MESON Chess Problem Database

Problem Display
PID: 261309 (8/1r1r1p2/2B2Rp1/QN1Nk1P1/2p1P2R/B3P3/5P1K/1nn1bb2 w - - 0 1)

Haring, Jacobus

Neue Zurcher Zeitung, 1985

8/1r1r1p2/2B2Rp1/QN1Nk1P1/2p1P2R/B3P3/5P1K/1nn1bb2

#2

12 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Bxd6#
    • 1...Rc7
      • 2.Bd6#
    • 1...Re7
      • 2.Bd6#
    • 1...Sd2
      • 2.Qc3#
  • Tries
    • 1.Sb6?
      • threat
        • 2.f4#
      • 1...Bxf2
        • 2.Sd6#
      • 1...Rd2
        • 2.Sd4#
      • 1...Se2
        • 2.Sxc4#
      • 1...Sd3
        • 2.Sxc4#
      • 1...Rd5!
    • 1.Rf5+?
      • 1...Ke6
        • 2.Sd4#
        • 2.Sf4#
      • 1...gxf5!
    • 1.Qc7+?
      • 1...Rd6
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Rdxc7
        • 2.Bd6#
      • 1...Rbxc7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.f4#
      • 1...Rxd6
        • 2.Bxd6#
      • 1...Bxf2
        • 2.Sb6#
      • 1...Rb2
        • 2.Sb4#
      • 1...Se2
        • 2.Sxc4#
      • 1...Sd3
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(i);N_GUARD::B(C),XR(i)
    • R(i);N_GUARD::B(C)
    • S(a);N_GUARD,S_CUTB(c)::QAB(G)
  • Tries
    • Try
      • S(I);
      • Threat
        • P(A)
      • Vars
        • B(c);N_GUARD,XP(A)::QAR(G)+S(H)
        • R(i);N_GUARD,P_PINP(A),S_CUTB(c)::QAR(G)+S(H)
        • S(b);S_CUTB(d)::S(I),XP(e)
      • Refutation
        • R(i);
    • Try
      • R(L);CHECK
      • Refutation
        • P(g);XR(L)
    • Try
      • Q(G);CHECK
      • Vars
        • R(i);N_GUARD,XQ(G)::B(C)
      • Refutation
        • R(h);XQ(G)
  • Actual
    • S(H);
    • Threat
      • P(A)
    • Vars
      • R(i);OGATE,XS(H)::B(C),XR(i)
      • B(c);N_GUARD,XP(A)::QAR(G)+S(I)
      • R(h);N_GUARD,P_PINP(A)::QAR(G)+S(I)
      • S(b);S_CUTB(d)::S(H),XP(e)
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