+S(I),DCHECK
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