MESON Chess Problem Database

Problem Display
PID: 10906 (2QnR3/1N1p4/8/r2k3r/q1pN1Rb1/2Bnp2p/3b3K/8 w - - 0 1)

Haring, Jacobus

1st HM., Stella Polaris, 1969

2QnR3/1N1p4/8/r2k3r/q1pN1Rb1/2Bnp2p/3b3K/8

#2

7 + 12

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Tries
    • 1.Sb5?
      • threat
        • 2.Rd4#
      • 1...Bxc3
        • 2.Sxc3#
      • 1...Sxf4
        • 2.Qc5#
      • 1...Sc6
        • 2.Sc7#
      • 1...Se6
        • 2.Qxd7#
      • 1...Be6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rd4#
      • 1...Bxc3
        • 2.Sxe3#
      • 1...Sxf4
        • 2.Re5#
      • 1...Sc6
        • 2.Qxd7#
      • 1...Se6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(D)
      • Vars
        • B(a);XB(B)::S(C),XB(a)
        • S(b);N_GUARD,XR(D)::QAR1(F)
        • S(l);SBLOCK::S(C)
        • S(l);S_CUTB(g)::QAR2(F),XP(k)
      • Refutation
        • B(g);
  • Actual
    • S(C);
    • Threat
      • R1(D)
    • Vars
      • B(a);N_GUARD,XB(B)::S(C),XP(c)
      • S(b);N_GUARD,XR(D)::R1(G)
      • S(l);S_CUTQ(e)::QAR2(F),XP(k)
      • S(l);SBLOCK::S(C)
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